syzbot


INFO: trying to register non-static key in simple_recursive_removal

Status: moderation: reported on 2025/03/03 22:45
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+c1649d2200c34e887626@syzkaller.appspotmail.com
First crash: 57d, last: 53d

Sample crash report:
 done
bcachefs (loop0): accounting_read... done
bcachefs (loop0): alloc_read... done
bcachefs (loop0): stripes_read... done
bcachefs (loop0): snapshots_read... done
bcachefs (loop0): done starting filesystem
bcachefs (loop0): missing subvolume 1
bcachefs (loop0): inconsistency detected - emergency read only at journal seq 10
bcachefs (loop0): bch2_fs_get_tree(): error mounting: error getting root inode ENOENT_bkey_type_mismatch
bcachefs (loop0): shutting down
bcachefs (loop0): shutdown complete
bcachefs: bch2_fs_get_tree() error: ENOENT_bkey_type_mismatch
loop0: detected capacity change from 0 to 32768
bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,compression=lz4,erasure_code,fsck,norecovery,nojournal_transaction_names,reconstruct_alloc,nocow,no_data_io
bcachefs (loop0): recovering from clean shutdown, journal seq 10
bcachefs (loop0): Version upgrade required:
Version upgrade from 0.24: unwritten_extents to 1.7: mi_btree_bitmap incomplete
Doing incompatible version upgrade from 0.24: unwritten_extents to 1.20: directory_size
  running recovery passes: check_allocations,check_alloc_info,check_lrus,check_btree_backpointers,check_backpointers_to_extents,check_extents_to_backpointers,check_alloc_to_lru_refs,bucket_gens_init,check_snapshot_trees,check_snapshots,check_subvols,check_subvol_children,delete_dead_snapshots,check_inodes,check_extents,check_indirect_extents,check_dirents,check_xattrs,check_root,check_unreachable_inodes,check_subvolume_structure,check_directory_structure,check_nlinks,set_fs_needs_rebalance
bcachefs (loop0): dropping and reconstructing all alloc info
bcachefs (loop0): error validating btree node on loop0 at btree xattrs level 0/0
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 2285c34bed0abe32 written 16 min_key POS_MIN durability: 1 ptr: 0:31:0 gen 0  
  node offset 0/16 bset u64s 60928: bset past end of btree node (offset 0 len 960 but written 16), exiting
bcachefs (loop0): Unable to continue, halting
bcachefs (loop0): flagging btree xattrs lost data
bcachefs (loop0): running explicit recovery pass check_topology (2), currently at recovery_pass_empty (0)
bcachefs (loop0): running explicit recovery pass scan_for_btree_nodes (1), currently at recovery_pass_empty (0)
error reading btree root btree=xattrs level=0: btree_node_read_error, fixing
invalid bkey in btree_node btree=subvolumes level=0: u64s 7 type subvolume 0:1:0 len 0 ver 0: root 4096 snapshot id 0
  invalid snapshot: delete?, fixing
bcachefs (loop0): scan_for_btree_nodes...
bcachefs (loop0): btree node scan found 7 nodes after overwrites
 done
bcachefs (loop0): check_topology...
bcachefs (loop0): btree root xattrs unreadable, must recover from scan
bcachefs (loop0): bch2_get_scanned_nodes(): recovery btree=xattrs level=0 POS_MIN - SPOS_MAX
bcachefs (loop0): bch2_get_scanned_nodes(): recovering u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 2285c34bed0abe32 written 960 min_key POS_MIN durability: 1 ptr: 0:31:0 gen 0
empty interior btree node at btree=xattrs level=1
u64s 5 type btree_ptr SPOS_MAX len 0 ver 0, fixing
bcachefs (loop0): empty btree root xattrs
 done
bcachefs (loop0): accounting_read... done
bcachefs (loop0): alloc_read... done
bcachefs (loop0): stripes_read... done
bcachefs (loop0): snapshots_read... done
bcachefs (loop0): done starting filesystem
bcachefs (loop0): missing subvolume 1
bcachefs (loop0): inconsistency detected - emergency read only at journal seq 10
bcachefs (loop0): bch2_fs_get_tree(): error mounting: error getting root inode ENOENT_bkey_type_mismatch
