syzbot


kernel BUG in bch2_quota_transfer

Status: upstream: reported on 2025/01/04 20:18
Subsystems: bcachefs
[Documentation on labels]
Reported-by: syzbot+ed19b61515c19e78a5af@syzkaller.appspotmail.com
First crash: 14d, last: 14d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [bcachefs?] kernel BUG in bch2_quota_transfer 0 (1) 2025/01/04 20:18

Sample crash report:
inum: 4099:4294967295 
  mode=100755
  flags=(15300000)
  journal_seq=5
  hash_seed=ab878b4c5ab7c89e
  hash_type=siphash
  bi_size=1050
  bi_sectors=8
  bi_version=0
  bi_atime=1997793410
  bi_ctime=1997793410
  bi_mtime=1997793410
  bi_otime=1997793410
  bi_uid=0
  bi_gid=0
  bi_nlink=0
  bi_generation=0
  bi_dev=0
  bi_data_checksum=0
  bi_compression=0
  bi_project=0
  bi_background_compression=0
  bi_data_replicas=0
  bi_promote_target=0
  bi_foreground_target=0
  bi_background_target=0
  bi_erasure_code=0
  bi_fields_set=0
  bi_dir=4098
  bi_dir_offset=2566586984702133180
  bi_subvol=0
  bi_parent_subvol=0
  bi_nocow=0, fixing
 done
bcachefs (loop0): check_dirents...
dirent points to missing inode:
u64s 8 type dirent 4096:1859603997870691834:U32_MAX len 0 ver 0: lost+found -> 4097 type dir, fixing
 done
bcachefs (loop0): resume_logged_ops... done
bcachefs (loop0): delete_dead_inodes... done
bcachefs (loop0): set_fs_needs_rebalance... done
bcachefs (loop0): reading quotas
bcachefs (loop0): quotas done
bcachefs (loop0): scanning for old btree nodes: min_version 0.24: unwritten_extents
bcachefs (loop0): scanning for old btree nodes done
bcachefs (loop0): done starting filesystem
netlink: 'syz.0.0': attribute type 10 has an invalid length.
netlink: 40 bytes leftover after parsing attributes in process `syz.0.0'.
A link change request failed with some changes committed already. Interface virt_wifi0 may have been left with an inconsistent configuration, please check.
------------[ cut here ]------------
kernel BUG at fs/bcachefs/quota.c:319!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5322 Comm: syz.0.0 Not tainted 6.13.0-rc5-syzkaller-00004-gccb98ccef0e5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__bch2_quota_transfer fs/bcachefs/quota.c:319 [inline]
RIP: 0010:bch2_quota_transfer+0xaba/0xad0 fs/bcachefs/quota.c:367
Code: 48 c7 c7 f0 4a f6 8e 4c 89 e6 e8 41 2a b1 00 e9 c8 fd ff ff e8 37 db 55 fd 90 0f 0b e8 2f db 55 fd 90 0f 0b e8 27 db 55 fd 90 <0f> 0b e8 1f db 55 fd 90 0f 0b e8 d7 10 7f 07 0f 1f 80 00 00 00 00
RSP: 0018:ffffc9000d4bf640 EFLAGS: 00010287
RAX: ffffffff844998b9 RBX: ffff8880522c80a0 RCX: 0000000000100000
RDX: ffffc9000eac2000 RSI: 0000000000000ad7 RDI: 0000000000000ad8
RBP: ffffc9000d4bf7e8 R08: ffffffff84499589 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2032fcf R12: 0000000000000001
R13: 0000000000000000 R14: 1ffff1100a3a1685 R15: ffff888051d0b428
FS:  00007f307cbc16c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020006140 CR3: 0000000040468000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_fs_quota_transfer+0x282/0x4d0 fs/bcachefs/fs.c:140
 bch2_setattr_nonsize+0x3c2/0x12a0 fs/bcachefs/fs.c:1044
 notify_change+0xbca/0xe90 fs/attr.c:552
 chown_common+0x501/0x850 fs/open.c:778
 do_fchownat+0x16a/0x240 fs/open.c:809
 __do_sys_lchown fs/open.c:834 [inline]
 __se_sys_lchown fs/open.c:832 [inline]
 __x64_sys_lchown+0x85/0xa0 fs/open.c:832
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f307bd85d29
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:00007f307cbc1038 EFLAGS: 00000246 ORIG_RAX: 000000000000005e
RAX: ffffffffffffffda RBX: 00007f307bf75fa0 RCX: 00007f307bd85d29
RDX: 0000000039323420 RSI: 00000000706d6174 RDI: 0000000020000200
RBP: 00007f307be01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f307bf75fa0 R15: 00007ffdf9b434c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__bch2_quota_transfer fs/bcachefs/quota.c:319 [inline]
RIP: 0010:bch2_quota_transfer+0xaba/0xad0 fs/bcachefs/quota.c:367
Code: 48 c7 c7 f0 4a f6 8e 4c 89 e6 e8 41 2a b1 00 e9 c8 fd ff ff e8 37 db 55 fd 90 0f 0b e8 2f db 55 fd 90 0f 0b e8 27 db 55 fd 90 <0f> 0b e8 1f db 55 fd 90 0f 0b e8 d7 10 7f 07 0f 1f 80 00 00 00 00
RSP: 0018:ffffc9000d4bf640 EFLAGS: 00010287
RAX: ffffffff844998b9 RBX: ffff8880522c80a0 RCX: 0000000000100000
RDX: ffffc9000eac2000 RSI: 0000000000000ad7 RDI: 0000000000000ad8
RBP: ffffc9000d4bf7e8 R08: ffffffff84499589 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2032fcf R12: 0000000000000001
R13: 0000000000000000 R14: 1ffff1100a3a1685 R15: ffff888051d0b428
FS:  00007f307cbc16c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020006140 CR3: 0000000040468000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/31 20:13 upstream ccb98ccef0e5 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_transfer
* Struck through repros no longer work on HEAD.