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Date:   Sat, 22 Apr 2023 16:46:34 -0700
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Subject: [syzbot] [btrfs?] kernel BUG in scrub_handle_errored_block
From:   syzbot <syzbot+e19c41a2f26eccf41aab@syzkaller.appspotmail.com>
To:     chris@chrisdown.name, clm@fb.com, dsterba@suse.com,
        josef@toxicpanda.com, linux-btrfs@vger.kernel.org,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        syzkaller-bugs@googlegroups.com
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Hello,

syzbot found the following issue on:

HEAD commit:    af67688dca57 Merge tag 'mmc-v6.3-rc3' of git://git.kernel...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17f8020bc80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=4afb87f3ec27b7fd
dashboard link: https://syzkaller.appspot.com/bug?extid=e19c41a2f26eccf41aab
compiler:       Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/eaa3ac1127b4/disk-af67688d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/02dd376f6bb3/vmlinux-af67688d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0162b8821f2f/bzImage-af67688d.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e19c41a2f26eccf41aab@syzkaller.appspotmail.com

BTRFS warning (device loop5): tree block 5423104 mirror 1 has bad bytenr, has 0 want 5423104
assertion failed: 0, in fs/btrfs/scrub.c:614
------------[ cut here ]------------
kernel BUG at fs/btrfs/messages.c:259!
invalid opcode: 0000 [#2] PREEMPT SMP KASAN
CPU: 0 PID: 17944 Comm: kworker/u4:18 Tainted: G      D            6.3.0-rc7-syzkaller-00043-gaf67688dca57 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Workqueue: btrfs-scrub scrub_bio_end_io_worker
RIP: 0010:btrfs_assertfail+0x18/0x20 fs/btrfs/messages.c:259
Code: df e8 2c 4c 43 f7 e9 50 fb ff ff e8 42 80 01 00 66 90 66 0f 1f 00 89 d1 48 89 f2 48 89 fe 48 c7 c7 80 ef 2b 8b e8 68 60 ff ff <0f> 0b 66 0f 1f 44 00 00 66 0f 1f 00 53 48 89 fb e8 a3 8b ed f6 48
RSP: 0018:ffffc900166a7638 EFLAGS: 00010246
RAX: 000000000000002c RBX: 0000000004248060 RCX: 8c5f616438692d00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900166a7910 R08: ffffffff816df7fc R09: fffff52002cd4e41
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900166a7860
R13: ffff888030d3d000 R14: dffffc0000000000 R15: ffff88801cd20000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33342000 CR3: 0000000029ac2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_full_stripe fs/btrfs/scrub.c:614 [inline]
 scrub_handle_errored_block+0x1ee1/0x4730 fs/btrfs/scrub.c:1067
 scrub_bio_end_io_worker+0x9bb/0x1370 fs/btrfs/scrub.c:2559
 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2390
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
 kthread+0x270/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Modules linked in:


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