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[PATCH] Miscellaneous bug and warning fixes

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This patch fixes a couple of bugs revealed in new features recently
added to -mm1:
* fixes warnings due to inconsistent use of const struct inode *inode
* fixes bug that prevent a kernel from booting with audit on, and SELinux off
  due to a missing function in security/dummy.c
* fixes a bug that throws spurious audit_panic() messages due to a missing
  return just before an error_path label
* some reasonable house cleaning in audit_ipc_context(),
  audit_inode_context(), and audit_log_task_context()

Signed-off-by: Dustin Kirkland <dustin.kirkland@us.ibm.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
Dustin Kirkland 2005-11-16 15:53:13 +00:00 committed by Al Viro
parent 8c8570fb8f
commit 7306a0b9b3
4 changed files with 24 additions and 15 deletions
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8
include/linux/security.h
View file

@ -1173,8 +1173,8 @@ struct security_operations {
int (*inode_getxattr) (struct dentry *dentry, char *name);
int (*inode_listxattr) (struct dentry *dentry);
int (*inode_removexattr) (struct dentry *dentry, char *name);
char *(*inode_xattr_getsuffix) (void);
int (*inode_getsecurity)(struct inode *inode, const char *name, void *buffer, size_t size, int err);
const char *(*inode_xattr_getsuffix) (void);
int (*inode_getsecurity)(const struct inode *inode, const char *name, void *buffer, size_t size, int err);
int (*inode_setsecurity)(struct inode *inode, const char *name, const void *value, size_t size, int flags);
int (*inode_listsecurity)(struct inode *inode, char *buffer, size_t buffer_size);
@ -1686,7 +1686,7 @@ static inline const char *security_inode_xattr_getsuffix(void)
return security_ops->inode_xattr_getsuffix();
}
static inline int security_inode_getsecurity(struct inode *inode, const char *name, void *buffer, size_t size, int err)
static inline int security_inode_getsecurity(const struct inode *inode, const char *name, void *buffer, size_t size, int err)
{
if (unlikely (IS_PRIVATE (inode)))
return 0;
@ -2338,7 +2338,7 @@ static inline const char *security_inode_xattr_getsuffix (void)
return NULL ;
}
static inline int security_inode_getsecurity(struct inode *inode, const char *name, void *buffer, size_t size, int err)
static inline int security_inode_getsecurity(const struct inode *inode, const char *name, void *buffer, size_t size, int err)
{
return -EOPNOTSUPP;
}

21
kernel/auditsc.c
View file

@ -892,21 +892,20 @@ static void audit_log_task_context(struct audit_buffer *ab, gfp_t gfp_mask)
}
ctx = kmalloc(len, gfp_mask);
if (!ctx) {
if (!ctx)
goto error_path;
return;
}
len = security_getprocattr(current, "current", ctx, len);
if (len < 0 )
goto error_path;
audit_log_format(ab, " subj=%s", ctx);
return;
error_path:
if (ctx)
kfree(ctx);
audit_panic("security_getprocattr error in audit_log_task_context");
audit_panic("error in audit_log_task_context");
return;
}
@ -1304,13 +1303,16 @@ void audit_putname(const char *name)
void audit_inode_context(int idx, const struct inode *inode)
{
struct audit_context *context = current->audit_context;
const char *suffix = security_inode_xattr_getsuffix();
char *ctx = NULL;
int len = 0;
if (!security_inode_xattr_getsuffix())
return;
if (!suffix)
goto ret;
len = security_inode_getsecurity(inode, (char *)security_inode_xattr_getsuffix(), NULL, 0, 0);
len = security_inode_getsecurity(inode, suffix, NULL, 0, 0);
if (len == -EOPNOTSUPP)
goto ret;
if (len < 0)
goto error_path;
@ -1318,18 +1320,19 @@ void audit_inode_context(int idx, const struct inode *inode)
if (!ctx)
goto error_path;
len = security_inode_getsecurity(inode, (char *)security_inode_xattr_getsuffix(), ctx, len, 0);
len = security_inode_getsecurity(inode, suffix, ctx, len, 0);
if (len < 0)
goto error_path;
kfree(context->names[idx].ctx);
context->names[idx].ctx = ctx;
return;
goto ret;
error_path:
if (ctx)
kfree(ctx);
audit_panic("error in audit_inode_context");
ret:
return;
}

8
security/dummy.c
View file

@ -378,7 +378,7 @@ static int dummy_inode_removexattr (struct dentry *dentry, char *name)
return 0;
}
static int dummy_inode_getsecurity(struct inode *inode, const char *name, void *buffer, size_t size, int err)
static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void *buffer, size_t size, int err)
{
return -EOPNOTSUPP;
}
@ -393,6 +393,11 @@ static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t bu
return 0;
}
static const char *dummy_inode_xattr_getsuffix(void)
{
return NULL;
}
static int dummy_file_permission (struct file *file, int mask)
{
return 0;
@ -930,6 +935,7 @@ void security_fixup_ops (struct security_operations *ops)
set_to_dummy_if_null(ops, inode_getxattr);
set_to_dummy_if_null(ops, inode_listxattr);
set_to_dummy_if_null(ops, inode_removexattr);
set_to_dummy_if_null(ops, inode_xattr_getsuffix);
set_to_dummy_if_null(ops, inode_getsecurity);
set_to_dummy_if_null(ops, inode_setsecurity);
set_to_dummy_if_null(ops, inode_listsecurity);

2
security/selinux/hooks.c
View file

@ -2247,7 +2247,7 @@ static const char *selinux_inode_xattr_getsuffix(void)
*
* Permission check is handled by selinux_inode_getxattr hook.
*/
static int selinux_inode_getsecurity(struct inode *inode, const char *name, void *buffer, size_t size, int err)
static int selinux_inode_getsecurity(const struct inode *inode, const char *name, void *buffer, size_t size, int err)
{
struct inode_security_struct *isec = inode->i_security;