From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f197.google.com (mail-oi1-f197.google.com [209.85.167.197]) (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 8AF323AA4E1 for ; Mon, 19 Oct 2026 05:11:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792386693; cv=none; b=tn9ocYTCimYZpz72W4+4P8tu6JbgaLKwMEy11H0cQolf/c2fHc3HKji8PSD7PRph9nJhgLw6zGcstBW8/HIno2tOXpr/Or0fwj09G/0/jfl4SdHJq8dKzwI61vhkWN6r9hXxsVu6Br65rFmMRys+OQ7M1I72nziiNqchijMeUQ4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792386693; c=relaxed/simple; bh=nVj/bgdC1Ohyocal4Il0FqAeW/5QWOV4GQ6Q+DQv2f0=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=a0FUyLtjfb2LLyKrsqVdQ50VBK0fOb2jeUXX070t2k00vHm6jtgacG+e72dE4TDCKKQAlyOaTLQoH9ZBFDm7eMXSzaJZcJBXNSAalTobq4Dy5CGCr1NRbnPMc/JccDc/gNJrF0VihMa0pMionAkl14w6K9tGiNvxjeFlBSEPSqM= 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=209.85.167.197 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-oi1-f197.google.com with SMTP id 5614622812f47-4ab4f652f9bso1444267b6e.0 for ; Sun, 18 Oct 2026 22:11:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1792386687; x=1792991487; 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=0+8zT4mGy6dcRx9KTjqk/ppPsWRxCzDh9ncX9YEziZE=; b=Rg2fWSGGIav4dfCvwX4ORe+rVpG7GMsI+BvgmcaxH/tYNJLNeqPhTQJnkY6qJ8K8ax Ztw4mi5m4pnySi4Ie3bxhWI0huDDdntHAzLhWLl+rZ2xVItYkPnSZHJZAnBf5mklj7DU hXfaStLZrtEiqqqKBJOeX89YKX82CJMvwndijXNRACFKDIMnK8zGfa2yism8AoMjKOkv 9QmQ66RUjGYzJs4C59e9Cc8eexYYpDi3fbYHguS32kDMyf2/KvG2Eb4s1+4ko3C9Sgeg g9i/laLeJLmOetTBe8C8SUhepg4toWIwjcfF40vPhXD32nL1gG8Dlt55JvSvjyCf192g FQDg== X-Gm-Message-State: AFq9FYL4kAgkxgb+zJeiWI5eqJc50Xf/OkyF++GZqDKSSUJ82AT3i5by Jy9zHD1AKfHS9OVTztahFLB5LP5/4d7RJpPykYli3IyK18UhUm3QaZ7aUrwFrIcEkRXD0dV6fv9 7C0oCyjateTEydrLw0q4Jqj/cECTCLn1INq+0DFNNF7W1dV0aJHGiK0oGqKc= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:4e82:b0:53f:4cb6:cdc1 with SMTP id 5614622812f47-53f4cb6d286mr3228740b6e.34.1792386687530; Sun, 18 Oct 2026 22:11:27 -0700 (PDT) Date: Sun, 18 Oct 2026 22:11:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ad5a67f.6814cce4.34c49f.0162.GAE@google.com> Subject: [syzbot] [raid?] general protection fault in raid5_quiesce From: syzbot To: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, song@kernel.org, syzkaller-bugs@googlegroups.com, yukuai@fnnas.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f909e534f5e3 Merge tag 'scsi-fixes' of git://git.kernel.or.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=1307b13e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b38d39c45202f4fa dashboard link: https://syzkaller.appspot.com/bug?extid=0b672810a475890d3636 compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1707b13e580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0b672810a475890d3636@syzkaller.appspotmail.com md/raid:md0: not enough operational devices (1/3 failed) md/raid:md0: failed to run raid set. Oops: general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] CPU: 0 UID: 0 PID: 5902 Comm: syz-executor169 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210 Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 90 e7 2a 09 cc 66 66 66 66 66 66 2e RSP: 0018:ffffc9000544f708 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffffffff8b5cf203 RCX: 8000000000000001 RDX: 0000000000000000 RSI: ffffffff8b5cf203 RDI: 000000000000000c RBP: ffffc9000544f870 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffffff87ff0a50 R12: 0000000000000060 R13: 0000000000000000 R14: 0000000000000060 R15: 0000000000000001 FS: 000055556c882400(0000) GS:ffff8881249b9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d585e02cd0 CR3: 0000000044162000 CR4: 00000000003526f0 Call Trace: __kasan_check_byte+0x12/0x40 mm/kasan/common.c:584 kasan_check_byte include/linux/kasan.h:402 [inline] lock_acquire+0x7d/0x350 kernel/locking/lockdep.c:5916 rt_spin_lock+0x83/0x400 kernel/locking/spinlock_rt.c:56 spin_lock_irq include/linux/spinlock_rt.h:96 [inline] lock_all_device_hash_locks_irq drivers/md/raid5.c:107 [inline] raid5_quiesce+0xc2/0x8a0 drivers/md/raid5.c:-1 __md_stop_writes+0xeb/0x4b0 drivers/md/md.c:7038 md_set_readonly+0x330/0x560 drivers/md/md.c:7138 array_state_store+0x584/0xe90 drivers/md/md.c:4720 md_attr_store+0x3b7/0x640 drivers/md/md.c:6158 kernfs_fop_write_iter+0x3a5/0x540 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x61e/0xbb0 fs/read_write.c:687 ksys_write+0x156/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb4d4570f77 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:00007ffcae126a10 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000055556c882400 RCX: 00007fb4d4570f77 RDX: 0000000000000008 RSI: 00007fb4d45aa11f RDI: 0000000000000005 RBP: 000055556c8823d8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000006 R13: ffffffffffffffff R14: 0000000000000005 R15: 00000000ffffffff Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210 Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 90 e7 2a 09 cc 66 66 66 66 66 66 2e RSP: 0018:ffffc9000544f708 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffffffff8b5cf203 RCX: 8000000000000001 RDX: 0000000000000000 RSI: ffffffff8b5cf203 RDI: 000000000000000c RBP: ffffc9000544f870 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffffff87ff0a50 R12: 0000000000000060 R13: 0000000000000000 R14: 0000000000000060 R15: 0000000000000001 FS: 000055556c882400(0000) GS:ffff8881249b9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d585e02cd0 CR3: 0000000044162000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 0f 1f 40 00 nopl 0x0(%rax) 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 0f 1f 40 d6 nopl -0x2a(%rax) 18: 48 c1 ef 03 shr $0x3,%rdi 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df * 26: 0f b6 04 07 movzbl (%rdi,%rax,1),%eax <-- trapping instruction 2a: 3c 08 cmp $0x8,%al 2c: 0f 92 c0 setb %al 2f: e9 90 e7 2a 09 jmp 0x92ae7c4 34: cc int3 35: 66 data16 36: 66 data16 37: 66 data16 38: 66 data16 39: 66 data16 3a: 66 data16 3b: 2e cs --- 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 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. 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