TOMOYO: Add auditing interface.
Add /sys/kernel/security/tomoyo/audit interface. This interface generates audit logs in the form of domain policy so that /usr/sbin/tomoyo-auditd can reuse audit logs for appending to /sys/kernel/security/tomoyo/domain_policy interface. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
parent
d5ca1725ac
commit
eadd99cc85
9 changed files with 557 additions and 235 deletions
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@ -1 +1 @@
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obj-y = common.o domain.o file.o gc.o group.o load_policy.o memory.o mount.o realpath.o securityfs_if.o tomoyo.o util.o
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obj-y = audit.o common.o domain.o file.o gc.o group.o load_policy.o memory.o mount.o realpath.o securityfs_if.o tomoyo.o util.o
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300
security/tomoyo/audit.c
Normal file
300
security/tomoyo/audit.c
Normal file
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@ -0,0 +1,300 @@
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/*
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* security/tomoyo/audit.c
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*
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* Pathname restriction functions.
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*
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* Copyright (C) 2005-2010 NTT DATA CORPORATION
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*/
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#include "common.h"
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#include <linux/slab.h>
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/**
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* tomoyo_convert_time - Convert time_t to YYYY/MM/DD hh/mm/ss.
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*
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* @time: Seconds since 1970/01/01 00:00:00.
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* @stamp: Pointer to "struct tomoyo_time".
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*
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* Returns nothing.
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*
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* This function does not handle Y2038 problem.
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*/
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static void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp)
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{
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static const u16 tomoyo_eom[2][12] = {
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{ 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
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{ 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
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};
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u16 y;
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u8 m;
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bool r;
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stamp->sec = time % 60;
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time /= 60;
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stamp->min = time % 60;
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time /= 60;
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stamp->hour = time % 24;
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time /= 24;
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for (y = 1970; ; y++) {
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const unsigned short days = (y & 3) ? 365 : 366;
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if (time < days)
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break;
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time -= days;
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}
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r = (y & 3) == 0;
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for (m = 0; m < 11 && time >= tomoyo_eom[r][m]; m++)
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;
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if (m)
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time -= tomoyo_eom[r][m - 1];
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stamp->year = y;
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stamp->month = ++m;
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stamp->day = ++time;
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}
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/**
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* tomoyo_print_header - Get header line of audit log.
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*
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* @r: Pointer to "struct tomoyo_request_info".
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*
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* Returns string representation.
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*
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* This function uses kmalloc(), so caller must kfree() if this function
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* didn't return NULL.
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*/
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static char *tomoyo_print_header(struct tomoyo_request_info *r)
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{
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struct tomoyo_time stamp;
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const pid_t gpid = task_pid_nr(current);
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static const int tomoyo_buffer_len = 4096;
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char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS);
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pid_t ppid;
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if (!buffer)
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return NULL;
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{
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struct timeval tv;
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do_gettimeofday(&tv);
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tomoyo_convert_time(tv.tv_sec, &stamp);
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}
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rcu_read_lock();
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ppid = task_tgid_vnr(current->real_parent);
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rcu_read_unlock();
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snprintf(buffer, tomoyo_buffer_len - 1,
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"#%04u/%02u/%02u %02u:%02u:%02u# profile=%u mode=%s "
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"granted=%s (global-pid=%u) task={ pid=%u ppid=%u "
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"uid=%u gid=%u euid=%u egid=%u suid=%u sgid=%u "
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"fsuid=%u fsgid=%u }",
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stamp.year, stamp.month, stamp.day, stamp.hour,
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stamp.min, stamp.sec, r->profile, tomoyo_mode[r->mode],
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tomoyo_yesno(r->granted), gpid, task_tgid_vnr(current), ppid,
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current_uid(), current_gid(), current_euid(), current_egid(),
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current_suid(), current_sgid(), current_fsuid(),
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current_fsgid());
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return buffer;
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}
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/**
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* tomoyo_init_log - Allocate buffer for audit logs.
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*
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* @r: Pointer to "struct tomoyo_request_info".
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* @len: Buffer size needed for @fmt and @args.
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* @fmt: The printf()'s format string.
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* @args: va_list structure for @fmt.
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*
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* Returns pointer to allocated memory.
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*
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* This function uses kzalloc(), so caller must kfree() if this function
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* didn't return NULL.
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*/
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char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
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va_list args)
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{
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char *buf = NULL;
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const char *header = NULL;
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int pos;
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const char *domainname = tomoyo_domain()->domainname->name;
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header = tomoyo_print_header(r);
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if (!header)
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return NULL;
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/* +10 is for '\n' etc. and '\0'. */
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len += strlen(domainname) + strlen(header) + 10;
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len = tomoyo_round2(len);
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buf = kzalloc(len, GFP_NOFS);
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if (!buf)
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goto out;
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len--;
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pos = snprintf(buf, len, "%s", header);
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pos += snprintf(buf + pos, len - pos, "\n%s\n", domainname);
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vsnprintf(buf + pos, len - pos, fmt, args);
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out:
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kfree(header);
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return buf;
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}
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/* Wait queue for /sys/kernel/security/tomoyo/audit. */
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static DECLARE_WAIT_QUEUE_HEAD(tomoyo_log_wait);
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/* Structure for audit log. */
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struct tomoyo_log {
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struct list_head list;
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char *log;
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int size;
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};
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/* The list for "struct tomoyo_log". */
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static LIST_HEAD(tomoyo_log);
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/* Lock for "struct list_head tomoyo_log". */
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static DEFINE_SPINLOCK(tomoyo_log_lock);
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/* Length of "stuct list_head tomoyo_log". */
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static unsigned int tomoyo_log_count;
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/**
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* tomoyo_get_audit - Get audit mode.