bcachefs (loop0): shutting down
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 assign_lock_key+0x241/0x280 kernel/locking/lockdep.c:983
 register_lock_class+0x1cf/0x980 kernel/locking/lockdep.c:1297
 __lock_acquire+0xf3/0x2100 kernel/locking/lockdep.c:5103
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 down_write+0x99/0x220 kernel/locking/rwsem.c:1577
 inode_lock include/linux/fs.h:877 [inline]
 simple_recursive_removal+0x9a/0x8f0 fs/libfs.c:615
 debugfs_remove+0x49/0x70 fs/debugfs/inode.c:805
 __bch2_fs_stop+0x290/0x5c0 fs/bcachefs/super.c:643
 bch2_fs_get_tree+0xd3a/0x17a0 fs/bcachefs/fs.c:2303
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3560
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088
 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: 0033:0x7f5a0178e90a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f5a0259fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5a0259fef0 RCX: 00007f5a0178e90a
RDX: 00004000000058c0 RSI: 0000400000005900 RDI: 00007f5a0259feb0
RBP: 00004000000058c0 R08: 00007f5a0259fef0 R09: 0000000000010000
R10: 0000000000010000 R11: 0000000000000246 R12: 0000400000005900
R13: 00007f5a0259feb0 R14: 0000000000005912 R15: 00004000000001c0
 </TASK>
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON(sem->magic != sem): count = 0x1, magic = 0x0, owner = 0xffff888000268000, curr 0xffff888000268000, list not empty
WARNING: CPU: 0 PID: 5321 at kernel/locking/rwsem.c:1362 __up_write kernel/locking/rwsem.c:1362 [inline]
WARNING: CPU: 0 PID: 5321 at kernel/locking/rwsem.c:1362 up_write+0x412/0x590 kernel/locking/rwsem.c:1630
Modules linked in:
CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #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:__up_write kernel/locking/rwsem.c:1362 [inline]
RIP: 0010:up_write+0x412/0x590 kernel/locking/rwsem.c:1630
Code: c7 c7 c0 98 2a 8c 48 c7 c6 20 9a 2a 8c 48 89 da 48 8b 4c 24 20 4c 8b 44 24 30 4c 8b 4c 24 28 50 e8 d3 83 e5 ff 48 83 c4 08 90 <0f> 0b 90 90 e9 b6 fc ff ff 90 0f 0b 90 e9 2a fd ff ff 48 89 5c 24
RSP: 0018:ffffc9000d2d7740 EFLAGS: 00010292
RAX: 23fea20b62780700 RBX: 0000000000000001 RCX: ffff888000268000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000d2d7810 R08: ffffffff81817e32 R09: fffffbfff1d3a614
R10: dffffc0000000000 R11: fffffbfff1d3a614 R12: ffff8880550df938
R13: ffff8880550df8e0 R14: 1ffff92001a5aef0 R15: dffffc0000000000
FS:  00007f5a025a06c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f59f65ff000 CR3: 000000003f05c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inode_unlock include/linux/fs.h:882 [inline]
 simple_recursive_removal+0x65/0x8f0 fs/libfs.c:648
 debugfs_remove+0x49/0x70 fs/debugfs/inode.c:805
 __bch2_fs_stop+0x290/0x5c0 fs/bcachefs/super.c:643
 bch2_fs_get_tree+0xd3a/0x17a0 fs/bcachefs/fs.c:2303
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3560
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088
 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: 0033:0x7f5a0178e90a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f5a0259fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5a0259fef0 RCX: 00007f5a0178e90a
RDX: 00004000000058c0 RSI: 0000400000005900 RDI: 00007f5a0259feb0
RBP: 00004000000058c0 R08: 00007f5a0259fef0 R09: 0000000000010000
R10: 0000000000010000 R11: 0000000000000246 R12: 0000400000005900
R13: 00007f5a0259feb0 R14: 0000000000005912 R15: 00004000000001c0
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/04 06:16 upstream 99fa936e8e4f c3901742 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root INFO: trying to register non-static key in simple_recursive_removal
2025/02/27 22:40 upstream dd83757f6e68 6a8fcbc4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root INFO: trying to register non-static key in simple_recursive_removal
* Struck through repros no longer work on HEAD.