ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.44/4589 is trying to acquire lock: ffff0000e19b94a0 (&oi->ip_alloc_sem){++++}-{3:3}, at: ocfs2_read_virt_blocks+0x23c/0x8c8 fs/ocfs2/extent_map.c:984 but task is already holding lock: ffff0000f4c9d4e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x38c/0x6f4 fs/ocfs2/journal.c:374 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x64/0x300 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x38c/0x6f4 fs/ocfs2/journal.c:374 ocfs2_shutdown_local_alloc+0x1a0/0x858 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1f4/0x95c fs/ocfs2/super.c:1882 ocfs2_put_super+0x108/0x390 fs/ocfs2/super.c:1609 generic_shutdown_super+0x138/0x32c fs/super.c:501 kill_block_super+0x78/0xe0 fs/super.c:1470 deactivate_locked_super+0xb4/0x128 fs/super.c:332 deactivate_super+0xe4/0x104 fs/super.c:363 cleanup_mnt+0x3a8/0x430 fs/namespace.c:1191 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198 task_work_run+0x1f4/0x280 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x20f8/0x2c84 arch/arm64/kernel/signal.c:1151 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x98/0x128 arch/arm64/kernel/entry-common.c:638 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 (sb_internal#2){.+.+}-{0:0}: 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/0x6f4 fs/ocfs2/journal.c:372 ocfs2_setattr+0xb04/0x1950 fs/ocfs2/file.c:1263 notify_change+0xb5c/0xe20 fs/attr.c:499 ovl_do_notify_change fs/overlayfs/overlayfs.h:142 [inline] ovl_workdir_create+0x4d4/0x66c fs/overlayfs/super.c:833 ovl_make_workdir fs/overlayfs/super.c:1389 [inline] ovl_get_workdir+0x31c/0x1084 fs/overlayfs/super.c:1539 ovl_fill_super+0x17d0/0x3938 fs/overlayfs/super.c:2095 mount_nodev+0x68/0x108 fs/super.c:1489 ovl_mount+0x3c/0x50 fs/overlayfs/super.c:2186 legacy_get_tree+0xd8/0x174 fs/fs_context.c:632 vfs_get_tree+0x90/0x278 fs/super.c:1573 do_new_mount+0x228/0x804 fs/namespace.c:3078 path_mount+0x5ac/0xe6c 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+0x4a0/0x5a0 fs/namespace.c:3606 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 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 (&oi->ip_alloc_sem){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3095 [inline] check_prevs_add kernel/locking/lockdep.c:3214 [inline] validate_chain kernel/locking/lockdep.c:3830 [inline] __lock_acquire+0x2808/0x6634 kernel/locking/lockdep.c:5063 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676 down_read+0x64/0x300 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x23c/0x8c8 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+0x314/0x1d90 fs/ocfs2/dir.c:1091 ocfs2_rename+0x19c8/0x3160 fs/ocfs2/namei.c:1568 vfs_rename+0xb08/0xe3c fs/namei.c:4882 do_renameat2+0x760/0xaa4 fs/namei.c:5035 __do_sys_renameat2 fs/namei.c:5068 [inline] __se_sys_renameat2 fs/namei.c:5065 [inline] __arm64_sys_renameat2+0xe8/0x104 fs/namei.c:5065 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 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: &oi->ip_alloc_sem --> sb_internal#2 --> &journal->j_trans_barrier Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&journal->j_trans_barrier); lock(sb_internal#2); lock(&journal->j_trans_barrier); lock(&oi->ip_alloc_sem); *** DEADLOCK *** 8 locks held by syz.0.44/4589: #0: ffff0000dc112460 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402 #1: ffff0000dc112748 (&type->s_vfs_rename_key){+.+.}-{3:3}, at: lock_rename fs/namei.c:3046 [inline] #1: ffff0000dc112748 (&type->s_vfs_rename_key){+.+.}-{3:3}, at: do_renameat2+0x314/0xaa4 fs/namei.c:4974 #2: ffff0000e19edf48 (&type->i_mutex_dir_key#9/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #2: ffff0000e19edf48 (&type->i_mutex_dir_key#9/1){+.+.}-{3:3}, at: lock_two_directories fs/namei.c:-1 [inline] #2: ffff0000e19edf48 (&type->i_mutex_dir_key#9/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3047 [inline] #2: ffff0000e19edf48 (&type->i_mutex_dir_key#9/1){+.+.}-{3:3}, at: do_renameat2+0x390/0xaa4 fs/namei.c:4974 #3: ffff0000e19b9808 (&sb->s_type->i_mutex_key#21/5){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline] #3: ffff0000e19b9808 (&sb->s_type->i_mutex_key#21/5){+.+.}-{3:3}, at: do_renameat2+0x3c4/0xaa4 fs/namei.c:4974 #4: ffff0000f743ed88 (&sb->s_type->i_mutex_key#22/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #4: ffff0000f743ed88 (&sb->s_type->i_mutex_key#22/2){+.+.}-{3:3}, at: vfs_rename+0x648/0xe3c fs/namei.c:4845 #5: ffff0000dc112650 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_rename+0x1638/0x3160 fs/ocfs2/namei.c:1488 #6: ffff0000f4c9d4e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x38c/0x6f4 fs/ocfs2/journal.c:374 #7: ffff0000f4892990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfec/0x125c fs/jbd2/transaction.c:461 stack backtrace: CPU: 1 PID: 4589 Comm: syz.0.44 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 Call trace: dump_backtrace+0x1c4/0x1f0 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:3095 [inline] check_prevs_add kernel/locking/lockdep.c:3214 [inline] validate_chain kernel/locking/lockdep.c:3830 [inline] __lock_acquire+0x2808/0x6634 kernel/locking/lockdep.c:5063 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676 down_read+0x64/0x300 kernel/locking/rwsem.c:1520 ocfs2_read_virt_blocks+0x23c/0x8c8 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+0x314/0x1d90 fs/ocfs2/dir.c:1091 ocfs2_rename+0x19c8/0x3160 fs/ocfs2/namei.c:1568 vfs_rename+0xb08/0xe3c fs/namei.c:4882 do_renameat2+0x760/0xaa4 fs/namei.c:5035 __do_sys_renameat2 fs/namei.c:5068 [inline] __se_sys_renameat2 fs/namei.c:5065 [inline] __arm64_sys_renameat2+0xe8/0x104 fs/namei.c:5065 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 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 netlink: 40 bytes leftover after parsing attributes in process `syz.0.44'. netlink: 2 bytes leftover after parsing attributes in process `syz.0.44'.