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*
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* @profile: Profile number.
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* @index: Index number of functionality.
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* @is_granted: True if granted log, false otherwise.
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*
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* Returns true if this request should be audited, false otherwise.
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*/
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static bool tomoyo_get_audit(const u8 profile, const u8 index,
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const bool is_granted)
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{
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u8 mode;
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const u8 category = TOMOYO_MAC_CATEGORY_FILE + TOMOYO_MAX_MAC_INDEX;
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struct tomoyo_profile *p;
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if (!tomoyo_policy_loaded)
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return false;
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p = tomoyo_profile(profile);
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if (tomoyo_log_count >= p->pref[TOMOYO_PREF_MAX_AUDIT_LOG])
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return false;
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mode = p->config[index];
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if (mode == TOMOYO_CONFIG_USE_DEFAULT)
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mode = p->config[category];
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if (mode == TOMOYO_CONFIG_USE_DEFAULT)
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mode = p->default_config;
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if (is_granted)
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return mode & TOMOYO_CONFIG_WANT_GRANT_LOG;
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return mode & TOMOYO_CONFIG_WANT_REJECT_LOG;
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}
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/**
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* tomoyo_write_log2 - Write an audit log.
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*
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* @r: Pointer to "struct tomoyo_request_info".
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* @len: Buffer size needed for @fmt and @args.
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* @fmt: The printf()'s format string.
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* @args: va_list structure for @fmt.
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*
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* Returns nothing.
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*/
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void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
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va_list args)
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{
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char *buf;
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struct tomoyo_log *entry;
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bool quota_exceeded = false;
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if (!tomoyo_get_audit(r->profile, r->type, r->granted))
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goto out;
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buf = tomoyo_init_log(r, len, fmt, args);
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if (!buf)
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goto out;
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entry = kzalloc(sizeof(*entry), GFP_NOFS);
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if (!entry) {
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kfree(buf);
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goto out;
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}
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entry->log = buf;
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len = tomoyo_round2(strlen(buf) + 1);
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/*
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* The entry->size is used for memory quota checks.
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* Don't go beyond strlen(entry->log).
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*/
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entry->size = len + tomoyo_round2(sizeof(*entry));
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spin_lock(&tomoyo_log_lock);
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if (tomoyo_memory_quota[TOMOYO_MEMORY_AUDIT] &&
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tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] + entry->size >=
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tomoyo_memory_quota[TOMOYO_MEMORY_AUDIT]) {
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quota_exceeded = true;
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} else {
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tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] += entry->size;
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list_add_tail(&entry->list, &tomoyo_log);
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tomoyo_log_count++;
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}
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spin_unlock(&tomoyo_log_lock);
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if (quota_exceeded) {
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kfree(buf);
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kfree(entry);
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goto out;
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}
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wake_up(&tomoyo_log_wait);
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out:
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return;
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}
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/**
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* tomoyo_write_log - Write an audit log.
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*
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* @r: Pointer to "struct tomoyo_request_info".
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* @fmt: The printf()'s format string, followed by parameters.
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*
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* Returns nothing.
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*/
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void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
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{
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va_list args;
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int len;
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va_start(args, fmt);
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len = vsnprintf((char *) &len, 1, fmt, args) + 1;
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va_end(args);
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va_start(args, fmt);
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tomoyo_write_log2(r, len, fmt, args);
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va_end(args);
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}
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/**
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* tomoyo_read_log - Read an audit log.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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*
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* Returns nothing.
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*/
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void tomoyo_read_log(struct tomoyo_io_buffer *head)
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{
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struct tomoyo_log *ptr = NULL;
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if (head->r.w_pos)
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return;
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kfree(head->read_buf);
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head->read_buf = NULL;
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spin_lock(&tomoyo_log_lock);
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if (!list_empty(&tomoyo_log)) {
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ptr = list_entry(tomoyo_log.next, typeof(*ptr), list);
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list_del(&ptr->list);
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tomoyo_log_count--;
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tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] -= ptr->size;
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}
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spin_unlock(&tomoyo_log_lock);
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if (ptr) {
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head->read_buf = ptr->log;
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head->r.w[head->r.w_pos++] = head->read_buf;
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kfree(ptr);
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}
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}
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/**
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* tomoyo_poll_log - Wait for an audit log.
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*
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* @file: Pointer to "struct file".
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* @wait: Pointer to "poll_table".
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*
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* Returns POLLIN | POLLRDNORM when ready to read an audit log.
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*/
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int tomoyo_poll_log(struct file *file, poll_table *wait)
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{
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if (tomoyo_log_count)
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return POLLIN | POLLRDNORM;
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poll_wait(file, &tomoyo_log_wait, wait);
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if (tomoyo_log_count)
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return POLLIN | POLLRDNORM;
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return 0;
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}
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@ -17,9 +17,12 @@ static unsigned int tomoyo_profile_version;
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/* Profile table. Memory is allocated as needed. */
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static struct tomoyo_profile *tomoyo_profile_ptr[TOMOYO_MAX_PROFILES];
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/* String table for functionality that takes 4 modes. */
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static const char *tomoyo_mode[4] = {
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"disabled", "learning", "permissive", "enforcing"
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/* String table for operation mode. */
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const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = {
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[TOMOYO_CONFIG_DISABLED] = "disabled",
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[TOMOYO_CONFIG_LEARNING] = "learning",
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[TOMOYO_CONFIG_PERMISSIVE] = "permissive",
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[TOMOYO_CONFIG_ENFORCING] = "enforcing"
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};
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/* String table for /sys/kernel/security/tomoyo/profile */
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@ -53,6 +56,7 @@ static const char *tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
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/* String table for PREFERENCE keyword. */
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static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = {
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[TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log",
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[TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry",
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};
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@ -66,12 +70,10 @@ static bool tomoyo_manage_by_non_root;
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*
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* @value: Bool value.
