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WARNING in btrfs_remove_chunk

Status: upstream: reported C repro on 2023/03/17 14:37
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+d41a75a33304b313bf46@syzkaller.appspotmail.com
First crash: 935d, last: 3d01h
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2023/12/25 linux-5.15.y (ToT) d93fa2c78854 C [report] WARNING in btrfs_remove_chunk
2023/11/10 upstream (ToT) 89cdf9d55601 C [report] WARNING in btrfs_remove_chunk
2023/12/25 upstream (ToT) 861deac3b092 C Didn't crash
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 WARNING in btrfs_remove_chunk origin:upstream -1 C 5 12d 25d 0/2 upstream: reported C repro on 2025/09/12 10:19
linux-6.1 WARNING in btrfs_remove_chunk (2) origin:upstream -1 C error 56 6d02h 658d 0/3 upstream: reported C repro on 2023/12/20 03:26
upstream WARNING in btrfs_remove_chunk btrfs -1 C error inconclusive 412 13h21m 1042d 0/29 upstream: reported C repro on 2022/11/30 08:16
linux-6.1 WARNING in btrfs_remove_chunk origin:lts-only -1 C done 10 831d 922d 3/3 fixed on 2023/09/19 11:51
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2025/10/05 05:16 12m retest repro linux-5.15.y report log
2025/10/05 05:16 15m retest repro linux-5.15.y report log
2025/10/05 05:16 13m retest repro linux-5.15.y report log
2025/09/09 11:36 14m retest repro linux-5.15.y report log
2025/09/09 11:36 15m retest repro linux-5.15.y report log
2025/09/09 11:36 11m retest repro linux-5.15.y report log
2025/09/09 11:36 15m retest repro linux-5.15.y report log
2025/09/09 11:36 19m retest repro linux-5.15.y report log
2025/01/06 23:50 1h09m retest repro linux-5.15.y OK log
2025/01/06 23:50 11m retest repro linux-5.15.y report log
▶ ▼ Fix bisection attempts (5)
Created Duration User Patch Repo Result
2024/03/25 10:01 2h47m (2) fix candidate upstream OK (0) job log
2024/01/03 02:13 12h13m fix candidate upstream error job log
2023/10/02 12:25 0m fix candidate upstream error job log
2023/08/14 03:13 1m fix candidate upstream error job log
2023/06/06 00:30 0m bisect fix linux-5.15.y error job log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5272 at fs/btrfs/volumes.c:3259 btrfs_remove_chunk+0x14a2/0x19c0 fs/btrfs/volumes.c:3259
Modules linked in:
CPU: 1 PID: 5272 Comm: syz.2.155 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:btrfs_remove_chunk+0x14a2/0x19c0 fs/btrfs/volumes.c:3259
Code: e9 5b fb ff ff e8 de 8e 30 fe 0f 1f 44 00 00 e8 d4 8e 30 fe eb 16 e8 cd 8e 30 fe 48 c7 c7 40 76 4b 8a 44 89 f6 e8 8e eb 56 06 <0f> 0b 4c 89 e7 48 c7 c6 a0 79 4b 8a ba bb 0c 00 00 e9 20 fb ff ff
RSP: 0018:ffffc90005aaf920 EFLAGS: 00010246
RAX: c1b9ca0696e6f400 RBX: ffff88805cfbc001 RCX: ffff888027c48000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90005aafad8 R08: dffffc0000000000 R09: ffffed1017224f2c
R10: ffffed1017224f2c R11: 1ffff11017224f2b R12: ffff888070dce6e0
R13: dffffc0000000000 R14: ffffffffffffffe4 R15: 1ffff110049d3870
FS:  00007fc42ea376c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e6064f5238 CR3: 0000000072ee5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_relocate_chunk+0x1f5/0x290 fs/btrfs/volumes.c:3376
 __btrfs_balance+0x1641/0x2250 fs/btrfs/volumes.c:4079
 btrfs_balance+0xd89/0x1520 fs/btrfs/volumes.c:4469
 btrfs_ioctl_balance+0x674/0x810 fs/btrfs/ioctl.c:4152
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fc42f3c7c29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc42ea37038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc42f60efa0 RCX: 00007fc42f3c7c29
RDX: 0000200000000180 RSI: 00000000c4009420 RDI: 0000000000000004
RBP: 00007fc42f44ae41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc42f60f038 R14: 00007fc42f60efa0 R15: 00007ffed8b8fa18
 </TASK>

Crashes (109):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/20 02:36 linux-5.15.y 43bb85222e53 67c37560 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/02/10 03:28 linux-5.15.y c16c81c81336 ef44b750 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2023/11/10 02:18 linux-5.15.y 80529b4968a8 56230772 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2023/07/11 22:15 linux-5.15.y d54cfc420586 2f19aa4f .