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

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Message-ID: <807c22e0-4d0d-c658-87f7-06689833e578@huawei.com>
Date:   Fri, 18 Feb 2022 14:14:16 +0800
From:   "libaokun (A)" <libaokun1@...wei.com>
To:     <richard@....at>, <dwmw2@...radead.org>,
        <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC:     <yukuai3@...wei.com>, Baokun Li <libaokun1@...wei.com>
Subject: Re: [PATCH -next v3 0/2] jffs2: fix two memory leak when mount jffs2

在 2022/1/14 18:28, Baokun Li 写道:

ping

> 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(-)
>