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*/
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/*
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static const char *tomoyo_yesno(const unsigned int value)
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const char *tomoyo_yesno(const unsigned int value)
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{
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return value ? "yes" : "no";
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}
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*/
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/**
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* tomoyo_addprintf - strncat()-like-snprintf().
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@ -117,7 +119,7 @@ static bool tomoyo_flush(struct tomoyo_io_buffer *head)
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head->r.w[0] = w;
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if (*w)
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return false;
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/* Add '\0' for query. */
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/* Add '\0' for audit logs and query. */
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if (head->poll) {
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if (!head->read_user_buf_avail ||
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copy_to_user(head->read_user_buf, "", 1))
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@ -300,9 +302,12 @@ static struct tomoyo_profile *tomoyo_assign_profile(const unsigned int profile)
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ptr = tomoyo_profile_ptr[profile];
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if (!ptr && tomoyo_memory_ok(entry)) {
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ptr = entry;
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ptr->default_config = TOMOYO_CONFIG_DISABLED;
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ptr->default_config = TOMOYO_CONFIG_DISABLED |
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TOMOYO_CONFIG_WANT_GRANT_LOG |
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TOMOYO_CONFIG_WANT_REJECT_LOG;
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memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT,
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sizeof(ptr->config));
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ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] = 1024;
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ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] = 2048;
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mb(); /* Avoid out-of-order execution. */
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tomoyo_profile_ptr[profile] = ptr;
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@ -338,7 +343,6 @@ struct tomoyo_profile *tomoyo_profile(const u8 profile)
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*
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* Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
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*/
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/*
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static s8 tomoyo_find_yesno(const char *string, const char *find)
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{
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const char *cp = strstr(string, find);
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@ -351,7 +355,6 @@ static s8 tomoyo_find_yesno(const char *string, const char *find)
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}
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return -1;
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}
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*/
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/**
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* tomoyo_set_uint - Set value for specified preference.
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@ -412,6 +415,24 @@ static int tomoyo_set_mode(char *name, const char *value,
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* 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
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*/
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config = (config & ~7) | mode;
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if (config != TOMOYO_CONFIG_USE_DEFAULT) {
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switch (tomoyo_find_yesno(value, "grant_log")) {
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case 1:
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config |= TOMOYO_CONFIG_WANT_GRANT_LOG;
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break;
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case 0:
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config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG;
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break;
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}
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switch (tomoyo_find_yesno(value, "reject_log")) {
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case 1:
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config |= TOMOYO_CONFIG_WANT_REJECT_LOG;
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break;
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case 0:
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config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG;
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break;
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}
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}
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}
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if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
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profile->config[i] = config;
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@ -469,15 +490,30 @@ static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
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return tomoyo_set_mode(data, cp, profile);
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}
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/**
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* tomoyo_print_config - Print mode for specified functionality.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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* @config: Mode for that functionality.
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*
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* Returns nothing.
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*
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* Caller prints functionality's name.
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*/
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static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config)
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{
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tomoyo_io_printf(head, "={ mode=%s }\n", tomoyo_mode[config & 3]);
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tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n",
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tomoyo_mode[config & 3],
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tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG),
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tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG));
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}
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/**
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* tomoyo_read_profile - Read profile table.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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*
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* Returns nothing.
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*/
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static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
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{
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||||
|
@ -488,7 +524,7 @@ static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
|
|||
profile = tomoyo_profile_ptr[index];
|
||||
switch (head->r.step) {
|
||||
case 0:
|
||||
tomoyo_io_printf(head, "PROFILE_VERSION=%s\n", "20090903");
|
||||
tomoyo_io_printf(head, "PROFILE_VERSION=%u\n", 20090903);
|
||||
head->r.step++;
|
||||
break;
|
||||
case 1:
|
||||
|
@ -1359,103 +1395,68 @@ static void tomoyo_read_exception(struct tomoyo_io_buffer *head)
|
|||
head->r.eof = true;
|
||||
}
|
||||
|
||||
/**
|
||||
* tomoyo_print_header - Get header line of audit log.
|
||||
*
|
||||
* @r: Pointer to "struct tomoyo_request_info".
|
||||
*
|
||||
* Returns string representation.
|
||||
*
|
||||
* This function uses kmalloc(), so caller must kfree() if this function
|
||||
* didn't return NULL.
|
||||
*/
|
||||
static char *tomoyo_print_header(struct tomoyo_request_info *r)
|
||||
{
|
||||
struct timeval tv;
|
||||
const pid_t gpid = task_pid_nr(current);
|
||||
static const int tomoyo_buffer_len = 4096;
|
||||
char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS);
|
||||
pid_t ppid;
|
||||
if (!buffer)
|
||||
return NULL;
|
||||
do_gettimeofday(&tv);
|
||||
rcu_read_lock();
|
||||
ppid = task_tgid_vnr(current->real_parent);
|
||||
rcu_read_unlock();
|
||||
snprintf(buffer, tomoyo_buffer_len - 1,
|
||||
"#timestamp=%lu profile=%u mode=%s (global-pid=%u)"
|
||||
" task={ pid=%u ppid=%u uid=%u gid=%u euid=%u"
|
||||
" egid=%u suid=%u sgid=%u fsuid=%u fsgid=%u }",
|
||||
tv.tv_sec, r->profile, tomoyo_mode[r->mode], gpid,
|
||||
task_tgid_vnr(current), ppid,
|
||||
current_uid(), current_gid(), current_euid(),
|
||||
current_egid(), current_suid(), current_sgid(),
|
||||
current_fsuid(), current_fsgid());
|
||||
return buffer;
|
||||
}
|
||||
|
||||
/**
|
||||
* tomoyo_init_audit_log - Allocate buffer for audit logs.
