overlayfs: upper fs does not support tmpfile. overlayfs: upper fs does not support RENAME_WHITEOUT. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.8.593/14181 is trying to acquire lock: ffff888033944e80 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] ffff888033944e80 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x11f/0x2680 fs/ocfs2/localalloc.c:636 but task is already holding lock: ffff88806311ecd8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x494/0x13a0 fs/ocfs2/xattr.c:3829 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+0x97/0x200 kernel/locking/rwsem.c:1574 ocfs2_xattr_get+0xf4/0x260 fs/ocfs2/xattr.c:1575 __vfs_getxattr+0x412/0x440 fs/xattr.c:446 smk_fetch+0xb4/0x140 security/smack/smack_lsm.c:298 smack_d_instantiate+0x757/0x990 security/smack/smack_lsm.c:3679 security_d_instantiate+0x106/0x1d0 security/security.c:3703 d_instantiate+0x54/0xb0 fs/dcache.c:2176 ocfs2_mknod+0x199c/0x21a0 fs/ocfs2/namei.c:454 ocfs2_create+0x195/0x460 fs/ocfs2/namei.c:678 lookup_open+0xc17/0x1a60 fs/namei.c:4567 open_last_lookups fs/namei.c:4767 [inline] path_openat+0x67c/0x1d60 fs/namei.c:4997 do_file_open+0x23e/0x4a0 fs/namei.c:5029 do_sys_openat2+0x115/0x200 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_open fs/open.c:1431 [inline] __se_sys_open fs/open.c:1427 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1427 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x97/0x200 kernel/locking/rwsem.c:1574 ocfs2_start_trans+0x3af/0x700 fs/ocfs2/journal.c:369 ocfs2_mknod+0xeed/0x21a0 fs/ocfs2/namei.c:365 vfs_mknod+0x443/0x610 fs/namei.c:5269 filename_mknodat+0x3cf/0x670 fs/namei.c:-1 __do_sys_mknod fs/namei.c:5356 [inline] __se_sys_mknod+0x3a/0x150 fs/namei.c:5353 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (sb_internal#3){.+.+}-{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:367 ocfs2_mknod+0xeed/0x21a0 fs/ocfs2/namei.c:365 vfs_mknod+0x443/0x610 fs/namei.c:5269 filename_mknodat+0x3cf/0x670 fs/namei.c:-1 __do_sys_mknod fs/namei.c:5356 [inline] __se_sys_mknod+0x3a/0x150 fs/namei.c:5353 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3209 [inline] check_prevs_add kernel/locking/lockdep.c:3328 [inline] validate_chain kernel/locking/lockdep.c:3952 [inline] __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942 down_write+0x3a/0x50 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] ocfs2_reserve_local_alloc_bits+0x11f/0x2680 fs/ocfs2/localalloc.c:636 ocfs2_reserve_clusters_with_limit+0x1b9/0xc20 fs/ocfs2/suballoc.c:1284 ocfs2_init_xattr_set_ctxt+0x371/0x760 fs/ocfs2/xattr.c:3534 ocfs2_xattr_set+0xc78/0x13a0 fs/ocfs2/xattr.c:3880 __vfs_setxattr+0x442/0x480 fs/xattr.c:223 __vfs_setxattr_noperm+0x12a/0x660 fs/xattr.c:257 vfs_setxattr+0x163/0x360 fs/xattr.c:344 ovl_do_setxattr fs/overlayfs/overlayfs.h:324 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:336 [inline] ovl_make_workdir fs/overlayfs/super.c:724 [inline] ovl_get_workdir+0xd18/0x1980 fs/overlayfs/super.c:836 ovl_fill_super_creds fs/overlayfs/super.c:1449 [inline] ovl_fill_super+0x1702/0x4360 fs/overlayfs/super.c:1561 vfs_get_super fs/super.c:1391 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1410 vfs_get_tree+0x92/0x2a0 fs/super.c:1933 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[LOCAL_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[LOCAL_ALLOC_SYSTEM_INODE]); *** DEADLOCK *** locks held by syz.8.593/14181: 4, last CPU#0: #0: ffff888064b860e0 (&type->s_umount_key#74/1){+.+.}-{4:4}, at: alloc_super fs/super.c:351 [inline] #0: ffff888064b860e0 (&type->s_umount_key#74/1){+.+.}-{4:4}, at: sget_fc+0x97c/0x1a60 fs/super.c:875 #1: ffff888036c08510 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494 #2: ffff88806311f000 (&sb->s_type->i_mutex_key#32){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #2: ffff88806311f000 (&sb->s_type->i_mutex_key#32){++++}-{4:4}, at: vfs_setxattr+0x13e/0x360 fs/xattr.c:343 #3: ffff88806311ecd8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x494/0x13a0 fs/ocfs2/xattr.c:3829 stack backtrace: CPU: 0 UID: 0 PID: 14181 Comm: syz.8.593 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2087 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2219 check_prev_add kernel/locking/lockdep.c:3209 [inline] check_prevs_add kernel/locking/lockdep.c:3328 [inline] validate_chain kernel/locking/lockdep.c:3952 [inline] __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942 down_write+0x3a/0x50 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] ocfs2_reserve_local_alloc_bits+0x11f/0x2680 fs/ocfs2/localalloc.c:636 ocfs2_reserve_clusters_with_limit+0x1b9/0xc20 fs/ocfs2/suballoc.c:1284 ocfs2_init_xattr_set_ctxt+0x371/0x760 fs/ocfs2/xattr.c:3534 ocfs2_xattr_set+0xc78/0x13a0 fs/ocfs2/xattr.c:3880 __vfs_setxattr+0x442/0x480 fs/xattr.c:223 __vfs_setxattr_noperm+0x12a/0x660 fs/xattr.c:257 vfs_setxattr+0x163/0x360 fs/xattr.c:344 ovl_do_setxattr fs/overlayfs/overlayfs.h:324 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:336 [inline] ovl_make_workdir fs/overlayfs/super.c:724 [inline] ovl_get_workdir+0xd18/0x1980 fs/overlayfs/super.c:836 ovl_fill_super_creds fs/overlayfs/super.c:1449 [inline] ovl_fill_super+0x1702/0x4360 fs/overlayfs/super.c:1561 vfs_get_super fs/super.c:1391 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1410 vfs_get_tree+0x92/0x2a0 fs/super.c:1933 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4397 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4374 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1e6294e159 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:00007f1e6031e028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f1e62bd6360 RCX: 00007f1e6294e159 RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000 RBP: 00007f1e629e506b R08: 0000200000000280 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1e62bd63f8 R14: 00007f1e62bd6360 R15: 00007fffe937e898 overlayfs: upper fs missing required features.