overlayfs: failed to create directory ./bus/work (errno: 13); mounting read-only overlayfs: fs on './file1/file0' does not support file handles, falling back to index=off,nfs_export=off. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.3.2964/14500 is trying to acquire lock: ffff0000e213c2c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] ffff0000e213c2c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{3:3}, at: ocfs2_xattr_set+0x900/0xf20 fs/ocfs2/xattr.c:3626 but task is already holding lock: ffff0000e213b1b8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x34c/0xf20 fs/ocfs2/xattr.c:3587 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&oi->ip_xattr_sem){++++}-{3:3}: down_read+0x64/0x300 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x264/0x61c fs/ocfs2/acl.c:365 ocfs2_mknod+0x129c/0x2110 fs/ocfs2/namei.c:410 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 -> #1 (jbd2_handle){++++}-{0:0}: jbd2_journal_lock_updates+0xa8/0x314 fs/jbd2/transaction.c:880 __ocfs2_flush_truncate_log+0x26c/0x10a8 fs/ocfs2/alloc.c:6029 ocfs2_flush_truncate_log+0x48/0x68 fs/ocfs2/alloc.c:6076 ocfs2_sync_fs+0x100/0x2c0 fs/ocfs2/super.c:402 sync_filesystem+0x1a0/0x218 fs/sync.c:66 generic_shutdown_super+0x70/0x324 fs/super.c:474 kill_block_super+0x70/0xdc fs/super.c:1470 deactivate_locked_super+0xac/0x120 fs/super.c:332 deactivate_super+0xe4/0x104 fs/super.c:363 cleanup_mnt+0x390/0x418 fs/namespace.c:1191 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198 task_work_run+0x1ec/0x278 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x1fa0/0x2aa4 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 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8){+.+.}-{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 down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] ocfs2_xattr_set+0x900/0xf20 fs/ocfs2/xattr.c:3626 ocfs2_xattr_trusted_set+0x4c/0x64 fs/ocfs2/xattr.c:7349 __vfs_setxattr+0x384/0x3a0 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277 vfs_setxattr+0x158/0x2ac fs/xattr.c:309 ovl_do_setxattr fs/overlayfs/overlayfs.h:252 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:264 [inline] ovl_check_setxattr+0x120/0x274 fs/overlayfs/util.c:666 ovl_set_origin+0x294/0x3a4 fs/overlayfs/copy_up.c:411 ovl_fix_origin fs/overlayfs/namei.c:821 [inline] ovl_lookup+0x7c8/0x13c8 fs/overlayfs/namei.c:942 __lookup_slow+0x25c/0x38c fs/namei.c:1698 lookup_slow+0x5c/0x80 fs/namei.c:1715 walk_component fs/namei.c:2006 [inline] link_path_walk+0x794/0xcc0 fs/namei.c:2333 path_parentat fs/namei.c:2534 [inline] __filename_parentat+0x1d8/0x568 fs/namei.c:2558 filename_parentat fs/namei.c:2576 [inline] do_unlinkat+0xe8/0x500 fs/namei.c:4369 __do_sys_unlinkat fs/namei.c:4441 [inline] __se_sys_unlinkat fs/namei.c:4434 [inline] __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4434 __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: &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8 --> jbd2_handle --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(jbd2_handle); lock(&oi->ip_xattr_sem); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#8); *** DEADLOCK *** 4 locks held by syz.3.2964/14500: #0: ffff0000e23b8748 (&ovl_i_mutex_dir_key[depth]){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff0000e23b8748 (&ovl_i_mutex_dir_key[depth]){++++}-{3:3}, at: lookup_slow+0x4c/0x80 fs/namei.c:1714 #1: ffff0000d33c8460 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402 #2: ffff0000e213b488 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #2: ffff0000e213b488 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: vfs_setxattr+0x138/0x2ac fs/xattr.c:308 #3: ffff0000e213b1b8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x34c/0xf20 fs/ocfs2/xattr.c:3587 stack backtrace: CPU: 0 PID: 14500 Comm: syz.3.2964 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 down_write+0x5c/0x88 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] ocfs2_xattr_set+0x900/0xf20 fs/ocfs2/xattr.c:3626 ocfs2_xattr_trusted_set+0x4c/0x64 fs/ocfs2/xattr.c:7349 __vfs_setxattr+0x384/0x3a0 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277 vfs_setxattr+0x158/0x2ac fs/xattr.c:309 ovl_do_setxattr fs/overlayfs/overlayfs.h:252 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:264 [inline] ovl_check_setxattr+0x120/0x274 fs/overlayfs/util.c:666 ovl_set_origin+0x294/0x3a4 fs/overlayfs/copy_up.c:411 ovl_fix_origin fs/overlayfs/namei.c:821 [inline] ovl_lookup+0x7c8/0x13c8 fs/overlayfs/namei.c:942 __lookup_slow+0x25c/0x38c fs/namei.c:1698 lookup_slow+0x5c/0x80 fs/namei.c:1715 walk_component fs/namei.c:2006 [inline] link_path_walk+0x794/0xcc0 fs/namei.c:2333 path_parentat fs/namei.c:2534 [inline] __filename_parentat+0x1d8/0x568 fs/namei.c:2558 filename_parentat fs/namei.c:2576 [inline] do_unlinkat+0xe8/0x500 fs/namei.c:4369 __do_sys_unlinkat fs/namei.c:4441 [inline] __se_sys_unlinkat fs/namei.c:4434 [inline] __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4434 __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