|
||||
*
|
||||
* @len: Required size.
|
||||
* @r: Pointer to "struct tomoyo_request_info".
|
||||
*
|
||||
* Returns pointer to allocated memory.
|
||||
*
|
||||
* The @len is updated to add the header lines' size on success.
|
||||
*
|
||||
* This function uses kzalloc(), so caller must kfree() if this function
|
||||
* didn't return NULL.
|
||||
*/
|
||||
static char *tomoyo_init_audit_log(int *len, struct tomoyo_request_info *r)
|
||||
{
|
||||
char *buf = NULL;
|
||||
const char *header;
|
||||
const char *domainname;
|
||||
if (!r->domain)
|
||||
r->domain = tomoyo_domain();
|
||||
domainname = r->domain->domainname->name;
|
||||
header = tomoyo_print_header(r);
|
||||
if (!header)
|
||||
return NULL;
|
||||
*len += strlen(domainname) + strlen(header) + 10;
|
||||
buf = kzalloc(*len, GFP_NOFS);
|
||||
if (buf)
|
||||
snprintf(buf, (*len) - 1, "%s\n%s\n", header, domainname);
|
||||
kfree(header);
|
||||
return buf;
|
||||
}
|
||||
|
||||
/* Wait queue for tomoyo_query_list. */
|
||||
/* Wait queue for kernel -> userspace notification. */
|
||||
static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait);
|
||||
|
||||
/* Lock for manipulating tomoyo_query_list. */
|
||||
static DEFINE_SPINLOCK(tomoyo_query_list_lock);
|
||||
/* Wait queue for userspace -> kernel notification. */
|
||||
static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait);
|
||||
|
||||
/* Structure for query. */
|
||||
struct tomoyo_query {
|
||||
struct list_head list;
|
||||
char *query;
|
||||
int query_len;
|
||||
size_t query_len;
|
||||
unsigned int serial;
|
||||
int timer;
|
||||
int answer;
|
||||
u8 timer;
|
||||
u8 answer;
|
||||
u8 retry;
|
||||
};
|
||||
|
||||
/* The list for "struct tomoyo_query". */
|
||||
static LIST_HEAD(tomoyo_query_list);
|
||||
|
||||
/* Lock for manipulating tomoyo_query_list. */
|
||||
static DEFINE_SPINLOCK(tomoyo_query_list_lock);
|
||||
|
||||
/*
|
||||
* Number of "struct file" referring /sys/kernel/security/tomoyo/query
|
||||
* interface.
|
||||
*/
|
||||
static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
|
||||
|
||||
/**
|
||||
* tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
|
||||
*
|
||||
* @domain: Pointer to "struct tomoyo_domain_info".
|
||||
* @header: Lines containing ACL.
|
||||
*
|
||||
* Returns nothing.
|
||||
*/
|
||||
static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header)
|
||||
{
|
||||
char *buffer;
|
||||
char *cp = strchr(header, '\n');
|
||||
int len;
|
||||
if (!cp)
|
||||
return;
|
||||
cp = strchr(cp + 1, '\n');
|
||||
if (!cp)
|
||||
return;
|
||||
*cp++ = '\0';
|
||||
len = strlen(cp) + 1;
|
||||
buffer = kmalloc(len, GFP_NOFS);
|
||||
if (!buffer)
|
||||
return;
|
||||
snprintf(buffer, len - 1, "%s", cp);
|
||||
tomoyo_normalize_line(buffer);
|
||||
tomoyo_write_domain2(&domain->acl_info_list, buffer, false);
|
||||
kfree(buffer);
|
||||
}
|
||||
|
||||
/**
|
||||
* tomoyo_supervisor - Ask for the supervisor's decision.
|
||||
*
|
||||
* @r: Pointer to "struct tomoyo_request_info".
|
||||
* @fmt: The printf()'s format string, followed by parameters.
|
||||
* @r: Pointer to "struct tomoyo_request_info".
|
||||
* @fmt: The printf()'s format string, followed by parameters.
