====================================================== WARNING: possible circular locking dependency detected 6.15.0-rc5-syzkaller-00300-g3ce9925823c7 #0 Not tainted ------------------------------------------------------ syz.2.36/6161 is trying to acquire lock: ffff888026478610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_setattr+0x969/0x1b40 fs/ocfs2/file.c:1263 but task is already holding lock: ffff88805c3922e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_setattr+0x95a/0x1b40 fs/ocfs2/file.c:1262 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577 ocfs2_try_remove_refcount_tree+0xb6/0x320 fs/ocfs2/refcounttree.c:932 ocfs2_xattr_set+0x595/0x11f0 fs/ocfs2/xattr.c:3669 ocfs2_set_acl+0x701/0x7b0 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x1aa/0x2a0 fs/ocfs2/acl.c:286 set_posix_acl fs/posix_acl.c:954 [inline] vfs_remove_acl+0x489/0x700 fs/posix_acl.c:1241 ovl_do_remove_acl fs/overlayfs/overlayfs.h:353 [inline] ovl_workdir_create+0x508/0x810 fs/overlayfs/super.c:353 ovl_make_workdir fs/overlayfs/super.c:669 [inline] ovl_get_workdir+0x324/0x1700 fs/overlayfs/super.c:827 ovl_fill_super+0x1386/0x35d0 fs/overlayfs/super.c:1406 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xb8/0x150 fs/super.c:1299 vfs_get_tree+0x8f/0x2b0 fs/super.c:1759 do_new_mount+0x24a/0xa40 fs/namespace.c:3881 do_mount fs/namespace.c:4221 [inline] __do_sys_mount fs/namespace.c:4432 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4409 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (&oi->ip_xattr_sem){++++}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 ocfs2_init_acl+0x2f9/0x720 fs/ocfs2/acl.c:366 ocfs2_mknod+0x1321/0x2050 fs/ocfs2/namei.c:410 ocfs2_mkdir+0x191/0x440 fs/ocfs2/namei.c:656 vfs_mkdir+0x303/0x510 fs/namei.c:4359 do_mkdirat+0x247/0x590 fs/namei.c:4392 __do_sys_mkdir fs/namei.c:4414 [inline] __se_sys_mkdir fs/namei.c:4412 [inline] __x64_sys_mkdir+0x6c/0x80 fs/namei.c:4412 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (jbd2_handle){++++}-{0:0}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 start_this_handle+0x1fa7/0x21c0 fs/jbd2/transaction.c:444 jbd2__journal_start+0x2c1/0x5b0 fs/jbd2/transaction.c:501 jbd2_journal_start+0x2a/0x40 fs/jbd2/transaction.c:540 ocfs2_start_trans+0x376/0x6d0 fs/ocfs2/journal.c:374 ocfs2_shutdown_local_alloc+0x200/0xa10 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x201/0x8d0 fs/ocfs2/super.c:1825 generic_shutdown_super+0x132/0x2c0 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xb9/0x130 fs/super.c:473 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1431 task_work_run+0x1d1/0x260 kernel/task_work.c:227 resume_user_mode_work+0x5e/0x80 include/linux/resume_user_mode.h:50 exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x9a/0x120 kernel/entry/common.c:218 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&journal->j_trans_barrier){.+.+}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x36a/0x6d0 fs/ocfs2/journal.c:372 ocfs2_shutdown_local_alloc+0x200/0xa10 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x201/0x8d0 fs/ocfs2/super.c:1825 generic_shutdown_super+0x132/0x2c0 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xb9/0x130 fs/super.c:473 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1431 task_work_run+0x1d1/0x260 kernel/task_work.c:227 resume_user_mode_work+0x5e/0x80 include/linux/resume_user_mode.h:50 exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x9a/0x120 kernel/entry/common.c:218 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (sb_internal#2){.+.