loop1: detected capacity change from 0 to 32768 JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,1) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.1.95/4620 is trying to acquire lock: ffff88807d48d488 (&osb->system_file_mutex){+.+.}-{3:3}, at: ocfs2_get_system_file_inode+0x1b5/0x760 fs/ocfs2/sysfile.c:101 but task is already holding lock: ffff888050820660 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_expand_inline_dir fs/ocfs2/dir.c:2819 [inline] ffff888050820660 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_extend_dir+0x64b/0x4870 fs/ocfs2/dir.c:3200 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_read_virt_blocks+0x23f/0x8a0 fs/ocfs2/extent_map.c:984 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x3d1/0x1f90 fs/ocfs2/dir.c:1091 ocfs2_find_files_on_disk+0xdb/0x2f0 fs/ocfs2/dir.c:1995 ocfs2_lookup_ino_from_name+0x4f/0xf0 fs/ocfs2/dir.c:2017 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:136 [inline] ocfs2_get_system_file_inode+0x319/0x760 fs/ocfs2/sysfile.c:112 ocfs2_init_global_system_inodes+0x316/0x650 fs/ocfs2/super.c:458 ocfs2_initialize_super fs/ocfs2/super.c:2279 [inline] ocfs2_fill_super+0x3dbf/0x4d80 fs/ocfs2/super.c:995 mount_bdev+0x287/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&osb->system_file_mutex){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 ocfs2_get_system_file_inode+0x1b5/0x760 fs/ocfs2/sysfile.c:101 ocfs2_reserve_suballoc_bits+0x139/0x4350 fs/ocfs2/suballoc.c:776 ocfs2_reserve_new_metadata_blocks+0x400/0x940 fs/ocfs2/suballoc.c:978 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2838 [inline] ocfs2_extend_dir+0xc5c/0x4870 fs/ocfs2/dir.c:3200 ocfs2_prepare_dir_for_insert+0x2e0a/0x5240 fs/ocfs2/dir.c:4321 ocfs2_mknod+0x864/0x22b0 fs/ocfs2/namei.c:294 ocfs2_create+0x192/0x410 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3470 [inline] open_last_lookups fs/namei.c:3540 [inline] path_openat+0x11e1/0x2f30 fs/namei.c:3747 do_filp_open+0x1b3/0x3e0 fs/namei.c:3777 do_sys_openat2+0x142/0x4a0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_creat fs/open.c:1345 [inline] __se_sys_creat fs/open.c:1339 [inline] __x64_sys_creat+0x8c/0xb0 fs/open.c:1339 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_file_ip_alloc_sem_key); lock(&osb->system_file_mutex); lock(&ocfs2_file_ip_alloc_sem_key); lock(&osb->system_file_mutex); *** DEADLOCK *** 3 locks held by syz.1.95/4620: #0: ffff88801f95a460 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386 #1: ffff8880508209c8 (&type->i_mutex_dir_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff8880508209c8 (&type->i_mutex_dir_key#13){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff8880508209c8 (&type->i_mutex_dir_key#13){+.+.}-{3:3}, at: path_openat+0x7f3/0x2f30 fs/namei.c:3747 #2: ffff888050820660 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_expand_inline_dir fs/ocfs2/dir.c:2819 [inline] #2: ffff888050820660 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_extend_dir+0x64b/0x4870 fs/ocfs2/dir.c:3200 stack backtrace: CPU: 1 PID: 4620 Comm: syz.1.95 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 ocfs2_get_system_file_inode+0x1b5/0x760 fs/ocfs2/sysfile.c:101 ocfs2_reserve_suballoc_bits+0x139/0x4350 fs/ocfs2/suballoc.c:776 ocfs2_reserve_new_metadata_blocks+0x400/0x940 fs/ocfs2/suballoc.c:978 ocfs2_expand_inline_dir fs/ocfs2/dir.c:2838 [inline] ocfs2_extend_dir+0xc5c/0x4870 fs/ocfs2/dir.c:3200 ocfs2_prepare_dir_for_insert+0x2e0a/0x5240 fs/ocfs2/dir.c:4321 ocfs2_mknod+0x864/0x22b0 fs/ocfs2/namei.c:294 ocfs2_create+0x192/0x410 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3470 [inline] open_last_lookups fs/namei.c:3540 [inline] path_openat+0x11e1/0x2f30 fs/namei.c:3747 do_filp_open+0x1b3/0x3e0 fs/namei.c:3777 do_sys_openat2+0x142/0x4a0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_creat fs/open.c:1345 [inline] __se_sys_creat fs/open.c:1339 [inline] __x64_sys_creat+0x8c/0xb0 fs/open.c:1339 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fc3a4b5b749 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:00007fc3a2dc2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fc3a4db1fa0 RCX: 00007fc3a4b5b749 RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000200000000100 RBP: 00007fc3a4bdff91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc3a4db2038 R14: 00007fc3a4db1fa0 R15: 00007ffed5c72628 OCFS2: ERROR (device loop1): int ocfs2_validate_gd_parent(struct super_block *, struct ocfs2_dinode *, struct buffer_head *, int): Group descriptor #32 has bit count of 1024 On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. OCFS2: File system is now read-only. (syz.1.95,4620,0):ocfs2_search_chain:1761 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_search_chain:1871 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_claim_suballoc_bits:1940 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_claim_suballoc_bits:1983 ERROR: status = -30 (syz.1.95,4620,0):__ocfs2_claim_clusters:2355 ERROR: status = -30 (syz.1.95,4620,0):__ocfs2_claim_clusters:2363 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_block_group_alloc_contig:433 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_block_group_alloc:705 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_block_group_alloc:758 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_reserve_suballoc_bits:833 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_reserve_suballoc_bits:850 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_reserve_new_metadata_blocks:990 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_reserve_new_metadata_blocks:1013 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_expand_inline_dir:2840 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_extend_dir:3204 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_prepare_dir_for_insert:4325 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_mknod:298 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_mknod:502 ERROR: status = -30 (syz.1.95,4620,0):ocfs2_create:676 ERROR: status = -30 syz.1.95 (4620) used greatest stack depth: 18064 bytes left