|
||||
*
|
||||
* Returns 0 if the supervisor decided to permit the access request which
|
||||
* violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
|
||||
|
@ -1465,88 +1466,77 @@ static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
|
|||
int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
|
||||
{
|
||||
va_list args;
|
||||
int error = -EPERM;
|
||||
int pos;
|
||||
int error;
|
||||
int len;
|
||||
static unsigned int tomoyo_serial;
|
||||
struct tomoyo_query *entry = NULL;
|
||||
struct tomoyo_query entry = { };
|
||||
bool quota_exceeded = false;
|
||||
char *header;
|
||||
va_start(args, fmt);
|
||||
len = vsnprintf((char *) &len, 1, fmt, args) + 1;
|
||||
va_end(args);
|
||||
/* Write /sys/kernel/security/tomoyo/audit. */
|
||||
va_start(args, fmt);
|
||||
tomoyo_write_log2(r, len, fmt, args);
|
||||
va_end(args);
|
||||
/* Nothing more to do if granted. */
|
||||
if (r->granted)
|
||||
return 0;
|
||||
switch (r->mode) {
|
||||
char *buffer;
|
||||
case TOMOYO_CONFIG_ENFORCING:
|
||||
error = -EPERM;
|
||||
if (atomic_read(&tomoyo_query_observers))
|
||||
break;
|
||||
goto out;
|
||||
case TOMOYO_CONFIG_LEARNING:
|
||||
if (!tomoyo_domain_quota_is_ok(r))
|
||||
return 0;
|
||||
va_start(args, fmt);
|
||||
len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 4;
|
||||
va_end(args);
|
||||
buffer = kmalloc(len, GFP_NOFS);
|
||||
if (!buffer)
|
||||
return 0;
|
||||
va_start(args, fmt);
|
||||
vsnprintf(buffer, len - 1, fmt, args);
|
||||
va_end(args);
|
||||
tomoyo_normalize_line(buffer);
|
||||
tomoyo_write_domain2(&r->domain->acl_info_list, buffer, false);
|
||||
kfree(buffer);
|
||||
error = 0;
|
||||
/* Check max_learning_entry parameter. */
|
||||
if (tomoyo_domain_quota_is_ok(r))
|
||||
break;
|
||||
/* fall through */
|
||||
case TOMOYO_CONFIG_PERMISSIVE:
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
if (!r->domain)
|
||||
r->domain = tomoyo_domain();
|
||||
if (!atomic_read(&tomoyo_query_observers))
|
||||
return -EPERM;
|
||||
/* Get message. */
|
||||
va_start(args, fmt);
|
||||
len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 32;
|
||||
entry.query = tomoyo_init_log(r, len, fmt, args);
|
||||
va_end(args);
|
||||
header = tomoyo_init_audit_log(&len, r);
|
||||
if (!header)
|
||||
if (!entry.query)
|
||||
goto out;
|
||||
entry = kzalloc(sizeof(*entry), GFP_NOFS);
|
||||
if (!entry)
|
||||
entry.query_len = strlen(entry.query) + 1;
|
||||
if (!error) {
|
||||
tomoyo_add_entry(r->domain, entry.query);
|
||||
goto out;
|
||||
entry->query = kzalloc(len, GFP_NOFS);
|
||||
if (!entry->query)
|
||||
goto out;
|
||||
len = ksize(entry->query);
|
||||
}
|
||||
len = tomoyo_round2(entry.query_len);
|
||||
spin_lock(&tomoyo_query_list_lock);
|
||||
if (tomoyo_quota_for_query && tomoyo_query_memory_size + len +
|
||||
sizeof(*entry) >= tomoyo_quota_for_query) {
|
||||
if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] &&
|
||||
tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len
|
||||
>= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) {
|
||||
quota_exceeded = true;
|
||||
} else {
|
||||
tomoyo_query_memory_size += len + sizeof(*entry);
|
||||
entry->serial = tomoyo_serial++;
|
||||
entry.serial = tomoyo_serial++;
|
||||
entry.retry = r->retry;
|
||||
tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len;
|
||||
list_add_tail(&entry.list, &tomoyo_query_list);
|
||||
}
|
||||
spin_unlock(&tomoyo_query_list_lock);
|
||||
if (quota_exceeded)
|
||||
goto out;
|
||||
pos = snprintf(entry->query, len - 1, "Q%u-%hu\n%s",
|
||||
entry->serial, r->retry, header);
|
||||
kfree(header);
|
||||
header = NULL;
|
||||
va_start(args, fmt);
|
||||
vsnprintf(entry->query + pos, len - 1 - pos, fmt, args);
|
||||
entry->query_len = strlen(entry->query) + 1;
|
||||
va_end(args);
|
||||
spin_lock(&tomoyo_query_list_lock);
|
||||
list_add_tail(&entry->list, &tomoyo_query_list);
|
||||
spin_unlock(&tomoyo_query_list_lock);
|
||||
/* Give 10 seconds for supervisor's opinion. */
|
||||
for (entry->timer = 0;
|
||||
atomic_read(&tomoyo_query_observers) && entry->timer < 100;
|
||||
entry->timer++) {
|
||||
wake_up(&tomoyo_query_wait);
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
schedule_timeout(HZ / 10);
|
||||
if (entry->answer)
|
||||
while (entry.timer < 10) {
|
||||
wake_up_all(&tomoyo_query_wait);
|
||||
if (wait_event_interruptible_timeout
|
||||
(tomoyo_answer_wait, entry.answer ||
|
||||
!atomic_read(&tomoyo_query_observers), HZ))
|
||||
break;
|
||||
else
|
||||
entry.timer++;
|
||||
}
|
||||
spin_lock(&tomoyo_query_list_lock);
|
||||
list_del(&entry->list);
|
||||
tomoyo_query_memory_size -= len + sizeof(*entry);
|
||||
list_del(&entry.list);
|
||||
tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len;
|
||||
spin_unlock(&tomoyo_query_list_lock);
|
||||
switch (entry->answer) {
|
||||
switch (entry.answer) {
|
||||
case 3: /* Asked to retry by administrator. */
|
||||
error = TOMOYO_RETRY_REQUEST;
|
||||
r->retry++;
|
||||
|
@ -1555,18 +1545,12 @@ int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
|
|||
/* Granted by administrator. */
|
||||
error = 0;
|
||||
break;
|
||||
case 0:
|
||||
/* Timed out. */
|
||||
break;
|
||||
default:
|
||||
/* Rejected by administrator. */
|
||||
/* Timed out or rejected by administrator. */
|
||||
break;
|
||||
}
|
||||
out:
|
||||
if (entry)
|
||||
kfree(entry->query);
|
||||
kfree(entry);
|
||||
kfree(header);
|
||||
out:
|
||||
kfree(entry.query);
|
||||
return error;
|
||||
}
|
||||
|
||||
|
@ -1637,7 +1621,7 @@ static void tomoyo_read_query(struct tomoyo_io_buffer *head)
|
|||
head->r.query_index = 0;
|
||||
return;
|
||||
}
|
||||
buf = kzalloc(len, GFP_NOFS);
|
||||
buf = kzalloc(len + 32, GFP_NOFS);
|
||||
if (!buf)
|
||||
return;
|
||||
pos = 0;
|
||||
|
@ -1653,7 +1637,8 @@ static void tomoyo_read_query(struct tomoyo_io_buffer *head)
|
|||
* can change, but I don't care.
