From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi2-f5.google.com (mail-oi2-f5.google.com [74.125.231.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3EF0D313E38 for ; Sat, 29 Aug 2026 05:31:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787981489; cv=none; b=a6tR1kcnPFXCqeMjnSz5On1MI0dRPAqNGFz7nRz8u++rqrn/szUrfF++WU2u0thqZjpRZnGXAst4rFQqUfDsfP8TcHzetSOQurI19SDsV4TTVn618rXhfUWEx7tB1Jm8iJc7LaeH07sJnhKuMf0arHj3HCW+HJBXsdnAs2bLtUM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787981489; c=relaxed/simple; bh=J63cCjU7NQMqNc4BYfZxkPvygTtwZPK/s48tuhKYo9w=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Tf37BbdFrAxK4bgyxfsZTRt5JcNIIFS4/nqf1oRyCJwOGR3ntu8tr2T2Ddkfmpaa2/exJQxvBC1FhBjzS7svjZraa5qtd/7qVTdpVGK1XrXzrFh7RPocqk6oEnn9JY3Lrp4E2Etafc1ryKb4nUcSKj2zz0/YnBSZYGYXl3mljSw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=74.125.231.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi2-f5.google.com with SMTP id 5614622812f47-4b385b9c4e8so614498b6e.0 for ; Fri, 28 Aug 2026 22:31:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787981487; x=1788586287; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=IUjmvQ8X6s/JHGzOzsHlequ1pScp7s06KOL9eRF58EU=; b=mhCMwHrwfkutzfMb1g0kwJzH9BgJ15v1Mlpnz6JakJgVddfN58ga+VeYD+69Xo6O78 kBh4H0DhFNfrR1vhlWwx4RuMIRNvMT1SDfX8waCKfZBDAPgsjO/yWUFvz+yKse5/wbjU fUh4/fItZm9x5YphXo9KQV6rTWXkJTOymJTAeJA4NXXyc6W/IACoaU1rhuBkzA9p4Xgj nIZdLVi6NTqlpdIkBLHEZ9NvOuWjgA7obqc9uyYZ8r+zIjOM9DW/Nppj1QxFsk8wPOcT 2V9sYPXz3ZwsXrNiC/OSN3qVv8/yYBKm4LhtlkwchyGtLsGcWFqjG2nj9qkp4ndICs+Y UFfg== X-Forwarded-Encrypted: i=1; AHgh+Ro/3xYC9pJJbQqDzEd0p093hOLRsY8igmdQk71KG0NVqo2vE5VMdrOzvCHqVTYVHArqXfvyqGxUEoUitEI=@vger.kernel.org X-Gm-Message-State: AFuF++nxyEn3Izh14WQlELsd+S+gVhpXR9OI6sFXiE0brALskTIXCfg9 fMrRGGWqDhkeks9PttF4tOoDxUrTXQTrM34xevfX4NVvgc5yWFs1aAEP8ltnLCEe7H9YwKlaq4N +TtlxwdDS0mnUxFVAlEGm+094ihWBj1SCoZwZu6qbIrQgFiGs4XhkyA3BKaE= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:c1ad:b0:495:f8a6:81f8 with SMTP id 5614622812f47-4b3981e5467mr14147676b6e.13.1787981487283; Fri, 28 Aug 2026 22:31:27 -0700 (PDT) Date: Fri, 28 Aug 2026 22:31:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a926eaf.1d9ded08.62e62.0102.GAE@google.com> Subject: [syzbot] [block?] BUG: corrupted list in blk_mq_request_bypass_insert From: syzbot To: axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f1b8fa82cab7 Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=14f18379580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d1128bc53f2ef7f3 dashboard link: https://syzkaller.appspot.com/bug?extid=f4353e96f7004ae5a09e compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/932d85a2bda2/disk-f1b8fa82.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5b6b8fb76e8d/vmlinux-f1b8fa82.xz kernel image: https://storage.googleapis.com/syzbot-assets/c246b61ee396/Image-f1b8fa82.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f4353e96f7004ae5a09e@syzkaller.appspotmail.com non-slab/vmalloc memory list_add corruption. prev->next should be next (ffff0000c8a39040), but was ffff0000c8ab0e48. (prev=ffff0000c8ab0e48). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:34! Internal error: Oops - BUG: 00000000f2000800 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 4390 Comm: kworker/0:1H Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 Workqueue: kblockd blk_mq_requeue_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __list_add_valid_or_report+0x144/0x148 lib/list_debug.c:32 lr : __list_add_valid_or_report+0x144/0x148 lib/list_debug.c:32 sp : ffff8000947079f0 x29: ffff8000947079f0 x28: ffff800094707aa8 x27: ffff800094707aa0 x26: 1fffe00019147209 x25: ffff0000c8a39040 x24: ffff0000c8a39048 x23: 1fffe000191561c9 x22: dfff800000000000 x21: ffff0000c8ab0e48 x20: ffff0000c8ab0e48 x19: ffff0000c8a39040 x18: 1fffe00034bb7428 x17: 3034303933613863 x16: 3030303066666666 x15: 28207478656e2065 x14: 6220646c756f6873 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000002 x9 : d55a73c626cee600 x8 : d55a73c626cee600 x7 : ffff80008048c60c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80008049731c x2 : 0000000100000001 x1 : ffff0000c56f3a80 x0 : 0000000000000075 Call trace: __list_add_valid_or_report+0x144/0x148 lib/list_debug.c:32 (P) __list_add_valid include/linux/list.h:96 [inline] __list_add include/linux/list.h:158 [inline] list_add_tail include/linux/list.h:191 [inline] blk_mq_request_bypass_insert+0x130/0x1cc block/blk-mq.c:2551 blk_mq_requeue_work+0x3a4/0x52c block/blk-mq.c:1560 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 Code: 91270000 aa1303e1 aa1403e3 979c2c73 (d4210000) ---[ end trace 0000000000000000 ]--- --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup