From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo2-f11.google.com (mail-oo2-f11.google.com [74.125.231.139]) (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 D28BF386423 for ; Tue, 15 Sep 2026 01:33:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.139 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789436017; cv=none; b=VjKhCh5zDfU8p83P+3bMC/P4IPTzCtY/6vcKSiMWlno7HNmMPGQu57EtSDRmYOTWwN5/D6JxXNimePsYh2mz+Wp1V9LZY7FJIDS3EFQG/dWt7g5W+RaJNnjyyGpUy8zghhU9A70Ugw8zxQro/96yInzcp2lq6x4CasKj8KvBuX8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789436017; c=relaxed/simple; bh=cfKk5FoxDTMqLNBEB4oPfs+wb8JELser8oC7VI8XvkQ=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=H3lugme7yLhpRcIWCDGIMCzneyj0j9BtfZrsLIsuT2/fxGmWC66HdgApIoZxMeErqC8HY8yn6PJo9x62lvT3wEVVNLXsTjMbg+mah6lfVczTbf40DGGKzrYcXfbjJSaTPfeh/nU0KK5tPt9W3V0lZQch/Wkiw4UKYfapn6NnjrU= 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=74.125.231.139 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-oo2-f11.google.com with SMTP id 46e09a7af769-7f4ddb9adf4so1578475a34.1 for ; Mon, 14 Sep 2026 18:33:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789436013; x=1790040813; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=Y1RMj3nj6Oa60Do6JMC79RJ4/ktrXyj0vc2+aB9ZeLw=; b=2uiK9B0rbvD2hctu3ufMnNi4vnnsPKpeSb3LfoK81eln3emLYIZl93SmG7/yq/8UO8 RrmENKEizxD3DANTkpPIlyOC0HueK0OE4TqHyUuKdYkGIUJVBz/6kC9T5lgaajJoqZqT 8Wkxo9UDAXRWIGUxBf3bSiqe7uuKdkKl2xs9v9l8WJSnR8JDVniuSdr5Q0FVdJuUSyzC 49atuVpvQIVujDrUEtu6h8lzXSNFpqjb5p+ITMPUfZ3BXEImSpXTnpjhY4tVyYmBU3HR Ds/vjw87Xuzrx3a6CTd0BZC1Uvhw5+wLYM1PLH95DIppyHnbbprvF6EN4SHTygJbPxMd 7TCQ== X-Forwarded-Encrypted: i=1; AKwUvBxD/b5yc+9x9ZkW28DHkxmaSwJRHM0zK8FdH/7XJvUp/qdDJpSW9T+F9Jcup5SwBoVsXpZYoRQ/p+7Ucxk=@vger.kernel.org X-Gm-Message-State: AFuF++kEFdRFijU+k/cdI0dnd0c1focXEyclMbalsnqraA9uE3godzi5 C43584DLRSayvqvDpy98Oi95uHTYfCbl1/avEGfuF5XhzVow+FiD73F0Vfq6HDtNW0TBekDhVzC /165lktAoP9IlVSgEe5wWBxkm/t3W905ygweuSZPfPmic+ooWhrn2wuOa5B8= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1c99:b0:6b7:83c5:fde9 with SMTP id 006d021491bc7-6c5447a22b4mr2757507eaf.42.1789436013716; Mon, 14 Sep 2026 18:33:33 -0700 (PDT) Date: Mon, 14 Sep 2026 18:33:33 -0700 In-Reply-To: <6a926eaf.1d9ded08.62e62.0102.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aa8a06d.4c28b7d0.c1bba.0027.GAE@google.com> Subject: Re: [syzbot] [block?] BUG: corrupted list in blk_mq_request_bypass_insert From: syzbot To: axboe@kernel.dk, bvanassche@acm.org, hch@lst.de, kbusch@kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 5445d6419962 arm64: Don't read GMID_EL1 when MTE is disabled 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=121f2115580000 kernel config: https://syzkaller.appspot.com/x/.config?x=56ed23170c168d4c 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 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=161f2115580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=110a75f9580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e8b70e3bd109/disk-5445d641.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e5227e56ac93/vmlinux-5445d641.xz kernel image: https://storage.googleapis.com/syzbot-assets/54905f78be59/Image-5445d641.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 (ffff0000c7fc2840), but was ffff0000c83b0048. (prev=ffff0000c83b0048). ------------[ 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: 4354 Comm: kworker/0:1H Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 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 : ffff800094547a10 x29: ffff800094547a10 x28: ffff800094547ac8 x27: ffff800094547ac0 x26: 1fffe00018ff8509 x25: ffff0000c7fc2840 x24: ffff0000c7fc2848 x23: 1fffe00019076009 x22: dfff800000000000 x21: ffff0000c83b0048 x20: ffff0000c83b0048 x19: ffff0000c7fc2840 x18: 1fffe00035b9ec28 x17: 3034383263663763 x16: 3030303066666666 x15: 28207478656e2065 x14: 6220646c756f6873 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000002 x9 : 1fe110670cc49300 x8 : 1fe110670cc49300 x7 : ffff80008048e314 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080498f8c x2 : 0000000100000001 x1 : ffff0000d6353b00 x0 : 0000000000000075 Call trace: __list_add_valid_or_report+0x144/0x148 lib/list_debug.c:32 (P) __list_add_valid include/linux/list.h:104 [inline] __list_add include/linux/list.h:169 [inline] list_add_tail include/linux/list.h:206 [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:3387 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3470 worker_thread+0x798/0xbd0 kernel/workqueue.c:3551 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 Code: 91170000 aa1303e1 aa1403e3 979ab1d1 (d4210000) ---[ end trace 0000000000000000 ]--- --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.