Messages in this thread Patch in this message | | | Date | Fri, 10 Feb 2012 14:29:35 -0800 | From | Greg KH <> | Subject | [patch 16/86] proc: mem_release() should check mm != NULL |
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3.2-stable review patch. If anyone has any objections, please let me know.
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From: Oleg Nesterov <oleg@redhat.com>
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>
--- fs/proc/base.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -886,8 +886,8 @@ loff_t mem_lseek(struct file *file, loff 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; }
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