linux-kernel - Re: [syzbot] [net?] KASAN: slab-use-after-free Read in __ethtool_get_link

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Message-ID: <67048e62.050a0220.49194.051e.GAE@google.com>
Date: Mon, 07 Oct 2024 18:44:02 -0700
From: syzbot <syzbot+5fe14f2ff4ccbace9a26@...kaller.appspotmail.com>
To: ahmed.zaki@...el.com, andrew@...n.ch, boqun.feng@...il.com, 
	cmeiohas@...dia.com, davem@...emloft.net, dkirjanov@...e.de, 
	ecree.xilinx@...il.com, edumazet@...gle.com, hdanton@...a.com, jgg@...pe.ca, 
	kalesh-anakkur.purayil@...adcom.com, kirjanov@...il.com, kuba@...nel.org, 
	leon@...nel.org, linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org, 
	michaelgur@...dia.com, msanalla@...dia.com, naveenm@...vell.com, 
	netdev@...r.kernel.org, pabeni@...hat.com, penguin-kernel@...ove.sakura.ne.jp, 
	przemyslaw.kitszel@...el.com, rkannoth@...vell.com, 
	syzkaller-bugs@...glegroups.com, torvalds@...ux-foundation.org
Subject: Re: [syzbot] [net?] KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings

syzbot has bisected this issue to:

commit 5f8ca04fdd3c66a322ea318b5f1cb684dd56e5b2
Author: Chiara Meiohas <cmeiohas@...dia.com>
Date:   Mon Sep 9 17:30:22 2024 +0000

    RDMA/device: Remove optimization in ib_device_get_netdev()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16db2327980000
start commit:   c4a14f6d9d17 ipv4: ip_gre: Fix drops of small packets in i..
git tree:       net
final oops:     https://syzkaller.appspot.com/x/report.txt?x=15db2327980000
console output: https://syzkaller.appspot.com/x/log.txt?x=11db2327980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b2d4fdf18a83ec0b
dashboard link: https://syzkaller.appspot.com/bug?extid=5fe14f2ff4ccbace9a26
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11eca3d0580000

Reported-by: syzbot+5fe14f2ff4ccbace9a26@...kaller.appspotmail.com
Fixes: 5f8ca04fdd3c ("RDMA/device: Remove optimization in ib_device_get_netdev()")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection