linux-kernel - Re: [syzbot] memory leak in netlink_policy_dump_add

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Date:   Fri, 12 Aug 2022 14:04:39 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     syzbot <syzbot+dc54d9ba8153b216cae0@...kaller.appspotmail.com>
Cc:     davem@...emloft.net, edumazet@...gle.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        pabeni@...hat.com, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] memory leak in netlink_policy_dump_add_policy

On Fri, 12 Aug 2022 10:04:26 -0700 syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    4e23eeebb2e5 Merge tag 'bitmap-6.0-rc1' of https://github...
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=165f4f6a080000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=3a433c7a2539f51c
> dashboard link: https://syzkaller.appspot.com/bug?extid=dc54d9ba8153b216cae0
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1443be71080000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11e5918e080000
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+dc54d9ba8153b216cae0@...kaller.appspotmail.com

Let's see if attaching a patch works...

#syz test

View attachment "0001-net-genl-fix-error-path-memory-leak-in-policy-dumpin.patch" of type "text/x-patch" (1182 bytes)