linux-kernel - Re: KMSAN: uninit-value in batadv_bla

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Date:   Fri, 31 Jan 2020 20:22:48 +0100
From:   Sven Eckelmann <sven@...fation.org>
To:     syzbot <syzbot+37bad4f9cb2033876f32@...kaller.appspotmail.com>
Cc:     a@...table.cc, b.a.t.m.a.n@...ts.open-mesh.org,
        davem@...emloft.net, glider@...gle.com,
        linux-kernel@...r.kernel.org, mareklindner@...mailbox.ch,
        netdev@...r.kernel.org, sw@...onwunderlich.de,
        syzkaller-bugs@...glegroups.com
Subject: Re: KMSAN: uninit-value in batadv_bla_tx

On Friday, 31 January 2020 18:58:13 CET syzbot wrote:
[...]
> HEAD commit:    686a4f77 kmsan: don't compile memmove
> git tree:       https://github.com/google/kmsan.git master
> console output: https://syzkaller.appspot.com/x/log.txt?x=10b1da4ee00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=e10654781bc1f11c
> dashboard link: https://syzkaller.appspot.com/bug?extid=37bad4f9cb2033876f32
> compiler:       clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=102be0a1e00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=123105a5e00000
> 
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+37bad4f9cb2033876f32@...kaller.appspotmail.com
> 
> =====================================================
> BUG: KMSAN: uninit-value in batadv_bla_tx+0x2675/0x3730 net/batman-adv/bridge_loop_avoidance.c:1960
> CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.5.0-rc5-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[...]

Looks like the same problem in HSR as 
 https://syzkaller.appspot.com/bug?extid=24458cef7d37351dd0c3

#syz dup: KMSAN: uninit-value in batadv_interface_tx (2)

Kind regards,
	Sven
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