invalid bkey u64s 15 type alloc_v4 0:29:0 len 0 ver 0: gen 0 oldest_gen 0 data_type btree journal_seq 18158513697557839873 need_discard 0 need_inc_gen 1 dirty_sectors 256 stripe_sectors 0 cached_sectors 0 stripe 0 stripe_redundancy 0 io_time[READ] 1 io_time[WRITE] 1 fragmentation 0 bp_start 8 invalid backpointers_start: delete?, fixing bcachefs (loop0): error validating btree node on loop0 at btree freespace level 0/0 u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq e81e1ed936acf3df written 0 min_key POS_MIN durability: 1 ptr: 0:29:0 gen 0 node offset 16/0: found bset signature after last bset, fixing bcachefs (loop0): btree_node_read_work: rewriting btree node at btree=freespace level=0 SPOS_MAX due to error bcachefs (loop0): accounting_read... done bcachefs (loop0): alloc_read... done bcachefs (loop0): stripes_read... done bcachefs (loop0): snapshots_read... done bcachefs (loop0): check_allocations... btree ptr not marked in member info btree allocated bitmap u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq ac62141f8dc7e261 written 24 min_key POS_MIN durability: 1 ptr: 0:26:0 gen 0, fixing btree ptr not marked in member info btree allocated bitmap u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 7589ab5e0c11cc7a written 24 min_key POS_MIN durability: 1 ptr: 0:38:0 gen 0, fixing btree ptr not marked in member info btree allocated bitmap u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 9aa2895aefce4bdf written 24 min_key POS_MIN durability: 1 ptr: 0:41:0 gen 0, fixing btree ptr not marked in member info btree allocated bitmap u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c0bef60d07ceb940 written 16 min_key POS_MIN durability: 1 ptr: 0:35:0 gen 0, fixing btree ptr not marked in member info btree allocated bitmap u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq ebb8d5a9e3463bdb written 16 min_key POS_MIN durability: 1 ptr: 0:32:0 gen 0, fixing btree ptr not marked in member info btree allocated bitmap u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq e81e1ed936acf3df written 0 min_key POS_MIN durability: 1 ptr: 0:29:0 gen 0, fixing bucket 0:29 data type btree ptr gen 0 missing in alloc btree while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq e81e1ed936acf3df written 0 min_key POS_MIN durability: 1 ptr: 0:29:0 gen 0, fixing bucket 0:29 gen 0 has wrong data_type: got free, should be btree, fixing bucket 0:29 gen 0 data type btree has wrong dirty_sectors: got 0, should be 256, fixing done bcachefs (loop0): going read-write bcachefs (loop0): journal_replay... done bcachefs (loop0): check_inodes... done bcachefs (loop0): resume_logged_ops... done bcachefs (loop0): delete_dead_inodes... done bcachefs (loop0): done starting filesystem loop0: detected capacity change from 32768 to 64 ============================================ WARNING: possible recursive locking detected 6.13.0-syzkaller #0 Not tainted -------------------------------------------- syz.0.0/5315 is trying to acquire lock: ffff8880548ae6c8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] ffff8880548ae6c8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: bch2_symlink+0x176/0x310 fs/bcachefs/fs.c:803 but task is already holding lock: ffff8880548ac8c8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] ffff8880548ac8c8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: ovl_copy_up_workdir fs/overlayfs/copy_up.c:782 [inline] ffff8880548ac8c8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: ovl_do_copy_up fs/overlayfs/copy_up.c:1001 [inline] ffff8880548ac8c8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: ovl_copy_up_one fs/overlayfs/copy_up.c:1202 [inline] ffff8880548ac8c8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: ovl_copy_up_flags+0x1931/0x4720 fs/overlayfs/copy_up.c:1257 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&sb->s_type->i_mutex_key#23); lock(&sb->s_type->i_mutex_key#23); *** DEADLOCK *** May be due to missing lock nesting notation 5 locks held by syz.0.0/5315: #0: ffff888043a7a420 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:516 #1: ffff8880433f69e0 (&ovl_i_mutex_key[depth]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #1: ffff8880433f69e0 (&ovl_i_mutex_key[depth]){+.