|
||||
*/
|
||||
if (len == ptr->query_len)
|
||||
memmove(buf, ptr->query, len);
|
||||
snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial,
|
||||
ptr->retry, ptr->query);
|
||||
break;
|
||||
}
|
||||
spin_unlock(&tomoyo_query_list_lock);
|
||||
|
@ -1764,6 +1749,11 @@ int tomoyo_open_control(const u8 type, struct file *file)
|
|||
head->write = tomoyo_write_exception;
|
||||
head->read = tomoyo_read_exception;
|
||||
break;
|
||||
case TOMOYO_AUDIT:
|
||||
/* /sys/kernel/security/tomoyo/audit */
|
||||
head->poll = tomoyo_poll_log;
|
||||
head->read = tomoyo_read_log;
|
||||
break;
|
||||
case TOMOYO_SELFDOMAIN:
|
||||
/* /sys/kernel/security/tomoyo/self_domain */
|
||||
head->read = tomoyo_read_self_domain;
|
||||
|
@ -1837,7 +1827,7 @@ int tomoyo_open_control(const u8 type, struct file *file)
|
|||
return -ENOMEM;
|
||||
}
|
||||
}
|
||||
if (type != TOMOYO_QUERY)
|
||||
if (type != TOMOYO_QUERY && type != TOMOYO_AUDIT)
|
||||
head->reader_idx = tomoyo_read_lock();
|
||||
file->private_data = head;
|
||||
/*
|
||||
|
@ -1858,7 +1848,8 @@ int tomoyo_open_control(const u8 type, struct file *file)
|
|||
* @wait: Pointer to "poll_table".
|
||||
*
|
||||
* Waits for read readiness.
|
||||
* /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd .
|
||||
* /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd and
|
||||
* /sys/kernel/security/tomoyo/audit is handled by /usr/sbin/tomoyo-auditd.
|
||||
*/
|
||||
int tomoyo_poll_control(struct file *file, poll_table *wait)
|
||||
{
|
||||
|
@ -1970,7 +1961,7 @@ int tomoyo_close_control(struct tomoyo_io_buffer *head)
|
|||
*/
|
||||
if (head->type == TOMOYO_QUERY)
|
||||
atomic_dec(&tomoyo_query_observers);
|
||||
else
|
||||
else if (head->type != TOMOYO_AUDIT)
|
||||
tomoyo_read_unlock(head->reader_idx);
|
||||
/* Release memory used for policy I/O. */
|
||||
kfree(head->read_buf);
|
||||
|
|
|
@ -44,7 +44,10 @@ enum tomoyo_mode_index {
|
|||
TOMOYO_CONFIG_LEARNING,
|
||||
TOMOYO_CONFIG_PERMISSIVE,
|
||||
TOMOYO_CONFIG_ENFORCING,
|
||||
TOMOYO_CONFIG_USE_DEFAULT = 255
|
||||
TOMOYO_CONFIG_MAX_MODE,
|
||||
TOMOYO_CONFIG_WANT_REJECT_LOG = 64,
|
||||
TOMOYO_CONFIG_WANT_GRANT_LOG = 128,
|
||||
TOMOYO_CONFIG_USE_DEFAULT = 255,
|
||||
};
|
||||
|
||||
/* Index numbers for entry type. */
|
||||
|
@ -115,6 +118,13 @@ enum tomoyo_path_acl_index {
|
|||
TOMOYO_MAX_PATH_OPERATION
|
||||
};
|
||||
|
||||
enum tomoyo_memory_stat_type {
|
||||
TOMOYO_MEMORY_POLICY,
|
||||
TOMOYO_MEMORY_AUDIT,
|
||||
TOMOYO_MEMORY_QUERY,
|
||||
TOMOYO_MAX_MEMORY_STAT
|
||||
};
|
||||
|
||||
enum tomoyo_mkdev_acl_index {
|
||||
TOMOYO_TYPE_MKBLOCK,
|
||||
TOMOYO_TYPE_MKCHAR,
|
||||
|
@ -150,6 +160,7 @@ enum tomoyo_securityfs_interface_index {
|
|||
TOMOYO_PROCESS_STATUS,
|
||||
TOMOYO_MEMINFO,
|
||||
TOMOYO_SELFDOMAIN,
|
||||
TOMOYO_AUDIT,
|
||||
TOMOYO_VERSION,
|
||||
TOMOYO_PROFILE,
|
||||
TOMOYO_QUERY,
|
||||
|
@ -213,6 +224,7 @@ enum tomoyo_mac_category_index {
|
|||
|
||||
/* Index numbers for profile's PREFERENCE values. */
|
||||
enum tomoyo_pref_index {
|
||||
TOMOYO_PREF_MAX_AUDIT_LOG,
|
||||
TOMOYO_PREF_MAX_LEARNING_ENTRY,
|
||||
TOMOYO_MAX_PREF
|
||||
};
|
||||
|
@ -506,13 +518,21 @@ struct tomoyo_profile {
|
|||
unsigned int pref[TOMOYO_MAX_PREF];
|
||||
};
|
||||
|
||||
/* Structure for representing YYYY/MM/DD hh/mm/ss. */
|
||||
struct tomoyo_time {
|
||||
u16 year;
|
||||
u8 month;
|
||||
u8 day;
|
||||
u8 hour;
|
||||
u8 min;
|
||||
u8 sec;
|
||||
};
|
||||
|
||||
/********** Function prototypes. **********/
|
||||
|
||||
bool tomoyo_str_starts(char **src, const char *find);
|
||||
const char *tomoyo_get_exe(void);
|
||||
void tomoyo_normalize_line(unsigned char *buffer);
|
||||
void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
|
||||
__attribute__ ((format(printf, 2, 3)));
|
||||
void tomoyo_check_profile(void);
|
||||
int tomoyo_open_control(const u8 type, struct file *file);
|
||||
int tomoyo_close_control(struct tomoyo_io_buffer *head);
|
||||
|
@ -620,6 +640,14 @@ void tomoyo_check_acl(struct tomoyo_request_info *r,
|
|||
char *tomoyo_read_token(struct tomoyo_acl_param *param);
|
||||
bool tomoyo_permstr(const char *string, const char *keyword);
|
||||
|
||||
const char *tomoyo_yesno(const unsigned int value);
|
||||
void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
|
||||
va_list args);
|
||||
void tomoyo_read_log(struct tomoyo_io_buffer *head);
|
||||
int tomoyo_poll_log(struct file *file, poll_table *wait);
|
||||
