WARNING in btrfs_relocate_block_group

Status: auto-obsoleted due to no activity on 2025/12/29 08:37
Subsystems: btrfs
[Documentation on labels]
Reported-by: syzbot+07a7e6273e07bda9ef8b@syzkaller.appspotmail.com
First crash: 1191d, last: 333d
Cause bisection: failed (error log, bisect log)
  
Fix bisection: the issue occurs on the latest tested release (bisect log)
  
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [btrfs?] WARNING in btrfs_relocate_block_group 0 (2) 2023/06/23 20:18
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in btrfs_relocate_block_group origin:upstream -1 syz, C error 2 18d 1160d 0/3 upstream: reported C repro on 2023/06/16 22:29
linux-6.1 WARNING in btrfs_relocate_block_group origin:upstream -1 syz, C error 1 985d 1158d 0/3 upstream: reported C repro on 2023/06/19 01:45
▶ ▼ Last patch testing requests (9)
Created Duration User Patch Repo Result
2025/10/04 09:26 19m retest repro upstream no crash log
2025/07/15 16:18 26m retest repro upstream report log
2025/05/04 10:22 19m retest repro upstream report log
2025/02/17 16:58 15m retest repro upstream report log
2024/11/15 19:59 15m retest repro upstream report log
2024/09/04 20:36 15m retest repro upstream report log
2024/06/26 13:54 16m retest repro upstream report log
2023/10/17 23:31 23m retest repro upstream no crash log
2023/08/22 21:54 56m retest repro upstream report log
▶ ▼ Fix bisection attempts (8)
Created Duration User Patch Repo Result
2024/04/17 08:22 3h18m bisect fix upstream OK (0) job log
2024/03/14 15:45 2h24m bisect fix upstream OK (0) job log log
2024/02/10 18:41 1h59m bisect fix upstream OK (0) job log log
2024/01/04 06:37 1h52m bisect fix upstream OK (0) job log log
2023/12/04 09:10 1h52m bisect fix upstream OK (0) job log log
2023/11/03 04:07 2h51m bisect fix upstream OK (0) job log log
2023/10/03 20:57 1h56m bisect fix upstream OK (0) job log log
2023/07/28 12:17 2h46m bisect fix upstream OK (0) job log log

Sample crash report:
BTRFS info (device loop0): balance: start -d -m
BTRFS info (device loop0): relocating block group 6881280 flags data|metadata
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5709 at fs/btrfs/relocation.c:4123 btrfs_relocate_block_group+0xaaa/0xe50 fs/btrfs/relocation.c:4123
Modules linked in:
CPU: 0 PID: 5709 Comm: syz-executor272 Not tainted 6.4.0-rc7-syzkaller-00194-g8a28a0b6f1a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:btrfs_relocate_block_group+0xaaa/0xe50 fs/btrfs/relocation.c:4123
Code: 4c 89 ef e8 c8 38 59 fe e9 5d fe ff ff e8 5e 6b 06 fe 4c 89 f7 41 bc e6 ff ff ff e8 80 e4 0b 00 e9 11 f8 ff ff e8 46 6b 06 fe <0f> 0b e9 d7 fe ff ff e8 3a 6b 06 fe 0f 0b e9 90 fe ff ff e8 2e 6b
RSP: 0018:ffffc90005df7968 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000190000 RCX: 0000000000000000
RDX: ffff88807dfc5940 RSI: ffffffff837dde1a RDI: 0000000000000007
RBP: ffff888023904000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000190000 R11: 0000000000094001 R12: 0000000000000000
R13: ffff888015bd0000 R14: ffff88802cb88000 R15: ffff88802cb88000
FS:  00007fbbd1de1700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd3bb0ed028 CR3: 0000000016f19000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 btrfs_relocate_chunk+0x14a/0x440 fs/btrfs/volumes.c:3276
 __btrfs_balance fs/btrfs/volumes.c:4011 [inline]
 btrfs_balance+0x1e8f/0x40f0 fs/btrfs/volumes.c:4395
 btrfs_ioctl_balance fs/btrfs/ioctl.c:3599 [inline]
 btrfs_ioctl+0x12a6/0x5b30 fs/btrfs/ioctl.c:4632
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fbbd92586f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fbbd1de12f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fbbd92e37f0 RCX: 00007fbbd92586f9
RDX: 00000000200003c0 RSI: 00000000c4009420 RDI: 0000000000000005
RBP: 00007fbbd92af4cc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 61635f7261656c63 R14: 0100000000008001 R15: 00007fbbd92e37f8
 </TASK>

Crashes (21):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/06/23 20:17 upstream 8a28a0b6f1a1 09ffe269 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in btrfs_relocate_block_group
2023/05/18 08:26 upstream 1b66c114d161 3bb7af1d .config console log report syz [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in btrfs_relocate_block_group
2025/02/03 12:47 upstream 2014c95afece a21a8419 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2025/01/20 19:51 upstream ffd294d346d1 6e87cfa2 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2025/01/15 15:59 upstream 619f0b6fad52 968edaf4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2025/01/11 01:55 upstream 2144da25584e d9381135 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2025/01/03 19:44 upstream 0bc21e701a6f 96d578a3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2024/12/30 11:38 upstream fc033cf25e61 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2024/12/23 20:19 upstream 4bbf9020becb 444551c4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2024/12/22 06:47 upstream 48f506ad0b68 d7f584ee .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2024/12/11 17:27 upstream f92f4749861b ff949d25 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2024/12/09 21:39 upstream 7cb1b4663150 deb72877 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2024/12/09 21:19 upstream 7cb1b4663150 deb72877 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2024/11/27 06:28 upstream 445d9f05fa14 52b38cc1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2024/09/07 07:03 upstream b31c44928842 9750182a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in btrfs_relocate_block_group
2023/06/23 05:37 upstream 8a28a0b6f1a1 79782afc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in btrfs_relocate_block_group
2023/06/15 13:07 upstream b6dad5178cea 90d4044e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in btrfs_relocate_block_group
2023/05/18 07:08 upstream 1b66c114d161 3bb7af1d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in btrfs_relocate_block_group
2023/05/16 14:51 upstream f1fcbaa18b28 71b00cfb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in btrfs_relocate_block_group
2025/09/20 08:36 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 506ba4ea4cf5 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in btrfs_relocate_block_group
2025/04/19 02:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c72692105976 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in btrfs_relocate_block_group
* Struck through repros no longer work on HEAD.