From 71879d3cb3dd8f2dfdefb252775c1b3ea04a3dd4 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Tue, 31 Jan 2012 17:14:38 +0100 Subject: proc: mem_release() should check mm != NULL mem_release() can hit mm == NULL, add the necessary check. Cc: stable@kernel.org Signed-off-by: Oleg Nesterov Signed-off-by: Linus Torvalds --- fs/proc/base.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/proc/base.c') diff --git a/fs/proc/base.c b/fs/proc/base.c index 9cde9edf9c4d..c3617ea7830b 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -822,8 +822,8 @@ 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; } -- cgit v1.2.3