linux-kernel - Re: [syzbot] [io-uring?] KASAN: null-ptr-deref Read in io_sqe_buffer

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Message-ID: <68babfe5.a00a0220.eb3d.0011.GAE@google.com>
Date: Fri, 05 Sep 2025 03:48:05 -0700
From: syzbot <syzbot+1ab243d3eebb2aabf4a4@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, axboe@...nel.dk, david@...hat.com, 
	io-uring@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [io-uring?] KASAN: null-ptr-deref Read in io_sqe_buffer_register

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+1ab243d3eebb2aabf4a4@...kaller.appspotmail.com
Tested-by: syzbot+1ab243d3eebb2aabf4a4@...kaller.appspotmail.com

Tested on:

commit:         bfd07c99 fixup: mm/gup: remove record_subpages()
git tree:       https://github.com/davidhildenbrand/linux.git nth_page
console output: https://syzkaller.appspot.com/x/log.txt?x=15a5a134580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=366a4ffc91f4ab4
dashboard link: https://syzkaller.appspot.com/bug?extid=1ab243d3eebb2aabf4a4
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.