fs: use rlimit helpers
Make sure compiler won't do weird things with limits. E.g. fetching them
twice may return 2 different values after writable limits are implemented.
I.e. either use rlimit helpers added in commit 3e10e716ab
("resource:
add helpers for fetching rlimits") or ACCESS_ONCE if not applicable.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
221e3ebf6d
commit
d554ed895d
8 changed files with 12 additions and 12 deletions
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@ -81,7 +81,7 @@ int inode_newsize_ok(const struct inode *inode, loff_t offset)
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if (inode->i_size < offset) {
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if (inode->i_size < offset) {
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unsigned long limit;
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unsigned long limit;
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limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
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limit = rlimit(RLIMIT_FSIZE);
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if (limit != RLIM_INFINITY && offset > limit)
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if (limit != RLIM_INFINITY && offset > limit)
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goto out_sig;
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goto out_sig;
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if (offset > inode->i_sb->s_maxbytes)
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if (offset > inode->i_sb->s_maxbytes)
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@ -247,7 +247,7 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
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* size limits imposed on them by creating programs with large
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* size limits imposed on them by creating programs with large
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* arrays in the data or bss.
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* arrays in the data or bss.
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*/
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*/
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rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
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rlim = rlimit(RLIMIT_DATA);
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if (rlim >= RLIM_INFINITY)
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if (rlim >= RLIM_INFINITY)
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rlim = ~0;
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rlim = ~0;
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if (ex.a_data + ex.a_bss > rlim)
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if (ex.a_data + ex.a_bss > rlim)
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@ -501,7 +501,7 @@ static int load_flat_file(struct linux_binprm * bprm,
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* size limits imposed on them by creating programs with large
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* size limits imposed on them by creating programs with large
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* arrays in the data or bss.
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* arrays in the data or bss.
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*/
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*/
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rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
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rlim = rlimit(RLIMIT_DATA);
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if (rlim >= RLIM_INFINITY)
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if (rlim >= RLIM_INFINITY)
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rlim = ~0;
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rlim = ~0;
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if (data_len + bss_len > rlim) {
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if (data_len + bss_len > rlim) {
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@ -195,7 +195,7 @@ static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos,
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* to work from.
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* to work from.
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*/
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*/
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rlim = current->signal->rlim;
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rlim = current->signal->rlim;
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if (size > rlim[RLIMIT_STACK].rlim_cur / 4) {
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if (size > ACCESS_ONCE(rlim[RLIMIT_STACK].rlim_cur) / 4) {
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put_page(page);
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put_page(page);
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return NULL;
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return NULL;
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}
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}
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@ -579,7 +579,7 @@ int setup_arg_pages(struct linux_binprm *bprm,
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#ifdef CONFIG_STACK_GROWSUP
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#ifdef CONFIG_STACK_GROWSUP
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/* Limit stack size to 1GB */
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/* Limit stack size to 1GB */
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stack_base = current->signal->rlim[RLIMIT_STACK].rlim_max;
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stack_base = rlimit_max(RLIMIT_STACK);
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if (stack_base > (1 << 30))
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if (stack_base > (1 << 30))
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stack_base = 1 << 30;
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stack_base = 1 << 30;
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@ -1535,7 +1535,7 @@ static int format_corename(char *corename, long signr)
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/* core limit size */
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/* core limit size */
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case 'c':
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case 'c':
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rc = snprintf(out_ptr, out_end - out_ptr,
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rc = snprintf(out_ptr, out_end - out_ptr,
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"%lu", current->signal->rlim[RLIMIT_CORE].rlim_cur);
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"%lu", rlimit(RLIMIT_CORE));
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if (rc > out_end - out_ptr)
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if (rc > out_end - out_ptr)
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goto out;
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goto out;
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out_ptr += rc;
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out_ptr += rc;
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@ -1800,7 +1800,7 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs)
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struct coredump_params cprm = {
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struct coredump_params cprm = {
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.signr = signr,
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.signr = signr,
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.regs = regs,
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.regs = regs,
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.limit = current->signal->rlim[RLIMIT_CORE].rlim_cur,
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.limit = rlimit(RLIMIT_CORE),
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};
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};
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audit_core_dumps(signr);
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audit_core_dumps(signr);
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@ -344,7 +344,7 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
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switch (cmd) {
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switch (cmd) {
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case F_DUPFD:
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case F_DUPFD:
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case F_DUPFD_CLOEXEC:
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case F_DUPFD_CLOEXEC:
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if (arg >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
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if (arg >= rlimit(RLIMIT_NOFILE))
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break;
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break;
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err = alloc_fd(arg, cmd == F_DUPFD_CLOEXEC ? O_CLOEXEC : 0);
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err = alloc_fd(arg, cmd == F_DUPFD_CLOEXEC ? O_CLOEXEC : 0);
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if (err >= 0) {
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if (err >= 0) {
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@ -257,7 +257,7 @@ int expand_files(struct files_struct *files, int nr)
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* N.B. For clone tasks sharing a files structure, this test
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* N.B. For clone tasks sharing a files structure, this test
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* will limit the total number of files that can be opened.
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* will limit the total number of files that can be opened.
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*/
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*/
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if (nr >= current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
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if (nr >= rlimit(RLIMIT_NOFILE))
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return -EMFILE;
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return -EMFILE;
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/* Do we need to expand? */
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/* Do we need to expand? */
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@ -273,7 +273,7 @@ static inline void task_sig(struct seq_file *m, struct task_struct *p)
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rcu_read_lock(); /* FIXME: is this correct? */
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rcu_read_lock(); /* FIXME: is this correct? */
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qsize = atomic_read(&__task_cred(p)->user->sigpending);
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qsize = atomic_read(&__task_cred(p)->user->sigpending);
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rcu_read_unlock();
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rcu_read_unlock();
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qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
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qlim = task_rlimit(p, RLIMIT_SIGPENDING);
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unlock_task_sighand(p, &flags);
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unlock_task_sighand(p, &flags);
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}
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}
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@ -420,7 +420,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
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cutime = sig->cutime;
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cutime = sig->cutime;
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cstime = sig->cstime;
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cstime = sig->cstime;
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cgtime = sig->cgtime;
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cgtime = sig->cgtime;
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rsslim = sig->rlim[RLIMIT_RSS].rlim_cur;
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rsslim = ACCESS_ONCE(sig->rlim[RLIMIT_RSS].rlim_cur);
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/* add up live thread stats at the group level */
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/* add up live thread stats at the group level */
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if (whole) {
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if (whole) {
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@ -821,7 +821,7 @@ int do_sys_poll(struct pollfd __user *ufds, unsigned int nfds,
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struct poll_list *walk = head;
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struct poll_list *walk = head;
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unsigned long todo = nfds;
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unsigned long todo = nfds;
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if (nfds > current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
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if (nfds > rlimit(RLIMIT_NOFILE))
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return -EINVAL;
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return -EINVAL;
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len = min_t(unsigned int, nfds, N_STACK_PPS);
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len = min_t(unsigned int, nfds, N_STACK_PPS);
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