linux-kernel - [PATCH] quota: Check for register

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1511962490-3771-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp>
Date:   Wed, 29 Nov 2017 22:34:50 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:     linux-kernel@...r.kernel.org
Cc:     Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Jan Kara <jack@...e.com>, Michal Hocko <mhocko@...e.com>
Subject: [PATCH] quota: Check for register_shrinker() failure.

register_shrinker() might return -ENOMEM error since Linux 3.12.
Call panic() as with other failure checks in this function if
register_shrinker() failed.

Signed-off-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc: Jan Kara <jack@...e.com>
Cc: Michal Hocko <mhocko@...e.com>
---
 fs/quota/dquot.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 39f1b0b..1429f03 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -2985,7 +2985,8 @@ static int __init dquot_init(void)
 	pr_info("VFS: Dquot-cache hash table entries: %ld (order %ld,"
 		" %ld bytes)\n", nr_hash, order, (PAGE_SIZE << order));
 
-	register_shrinker(&dqcache_shrinker);
+	if (register_shrinker(&dqcache_shrinker))
+		panic("Cannot register dquot shrinker");
 
 	return 0;
 }
-- 
1.8.3.1