+}-{0:0}: check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3909 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 percpu_down_read include/linux/percpu-rwsem.h:52 [inline] __sb_start_write include/linux/fs.h:1783 [inline] sb_start_intwrite include/linux/fs.h:1966 [inline] ocfs2_start_trans+0x26b/0x6d0 fs/ocfs2/journal.c:370 ocfs2_setattr+0x969/0x1b40 fs/ocfs2/file.c:1263 notify_change+0xb33/0xe40 fs/attr.c:552 ovl_do_notify_change fs/overlayfs/overlayfs.h:203 [inline] ovl_workdir_create+0x68b/0x810 fs/overlayfs/super.c:363 ovl_make_workdir fs/overlayfs/super.c:669 [inline] ovl_get_workdir+0x324/0x1700 fs/overlayfs/super.c:827 ovl_fill_super+0x1386/0x35d0 fs/overlayfs/super.c:1406 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xb8/0x150 fs/super.c:1299 vfs_get_tree+0x8f/0x2b0 fs/super.c:1759 do_new_mount+0x24a/0xa40 fs/namespace.c:3881 do_mount fs/namespace.c:4221 [inline] __do_sys_mount fs/namespace.c:4432 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4409 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f 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.2.36/6161: #0: ffff888028a1c0e0 (&type->s_umount_key#60/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970 fs/super.c:344 #1: ffff888026478420 (sb_writers#26){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:556 #2: ffff88805c395f40 (&sb->s_type->i_mutex_key#31/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline] #2: ffff88805c395f40 (&sb->s_type->i_mutex_key#31/1){+.+.}-{4:4}, at: ovl_workdir_create+0x143/0x810 fs/overlayfs/super.c:302 #3: ffff88805c392640 (&sb->s_type->i_mutex_key#33){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline] #3: ffff88805c392640 (&sb->s_type->i_mutex_key#33){+.+.}-{4:4}, at: ovl_workdir_create+0x610/0x810 fs/overlayfs/super.c:362 #4: ffff88805c3922e0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_setattr+0x95a/0x1b40 fs/ocfs2/file.c:1262 stack backtrace: CPU: 1 UID: 0 PID: 6161 Comm: syz.2.36 Not tainted 6.15.0-rc5-syzkaller-00300-g3ce9925823c7 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2079 check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2211 check_prev_add kernel/locking/lockdep.c:3166 [inline] check_prevs_add kernel/locking/lockdep.c:3285 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3909 __lock_acquire+0xaac/0xd20 kernel/locking/lockdep.c:5235 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5866 percpu_down_read include/linux/percpu-rwsem.h:52 [inline] __sb_start_write include/linux/fs.h:1783 [inline] sb_start_intwrite include/linux/fs.h:1966 [inline] ocfs2_start_trans+0x26b/0x6d0 fs/ocfs2/journal.c:370 ocfs2_setattr+0x969/0x1b40 fs/ocfs2/file.c:1263 notify_change+0xb33/0xe40 fs/attr.c:552 ovl_do_notify_change fs/overlayfs/overlayfs.h:203 [inline] ovl_workdir_create+0x68b/0x810 fs/overlayfs/super.c:363 ovl_make_workdir fs/overlayfs/super.c:669 [inline] ovl_get_workdir+0x324/0x1700 fs/overlayfs/super.c:827 ovl_fill_super+0x1386/0x35d0 fs/overlayfs/super.c:1406 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xb8/0x150 fs/super.c:1299 vfs_get_tree+0x8f/0x2b0 fs/super.c:1759 do_new_mount+0x24a/0xa40 fs/namespace.c:3881 do_mount fs/namespace.c:4221 [inline] __do_sys_mount fs/namespace.c:4432 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4409 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6edff8e969 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:00007f6ee0ed2038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f6ee01b5fa0 RCX: 00007f6edff8e969 RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000 RBP: 00007f6ee0010ab1 R08: 00002000000001c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6ee01b5fa0 R15: 00007ffe9df449d8 overlayfs: upper fs does not support tmpfile. overlayfs: upper fs does not support RENAME_WHITEOUT. overlayfs: upper fs missing required features.