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

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Message-ID: <0000000000009e7183061ee0a25f@google.com>
Date: Sun, 04 Aug 2024 12:33:30 -0700
From: syzbot <syzbot+5833b186650f87c5b7c4@...kaller.appspotmail.com>
To: clm@...com, dsterba@...e.com, josef@...icpanda.com, 
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [btrfs?] kernel BUG in btrfs_run_defrag_inodes (2)

Hello,

syzbot found the following issue on:

HEAD commit:    e4fc196f5ba3 Merge tag 'for-6.11-rc1-tag' of git://git.ker..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=133acef9980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8b0cca2f3880513d
dashboard link: https://syzkaller.appspot.com/bug?extid=5833b186650f87c5b7c4
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c4bed4c74b59/disk-e4fc196f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f90c5ef25b80/vmlinux-e4fc196f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3a4dad9a7e8e/bzImage-e4fc196f.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5833b186650f87c5b7c4@...kaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at fs/inode.c:1819!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 10710 Comm: btrfs-cleaner Not tainted 6.11.0-rc1-syzkaller-00062-ge4fc196f5ba3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:iput+0x928/0x930 fs/inode.c:1819
Code: ff e9 a7 fb ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 45 fe ff ff 4c 89 f7 e8 33 aa e7 ff e9 38 fe ff ff e8 29 71 80 ff 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900041ffc50 EFLAGS: 00010293
RAX: ffffffff8212f547 RBX: 0000000000000040 RCX: ffff888023d05a00
RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffff88805e4f48e0 R08: ffffffff8212ec80 R09: 1ffffffff202f495
R10: dffffc0000000000 R11: fffffbfff202f496 R12: ffff88805e4f49b0
R13: ffff88806c102028 R14: 0000000000000005 R15: ffff888068e60350
FS:  0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c9b094108 CR3: 000000005d542000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __btrfs_run_defrag_inode fs/btrfs/defrag.c:281 [inline]
 btrfs_run_defrag_inodes+0xa80/0xdf0 fs/btrfs/defrag.c:327
 cleaner_kthread+0x28c/0x3d0 fs/btrfs/disk-io.c:1527
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:iput+0x928/0x930 fs/inode.c:1819
Code: ff e9 a7 fb ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 45 fe ff ff 4c 89 f7 e8 33 aa e7 ff e9 38 fe ff ff e8 29 71 80 ff 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900041ffc50 EFLAGS: 00010293
RAX: ffffffff8212f547 RBX: 0000000000000040 RCX: ffff888023d05a00
RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffff88805e4f48e0 R08: ffffffff8212ec80 R09: 1ffffffff202f495
R10: dffffc0000000000 R11: fffffbfff202f496 R12: ffff88805e4f49b0
R13: ffff88806c102028 R14: 0000000000000005 R15: ffff888068e60350
FS:  0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c9b094108 CR3: 000000006b99e000 CR4: 0000000000350ef0


---
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