linux-kernel - [syzbot] [btrfs?] kernel BUG in btrfs_run_defrag

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Message-ID: <000000000000f27b1005ff3f1047@google.com>
Date:   Wed, 28 Jun 2023 23:46:55 -0700
From:   syzbot <syzbot+afec8fb60a29eee6de33@...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?] kernel BUG in btrfs_run_defrag_inodes

Hello,

syzbot found the following issue on:

HEAD commit:    a92b7d26c743 Merge tag 'drm-fixes-2023-06-23' of git://ano..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1446e8e0a80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=e74b395fe4978721
dashboard link: https://syzkaller.appspot.com/bug?extid=afec8fb60a29eee6de33
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/51be0f38ba27/disk-a92b7d26.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b31a945d3cb5/vmlinux-a92b7d26.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f0b145c24307/bzImage-a92b7d26.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+afec8fb60a29eee6de33@...kaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at fs/inode.c:1763!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5767 Comm: btrfs-cleaner Not tainted 6.4.0-rc7-syzkaller-00226-ga92b7d26c743 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:iput+0x8e8/0x8f0 fs/inode.c:1763
Code: e8 ff e9 b5 fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 46 fe ff ff 4c 89 e7 e8 c2 ec e8 ff e9 39 fe ff ff e8 c8 09 91 ff <0f> 0b 66 0f 1f 44 00 00 f3 0f 1e fa 55 41 57 41 56 53 48 89 f5 48
RSP: 0018:ffffc90015e37c70 EFLAGS: 00010293
RAX: ffffffff81fa7b28 RBX: 0000000000000040 RCX: ffff8880290cd940
RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffff888075690448 R08: ffffffff81fa72a3 R09: fffffbfff1cabba6
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8880214be130 R14: 0000000000000005 R15: ffff8880214be108
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c3eb6dd50 CR3: 000000002cd46000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __btrfs_run_defrag_inode fs/btrfs/defrag.c:282 [inline]
 btrfs_run_defrag_inodes+0xa90/0xe20 fs/btrfs/defrag.c:328
 cleaner_kthread+0x287/0x3c0 fs/btrfs/disk-io.c:1739
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:iput+0x8e8/0x8f0 fs/inode.c:1763
Code: e8 ff e9 b5 fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 46 fe ff ff 4c 89 e7 e8 c2 ec e8 ff e9 39 fe ff ff e8 c8 09 91 ff <0f> 0b 66 0f 1f 44 00 00 f3 0f 1e fa 55 41 57 41 56 53 48 89 f5 48
RSP: 0018:ffffc90015e37c70 EFLAGS: 00010293
RAX: ffffffff81fa7b28 RBX: 0000000000000040 RCX: ffff8880290cd940
RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffff888075690448 R08: ffffffff81fa72a3 R09: fffffbfff1cabba6
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8880214be130 R14: 0000000000000005 R15: ffff8880214be108
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c02af7e000 CR3: 0000000036a4b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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If the bug is already fixed, let syzbot know by replying with:
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