====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.2.566/6411 is trying to acquire lock: ffff0000dd185488 (&osb->system_file_mutex){+.+.}-{3:3}, at: ocfs2_get_system_file_inode+0x158/0x690 fs/ocfs2/sysfile.c:101 but task is already holding lock: ffff0000fec70660 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_write_begin+0x194/0x31c fs/ocfs2/aops.c:1902 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+0x64/0x300 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x238/0x8f0 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+0x2e4/0x1d6c fs/ocfs2/dir.c:1091 ocfs2_find_files_on_disk+0x128/0x40c fs/ocfs2/dir.c:1995 ocfs2_lookup_ino_from_name+0x60/0x114 fs/ocfs2/dir.c:2017 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:136 [inline] ocfs2_get_system_file_inode+0x2c0/0x690 fs/ocfs2/sysfile.c:112 ocfs2_init_global_system_inodes+0x2a0/0x5c8 fs/ocfs2/super.c:457 ocfs2_initialize_super fs/ocfs2/super.c:2253 [inline] ocfs2_fill_super+0x2408/0x436c fs/ocfs2/super.c:994 mount_bdev+0x264/0x358 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+0x228/0x810 fs/namespace.c:3078 path_mount+0x5bc/0xe80 fs/namespace.c:3408 do_mount fs/namespace.c:3421 [inline] __do_sys_mount fs/namespace.c:3629 [inline] __se_sys_mount fs/namespace.c:3606 [inline] __arm64_sys_mount+0x49c/0x59c fs/namespace.c:3606 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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+0x2880/0x6800 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662 __mutex_lock_common+0x190/0x1f60 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+0x158/0x690 fs/ocfs2/sysfile.c:101 ocfs2_reserve_local_alloc_bits+0xd0/0x26c8 fs/ocfs2/localalloc.c:626 ocfs2_reserve_clusters_with_limit+0x188/0xa28 fs/ocfs2/suballoc.c:1162 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline] ocfs2_lock_allocators+0x270/0x530 fs/ocfs2/suballoc.c:2679 ocfs2_extend_allocation+0x354/0x16d4 fs/ocfs2/file.c:585 ocfs2_extend_no_holes+0x1a4/0x438 fs/ocfs2/file.c:1027 ocfs2_expand_nonsparse_inode+0x134/0x3ac fs/ocfs2/aops.c:1621 ocfs2_write_begin_nolock+0xec8/0x3a44 fs/ocfs2/aops.c:1687 ocfs2_write_begin+0x1b8/0x31c fs/ocfs2/aops.c:1904 generic_perform_write+0x234/0x4f4 mm/filemap.c:3862 __generic_file_write_iter+0x130/0x250 mm/filemap.c:3960 ocfs2_file_write_iter+0x138c/0x1c64 fs/ocfs2/file.c:2469 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x3ec/0x7f0 fs/read_write.c:584 ksys_pwrite64 fs/read_write.c:699 [inline] __do_sys_pwrite64 fs/read_write.c:709 [inline] __se_sys_pwrite64 fs/read_write.c:706 [inline] __arm64_sys_pwrite64+0x174/0x20c fs/read_write.c:706 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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 *** 3 locks held by syz.2.566/6411: #0: ffff0000f5f30460 (sb_writers#28){.+.+}-{0:0}, at: vfs_write+0x244/0x7f0 fs/read_write.c:580 #1: ffff0000fec709c8 (&sb->s_type->i_mutex_key#40){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff0000fec709c8 (&sb->s_type->i_mutex_key#40){+.+.}-{3:3}, at: ocfs2_file_write_iter+0x39c/0x1c64 fs/ocfs2/file.c:2399 #2: ffff0000fec70660 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_write_begin+0x194/0x31c fs/ocfs2/aops.c:1902 stack backtrace: CPU: 1 PID: 6411 Comm: syz.2.566 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: dump_backtrace+0x1c0/0x1ec arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2048 check_noncircular+0x264/0x2f8 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+0x2880/0x6800 kernel/locking/lockdep.c:5049 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662 __mutex_lock_common+0x190/0x1f60 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+0x158/0x690 fs/ocfs2/sysfile.c:101 ocfs2_reserve_local_alloc_bits+0xd0/0x26c8 fs/ocfs2/localalloc.c:626 ocfs2_reserve_clusters_with_limit+0x188/0xa28 fs/ocfs2/suballoc.c:1162 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline] ocfs2_lock_allocators+0x270/0x530 fs/ocfs2/suballoc.c:2679 ocfs2_extend_allocation+0x354/0x16d4 fs/ocfs2/file.c:585 ocfs2_extend_no_holes+0x1a4/0x438 fs/ocfs2/file.c:1027 ocfs2_expand_nonsparse_inode+0x134/0x3ac fs/ocfs2/aops.c:1621 ocfs2_write_begin_nolock+0xec8/0x3a44 fs/ocfs2/aops.c:1687 ocfs2_write_begin+0x1b8/0x31c fs/ocfs2/aops.c:1904 generic_perform_write+0x234/0x4f4 mm/filemap.c:3862 __generic_file_write_iter+0x130/0x250 mm/filemap.c:3960 ocfs2_file_write_iter+0x138c/0x1c64 fs/ocfs2/file.c:2469 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x3ec/0x7f0 fs/read_write.c:584 ksys_pwrite64 fs/read_write.c:699 [inline] __do_sys_pwrite64 fs/read_write.c:709 [inline] __se_sys_pwrite64 fs/read_write.c:706 [inline] __arm64_sys_pwrite64+0x174/0x20c fs/read_write.c:706 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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 loop2): int ocfs2_validate_gd_self(struct super_block *, struct buffer_head *, int): Group descriptor #32 has an invalid fs_generation of #1 On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. OCFS2: File system is now read-only. (syz.2.566,6411,1):ocfs2_search_chain:1761 ERROR: status = -30 (syz.2.566,6411,1):ocfs2_search_chain:1871 ERROR: status = -30 (syz.2.566,6411,1):ocfs2_claim_suballoc_bits:1950 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_claim_suballoc_bits:1993 ERROR: status = -30 (syz.2.566,6411,0):__ocfs2_claim_clusters:2365 ERROR: status = -30 (syz.2.566,6411,0):__ocfs2_claim_clusters:2373 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_local_alloc_new_window:1203 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_local_alloc_new_window:1228 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_local_alloc_slide_window:1302 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_local_alloc_slide_window:1321 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_reserve_local_alloc_bits:671 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_reserve_local_alloc_bits:709 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_reserve_clusters_with_limit:1166 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_reserve_clusters_with_limit:1215 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_lock_allocators:2682 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_extend_allocation:588 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_extend_no_holes:1030 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_expand_nonsparse_inode:1623 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_write_begin_nolock:1690 ERROR: status = -30 (syz.2.566,6411,0):ocfs2_write_begin:1907 ERROR: status = -30