syzbot


kernel BUG in insert_state_fast

Status: upstream: reported C repro on 2023/04/08 08:40
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+a82fd6d6c6330d9f4b32@syzkaller.appspotmail.com
First crash: 922d, last: 1d13h
Fix bisection: failed (error log, bisect log)
  
Bug presence (3)
Date Name Commit Repro Result
2025/09/05 linux-6.1.y (ToT) 28c695c365e1 C [report] kernel BUG in insert_state_fast
2023/05/28 upstream (ToT) 4e893b5aa4ac C [report] kernel BUG in insert_state_fast
2025/09/05 upstream (ToT) d1d10cea0895 C Didn't crash
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in insert_state_fast btrfs -1 C done done 151 433d 1051d 0/29 auto-obsoleted due to no activity on 2025/09/05 12:56
Fix bisection attempts (13)
Created Duration User Patch Repo Result
2025/02/18 05:37 13m bisect fix linux-6.1.y error job log
2025/01/18 15:25 1h31m bisect fix linux-6.1.y OK (0) job log log
2024/10/19 02:03 3h01m bisect fix linux-6.1.y OK (0) job log log
2024/09/17 11:10 2h00m bisect fix linux-6.1.y OK (0) job log log
2024/08/13 07:30 2h26m bisect fix linux-6.1.y OK (0) job log log
2024/07/01 19:28 2h56m bisect fix linux-6.1.y OK (0) job log log
2024/05/23 14:25 1h16m bisect fix linux-6.1.y OK (0) job log log
2024/04/19 12:59 1h40m bisect fix linux-6.1.y OK (0) job log log
2024/03/17 03:22 1h43m bisect fix linux-6.1.y OK (0) job log log
2024/02/12 00:29 1h29m bisect fix linux-6.1.y OK (0) job log log
2024/01/05 08:01 1h26m bisect fix linux-6.1.y OK (0) job log log
2023/12/06 03:39 1h19m bisect fix linux-6.1.y OK (0) job log log
2023/10/09 01:10 1h35m bisect fix linux-6.1.y OK (0) job log log

Sample crash report:
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
------------[ cut here ]------------
kernel BUG at fs/btrfs/extent-io-tree.c:381!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4456 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : set_state_bits fs/btrfs/extent-io-tree.c:381 [inline]
pc : insert_state_fast+0x220/0x224 fs/btrfs/extent-io-tree.c:439
lr : set_state_bits fs/btrfs/extent-io-tree.c:381 [inline]
lr : insert_state_fast+0x220/0x224 fs/btrfs/extent-io-tree.c:439
sp : ffff800020cc70a0
x29: ffff800020cc70a0 x28: ffff0000ea329400 x27: 0000000000000000
x26: dfff800000000000 x25: 0000000000000fff x24: 00000000fffffff4
x23: 0000000000001000 x22: 0000000000000000 x21: ffff0000ea329400
x20: ffff0000ea329400 x19: ffff0000ce1220c0 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082d22e0 x15: 0000000000000000
x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000ff0100
x11: ff0080000a14f36c x10: 0000000000000000 x9 : ffff80000a14f36c
x8 : ffff0000d1e41bc0 x7 : 0000000000000001 x6 : 0000000000000001
x5 : 00000000ffffffff x4 : 0000000000000a20 x3 : 0000000000000a20
x2 : 0000000000000038 x1 : 00000000fffffff4 x0 : 0000000000000000
Call trace:
 set_state_bits fs/btrfs/extent-io-tree.c:381 [inline]
 insert_state_fast+0x220/0x224 fs/btrfs/extent-io-tree.c:439
 __set_extent_bit+0x1388/0x18f8 fs/btrfs/extent-io-tree.c:1000
 set_record_extent_bits+0x68/0x98 fs/btrfs/extent-io-tree.c:1607
 qgroup_reserve_data+0x20c/0x8a4 fs/btrfs/qgroup.c:3812
 btrfs_qgroup_reserve_data+0x40/0xec fs/btrfs/qgroup.c:3855
 btrfs_check_data_free_space+0x12c/0x208 fs/btrfs/delalloc-space.c:152
 btrfs_truncate_block+0x184/0xe48 fs/btrfs/inode.c:4965
 btrfs_cont_expand+0x10c/0x9e0 fs/btrfs/inode.c:5151
 btrfs_write_check+0x3e4/0x4e4 fs/btrfs/file.c:1154
 btrfs_buffered_write+0x19c/0xe28 fs/btrfs/file.c:1197
 btrfs_do_write_iter+0x2ac/0x1154 fs/btrfs/file.c:1684
 btrfs_file_write_iter+0x2c/0x3c fs/btrfs/file.c:1705
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x5ac/0x7c4 fs/read_write.c:584
 ksys_pwrite64 fs/read_write.c:699 [inline]
 __do_sys_pwrite64 fs/read_write.c:709 [inline]
 __se_sys_pwrite64 fs/read_write.c:706 [inline]
 __arm64_sys_pwrite64+0x170/0x200 fs/read_write.c:706
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: aa1903e0 979e1e26 17ffffa0 978d494c (d4210000) 
---[ end trace 0000000000000000 ]---

Crashes (28):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/30 02:06 linux-6.1.y 7b34dc04e4ff 86341da6 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2025/08/17 13:38 linux-6.1.y 0bc96de781b4 1804e95e .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2025/03/31 07:00 linux-6.1.y 8e60a714ba3b d3999433 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2024/11/04 01:20 linux-6.1.y 7c15117f9468 f00eed24 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/11/05 18:32 linux-6.1.y 4a61839152cc 500bfdc4 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/05/27 22:53 linux-6.1.y a343b0dd87b4 cf184559 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2025/10/14 21:37 linux-6.1.y 882efbdd9d34 b6605ba8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2025/10/11 02:08 linux-6.1.y 882efbdd9d34 ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2025/10/09 09:16 linux-6.1.y 882efbdd9d34 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2025/09/26 17:44 linux-6.1.y 7b34dc04e4ff 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2025/08/21 09:46 linux-6.1.y 0bc96de781b4 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2025/08/17 13:08 linux-6.1.y 0bc96de781b4 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2025/04/02 23:39 linux-6.1.y 8e60a714ba3b c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2025/03/31 06:26 linux-6.1.y 8e60a714ba3b d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2024/12/08 02:19 linux-6.1.y e4d90d63d385 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2024/11/04 00:41 linux-6.1.y 7c15117f9468 f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/11/05 18:12 linux-6.1.y 4a61839152cc 500bfdc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/08/17 21:06 linux-6.1.y 6c44e13dc284 74b106b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/07/07 14:43 linux-6.1.y 61fd484b2cf6 22ae5830 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/06/24 15:04 linux-6.1.y e84a4e368abe 79782afc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/06/22 09:57 linux-6.1.y e84a4e368abe 79782afc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/05/27 22:35 linux-6.1.y a343b0dd87b4 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/05/27 22:35 linux-6.1.y a343b0dd87b4 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/04/25 07:58 linux-6.1.y f17b0ab65d17 65320f8e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/04/22 18:47 linux-6.1.y f17b0ab65d17 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/04/21 23:42 linux-6.1.y f17b0ab65d17 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/04/14 21:56 linux-6.1.y 0102425ac76b ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
2023/04/08 08:39 linux-6.1.y 543aff194ab6 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 kernel BUG in insert_state_fast
* Struck through repros no longer work on HEAD.