diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2012-01-31 17:14:38 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-13 11:06:05 -0800 |
| commit | 401f63716ca0bca1728e55ccf2132fb3785cf5da (patch) | |
| tree | 96fc7f31c483fe96a2c6d283c6602dcd75212ecb /fs | |
| parent | 344d390bcb4c796b4b7797395cfc07e2c43d935d (diff) | |
| download | lwn-401f63716ca0bca1728e55ccf2132fb3785cf5da.tar.gz lwn-401f63716ca0bca1728e55ccf2132fb3785cf5da.zip | |
proc: mem_release() should check mm != NULL
commit 71879d3cb3dd8f2dfdefb252775c1b3ea04a3dd4 upstream.
mem_release() can hit mm == NULL, add the necessary check.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/proc/base.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 7b28f27ad80b..b3e298f29421 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -886,8 +886,8 @@ loff_t mem_lseek(struct file *file, loff_t offset, int orig) static int mem_release(struct inode *inode, struct file *file) { struct mm_struct *mm = file->private_data; - - mmput(mm); + if (mm) + mmput(mm); return 0; } |