linux-kernel - Re: [syzbot] [net?] Internal error in sprintf (3)

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Message-ID: <CANn89iJF2TtaF3XBxGXtRQ_ek3RKSL5HWzVrb6r0PvZYVZwUUg@mail.gmail.com>
Date: Mon, 19 Aug 2024 19:15:31 +0200
From: Eric Dumazet <edumazet@...gle.com>
To: syzbot <syzbot+3c22895086835167a3ce@...kaller.appspotmail.com>
Cc: davem@...emloft.net, dsahern@...nel.org, kuba@...nel.org, 
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [net?] Internal error in sprintf (3)

On Mon, Aug 19, 2024 at 6:36 PM syzbot
<syzbot+3c22895086835167a3ce@...kaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit:    47ac09b91bef Linux 6.11-rc4
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=10f48439980000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=2b3e97716aa87b7b
> dashboard link: https://syzkaller.appspot.com/bug?extid=3c22895086835167a3ce
> compiler:       arm-linux-gnueabi-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> userspace arch: arm
>
> Unfortunately, I don't have any reproducer for this issue yet.

Stack overflow... we might simply reduce XMIT_RECURSION_LIMIT from 8 to 4 ?