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| author | Oleg Nesterov <oleg@redhat.com> | 2009-07-05 12:08:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-07-06 13:57:04 -0700 |
| commit | 793285fcafce4719a05e0c99fa74b188157fe7fe (patch) | |
| tree | 3395530c1d4e604beac506c703b3093bb13f23ee | |
| parent | 82e3310ace59794ecf0f531eca94647b2863dfda (diff) | |
| download | kernel-common-793285fcafce4719a05e0c99fa74b188157fe7fe.tar.gz kernel-common-793285fcafce4719a05e0c99fa74b188157fe7fe.tar.bz2 kernel-common-793285fcafce4719a05e0c99fa74b188157fe7fe.zip | |
cred_guard_mutex: do not return -EINTR to user-space
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 <oleg@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/compat.c | 4 | ||||
| -rw-r--r-- | fs/exec.c | 4 | ||||
| -rw-r--r-- | kernel/ptrace.c | 4 |
3 files changed, 6 insertions, 6 deletions
diff --git a/fs/compat.c b/fs/compat.c index cdd51a3a7c53..fbadb947727b 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -1486,8 +1486,8 @@ int compat_do_execve(char * filename, if (!bprm) goto out_files; - retval = mutex_lock_interruptible(¤t->cred_guard_mutex); - if (retval < 0) + retval = -ERESTARTNOINTR; + if (mutex_lock_interruptible(¤t->cred_guard_mutex)) goto out_free; current->in_execve = 1; diff --git a/fs/exec.c b/fs/exec.c index e639957d7a57..4a8849e45b21 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1277,8 +1277,8 @@ int do_execve(char * filename, if (!bprm) goto out_files; - retval = mutex_lock_interruptible(¤t->cred_guard_mutex); - if (retval < 0) + retval = -ERESTARTNOINTR; + if (mutex_lock_interruptible(¤t->cred_guard_mutex)) goto out_free; current->in_execve = 1; diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 61c78b2c07ba..082c320e4dbf 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -181,8 +181,8 @@ int ptrace_attach(struct task_struct *task) * interference; SUID, SGID and LSM creds get determined differently * under ptrace. */ - retval = mutex_lock_interruptible(&task->cred_guard_mutex); - if (retval < 0) + retval = -ERESTARTNOINTR; + if (mutex_lock_interruptible(&task->cred_guard_mutex)) goto out; task_lock(task); |