From: Jens Axboe <axboe@kernel.dk>
To: syzbot <syzbot+b1647099e82b3b349fbf@syzkaller.appspotmail.com>,
asml.silence@gmail.com, io-uring@vger.kernel.org,
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [io-uring?] KMSAN: uninit-value in io_issue_sqe
Date: Thu, 30 May 2024 14:07:24 -0600 [thread overview]
Message-ID: <f8299b20-dd92-47c3-bfc5-071f3278eacb@kernel.dk> (raw)
In-Reply-To: <000000000000ae186106196f6894@google.com>
On 5/27/24 7:22 AM, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 614da38e2f7a Merge tag 'hid-for-linus-2024051401' of git:/..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=11b9b972980000
> kernel config: https://syzkaller.appspot.com/x/.config?x=f5d2cbf33633f507
> dashboard link: https://syzkaller.appspot.com/bug?extid=b1647099e82b3b349fbf
> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
>
> Unfortunately, I don't have any reproducer for this issue yet.
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/89eafb874b71/disk-614da38e.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/356000512ad9/vmlinux-614da38e.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/839c73939115/bzImage-614da38e.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+b1647099e82b3b349fbf@syzkaller.appspotmail.com
>
> =====================================================
> BUG: KMSAN: uninit-value in io_req_cqe_overflow io_uring/io_uring.c:810 [inline]
> BUG: KMSAN: uninit-value in io_req_complete_post io_uring/io_uring.c:937 [inline]
> BUG: KMSAN: uninit-value in io_issue_sqe+0x1f1b/0x22c0 io_uring/io_uring.c:1763
Should be fixed by:
https://lore.kernel.org/io-uring/c52d9b19-7fd7-4fb1-b396-632b9f0f612d@kernel.dk/
#syz fix: io_uring/net: assign kmsg inq/flags before buffer selection
--
Jens Axboe
prev parent reply other threads:[~2024-05-30 20:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-27 13:22 syzbot
2024-05-30 20:07 ` Jens Axboe [this message]
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