linux-kernel - Re: [syzbot] [mm] KASAN: null-ptr-deref Write in sys_io_uring

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Message-ID: <6750b8fb.050a0220.17bd51.0074.GAE@google.com>
Date: Wed, 04 Dec 2024 12:18:03 -0800
From: syzbot <syzbot+092bbab7da235a02a03a@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, asml.silence@...il.com, axboe@...nel.dk, 
	io-uring@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, 
	syzkaller-bugs@...glegroups.com, tamird@...il.com, willy@...radead.org
Subject: Re: [syzbot] [mm] KASAN: null-ptr-deref Write in sys_io_uring_register

syzbot has bisected this issue to:

commit d2e88c71bdb07f1e5ccffbcc80d747ccd6144b75
Author: Tamir Duberstein <tamird@...il.com>
Date:   Tue Nov 12 19:25:37 2024 +0000

    xarray: extract helper from __xa_{insert,cmpxchg}

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17435fc0580000
start commit:   c245a7a79602 Add linux-next specific files for 20241203
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=14c35fc0580000
console output: https://syzkaller.appspot.com/x/log.txt?x=10c35fc0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=af3fe1d01b9e7b7
dashboard link: https://syzkaller.appspot.com/bug?extid=092bbab7da235a02a03a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14a448df980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15cca330580000

Reported-by: syzbot+092bbab7da235a02a03a@...kaller.appspotmail.com
Fixes: d2e88c71bdb0 ("xarray: extract helper from __xa_{insert,cmpxchg}")

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