====================================================== WARNING: possible circular locking dependency detected 5.15.169-syzkaller #0 Not tainted ------------------------------------------------------ syz.3.203/5000 is trying to acquire lock: ffff888024b39488 (&osb->system_file_mutex){+.+.}-{3:3}, at: ocfs2_get_system_file_inode+0x1a1/0x7b0 fs/ocfs2/sysfile.c:101 but task is already holding lock: ffff888062c63f60 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: __ocfs2_change_file_space+0x7f6/0xf60 fs/ocfs2/file.c:2007 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}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_read+0x45/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_read_virt_blocks+0x2b3/0xa10 fs/ocfs2/extent_map.c:976 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x437/0x26d0 fs/ocfs2/dir.c:1080 ocfs2_find_files_on_disk+0xea/0x310 fs/ocfs2/dir.c:1982 ocfs2_lookup_ino_from_name+0xad/0x1e0 fs/ocfs2/dir.c:2004 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:136 [inline] ocfs2_get_system_file_inode+0x314/0x7b0 fs/ocfs2/sysfile.c:112 ocfs2_init_global_system_inodes+0x328/0x720 fs/ocfs2/super.c:458 ocfs2_initialize_super fs/ocfs2/super.c:2276 [inline] ocfs2_fill_super+0x479e/0x58a0 fs/ocfs2/super.c:995 mount_bdev+0x2c9/0x3f0 fs/super.c:1400 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x2ba/0xb40 fs/namespace.c:3012 do_mount fs/namespace.c:3355 [inline] __do_sys_mount fs/namespace.c:3563 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 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+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 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+0x1a1/0x7b0 fs/ocfs2/sysfile.c:101 ocfs2_reserve_suballoc_bits+0x16b/0x4c70 fs/ocfs2/suballoc.c:776 ocfs2_reserve_new_metadata_blocks+0x418/0x9b0 fs/ocfs2/suballoc.c:978 ocfs2_reserve_new_metadata fs/ocfs2/suballoc.c:1021 [inline] ocfs2_lock_allocators+0x2a5/0x620 fs/ocfs2/suballoc.c:2658 ocfs2_extend_allocation+0x4e8/0x1ba0 fs/ocfs2/file.c:588 ocfs2_allocate_unwritten_extents+0x394/0x9e0 fs/ocfs2/file.c:1496 __ocfs2_change_file_space+0x8ce/0xf60 fs/ocfs2/file.c:2015 ocfs2_fallocate+0x2dc/0x350 fs/ocfs2/file.c:2130 vfs_fallocate+0x54a/0x6b0 fs/open.c:308 ksys_fallocate fs/open.c:331 [inline] __do_sys_fallocate fs/open.c:339 [inline] __se_sys_fallocate fs/open.c:337 [inline] __x64_sys_fallocate+0xb9/0x100 fs/open.c:337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 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.3.203/5000: #0: ffff88805e792460 (sb_writers#16){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3044 [inline] #0: ffff88805e792460 (sb_writers#16){.+.+}-{0:0}, at: vfs_fallocate+0x4bd/0x6b0 fs/open.c:307 #1: ffff888062c642c8 (&sb->s_type->i_mutex_key#24){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] #1: ffff888062c642c8 (&sb->s_type->i_mutex_key#24){+.+.}-{3:3}, at: __ocfs2_change_file_space+0x1fe/0xf60 fs/ocfs2/file.c:1941 #2: ffff888062c63f60 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: __ocfs2_change_file_space+0x7f6/0xf60 fs/ocfs2/file.c:2007 stack backtrace: CPU: 1 PID: 5000 Comm: syz.3.203 Not tainted 5.15.169-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 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+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 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+0x1a1/0x7b0 fs/ocfs2/sysfile.c:101 ocfs2_reserve_suballoc_bits+0x16b/0x4c70 fs/ocfs2/suballoc.c:776 ocfs2_reserve_new_metadata_blocks+0x418/0x9b0 fs/ocfs2/suballoc.c:978 ocfs2_reserve_new_metadata fs/ocfs2/suballoc.c:1021 [inline] ocfs2_lock_allocators+0x2a5/0x620 fs/ocfs2/suballoc.c:2658 ocfs2_extend_allocation+0x4e8/0x1ba0 fs/ocfs2/file.c:588 ocfs2_allocate_unwritten_extents+0x394/0x9e0 fs/ocfs2/file.c:1496 __ocfs2_change_file_space+0x8ce/0xf60 fs/ocfs2/file.c:2015 ocfs2_fallocate+0x2dc/0x350 fs/ocfs2/file.c:2130 vfs_fallocate+0x54a/0x6b0 fs/open.c:308 ksys_fallocate fs/open.c:331 [inline] __do_sys_fallocate fs/open.c:339 [inline] __se_sys_fallocate fs/open.c:337 [inline] __x64_sys_fallocate+0xb9/0x100 fs/open.c:337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f514f6cc719 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:00007f514db23038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f514f884058 RCX: 00007f514f6cc719 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f514f73f32e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000040002 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f514f884058 R15: 00007fff58a7d838 OCFS2: ERROR (device loop3): int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *, handle_t *, u32, u32, struct ocfs2_suballoc_result *): Chain allocator dinode 23 has 4294967295 used bits but only 16777215 total On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. OCFS2: Returning error to the calling process. (syz.3.203,5000,0):ocfs2_claim_suballoc_bits:1983 ERROR: status = -5 (syz.3.203,5000,0):__ocfs2_claim_clusters:2355 ERROR: status = -5 (syz.3.203,5000,0):__ocfs2_claim_clusters:2363 ERROR: status = -5 (syz.3.203,5000,0):ocfs2_block_group_alloc_contig:433 ERROR: status = -5 (syz.3.203,5000,0):ocfs2_block_group_alloc:705 ERROR: status = -5 (syz.3.203,5000,0):ocfs2_block_group_alloc:758 ERROR: status = -5 (syz.3.203,5000,0):ocfs2_reserve_suballoc_bits:833 ERROR: status = -5 (syz.3.203,5000,0):ocfs2_reserve_suballoc_bits:850 ERROR: status = -5 (syz.3.203,5000,0):ocfs2_reserve_new_metadata_blocks:990 ERROR: status = -5 (syz.3.203,5000,1):ocfs2_reserve_new_metadata_blocks:1013 ERROR: status = -5 (syz.3.203,5000,1):ocfs2_lock_allocators:2661 ERROR: status = -5 (syz.3.203,5000,1):ocfs2_extend_allocation:591 ERROR: status = -5 (syz.3.203,5000,1):ocfs2_allocate_unwritten_extents:1499 ERROR: status = -5 (syz.3.203,5000,1):__ocfs2_change_file_space:2037 ERROR: status = -5