linux-kernel - [syzbot] [btrfs?] WARNING in btrfs_free_block

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Message-ID: <00000000000015cf6405f8f2d817@google.com>
Date:   Sun, 09 Apr 2023 20:19:34 -0700
From:   syzbot <syzbot+ba5b9ee1d6b1efe0eacf@...kaller.appspotmail.com>
To:     clm@...com, dsterba@...e.com, josef@...icpanda.com,
        linux-btrfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [btrfs?] WARNING in btrfs_free_block_groups

Hello,

syzbot found the following issue on:

HEAD commit:    99ddf2254feb Merge tag 'trace-v6.3-rc5' of git://git.kerne..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10d37ab3c80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=5666fa6aca264e42
dashboard link: https://syzkaller.appspot.com/bug?extid=ba5b9ee1d6b1efe0eacf
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/907a43450c5c/disk-99ddf225.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a142637e5396/vmlinux-99ddf225.xz
kernel image: https://storage.googleapis.com/syzbot-assets/447736ad6200/bzImage-99ddf225.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ba5b9ee1d6b1efe0eacf@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 5126 at fs/btrfs/block-group.c:4290 btrfs_free_block_groups+0xbb9/0xe80 fs/btrfs/block-group.c:4289
Modules linked in:
CPU: 1 PID: 5126 Comm: syz-executor.4 Not tainted 6.3.0-rc5-syzkaller-00032-g99ddf2254feb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:btrfs_free_block_groups+0xbb9/0xe80 fs/btrfs/block-group.c:4289
Code: ef e8 9b 9a 36 fe 48 8d 83 50 ff ff ff 48 89 44 24 08 48 8b 6d 00 31 ff 48 89 ee e8 41 e6 e0 fd 48 85 ed 74 1c e8 f7 e1 e0 fd <0f> 0b 48 8b 7c 24 10 48 8b 74 24 08 31 d2 31 c9 e8 c2 e4 fd ff eb
RSP: 0018:ffffc900047bfab8 EFLAGS: 00010293
RAX: ffffffff83a9832a RBX: ffff8881465a30b0 RCX: ffff888024043a80
RDX: 0000000000000000 RSI: 000000000005e000 RDI: 0000000000000000
RBP: 000000000005e000 R08: ffffffff83a980c8 R09: ffffed1028cb4601
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880303c9128
R13: dffffc0000000000 R14: 1ffff11006079225 R15: ffff8880303c9a00
FS:  0000555556f8e400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555ced708 CR3: 000000002ffce000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 close_ctree+0x742/0xd30 fs/btrfs/disk-io.c:4635
 generic_shutdown_super+0x134/0x340 fs/super.c:500
 kill_anon_super+0x3b/0x60 fs/super.c:1107
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2133
 deactivate_locked_super+0xa4/0x110 fs/super.c:331
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177
 task_work_run+0x24a/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f019388d5d7
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdff37d528 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f019388d5d7
RDX: 00007ffdff37d5fb RSI: 000000000000000a RDI: 00007ffdff37d5f0
RBP: 00007ffdff37d5f0 R08: 00000000ffffffff R09: 00007ffdff37d3c0
R10: 0000555556f8f8b3 R11: 0000000000000246 R12: 00007f01938e6cdc
R13: 00007ffdff37e6b0 R14: 0000555556f8f810 R15: 00007ffdff37e6f0
 </TASK>


---
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