====================================================== WARNING: possible circular locking dependency detected 5.15.167-syzkaller #0 Not tainted ------------------------------------------------------ syz.4.563/5740 is trying to acquire lock: ffff0000cf021488 (&osb->system_file_mutex){+.+.}-{3:3}, at: ocfs2_get_system_file_inode+0x180/0x6b8 fs/ocfs2/sysfile.c:101 but task is already holding lock: ffff0000e6814da0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_page_mkwrite+0x400/0xf0c fs/ocfs2/mmap.c:142 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+0xc0/0x398 kernel/locking/rwsem.c:1498 ocfs2_read_virt_blocks+0x298/0x960 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+0x3ac/0x2450 fs/ocfs2/dir.c:1080 ocfs2_find_files_on_disk+0x10c/0x3d0 fs/ocfs2/dir.c:1982 ocfs2_lookup_ino_from_name+0xb8/0x1d4 fs/ocfs2/dir.c:2004 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:136 [inline] ocfs2_get_system_file_inode+0x2c8/0x6b8 fs/ocfs2/sysfile.c:112 ocfs2_init_global_system_inodes+0x2bc/0x618 fs/ocfs2/super.c:458 ocfs2_initialize_super fs/ocfs2/super.c:2276 [inline] ocfs2_fill_super+0x394c/0x498c fs/ocfs2/super.c:995 mount_bdev+0x274/0x370 fs/super.c:1398 ocfs2_mount+0x44/0x58 fs/ocfs2/super.c:1187 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611 vfs_get_tree+0x90/0x274 fs/super.c:1528 do_new_mount+0x278/0x8fc fs/namespace.c:3005 path_mount+0x594/0x101c fs/namespace.c:3335 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount fs/namespace.c:3533 [inline] __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3533 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #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+0x32d4/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 ocfs2_get_system_file_inode+0x180/0x6b8 fs/ocfs2/sysfile.c:101 ocfs2_reserve_local_alloc_bits+0xe4/0x2474 fs/ocfs2/localalloc.c:626 ocfs2_reserve_clusters_with_limit+0x194/0xabc fs/ocfs2/suballoc.c:1162 ocfs2_reserve_clusters+0x3c/0x50 fs/ocfs2/suballoc.c:1223 ocfs2_convert_inline_data_to_extents+0x22c/0x12fc fs/ocfs2/alloc.c:7064 ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1565 [inline] ocfs2_write_begin_nolock+0x81c/0x3e1c fs/ocfs2/aops.c:1672 __ocfs2_page_mkwrite fs/ocfs2/mmap.c:93 [inline] ocfs2_page_mkwrite+0x6b0/0xf0c fs/ocfs2/mmap.c:144 do_page_mkwrite+0x144/0x37c mm/memory.c:2892 do_shared_fault mm/memory.c:4298 [inline] do_fault mm/memory.c:4366 [inline] handle_pte_fault mm/memory.c:4620 [inline] __handle_mm_fault mm/memory.c:4755 [inline] handle_mm_fault+0x1a10/0x33a8 mm/memory.c:4853 __do_page_fault arch/arm64/mm/fault.c:505 [inline] do_page_fault+0x700/0xb60 arch/arm64/mm/fault.c:605 do_translation_fault+0xe8/0x138 arch/arm64/mm/fault.c:686 do_mem_abort+0x70/0x1d8 arch/arm64/mm/fault.c:819 el0_da+0x94/0x20c arch/arm64/kernel/entry-common.c:494 el0t_64_sync_handler+0xc0/0xe4 arch/arm64/kernel/entry-common.c:629 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 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.4.563/5740: #0: ffff0000d8c31818 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff0000d8c31818 (&mm->mmap_lock){++++}-{3:3}, at: do_page_fault+0x380/0xb60 arch/arm64/mm/fault.c:586 #1: ffff0000c1af4558 (sb_pagefaults#3){.+.+}-{0:0}, at: do_page_mkwrite+0x144/0x37c mm/memory.c:2892 #2: ffff0000e6814da0 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_page_mkwrite+0x400/0xf0c fs/ocfs2/mmap.c:142 stack backtrace: CPU: 1 PID: 5740 Comm: syz.4.563 Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2011 check_noncircular+0x2cc/0x378 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+0x32d4/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 ocfs2_get_system_file_inode+0x180/0x6b8 fs/ocfs2/sysfile.c:101 ocfs2_reserve_local_alloc_bits+0xe4/0x2474 fs/ocfs2/localalloc.c:626 ocfs2_reserve_clusters_with_limit+0x194/0xabc fs/ocfs2/suballoc.c:1162 ocfs2_reserve_clusters+0x3c/0x50 fs/ocfs2/suballoc.c:1223 ocfs2_convert_inline_data_to_extents+0x22c/0x12fc fs/ocfs2/alloc.c:7064 ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1565 [inline] ocfs2_write_begin_nolock+0x81c/0x3e1c fs/ocfs2/aops.c:1672 __ocfs2_page_mkwrite fs/ocfs2/mmap.c:93 [inline] ocfs2_page_mkwrite+0x6b0/0xf0c fs/ocfs2/mmap.c:144 do_page_mkwrite+0x144/0x37c mm/memory.c:2892 do_shared_fault mm/memory.c:4298 [inline] do_fault mm/memory.c:4366 [inline] handle_pte_fault mm/memory.c:4620 [inline] __handle_mm_fault mm/memory.c:4755 [inline] handle_mm_fault+0x1a10/0x33a8 mm/memory.c:4853 __do_page_fault arch/arm64/mm/fault.c:505 [inline] do_page_fault+0x700/0xb60 arch/arm64/mm/fault.c:605 do_translation_fault+0xe8/0x138 arch/arm64/mm/fault.c:686 do_mem_abort+0x70/0x1d8 arch/arm64/mm/fault.c:819 el0_da+0x94/0x20c arch/arm64/kernel/entry-common.c:494 el0t_64_sync_handler+0xc0/0xe4 arch/arm64/kernel/entry-common.c:629 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 OCFS2: ERROR (device loop4): 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.4.563,5740,1):ocfs2_claim_suballoc_bits:1983 ERROR: status = -5 (syz.4.563,5740,1):__ocfs2_claim_clusters:2355 ERROR: status = -5 (syz.4.563,5740,1):__ocfs2_claim_clusters:2363 ERROR: status = -5 (syz.4.563,5740,0):ocfs2_local_alloc_new_window:1203 ERROR: status = -5 (syz.4.563,5740,0):ocfs2_local_alloc_new_window:1228 ERROR: status = -5 (syz.4.563,5740,1):ocfs2_local_alloc_slide_window:1302 ERROR: status = -5 (syz.4.563,5740,1):ocfs2_local_alloc_slide_window:1321 ERROR: status = -5 (syz.4.563,5740,1):ocfs2_reserve_local_alloc_bits:671 ERROR: status = -5 (syz.4.563,5740,1):ocfs2_reserve_local_alloc_bits:709 ERROR: status = -5 (syz.4.563,5740,1):ocfs2_reserve_clusters_with_limit:1166 ERROR: status = -5 (syz.4.563,5740,1):ocfs2_reserve_clusters_with_limit:1215 ERROR: status = -5 (syz.4.563,5740,1):ocfs2_convert_inline_data_to_extents:7066 ERROR: status = -5 (syz.4.563,5740,1):ocfs2_try_to_write_inline_data:1567 ERROR: status = -5 (syz.4.563,5740,1):ocfs2_write_begin_nolock:1679 ERROR: status = -5 (syz.4.563,5740,1):__ocfs2_page_mkwrite:97 ERROR: status = -5