====================================================== WARNING: possible circular locking dependency detected 6.6.95-syzkaller #0 Not tainted ------------------------------------------------------ syz.9.727/9099 is trying to acquire lock: ffff8880785d6608 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_setattr+0x95a/0x1b20 fs/ocfs2/file.c:1262 but task is already holding lock: ffff88805dfa3f60 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_setattr+0x94b/0x1b20 fs/ocfs2/file.c:1261 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}: down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 ocfs2_try_remove_refcount_tree+0xb7/0x320 fs/ocfs2/refcounttree.c:932 ocfs2_xattr_set+0x596/0x11f0 fs/ocfs2/xattr.c:3669 ocfs2_set_acl+0x4e1/0x590 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x1ab/0x2a0 fs/ocfs2/acl.c:286 set_posix_acl fs/posix_acl.c:956 [inline] vfs_remove_acl+0x4e3/0x740 fs/posix_acl.c:1243 ovl_do_remove_acl fs/overlayfs/overlayfs.h:337 [inline] ovl_workdir_create+0x409/0x760 fs/overlayfs/super.c:340 ovl_make_workdir fs/overlayfs/super.c:716 [inline] ovl_get_workdir+0x300/0x1740 fs/overlayfs/super.c:874 ovl_fill_super+0x1345/0x3560 fs/overlayfs/super.c:1427 vfs_get_super fs/super.c:1346 [inline] get_tree_nodev+0xb5/0x140 fs/super.c:1365 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24b/0xa40 fs/namespace.c:3366 do_mount fs/namespace.c:3706 [inline] __do_sys_mount fs/namespace.c:3915 [inline] __se_sys_mount+0x2da/0x3c0 fs/namespace.c:3892 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #3 (&oi->ip_xattr_sem){++++}-{3:3}: down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x2fa/0x720 fs/ocfs2/acl.c:366 ocfs2_mknod+0x12e5/0x20f0 fs/ocfs2/namei.c:410 ocfs2_create+0x196/0x410 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3488 [inline] open_last_lookups fs/namei.c:3556 [inline] path_openat+0x1277/0x3190 fs/namei.c:3786 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816 do_sys_openat2+0x12c/0x1c0 fs/open.c:1419 do_sys_open fs/open.c:1434 [inline] __do_sys_open fs/open.c:1442 [inline] __se_sys_open fs/open.c:1438 [inline] __x64_sys_open+0x11f/0x140 fs/open.c:1438 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (jbd2_handle){++++}-{0:0}: start_this_handle+0x1e9d/0x20c0 fs/jbd2/transaction.c:448 jbd2__journal_start+0x2bb/0x5b0 fs/jbd2/transaction.c:505 jbd2_journal_start+0x2a/0x40 fs/jbd2/transaction.c:544 ocfs2_start_trans+0x376/0x6c0 fs/ocfs2/journal.c:374 ocfs2_shutdown_local_alloc+0x201/0xa10 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1e2/0x890 fs/ocfs2/super.c:1883 generic_shutdown_super+0x134/0x2b0 fs/super.c:693 kill_block_super+0x44/0x90 fs/super.c:1660 deactivate_locked_super+0x97/0x100 fs/super.c:481 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1250 task_work_run+0x1ce/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x36a/0x6c0 fs/ocfs2/journal.c:372 ocfs2_shutdown_local_alloc+0x201/0xa10 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1e2/0x890 fs/ocfs2/super.c:1883 generic_shutdown_super+0x134/0x2b0 fs/super.c:693 kill_block_super+0x44/0x90 fs/super.c:1660 deactivate_locked_super+0x97/0x100 fs/super.c:481 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1250 task_work_run+0x1ce/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (sb_internal#2){.+.