====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.1.296/5361 is trying to acquire lock: ffff0000d6ce6650 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_write_begin_inline fs/ocfs2/aops.c:1481 [inline] ffff0000d6ce6650 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1584 [inline] ffff0000d6ce6650 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_write_begin_nolock+0x920/0x3a44 fs/ocfs2/aops.c:1670 but task is already holding lock: ffff000100528660 (&oi->ip_alloc_sem){++++}-{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: -> #2 (&oi->ip_alloc_sem){++++}-{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+0xd4/0x46c fs/ocfs2/dir.c:508 ocfs2_dir_foreach_blk_el fs/ocfs2/dir.c:1842 [inline] ocfs2_dir_foreach_blk+0x214/0x16b0 fs/ocfs2/dir.c:1928 ocfs2_dir_foreach+0x168/0x1c0 fs/ocfs2/dir.c:1938 ocfs2_empty_dir+0xf4/0x590 fs/ocfs2/dir.c:2156 ocfs2_rename+0x1bf8/0x30b4 fs/ocfs2/namei.c:1499 vfs_rename+0x95c/0xde0 fs/namei.c:4882 do_renameat2+0x744/0xa74 fs/namei.c:5035 __do_sys_renameat2 fs/namei.c:5068 [inline] __se_sys_renameat2 fs/namei.c:5065 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5065 __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 -> #1 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x64/0x300 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x374/0x6cc fs/ocfs2/journal.c:374 ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1258 [inline] ocfs2_reserve_local_alloc_bits+0xb48/0x26c8 fs/ocfs2/localalloc.c:668 ocfs2_reserve_clusters_with_limit+0x188/0xa28 fs/ocfs2/suballoc.c:1162 ocfs2_reserve_clusters+0x3c/0x50 fs/ocfs2/suballoc.c:1223 ocfs2_mknod+0xcc8/0x2110 fs/ocfs2/namei.c:354 ocfs2_mkdir+0x19c/0x4f8 fs/ocfs2/namei.c:657 vfs_mkdir+0x314/0x4d4 fs/namei.c:4114 do_mkdirat+0x1b8/0x3ec fs/namei.c:4139 __do_sys_mkdirat fs/namei.c:4154 [inline] __se_sys_mkdirat fs/namei.c:4152 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152 __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 (sb_internal#4){.+.+}-{0:0}: 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 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1891 [inline] sb_start_intwrite include/linux/fs.h:2013 [inline] ocfs2_start_trans+0x20c/0x6cc fs/ocfs2/journal.c:372 ocfs2_write_begin_inline fs/ocfs2/aops.c:1481 [inline] ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1584 [inline] ocfs2_write_begin_nolock+0x920/0x3a44 fs/ocfs2/aops.c:1670 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_write+0x12c/0x224 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+0x98/0x2b4 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: Chain exists of: sb_internal#4 --> &journal->j_trans_barrier --> &oi->ip_alloc_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_alloc_sem); lock(&journal->j_trans_barrier); lock(&oi->ip_alloc_sem); lock(sb_internal#4); *** DEADLOCK *** 4 locks held by syz.1.296/5361: #0: ffff0000caa40d68 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x114/0x16c fs/file.c:1038 #1: ffff0000d6ce6460 (sb_writers#20){.+.+}-{0:0}, at: vfs_write+0x244/0x7f0 fs/read_write.c:580 #2: ffff0001005289c8 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #2: ffff0001005289c8 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: ocfs2_file_write_iter+0x39c/0x1c64 fs/ocfs2/file.c:2399 #3: ffff000100528660 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_write_begin+0x194/0x31c fs/ocfs2/aops.c:1902 stack backtrace: CPU: 0 PID: 5361 Comm: syz.1.296 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 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1891 [inline] sb_start_intwrite include/linux/fs.h:2013 [inline] ocfs2_start_trans+0x20c/0x6cc fs/ocfs2/journal.c:372 ocfs2_write_begin_inline fs/ocfs2/aops.c:1481 [inline] ocfs2_try_to_write_inline_data fs/ocfs2/aops.c:1584 [inline] ocfs2_write_begin_nolock+0x920/0x3a44 fs/ocfs2/aops.c:1670 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_write+0x12c/0x224 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+0x98/0x2b4 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