From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f69.google.com (mail-ot1-f69.google.com [209.85.210.69]) (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 D679852B1C4 for ; Wed, 9 Sep 2026 11:27:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788953250; cv=none; b=srjx/3mAXYY+tOakTwNWcRuKjSXrlX5j2Wein4AnmwTK9vGj2tZD1rxL2Kp7Qx3wv6lamheJixDHrfP7qxA5+wuj3VylX3GbwV3et8pQGOsP4FxE8y1Fr8qiDekJQnGSCZk5qzJEyE+Nuha897BzzBGt8r66u1x66CNet1ukqr0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788953250; c=relaxed/simple; bh=w9ltMKPC7FxIL2LdZjYaFQY9LYuMDWYBPJFCSHRx4Es=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=F+0a4yhRefG2WV5g/sen4jOr/rCiBYRPw3RCDqLw7DgU5kEbbSAqYKXnqYmMT+Y4gcHmG2O7tRL//DXYndKjNSE+lHJCtaRpB/PhQqiZG4N1iPM7Q6YSOzsDss9Sd5tdhMacJ6LBe4/wLye4PCQcKiKZhhSVvkjX+XMxyhiV0Q8= 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=209.85.210.69 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-ot1-f69.google.com with SMTP id 46e09a7af769-7f94a2da216so7387897a34.1 for ; Wed, 09 Sep 2026 04:27:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788953248; x=1789558048; 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=f1CvJn7NYjTtkQkEwkFRULKmMA7w0g21i7peffLilg8=; b=fiKSG4rxoBIdSFWyfS4bvznM4eCA6tBWp0xw7dyZZml3RqqDe/ojbaX8B4QB0gPLpT sP1TfcE6DzC0Ko9EZGCrEpfDuk3SzQHwmolPAJpGUT9KMkZLeMUTe2VAjWDLu2nsn2rC NeD7k9/wmCU855OUdE6cNiqdCaI/kVdgq9QIpn2xxKdHCL72COqiKmww8+KZBiyc/Wek tPRtuu0+wIXRxodxei76ydeBbE/hGcQwA7KPMWr91aLc+V0F/dopcE8KCykAFLyfucsw CAA3ZVDAywu15eXorEx+kudAIlA4y7TqdMoTWdJ6VMoyiPesZuXoAILWJvsQgeFECQKe T67Q== X-Gm-Message-State: AFuF++lN+zOQNfAYqLKDiU+P+4ooDjx7K0mInqG36Tx8Z+OFYMF0L//r uMAiFpyrQFHJOp1dq6tNZIpLqqLQT8Smi8uao9cQxib8cnJ+tgvf2kwKcr4j2fJhyVR61e+JFD3 +BqDwn3pFaDYe2K8zsP1fj4ck5Alw1JjLHi6wANdgxs/bTpMGZ9fbyv0+Ssc= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:200f:b0:6b9:7d9e:5708 with SMTP id 006d021491bc7-6bdc949e3b9mr5591427eaf.3.1788953247713; Wed, 09 Sep 2026 04:27:27 -0700 (PDT) Date: Wed, 09 Sep 2026 04:27:27 -0700 In-Reply-To: <6aa12989.f2639fcc.29487d.0000.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aa1429f.6e6c5f9e.28f11f.0024.GAE@google.com> Subject: Re: [syzbot] [raid?] kernel BUG in raid5_run From: syzbot To: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, magiclinan@didiglobal.com, song@kernel.org, syzkaller-bugs@googlegroups.com, xiao@kernel.org, yukuai@fnnas.com, yukuai@fygo.io Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 5acbae5f7eb3 Merge tag 'powerpc-7.3-2' of git://git.kernel.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=1574d749580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8c5c3949d762a91f dashboard link: https://syzkaller.appspot.com/bug?extid=1f5a7de91d547763f4c8 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1774d749580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1f5a7de91d547763f4c8@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at drivers/md/raid5.c:8117! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 2 UID: 0 PID: 6026 Comm: syz-executor387 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:raid5_run+0x11a7/0x1670 drivers/md/raid5.c:8117 Code: 03 00 00 41 8b ae d0 01 00 00 31 ff 89 ee e8 f0 f6 82 f9 48 c7 44 24 10 00 00 00 00 85 ed 0f 84 44 f4 ff ff e8 6a fc 82 f9 90 <0f> 0b e8 62 fc 82 f9 49 8d 86 e0 00 00 00 48 89 c2 48 89 44 24 60 RSP: 0018:ffffc90003c879f8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88802bdb2580 RSI: ffffffff888914a6 RDI: ffff88802bdb2580 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000008 R13: 0000000000000000 R14: ffff88802cfb0000 R15: ffff88802cfb0028 FS: 00005555884d2400(0000) GS:ffff8880d5d5d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff95c66058 CR3: 000000005631b000 CR4: 0000000000352ef0 Call Trace: md_run+0xc2f/0x2510 drivers/md/md.c:6779 do_md_run+0x36/0x660 drivers/md/md.c:6880 array_state_store+0x9c5/0xcf0 drivers/md/md.c:4765 md_attr_store+0x1c5/0x330 drivers/md/md.c:6158 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6af/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe6b68b8a77 Code: 48 89 fa 4c 89 df e8 98 1d 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff RSP: 002b:00007ffd56632d40 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00005555884d2400 RCX: 00007fe6b68b8a77 RDX: 0000000000000006 RSI: 00007fe6b68f21aa RDI: 0000000000000003 RBP: 0000000000000032 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00007fe6b68f21aa R13: 00007fe6b68f4500 R14: 0000000000000002 R15: 00007fe6b68f44b0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:raid5_run+0x11a7/0x1670 drivers/md/raid5.c:8117 Code: 03 00 00 41 8b ae d0 01 00 00 31 ff 89 ee e8 f0 f6 82 f9 48 c7 44 24 10 00 00 00 00 85 ed 0f 84 44 f4 ff ff e8 6a fc 82 f9 90 <0f> 0b e8 62 fc 82 f9 49 8d 86 e0 00 00 00 48 89 c2 48 89 44 24 60 RSP: 0018:ffffc90003c879f8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88802bdb2580 RSI: ffffffff888914a6 RDI: ffff88802bdb2580 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000008 R13: 0000000000000000 R14: ffff88802cfb0000 R15: ffff88802cfb0028 FS: 00005555884d2400(0000) GS:ffff8880d5d5d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff95c66058 CR3: 000000005631b000 CR4: 0000000000352ef0 --- 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.