linux-kernel - [PATCH] zram: fixup "introduce writeback bio batching support"

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>] [day] [month] [year] [list]

Message-ID: <20251119094715.2447022-1-senozhatsky@chromium.org>
Date: Wed, 19 Nov 2025 18:46:53 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Minchan Kim <minchan@...nel.org>,
	Yuwen Chen <ywen.chen@...mail.com>,
	Richard Chang <richardycc@...gle.com>,
	Brian Geffon <bgeffon@...gle.com>,
	Fengyu Lian <licayy@...look.com>,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-block@...r.kernel.org,
	Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: [PATCH] zram: fixup "introduce writeback bio batching support"

Dan Carpenter reported a missing NULL check.

Signed-off-by: Sergey Senozhatsky <senozhatsky@...omium.org>
---
 drivers/block/zram/zram_drv.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index ea06f4d7b623..61b30c671a56 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -760,6 +760,9 @@ static void release_wb_req(struct zram_wb_req *req)
 
 static void release_wb_ctl(struct zram_wb_ctl *wb_ctl)
 {
+	if (!wb_ctl)
+		return;
+
 	/* We should never have inflight requests at this point */
 	WARN_ON(!list_empty(&wb_ctl->inflight_reqs));
 
-- 
2.52.0.rc1.455.g30608eb744-goog