====================================================== WARNING: possible circular locking dependency detected 6.1.111-syzkaller #0 Not tainted ------------------------------------------------------ syz.4.153/4976 is trying to acquire lock: ffff0000eef81488 (&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: ffff0000e18d0660 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_write_begin+0x178/0x38c fs/ocfs2/aops.c:1903 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+0x64/0x308 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x2bc/0x9f8 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/0x2620 fs/ocfs2/dir.c:1080 ocfs2_find_files_on_disk+0x130/0x468 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:457 ocfs2_initialize_super fs/ocfs2/super.c:2250 [inline] ocfs2_fill_super+0x278c/0x4a0c fs/ocfs2/super.c:994 mount_bdev+0x274/0x370 fs/super.c:1443 ocfs2_mount+0x44/0x58 fs/ocfs2/super.c:1186 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632 vfs_get_tree+0x90/0x274 fs/super.c:1573 do_new_mount+0x278/0x8fc fs/namespace.c:3051 path_mount+0x590/0xe5c fs/namespace.c:3381 do_mount fs/namespace.c:3394 [inline] __do_sys_mount fs/namespace.c:3602 [inline] __se_sys_mount fs/namespace.c:3579 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3579 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 -> #0 (&osb->system_file_mutex){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x3338/0x7680 kernel/locking/lockdep.c:5049 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 ocfs2_get_system_file_inode+0x180/0x6b8 fs/ocfs2/sysfile.c:101 ocfs2_reserve_local_alloc_bits+0xe4/0x25dc fs/ocfs2/localalloc.c:626 ocfs2_reserve_clusters_with_limit+0x194/0xabc fs/ocfs2/suballoc.c:1162 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline] ocfs2_lock_allocators+0x294/0x584 fs/ocfs2/suballoc.c:2669 ocfs2_write_begin_nolock+0x22fc/0x3f6c fs/ocfs2/aops.c:1741 ocfs2_write_begin+0x1ac/0x38c fs/ocfs2/aops.c:1905 generic_perform_write+0x278/0x55c mm/filemap.c:3817 __generic_file_write_iter+0x168/0x388 mm/filemap.c:3945 ocfs2_file_write_iter+0x15ac/0x1fbc fs/ocfs2/file.c:2456 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x610/0x91c fs/read_write.c:584 ksys_write+0x15c/0x26c fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 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 *** 4 locks held by syz.4.153/4976: #0: ffff0000cb5cb4e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x124/0x16c fs/file.c:1058 #1: ffff0000eedd4460 (sb_writers#18){.+.+}-{0:0}, at: vfs_write+0x244/0x91c fs/read_write.c:580 #2: ffff0000e18d09c8 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #2: ffff0000e18d09c8 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: ocfs2_file_write_iter+0x3b4/0x1fbc fs/ocfs2/file.c:2388 #3: ffff0000e18d0660 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_write_begin+0x178/0x38c fs/ocfs2/aops.c:1903 stack backtrace: CPU: 0 PID: 4976 Comm: syz.4.153 Not tainted 6.1.111-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __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:2048 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x3338/0x7680 kernel/locking/lockdep.c:5049 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 ocfs2_get_system_file_inode+0x180/0x6b8 fs/ocfs2/sysfile.c:101 ocfs2_reserve_local_alloc_bits+0xe4/0x25dc fs/ocfs2/localalloc.c:626 ocfs2_reserve_clusters_with_limit+0x194/0xabc fs/ocfs2/suballoc.c:1162 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline] ocfs2_lock_allocators+0x294/0x584 fs/ocfs2/suballoc.c:2669 ocfs2_write_begin_nolock+0x22fc/0x3f6c fs/ocfs2/aops.c:1741 ocfs2_write_begin+0x1ac/0x38c fs/ocfs2/aops.c:1905 generic_perform_write+0x278/0x55c mm/filemap.c:3817 __generic_file_write_iter+0x168/0x388 mm/filemap.c:3945 ocfs2_file_write_iter+0x15ac/0x1fbc fs/ocfs2/file.c:2456 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x610/0x91c fs/read_write.c:584 ksys_write+0x15c/0x26c fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 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.4.153,4976,1):ocfs2_claim_suballoc_bits:1983 ERROR: status = -5 (syz.4.153,4976,1):__ocfs2_claim_clusters:2355 ERROR: status = -5 (syz.4.153,4976,1):__ocfs2_claim_clusters:2363 ERROR: status = -5 (syz.4.153,4976,1):ocfs2_local_alloc_new_window:1203 ERROR: status = -5 (syz.4.153,4976,1):ocfs2_local_alloc_new_window:1228 ERROR: status = -5 (syz.4.153,4976,1):ocfs2_local_alloc_slide_window:1302 ERROR: status = -5 (syz.4.153,4976,1):ocfs2_local_alloc_slide_window:1321 ERROR: status = -5 (syz.4.153,4976,1):ocfs2_reserve_local_alloc_bits:671 ERROR: status = -5 (syz.4.153,4976,1):ocfs2_reserve_local_alloc_bits:709 ERROR: status = -5 (syz.4.153,4976,1):ocfs2_reserve_clusters_with_limit:1166 ERROR: status = -5 (syz.4.153,4976,1):ocfs2_reserve_clusters_with_limit:1215 ERROR: status = -5 (syz.4.153,4976,1):ocfs2_lock_allocators:2672 ERROR: status = -5 (syz.4.153,4976,1):ocfs2_write_begin_nolock:1745 ERROR: status = -5 (syz.4.153,4976,1):ocfs2_write_begin:1908 ERROR: status = -5