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cred_guard_mutex: do not return -EINTR to user-space

Browse source 
do_execve() and ptrace_attach() return -EINTR if
mutex_lock_interruptible(->cred_guard_mutex) fails.

This is not right, change the code to return ERESTARTNOINTR.

Perhaps we should also change proc_pid_attr_write().

Signed-off-by: Oleg Nesterov <[email protected]>
Cc: David Howells <[email protected]>
Acked-by: Roland McGrath <[email protected]>
Cc: James Morris <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Oleg Nesterov 2009-07-05 12:08:26 -07:00 • committed by Linus Torvalds
commit 793285fcaf
3 changed files with 6 additions and 6 deletions
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4
fs/compat.c
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@ -1486,8 +1486,8 @@ int compat_do_execve(char * filename,
if (!bprm)
goto out_files;
retval = mutex_lock_interruptible(&current->cred_guard_mutex);
if (retval < 0)
retval = -ERESTARTNOINTR;
if (mutex_lock_interruptible(&current->cred_guard_mutex))
goto out_free;
current->in_execve = 1;