char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
|
||||
va_list args);
|
||||
|
||||
/********** External variable definitions. **********/
|
||||
|
||||
/* Lock for GC. */
|
||||
|
@ -650,8 +678,9 @@ extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
|
|||
extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
|
||||
extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
|
||||
|
||||
extern unsigned int tomoyo_quota_for_query;
|
||||
extern unsigned int tomoyo_query_memory_size;
|
||||
extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
|
||||
extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
|
||||
extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
|
||||
|
||||
/********** Inlined functions. **********/
|
||||
|
||||
|
@ -773,6 +802,50 @@ static inline bool tomoyo_same_number_union
|
|||
a->value_type[1] == b->value_type[1];
|
||||
}
|
||||
|
||||
#if defined(CONFIG_SLOB)
|
||||
|
||||
/**
|
||||
* tomoyo_round2 - Round up to power of 2 for calculating memory usage.
|
||||
*
|
||||
* @size: Size to be rounded up.
|
||||
*
|
||||
* Returns @size.
|
||||
*
|
||||
* Since SLOB does not round up, this function simply returns @size.
|
||||
*/
|
||||
static inline int tomoyo_round2(size_t size)
|
||||
{
|
||||
return size;
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
/**
|
||||
* tomoyo_round2 - Round up to power of 2 for calculating memory usage.
|
||||
*
|
||||
* @size: Size to be rounded up.
|
||||
*
|
||||
* Returns rounded size.
|
||||
*
|
||||
* Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
|
||||
* (e.g.) 128 bytes.
|
||||
*/
|
||||
static inline int tomoyo_round2(size_t size)
|
||||
{
|
||||
#if PAGE_SIZE == 4096
|
||||
size_t bsize = 32;
|
||||
#else
|
||||
size_t bsize = 64;
|
||||
#endif
|
||||
if (!size)
|
||||
return 0;
|
||||
while (size > bsize)
|
||||
bsize <<= 1;
|
||||
return bsize;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/**
|
||||
* list_for_each_cookie - iterate over a list with cookie.
|
||||
* @pos: the &struct list_head to use as a loop cursor.
|
||||
|
|
|
@ -206,12 +206,9 @@ static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, struct path *path)
|
|||
*/
|
||||
static int tomoyo_audit_path_log(struct tomoyo_request_info *r)
|
||||
{
|
||||
const char *operation = tomoyo_path_keyword[r->param.path.operation];
|
||||
const struct tomoyo_path_info *filename = r->param.path.filename;
|
||||
if (r->granted)
|
||||
return 0;
|
||||
tomoyo_warn_log(r, "%s %s", operation, filename->name);
|
||||
return tomoyo_supervisor(r, "file %s %s\n", operation, filename->name);
|
||||
return tomoyo_supervisor(r, "file %s %s\n", tomoyo_path_keyword
|
||||
[r->param.path.operation],
|
||||
r->param.path.filename->name);
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -223,15 +220,10 @@ static int tomoyo_audit_path_log(struct tomoyo_request_info *r)
|
|||
*/
|
||||
static int tomoyo_audit_path2_log(struct tomoyo_request_info *r)
|
||||
{
|
||||
const char *operation = tomoyo_path2_keyword[r->param.path2.operation];
|
||||
const struct tomoyo_path_info *filename1 = r->param.path2.filename1;
|
||||
const struct tomoyo_path_info *filename2 = r->param.path2.filename2;
|
||||
if (r->granted)
|
||||
return 0;
|
||||
tomoyo_warn_log(r, "%s %s %s", operation, filename1->name,
|
||||
filename2->name);
|
||||
return tomoyo_supervisor(r, "file %s %s %s\n", operation,
|
||||
filename1->name, filename2->name);
|
||||
return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_path2_keyword
|
||||
[r->param.path2.operation],
|
||||
r->param.path2.filename1->name,
|
||||
r->param.path2.filename2->name);
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -243,17 +235,12 @@ static int tomoyo_audit_path2_log(struct tomoyo_request_info *r)
|
|||
*/
|
||||
static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r)
|
||||
{
|
||||
const char *operation = tomoyo_mkdev_keyword[r->param.mkdev.operation];
|
||||
const struct tomoyo_path_info *filename = r->param.mkdev.filename;
|
||||
const unsigned int major = r->param.mkdev.major;
|
||||
const unsigned int minor = r->param.mkdev.minor;
|
||||
const unsigned int mode = r->param.mkdev.mode;
|
||||
if (r->granted)
|
||||
return 0;
|
||||
tomoyo_warn_log(r, "%s %s 0%o %u %u", operation, filename->name, mode,
|
||||
major, minor);
|
||||
return tomoyo_supervisor(r, "file %s %s 0%o %u %u\n", operation,
|
||||
filename->name, mode, major, minor);
|
||||
