linux-kernel - [PATCH] mm/shmem.c: Fix the missing unaccount on the failed path

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Date:   Mon, 21 Sep 2020 00:30:05 +0800
From:   Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
To:     Hugh Dickins <hughd@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Al Viro <viro@...iv.linux.org.uk>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
Subject: [PATCH] mm/shmem.c: Fix the missing unaccount on the failed path

In function __shmem_file_setup(), shmem_unacct_size() is forgotten
on the failed path, so add it.

Fixes: 93dec2da7b234 ("... and switch shmem_file_setup() to alloc_file_pseudo()")
Cc: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
---
 mm/shmem.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 8e2b35ba93ad..591410dc3541 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4200,8 +4200,10 @@ static struct file *__shmem_file_setup(struct vfsmount *mnt, const char *name, l
 	if (!IS_ERR(res))
 		res = alloc_file_pseudo(inode, mnt, name, O_RDWR,
 				&shmem_file_operations);
-	if (IS_ERR(res))
+	if (IS_ERR(res)) {
 		iput(inode);
+		shmem_unacct_size(flags, size);
+	}
 	return res;
 }
 
-- 
2.19.1.3.ge56e4f7