linux-kernel - [PATCH -next v3 0/2] jffs2: fix two memory leak when mount jffs2

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Date:   Fri, 14 Jan 2022 18:28:52 +0800
From:   Baokun Li <libaokun1@...wei.com>
To:     <richard@....at>, <dwmw2@...radead.org>,
        <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC:     <libaokun1@...wei.com>, <yukuai3@...wei.com>
Subject: [PATCH -next v3 0/2] jffs2: fix two memory leak when mount jffs2

V1->V2:
	In jffs2_scan_medium,
	if s = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL);
	returns error, go to "out" to do clear. Null pointer dereference
	occurs when if (s->sum_list_head) is executed in "out".

V2->V3:
	Sorry for the noise, but there seems to be a more elegant way to
	fix the memory leak in jffs2_scan_medium. When memory allocation
	fails or CONFIG_JFFS2_SUMMARY is N, s is NULL.For the former case,
	add the new tag "out_buf" to avoid it.In the latter case,
	jffs2_sum_reset_collected is also an empty function and does nothing.

Baokun Li (2):
  jffs2: fix memory leak in jffs2_do_mount_fs
  jffs2: fix memory leak in jffs2_scan_medium

 fs/jffs2/build.c | 4 +++-
 fs/jffs2/scan.c  | 6 ++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

-- 
2.31.1