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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: 887d, last: 13d
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 (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in btrfs_remove_chunk (2) origin:upstream -1 C error 42 11d 609d 0/3 upstream: reported C repro on 2023/12/20 03:26
upstream WARNING in btrfs_remove_chunk btrfs -1 C error inconclusive 375 2d20h 994d 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 783d 873d 3/3 fixed on 2023/09/19 11:51
▶ ▼ Last patch testing requests (9)
Created Duration User Patch Repo Result
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
2025/01/06 23:50 19m retest repro linux-5.15.y OK log
2024/11/17 12:56 1h03m retest repro linux-5.15.y report log
2024/10/15 05:10 0m retest repro linux-5.15.y error
2024/10/15 05:10 0m retest repro linux-5.15.y error
2024/10/14 23:55 0m retest repro linux-5.15.y error
2024/10/14 23:55 0m retest repro linux-5.15.y error
2024/10/14 23:55 0m retest repro linux-5.15.y error
▶ ▼ 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: 0 PID: 9363 at fs/btrfs/volumes.c:3253 btrfs_remove_chunk+0x1575/0x1aa0 fs/btrfs/volumes.c:3253
Modules linked in:
CPU: 0 PID: 9363 Comm: syz-executor245 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:btrfs_remove_chunk+0x1575/0x1aa0 fs/btrfs/volumes.c:3253
Code: ff e8 df a9 0a fe 4c 8b 24 24 0f 1f 44 00 00 e8 d1 a9 0a fe eb 16 e8 ca a9 0a fe 48 c7 c7 00 bc eb 8a 44 89 f6 e8 5b 43 d6 fd <0f> 0b 4c 89 e7 48 c7 c6 60 bf eb 8a ba b5 0c 00 00 e9 90 fa ff ff
RSP: 0018:ffffc9000f9b78c0 EFLAGS: 00010246
RAX: 40d2bfe6b9b0d000 RBX: 0000000000000000 RCX: ffff88802777d940
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000f9b7a68 R08: ffffffff8166aa8c R09: ffffed10171c4f24
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888072214f20
R13: dffffc0000000000 R14: ffffffffffffffe4 R15: ffff88807910c001
FS:  00007fcce87bc6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcce07ad000 CR3: 0000000023729000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_delete_unused_bgs+0x892/0x940 fs/btrfs/block-group.c:1432
 btrfs_remount+0xe2a/0x1640 fs/btrfs/super.c:2001
 reconfigure_super+0x43a/0x870 fs/super.c:938
 do_remount fs/namespace.c:2668 [inline]
 path_mount+0xceb/0x10a0 fs/namespace.c:3334
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fcce8821ac9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcce87bc168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fcce88ae6d8 RCX: 00007fcce8821ac9
RDX: 0000000000000000 RSI: 0000400000000100 RDI: 0000000000000000
RBP: 00007fcce88ae6d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000021 R11: 0000000000000246 R12: 00007fcce88ae6dc
R13: 000000000000006e R14: 00007ffff21e2410 R15: 00007ffff21e24f8
 </TASK>

Crashes (105):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2025/08/07 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
2025/07/21 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.