overlayfs: upper fs does not support RENAME_WHITEOUT. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.6.3213/18378 is trying to acquire lock: ffff8880585ab480 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE] ){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] ){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16a/0x4940 fs/ocfs2/suballoc.c:857 but task is already holding lock: ffff88804cdace38 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x475/0x13e0 fs/ocfs2/xattr.c:3614 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 ( &oi->ip_xattr_sem){++++}-{4:4}: down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 ocfs2_init_acl+0x2fd/0x7e0 fs/ocfs2/acl.c:367 ocfs2_mknod+0x1679/0x2290 fs/ocfs2/namei.c:414 vfs_mknod+0x447/0x610 fs/namei.c:5092 filename_mknodat+0x3cb/0x660 fs/namei.c:-1 __do_sys_mknod fs/namei.c:5179 [inline] __se_sys_mknod+0x3a/0x150 fs/namei.c:5176 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x3ab/0x700 fs/ocfs2/journal.c:372 ocfs2_mknod+0x1181/0x2290 fs/ocfs2/namei.c:365 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4483 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x1395/0x3860 fs/namei.c:4827 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1383 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (sb_internal#6){.+.+}-{0:0}: percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs/super.h:19 [inline] sb_start_intwrite include/linux/fs/super.h:177 [inline] ocfs2_start_trans+0x2ac/0x700 fs/ocfs2/journal.c:370 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2331 [inline] ocfs2_dio_end_io+0x8b5/0x1210 fs/ocfs2/aops.c:2404 dio_complete+0x25b/0x790 fs/direct-io.c:281 __blockdev_direct_IO+0x2cb0/0x32f0 fs/direct-io.c:1303 ocfs2_direct_IO+0x251/0x2c0 fs/ocfs2/aops.c:2441 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4253 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4422 ocfs2_file_write_iter+0x1663/0x1ed0 fs/ocfs2/file.c:2476 do_iter_readv_writev+0x619/0x8c0 fs/read_write.c:-1 vfs_writev+0x33c/0x990 fs/read_write.c:1059 do_writev+0x154/0x2e0 fs/read_write.c:1105 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{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+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868 down_write+0x96/0x200 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_reserve_suballoc_bits+0x16a/0x4940 fs/ocfs2/suballoc.c:857 ocfs2_reserve_new_metadata_blocks+0x415/0x9a0 fs/ocfs2/suballoc.c:1053 ocfs2_init_xattr_set_ctxt+0x2f5/0x790 fs/ocfs2/xattr.c:3308 ocfs2_xattr_set+0xc42/0x13e0 fs/ocfs2/xattr.c:3665 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x163/0x360 fs/xattr.c:321 ovl_do_setxattr fs/overlayfs/overlayfs.h:317 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:329 [inline] ovl_make_workdir fs/overlayfs/super.c:728 [inline] ovl_get_workdir fs/overlayfs/super.c:840 [inline] ovl_fill_super_creds fs/overlayfs/super.c:1453 [inline] ovl_fill_super+0x4b6b/0x5e50 fs/overlayfs/super.c:1564 vfs_get_super fs/super.c:1327 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1346 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3767 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3843 do_mount fs/namespace.c:4166 [inline] __do_sys_mount fs/namespace.c:4355 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4332 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/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: &ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE] --> &journal->j_trans_barrier --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(&journal->j_trans_barrier); lock(&oi->ip_xattr_sem); lock(&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]); *** DEADLOCK *** 4 locks held by syz.6.3213/18378: #0: ffff88805f0160e0 (&type->s_umount_key#51/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xab0 fs/super.c:345 #1: ffff888036f2e420 (sb_writers#31){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #2: ffff88804cdad100 (&sb->s_type->i_mutex_key#41){++++}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #2: ffff88804cdad100 (&sb->s_type->i_mutex_key#41){++++}-{4:4}, at: vfs_setxattr+0x13e/0x360 fs/xattr.c:320 #3: ffff88804cdace38 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x475/0x13e0 fs/ocfs2/xattr.c:3614 stack backtrace: CPU: 1 UID: 0 PID: 18378 Comm: syz.6.3213 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 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+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868 down_write+0x96/0x200 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_reserve_suballoc_bits+0x16a/0x4940 fs/ocfs2/suballoc.c:857 ocfs2_reserve_new_metadata_blocks+0x415/0x9a0 fs/ocfs2/suballoc.c:1053 ocfs2_init_xattr_set_ctxt+0x2f5/0x790 fs/ocfs2/xattr.c:3308 ocfs2_xattr_set+0xc42/0x13e0 fs/ocfs2/xattr.c:3665 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x163/0x360 fs/xattr.c:321 ovl_do_setxattr fs/overlayfs/overlayfs.h:317 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:329 [inline] ovl_make_workdir fs/overlayfs/super.c:728 [inline] ovl_get_workdir fs/overlayfs/super.c:840 [inline] ovl_fill_super_creds fs/overlayfs/super.c:1453 [inline] ovl_fill_super+0x4b6b/0x5e50 fs/overlayfs/super.c:1564 vfs_get_super fs/super.c:1327 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1346 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3767 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3843 do_mount fs/namespace.c:4166 [inline] __do_sys_mount fs/namespace.c:4355 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4332 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ffb5079bf79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffb51599028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffb50a15fa0 RCX: 00007ffb5079bf79 RDX: 0000200000000440 RSI: 0000200000000100 RDI: 0000000000000000 RBP: 00007ffb508327e0 R08: 0000200000000200 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffb50a16038 R14: 00007ffb50a15fa0 R15: 00007ffe21fedef8 overlayfs: upper fs missing required features.