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/04/17 03:26 linux-5.15.y f7347f400572 a95239b1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2024/10/25 10:56 linux-5.15.y 74cdd62cb470 c79b8ca5 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2024/06/07 12:49 linux-5.15.y c61bd26ae81a 121701b6 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/05/31 00:40 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/09/20 01:19 linux-5.15.y 43bb85222e53 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/09/10 00:04 linux-5.15.y de9476bb4f1b d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/08/07 13:57 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/08/03 15:06 linux-5.15.y c79648372d02 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/07/05 00:39 linux-5.15.y 3dea0e7f549e d869b261 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/07/03 08:33 linux-5.15.y 3dea0e7f549e 115ceea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/06/13 13:35 linux-5.15.y 1c700860e8bc 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/05/27 15:30 linux-5.15.y 98f47d0e9b8c 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/04/07 16:37 linux-5.15.y 0c935c049b5c a2ada0e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/04/02 07:50 linux-5.15.y 0c935c049b5c c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/03/12 02:53 linux-5.15.y c16c81c81336 ee70e6db .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/03/03 20:34 linux-5.15.y c16c81c81336 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/02/10 17:12 linux-5.15.y c16c81c81336 43f51a00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/02/10 00:37 linux-5.15.y c16c81c81336 ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/02/07 06:03 linux-5.15.y c16c81c81336 8002dd28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/01/28 00:54 linux-5.15.y 003148680b79 18070896 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in btrfs_remove_chunk
2025/08/24 02:21 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/07/21 14:41 linux-5.15.y c79648372d02 56d87229 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/07/20 10:36 linux-5.15.y c79648372d02 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/07/11 20:54 linux-5.15.y 2f693b607545 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/07/08 12:33 linux-5.15.y 3dea0e7f549e 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/07/02 06:13 linux-5.15.y 3dea0e7f549e bc80e4f0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/06/29 19:55 linux-5.15.y 3dea0e7f549e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/06/21 22:07 linux-5.15.y 1c700860e8bc d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/06/19 05:14 linux-5.15.y 1c700860e8bc ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/06/07 07:43 linux-5.15.y 1c700860e8bc 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/06/04 19:00 linux-5.15.y 1c700860e8bc e565f08d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/06/03 07:12 linux-5.15.y 98f47d0e9b8c a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/06/02 17:21 linux-5.15.y 98f47d0e9b8c b396b4bf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/05/24 19:32 linux-5.15.y 98f47d0e9b8c ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/05/22 09:07 linux-5.15.y a68c15152131 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/05/18 14:17 linux-5.15.y a68c15152131 f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/05/04 15:15 linux-5.15.y 16fdf2c7111b b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/04/23 21:06 linux-5.15.y f7347f400572 73a168d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/04/22 11:31 linux-5.15.y f7347f400572 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/03/31 02:37 linux-5.15.y 0c935c049b5c d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/03/26 10:11 linux-5.15.y 0c935c049b5c 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/03/15 13:37 linux-5.15.y 0c935c049b5c e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/03/05 14:16 linux-5.15.y c16c81c81336 60f5d8d9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/03/03 18:09 linux-5.15.y c16c81c81336 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/02/27 00:59 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/02/24 05:33 linux-5.15.y c16c81c81336 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/02/24 02:11 linux-5.15.y c16c81c81336 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/02/15 08:29 linux-5.15.y c16c81c81336 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/02/13 10:53 linux-5.15.y c16c81c81336 b27c2402 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/02/11 09:08 linux-5.15.y c16c81c81336 43f51a00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/01/31 22:26 linux-5.15.y 003148680b79 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/01/26 14:50 linux-5.15.y 003148680b79 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2025/01/17 15:12 linux-5.15.y 4735586da88e 953d1c45 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2023/03/31 15:29 linux-5.15.y c957cbb87315 f325deb0 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2023/03/29 23:42 linux-5.15.y 115472395b0a f325deb0 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
2023/03/17 14:36 linux-5.15.y 8020ae3c051d 18b58603 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in btrfs_remove_chunk
* Struck through repros no longer work on HEAD.