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 diff --git a/fs/proc/base.c b/fs/proc/base.c index 9cde9edf..c3617ea 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 v0.10.2