====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.3.1418/11617 is trying to acquire lock: ffff8880518f86f8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_calc_xattr_init+0x174/0xca0 fs/ocfs2/xattr.c:631 but task is already holding lock: ffff888077a69800 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] ffff888077a69800 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x49f0 fs/ocfs2/suballoc.c:789 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_remove_inode+0x15b/0x860 fs/ocfs2/inode.c:733 ocfs2_wipe_inode+0x6db/0x11f0 fs/ocfs2/inode.c:896 ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] ocfs2_evict_inode+0x7b9/0x13c0 fs/ocfs2/inode.c:1299 evict+0x3c2/0xad0 fs/inode.c:837 iput_final fs/inode.c:1957 [inline] iput.part.0+0x605/0xf50 fs/inode.c:2006 iput+0x35/0x40 fs/inode.c:1972 ocfs2_dentry_iput+0x139/0x330 fs/ocfs2/dcache.c:407 dentry_unlink_inode+0x282/0x490 fs/dcache.c:465 __dentry_kill+0x1d0/0x600 fs/dcache.c:670 finish_dput+0x76/0x480 fs/dcache.c:879 dput.part.0+0x456/0x570 fs/dcache.c:928 dput+0x1f/0x30 fs/dcache.c:920 __fput+0x519/0xb40 fs/file_table.c:477 task_work_run+0x150/0x240 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0x100/0x4a0 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline] do_syscall_64+0x67c/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_del_inode_from_orphan+0x112/0x700 fs/ocfs2/namei.c:2731 ocfs2_dio_end_io_write+0x2cd/0xee0 fs/ocfs2/aops.c:2306 ocfs2_dio_end_io+0x136/0x2c0 fs/ocfs2/aops.c:2404 dio_complete+0x224/0x950 fs/direct-io.c:281 __blockdev_direct_IO+0x309f/0x3ae0 fs/direct-io.c:1303 ocfs2_direct_IO+0x263/0x360 fs/ocfs2/aops.c:2441 generic_file_direct_write+0x198/0x410 mm/filemap.c:4248 __generic_file_write_iter+0x11b/0x240 mm/filemap.c:4417 ocfs2_file_write_iter+0xd79/0x2160 fs/ocfs2/file.c:2476 iter_file_splice_write+0x82b/0x10a0 fs/splice.c:738 do_splice_from fs/splice.c:938 [inline] direct_splice_actor+0x192/0x6c0 fs/splice.c:1161 splice_direct_to_actor+0x345/0xa30 fs/splice.c:1105 do_splice_direct_actor fs/splice.c:1204 [inline] do_splice_direct+0x174/0x240 fs/splice.c:1230 do_sendfile+0xadc/0xe20 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64 fs/read_write.c:1419 [inline] __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1419 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}: down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1590 ocfs2_try_remove_refcount_tree+0xa7/0x2f0 fs/ocfs2/refcounttree.c:933 ocfs2_xattr_set+0x1057/0x2b60 fs/ocfs2/xattr.c:3699 __vfs_removexattr+0x155/0x1c0 fs/xattr.c:518 __vfs_removexattr_locked+0x107/0x4d0 fs/xattr.c:553 vfs_removexattr+0xe9/0x2b0 fs/xattr.c:575 ovl_do_removexattr fs/overlayfs/overlayfs.h:335 [inline] ovl_removexattr fs/overlayfs/overlayfs.h:343 [inline] ovl_make_workdir fs/overlayfs/super.c:760 [inline] ovl_get_workdir fs/overlayfs/super.c:840 [inline] ovl_fill_super_creds fs/overlayfs/super.c:1453 [inline] ovl_fill_super+0x1412/0x5db0 fs/overlayfs/super.c:1567 vfs_get_super fs/super.c:1327 [inline] get_tree_nodev+0xdd/0x190 fs/super.c:1346 vfs_get_tree+0x92/0x320 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3760 [inline] do_new_mount fs/namespace.c:3836 [inline] path_mount+0x7d0/0x23d0 fs/namespace.c:4146 do_mount fs/namespace.c:4159 [inline] __do_sys_mount fs/namespace.c:4348 [inline] __se_sys_mount fs/namespace.c:4325 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:4325 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&oi->ip_xattr_sem){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x14b8/0x2630 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x17c/0x330 kernel/locking/lockdep.c:5825 down_read+0x99/0x460 kernel/locking/rwsem.c:1537 ocfs2_calc_xattr_init+0x174/0xca0 fs/ocfs2/xattr.c:631 ocfs2_mknod+0xe1a/0x2750 fs/ocfs2/namei.c:334 ocfs2_mkdir+0xf2/0x3f0 fs/ocfs2/namei.c:660 vfs_mkdir+0x361/0x850 fs/namei.c:5233 filename_mkdirat+0x48b/0x5e0 fs/namei.c:5266 __do_sys_mkdirat fs/namei.c:5287 [inline] __se_sys_mkdirat fs/namei.c:5284 [inline] __x64_sys_mkdirat+0x89/0xc0 fs/namei.c:5284 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 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: &oi->ip_xattr_sem --> &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] --> &ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE] Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]); lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]); lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]); rlock(&oi->ip_xattr_sem); *** DEADLOCK *** 3 locks held by syz.3.1418/11617: #0: ffff888057346420 (sb_writers#31){.+.+}-{0:0}, at: filename_create+0x10d/0x400 fs/namei.c:4915 #1: ffff8880518f89c0 (&type->i_mutex_dir_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1073 [inline] #1: ffff8880518f89c0 (&type->i_mutex_dir_key#20/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2923 [inline] #1: ffff8880518f89c0 (&type->i_mutex_dir_key#20/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2934 [inline] #1: ffff8880518f89c0 (&type->i_mutex_dir_key#20/1){+.+.}-{4:4}, at: filename_create+0x1c0/0x400 fs/namei.c:4922 #2: ffff888077a69800 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #2: ffff888077a69800 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x11c/0x49f0 fs/ocfs2/suballoc.c:789 stack backtrace: CPU: 1 UID: 0 PID: 11617 Comm: syz.3.1418 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x14b8/0x2630 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x17c/0x330 kernel/locking/lockdep.c:5825 down_read+0x99/0x460 kernel/locking/rwsem.c:1537 ocfs2_calc_xattr_init+0x174/0xca0 fs/ocfs2/xattr.c:631 ocfs2_mknod+0xe1a/0x2750 fs/ocfs2/namei.c:334 ocfs2_mkdir+0xf2/0x3f0 fs/ocfs2/namei.c:660 vfs_mkdir+0x361/0x850 fs/namei.c:5233 filename_mkdirat+0x48b/0x5e0 fs/namei.c:5266 __do_sys_mkdirat fs/namei.c:5287 [inline] __se_sys_mkdirat fs/namei.c:5284 [inline] __x64_sys_mkdirat+0x89/0xc0 fs/namei.c:5284 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f97cd59ae57 Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f97ce508e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f97ce508ee0 RCX: 00007f97cd59ae57 RDX: 00000000000001ff RSI: 0000200000000280 RDI: 00000000ffffff9c RBP: 0000200000000040 R08: 00002000000007c0 R09: 0000000000000000 R10: 0000200000000040 R11: 0000000000000246 R12: 0000200000000280 R13: 00007f97ce508ea0 R14: 0000000000000000 R15: 0000000000000000