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WARNING in bch2_fs_read_write_early (2)

Status: upstream: reported on 2024/11/22 07:22
Subsystems: bcachefs
[Documentation on labels]
Reported-by: syzbot+61a8a372d9269e5c9c6d@syzkaller.appspotmail.com
First crash: 4d16h, last: 4d16h
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [bcachefs?] WARNING in bch2_fs_read_write_early (2) 0 (1) 2024/11/22 07:22
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in bch2_fs_read_write_early bcachefs C 35 153d 161d 26/28 fixed on 2024/07/09 19:14

Sample crash report:
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 3812 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 3570 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 3328 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 3086 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 2844 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 2602 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 2360 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 2118 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 1876 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 1634 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 1392 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 1150 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 908 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 666 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 424 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): error validating btree node at btree extents level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 1032 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0  
  node offset 0/1032 bset u64s 182 bset byte offset 160: bad k->u64s 0 (min 3 max 253), fixing
bcachefs (loop0): btree_node_read_work: rewriting btree node at btree=extents level=0 SPOS_MAX due to error
------------[ cut here ]------------
WARNING: CPU: 0 PID: 37 at fs/bcachefs/super.c:526 bch2_fs_read_write_early+0x7f/0xb0 fs/bcachefs/super.c:526
Modules linked in:
CPU: 0 UID: 0 PID: 37 Comm: kworker/0:1H Not tainted 6.12.0-rc7-syzkaller-00216-gf66d6acccbc0 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: bcachefs_btree_read_complete btree_node_read_work
RIP: 0010:bch2_fs_read_write_early+0x7f/0xb0 fs/bcachefs/super.c:526
Code: e8 46 74 48 fd 85 ed 74 1b e8 fd 6f 48 fd eb 05 e8 f6 6f 48 fd 48 89 df be 01 00 00 00 5b 5d e9 07 fc ff ff e8 e2 6f 48 fd 90 <0f> 0b 90 eb e6 48 c7 c1 4c 40 1d 90 80 e1 07 80 c1 03 38 c1 7c 96
RSP: 0018:ffffc9000057f8f8 EFLAGS: 00010293
RAX: ffffffff844c7a2e RBX: ffff888050100000 RCX: ffff88801ddb0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff844c7a0a R09: 1ffff1100a020035
R10: dffffc0000000000 R11: ffffed100a020036 R12: ffff88803664b300
R13: 1ffff1100a020035 R14: ffff8880501001a8 R15: ffff888050100000
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555777f85f8 CR3: 0000000040778000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_btree_node_rewrite_async+0x3df/0x6a0 fs/bcachefs/btree_update_interior.c:2287
 btree_node_read_work+0xf59/0x1260 fs/bcachefs/btree_io.c:1350
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/18 07:20 upstream f66d6acccbc0 cfe3a04a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in bch2_fs_read_write_early
* Struck through repros no longer work on HEAD.