linux-kernel - [PATCH] z2ram: fix a memory leak in z2

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Message-Id: <20260125134042.2061512-1-lihaoxiang@isrc.iscas.ac.cn>
Date: Sun, 25 Jan 2026 21:40:42 +0800
From: Haoxiang Li <lihaoxiang@...c.iscas.ac.cn>
To: axboe@...nel.dk
Cc: linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Haoxiang Li <lihaoxiang@...c.iscas.ac.cn>
Subject: [PATCH] z2ram: fix a memory leak in z2_open()

Add iounmap to release the memory if kmalloc_array()
fails in z2_open().

Signed-off-by: Haoxiang Li <lihaoxiang@...c.iscas.ac.cn>
---
 drivers/block/z2ram.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c
index 8c1c7f4211eb..1a38a927b8e0 100644
--- a/drivers/block/z2ram.c
+++ b/drivers/block/z2ram.c
@@ -192,6 +192,8 @@ static int z2_open(struct gendisk *disk, blk_mode_t mode)
 			if (z2ram_map == NULL) {
 				printk(KERN_ERR DEVICE_NAME
 				       ": cannot get mem for z2ram_map\n");
+				if (vaddr)
+					iounmap((void *)vaddr);
 				goto err_out;
 			}
 
-- 
2.25.1