netdev - Re: [syzbot] [smc?] possible deadlock in smc_switch_to

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Message-ID: <683b2c31.a00a0220.d8eae.001b.GAE@google.com>
Date: Sat, 31 May 2025 09:20:01 -0700
From: syzbot <syzbot+bef85a6996d1737c1a2f@...kaller.appspotmail.com>
To: agordeev@...ux.ibm.com, alibuda@...ux.alibaba.com, davem@...emloft.net, 
	edumazet@...gle.com, guwen@...ux.alibaba.com, horms@...nel.org, 
	jaka@...ux.ibm.com, kuba@...nel.org, kuniyu@...zon.com, 
	linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org, 
	linux-s390@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, 
	syzkaller-bugs@...glegroups.com, tonylu@...ux.alibaba.com, 
	wenjia@...ux.ibm.com
Subject: Re: [syzbot] [smc?] possible deadlock in smc_switch_to_fallback (2)

syzbot suspects this issue was fixed by commit:

commit 752e2217d789be2c6a6ac66554b981cd71cd9f31
Author: Kuniyuki Iwashima <kuniyu@...zon.com>
Date:   Mon Apr 7 17:03:17 2025 +0000

    smc: Fix lockdep false-positive for IPPROTO_SMC.

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13833ed4580000
start commit:   47e55e4b410f openvswitch: fix lockup on tx to unregisterin..
git tree:       net
kernel config:  https://syzkaller.appspot.com/x/.config?x=4ef22c4fce5135b4
dashboard link: https://syzkaller.appspot.com/bug?extid=bef85a6996d1737c1a2f
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14832cb0580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17e17218580000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: smc: Fix lockdep false-positive for IPPROTO_SMC.

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