+}-{0:0}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1633 [inline] sb_start_intwrite include/linux/fs.h:1755 [inline] ocfs2_start_trans+0x26b/0x6c0 fs/ocfs2/journal.c:370 ocfs2_setattr+0x95a/0x1b20 fs/ocfs2/file.c:1262 notify_change+0xb0d/0xe10 fs/attr.c:499 ovl_do_notify_change fs/overlayfs/overlayfs.h:188 [inline] ovl_workdir_create+0x5de/0x760 fs/overlayfs/super.c:350 ovl_make_workdir fs/overlayfs/super.c:716 [inline] ovl_get_workdir+0x300/0x1740 fs/overlayfs/super.c:874 ovl_fill_super+0x1345/0x3560 fs/overlayfs/super.c:1427 vfs_get_super fs/super.c:1346 [inline] get_tree_nodev+0xb5/0x140 fs/super.c:1365 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24b/0xa40 fs/namespace.c:3366 do_mount fs/namespace.c:3706 [inline] __do_sys_mount fs/namespace.c:3915 [inline] __se_sys_mount+0x2da/0x3c0 fs/namespace.c:3892 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: sb_internal#2 --> &oi->ip_xattr_sem --> &ocfs2_file_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_file_ip_alloc_sem_key); lock(&oi->ip_xattr_sem); lock(&ocfs2_file_ip_alloc_sem_key); rlock(sb_internal#2); *** DEADLOCK *** 5 locks held by syz.9.727/9099: #0: ffff88805bb400e0 (&type->s_umount_key#59/1){+.+.}-{3:3}, at: alloc_super+0x1fa/0x920 fs/super.c:352 #1: ffff8880785d6418 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:403 #2: ffff88805dfa5118 (&sb->s_type->i_mutex_key#26/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline] #2: ffff88805dfa5118 (&sb->s_type->i_mutex_key#26/1){+.+.}-{3:3}, at: ovl_workdir_create+0x150/0x760 fs/overlayfs/super.c:290 #3: ffff88805dfa42d8 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #3: ffff88805dfa42d8 (&sb->s_type->i_mutex_key#26){+.+.}-{3:3}, at: ovl_workdir_create+0x557/0x760 fs/overlayfs/super.c:349 #4: ffff88805dfa3f60 (&ocfs2_file_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_setattr+0x94b/0x1b20 fs/ocfs2/file.c:1261 stack backtrace: CPU: 0 PID: 9099 Comm: syz.9.727 Not tainted 6.6.95-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 check_noncircular+0x2bd/0x3c0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1633 [inline] sb_start_intwrite include/linux/fs.h:1755 [inline] ocfs2_start_trans+0x26b/0x6c0 fs/ocfs2/journal.c:370 ocfs2_setattr+0x95a/0x1b20 fs/ocfs2/file.c:1262 notify_change+0xb0d/0xe10 fs/attr.c:499 ovl_do_notify_change fs/overlayfs/overlayfs.h:188 [inline] ovl_workdir_create+0x5de/0x760 fs/overlayfs/super.c:350 ovl_make_workdir fs/overlayfs/super.c:716 [inline] ovl_get_workdir+0x300/0x1740 fs/overlayfs/super.c:874 ovl_fill_super+0x1345/0x3560 fs/overlayfs/super.c:1427 vfs_get_super fs/super.c:1346 [inline] get_tree_nodev+0xb5/0x140 fs/super.c:1365 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24b/0xa40 fs/namespace.c:3366 do_mount fs/namespace.c:3706 [inline] __do_sys_mount fs/namespace.c:3915 [inline] __se_sys_mount+0x2da/0x3c0 fs/namespace.c:3892 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f984098e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f98418a0038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f9840bb5fa0 RCX: 00007f984098e929 RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000 RBP: 00007f9840a10b39 R08: 0000200000000a00 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f9840bb5fa0 R15: 00007fff0ad80188 overlayfs: upper fs does not support tmpfile. (syz.9.727,9099,1):ocfs2_check_dir_entry:325 ERROR: bad entry in directory #72: rec_len is smaller than minimal - offset=0, inode=348545186005064, rec_len=0, name_len=1 (syz.9.727,9099,1):ocfs2_prepare_dir_for_insert:4312 ERROR: status = -2 (syz.9.727,9099,1):__ocfs2_prepare_orphan_dir:2171 ERROR: status = -2 (syz.9.727,9099,1):ocfs2_prepare_orphan_dir:2213 ERROR: status = -2 (syz.9.727,9099,0):ocfs2_prepare_orphan_dir:2229 ERROR: status = -2 (syz.9.727,9099,0):ocfs2_unlink:965 ERROR: status = -2 overlayfs: cleanup of 'work/#b7' failed (-2) overlayfs: upper fs does not support RENAME_WHITEOUT. overlayfs: upper fs missing required features. ocfs2: Unmounting device (7,9) on (node local)