+.}-{4:4}, at: vfs_setxattr+0x1e1/0x430 fs/xattr.c:320 #2: ffff8880433f6d98 (&ovl_i_lock_key[depth]){+.+.}-{4:4}, at: ovl_inode_lock_interruptible fs/overlayfs/overlayfs.h:650 [inline] #2: ffff8880433f6d98 (&ovl_i_lock_key[depth]){+.+.}-{4:4}, at: ovl_copy_up_start+0x53/0x310 fs/overlayfs/util.c:727 #3: ffff88803a03e420 (sb_writers#13){.+.+}-{0:0}, at: ovl_copy_up_workdir fs/overlayfs/copy_up.c:781 [inline] #3: ffff88803a03e420 (sb_writers#13){.+.+}-{0:0}, at: ovl_do_copy_up fs/overlayfs/copy_up.c:1001 [inline] #3: ffff88803a03e420 (sb_writers#13){.+.+}-{0:0}, at: ovl_copy_up_one fs/overlayfs/copy_up.c:1202 [inline] #3: ffff88803a03e420 (sb_writers#13){.+.+}-{0:0}, at: ovl_copy_up_flags+0x191a/0x4720 fs/overlayfs/copy_up.c:1257 #4: ffff8880548ac8c8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #4: ffff8880548ac8c8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: ovl_copy_up_workdir fs/overlayfs/copy_up.c:782 [inline] #4: ffff8880548ac8c8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: ovl_do_copy_up fs/overlayfs/copy_up.c:1001 [inline] #4: ffff8880548ac8c8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: ovl_copy_up_one fs/overlayfs/copy_up.c:1202 [inline] #4: ffff8880548ac8c8 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: ovl_copy_up_flags+0x1931/0x4720 fs/overlayfs/copy_up.c:1257 stack backtrace: CPU: 0 UID: 0 PID: 5315 Comm: syz.0.0 Not tainted 6.13.0-syzkaller #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: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3037 check_deadlock kernel/locking/lockdep.c:3089 [inline] validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3891 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 down_write+0x99/0x220 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:818 [inline] bch2_symlink+0x176/0x310 fs/bcachefs/fs.c:803 vfs_symlink+0x137/0x2e0 fs/namei.c:4669 ovl_do_symlink+0x85/0xd0 fs/overlayfs/overlayfs.h:267 ovl_create_real+0x346/0x550 fs/overlayfs/dir.c:206 ovl_copy_up_workdir fs/overlayfs/copy_up.c:783 [inline] ovl_do_copy_up fs/overlayfs/copy_up.c:1001 [inline] ovl_copy_up_one fs/overlayfs/copy_up.c:1202 [inline] ovl_copy_up_flags+0x196d/0x4720 fs/overlayfs/copy_up.c:1257 ovl_xattr_set+0x348/0x520 fs/overlayfs/xattrs.c:56 ovl_own_xattr_set+0x173/0x1c0 fs/overlayfs/xattrs.c:213 __vfs_setxattr+0x468/0x4a0 fs/xattr.c:200 __vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234 vfs_setxattr+0x221/0x430 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x2af/0x430 fs/xattr.c:665 path_setxattrat+0x440/0x510 fs/xattr.c:713 __do_sys_lsetxattr fs/xattr.c:754 [inline] __se_sys_lsetxattr fs/xattr.c:750 [inline] __x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:750 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: 0033:0x7ff8a5b85d29 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:00007ff8a692a038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007ff8a5d75fa0 RCX: 00007ff8a5b85d29 RDX: 0000000020002a00 RSI: 00000000200029c0 RDI: 0000000020002980 RBP: 00007ff8a5c01b08 R08: 0000000000000002 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff8a5d75fa0 R15: 00007ffe282803b8 syz.0.0: attempt to access beyond end of device loop0: rw=6145, sector=4096, nr_sectors = 10 limit=64 bcachefs (loop0): superblock write error: I/O bcachefs (loop0): bch2_write_super(): fatal error : Unable to write superblock to sufficient devices (from __bch2_check_set_feature) bcachefs (loop0): bch2_btree_update_start(): error EIO syz.0.0: attempt to access beyond end of device loop0: rw=0, sector=8704, nr_sectors = 8 limit=64 bcachefs (loop0 inum 4099 offset 0): data read error: I/O syz.0.0: attempt to access beyond end of device loop0: rw=2048, sector=8704, nr_sectors = 8 limit=64 bcachefs (loop0 inum 4099 offset 0): data read error: I/O syz.0.0 (5315) used greatest stack depth: 10240 bytes left