kernel BUG in btrfs_assert_inode_range_clean

Status: upstream: reported on 2026/08/12 00:11
Subsystems: btrfs
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+d6b4e882f299b4de30e1@syzkaller.appspotmail.com
First crash: 19d, last: 3d09h
✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
5fe4f161 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ kernel BUG in btrfs_assert_inode_range_clean 2026/08/09 02:30 2026/08/09 02:30 2026/08/09 03:33 5d63f80b
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [btrfs?] kernel BUG in btrfs_assert_inode_range_clean 0 (1) 2026/08/12 00:11

Sample crash report:
smbdirect: ib_dev[syz2]: added: RNIC max_fast_reg_page_list_len=256 device_cap_flags=0x200000 kernel_cap_flags=0x10 page_size_cap=0x1000
smbdirect: ib_dev[syz2]: num_ports=1 max_qp_rd_atom=128 max_qp_init_rd_atom=128 max_sgl_rd=0 max_sge_rd=1 max_cqe=3276800 max_qp_wr=32768 max_send_sge=6 max_recv_sge=6
smbdirect: ib_dev[syz2]PORT[1]: iwarp=1 ib=0 roce=0 v1=0 v2=0 core_cap_flags=0x400008
iwpm_register_pid: Unable to send a nlmsg (client = 2)
infiniband syz2: RDMA CMA: cma_listen_on_dev, error -98
BTRFS error (device loop0): found unexpected ordered extent in file range [0, 6295551] for inode 263 root 5 (ordered range [131072, 262143])
assertion failed: ordered == NULL, in fs/btrfs/inode.c:10698
------------[ cut here ]------------
kernel BUG at fs/btrfs/inode.c:10698!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5308 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:btrfs_assert_inode_range_clean+0x2cf/0x320 fs/btrfs/inode.c:10698
Code: fd 48 8b 3c 24 e8 01 93 04 00 48 c7 c7 00 5b 59 8c 48 c7 c6 e0 73 59 8c 48 c7 c2 e0 5b 59 8c b9 ca 29 00 00 e8 b2 a5 0e fd 90 <0f> 0b 89 d9 80 e1 07 38 c1 0f 8c b8 fe ff ff be 08 00 00 00 48 89
RSP: 0018:ffffc9000d9f6f28 EFLAGS: 00010246
RAX: 000000000000003c RBX: 0000000000000001 RCX: 56c1619cb535de00
RDX: ffffc9000e8ea000 RSI: 0000000000006104 RDI: 0000000000006105
RBP: 0000000000020000 R08: ffffc9000d9f6ca7 R09: 1ffff92001b3ed94
R10: dffffc0000000000 R11: fffff52001b3ed95 R12: 0000000000000000
R13: 0000000000000005 R14: dffffc0000000000 R15: 0000000000600fff
FS:  00007effce9f56c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000180 CR3: 00000000120a2000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btrfs_punch_hole_lock_range+0x521/0x5b0 fs/btrfs/file.c:2265
 btrfs_punch_hole fs/btrfs/file.c:2730 [inline]
 btrfs_fallocate+0x17a8/0x1c30 fs/btrfs/file.c:3102
 vfs_fallocate+0x65a/0x7e0 fs/open.c:338
 madvise_remove mm/madvise.c:1038 [inline]
 madvise_vma_behavior+0x2c07/0x4340 mm/madvise.c:1351
 madvise_walk_vmas+0x576/0xb00 mm/madvise.c:1712
 madvise_do_behavior+0x385/0x540 mm/madvise.c:1907
 do_madvise+0x327/0x3a0 mm/madvise.c:2005
 __do_sys_madvise mm/madvise.c:2014 [inline]
 __se_sys_madvise mm/madvise.c:2012 [inline]
 __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:2012
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7effd259e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007effce9f4fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007effd2825fa0 RCX: 00007effd259e0d9
RDX: 0000000000000009 RSI: 0000000000600003 RDI: 0000200000000000
RBP: 00007effd2635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007effd2826038 R14: 00007effd2825fa0 R15: 00007ffe432e3d08
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:btrfs_assert_inode_range_clean+0x2cf/0x320 fs/btrfs/inode.c:10698
Code: fd 48 8b 3c 24 e8 01 93 04 00 48 c7 c7 00 5b 59 8c 48 c7 c6 e0 73 59 8c 48 c7 c2 e0 5b 59 8c b9 ca 29 00 00 e8 b2 a5 0e fd 90 <0f> 0b 89 d9 80 e1 07 38 c1 0f 8c b8 fe ff ff be 08 00 00 00 48 89
RSP: 0018:ffffc9000d9f6f28 EFLAGS: 00010246
RAX: 000000000000003c RBX: 0000000000000001 RCX: 56c1619cb535de00
RDX: ffffc9000e8ea000 RSI: 0000000000006104 RDI: 0000000000006105
RBP: 0000000000020000 R08: ffffc9000d9f6ca7 R09: 1ffff92001b3ed94
R10: dffffc0000000000 R11: fffff52001b3ed95 R12: 0000000000000000
R13: 0000000000000005 R14: dffffc0000000000 R15: 0000000000600fff
FS:  00007effce9f56c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b3f0e3a718 CR3: 00000000120a2000 CR4: 0000000000352ef0

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/23 00:18 upstream 818bebeb63dd 1e72964b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in btrfs_assert_inode_range_clean
2026/08/14 07:04 upstream 3aa1dcaa4f6f b13552fe .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in btrfs_assert_inode_range_clean
2026/08/07 18:09 upstream f9a2394a2348 e4ef95d6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in btrfs_assert_inode_range_clean
2026/08/07 18:09 upstream f9a2394a2348 e4ef95d6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in btrfs_assert_inode_range_clean
2026/08/06 21:31 upstream fcaeecb8b0cd cc56899a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in btrfs_assert_inode_range_clean
* Struck through repros no longer work on HEAD.