return tomoyo_supervisor(r, "file %s %s 0%o %u %u\n",
|
||||
tomoyo_mkdev_keyword
|
||||
[r->param.mkdev.operation],
|
||||
r->param.mkdev.filename->name,
|
||||
r->param.mkdev.mode, r->param.mkdev.major,
|
||||
r->param.mkdev.minor);
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -267,11 +254,7 @@ static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r)
|
|||
{
|
||||
const u8 type = r->param.path_number.operation;
|
||||
u8 radix;
|
||||
const struct tomoyo_path_info *filename = r->param.path_number.filename;
|
||||
const char *operation = tomoyo_path_number_keyword[type];
|
||||
char buffer[64];
|
||||
if (r->granted)
|
||||
return 0;
|
||||
switch (type) {
|
||||
case TOMOYO_TYPE_CREATE:
|
||||
case TOMOYO_TYPE_MKDIR:
|
||||
|
@ -289,9 +272,9 @@ static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r)
|
|||
}
|
||||
tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number,
|
||||
radix);
|
||||
tomoyo_warn_log(r, "%s %s %s", operation, filename->name, buffer);
|
||||
return tomoyo_supervisor(r, "file %s %s %s\n", operation,
|
||||
filename->name, buffer);
|
||||
return tomoyo_supervisor(r, "file %s %s %s\n",
|
||||
tomoyo_path_number_keyword[type],
|
||||
r->param.path_number.filename->name, buffer);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
|
@ -29,6 +29,11 @@ void tomoyo_warn_oom(const char *function)
|
|||
panic("MAC Initialization failed.\n");
|
||||
}
|
||||
|
||||
/* Memoy currently used by policy/audit log/query. */
|
||||
unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
|
||||
/* Memory quota for "policy"/"audit log"/"query". */
|
||||
unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
|
||||
|
||||
/* Memory allocated for policy. */
|
||||
static atomic_t tomoyo_policy_memory_size;
|
||||
/* Quota for holding policy. */
|
||||
|
|
|
@ -27,29 +27,11 @@ static const char * const tomoyo_mounts[TOMOYO_MAX_SPECIAL_MOUNT] = {
|
|||
*/
|
||||
static int tomoyo_audit_mount_log(struct tomoyo_request_info *r)
|
||||
{
|
||||
const char *dev = r->param.mount.dev->name;
|
||||
const char *dir = r->param.mount.dir->name;
|
||||
const char *type = r->param.mount.type->name;
|
||||
const unsigned long flags = r->param.mount.flags;
|
||||
if (r->granted)
|
||||
return 0;
|
||||
if (type == tomoyo_mounts[TOMOYO_MOUNT_REMOUNT])
|
||||
tomoyo_warn_log(r, "mount -o remount %s 0x%lX", dir, flags);
|
||||
else if (type == tomoyo_mounts[TOMOYO_MOUNT_BIND]
|
||||
|| type == tomoyo_mounts[TOMOYO_MOUNT_MOVE])
|
||||
tomoyo_warn_log(r, "mount %s %s %s 0x%lX", type, dev, dir,
|
||||
flags);
|
||||
else if (type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE] ||
|
||||
type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE] ||
|
||||
type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE] ||
|
||||
type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED])
|
||||
tomoyo_warn_log(r, "mount %s %s 0x%lX", type, dir, flags);
|
||||
else
|
||||
tomoyo_warn_log(r, "mount -t %s %s %s 0x%lX", type, dev, dir,
|
||||
flags);
|
||||
return tomoyo_supervisor(r, "allow_mount %s %s %s 0x%lX\n",
|
||||
return tomoyo_supervisor(r, "file mount %s %s %s 0x%lX\n",
|
||||
r->param.mount.dev->name,
|
||||
r->param.mount.dir->name, type, flags);
|
||||
r->param.mount.dir->name,
|
||||
r->param.mount.type->name,
|
||||
r->param.mount.flags);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
|
@ -135,6 +135,8 @@ static int __init tomoyo_initerface_init(void)
|
|||
TOMOYO_DOMAINPOLICY);
|
||||
tomoyo_create_entry("exception_policy", 0600, tomoyo_dir,
|
||||
TOMOYO_EXCEPTIONPOLICY);
|
||||
tomoyo_create_entry("audit", 0400, tomoyo_dir,
|
||||
TOMOYO_AUDIT);
|
||||
tomoyo_create_entry("self_domain", 0400, tomoyo_dir,
|
||||
TOMOYO_SELFDOMAIN);
|
||||
tomoyo_create_entry(".domain_status", 0600, tomoyo_dir,
|
||||
|
|
|
@ -891,20 +891,6 @@ const char *tomoyo_last_word(const char *name)
|
|||
return name;
|
||||
}
|
||||
|
||||
/**
|
||||
* tomoyo_warn_log - Print warning or error message on console.
|
||||
*
|
||||
* @r: Pointer to "struct tomoyo_request_info".
|
||||
* @fmt: The printf()'s format string, followed by parameters.
|
||||
*/
|
||||
void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
|
||||
{
|
||||
/*
|
||||
* Temporarily disabled.
|
||||
* Will be replaced with /sys/kernel/security/tomoyo/audit interface.
|
||||
*/
|
||||
}
|
||||
|
||||
/**
|
||||
* tomoyo_domain_quota_is_ok - Check for domain's quota.
|
||||
*
|
||||
|
|
Loading…
Reference in a new issue