overlayfs: upper fs does not support tmpfile. overlayfs: upper fs does not support RENAME_WHITEOUT. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.9.3272/21051 is trying to acquire lock: ffff8880421a41a0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] ffff8880421a41a0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_xattr_set+0xbeb/0x13a0 fs/ocfs2/xattr.c:3666 but task is already holding lock: ffff88804226bee8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x494/0x13a0 fs/ocfs2/xattr.c:3627 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+0x4a/0x330 kernel/locking/rwsem.c:1574 ocfs2_init_acl+0x2fd/0x7e0 fs/ocfs2/acl.c:367 ocfs2_mknod+0x166a/0x2240 fs/ocfs2/namei.c:414 ocfs2_create+0x195/0x460 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4508 [inline] open_last_lookups fs/namei.c:4608 [inline] path_openat+0x133a/0x3830 fs/namei.c:4860 do_file_open+0x23e/0x4a0 fs/namei.c:4892 do_sys_openat2+0x115/0x200 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_open fs/open.c:1382 [inline] __se_sys_open fs/open.c:1378 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1378 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x4a/0x330 kernel/locking/rwsem.c:1574 ocfs2_start_trans+0x3ab/0x700 fs/ocfs2/journal.c:369 ocfs2_mknod+0x116a/0x2240 fs/ocfs2/namei.c:365 ocfs2_mkdir+0x181/0x460 fs/ocfs2/namei.c:660 vfs_mkdir+0x406/0x620 fs/namei.c:5276 filename_mkdirat+0x285/0x510 fs/namei.c:5309 __do_sys_mkdirat fs/namei.c:5330 [inline] __se_sys_mkdirat+0x35/0x150 fs/namei.c:5327 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (sb_internal#7){.+.+}-{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_remove_btree_range+0x819/0x15f0 fs/ocfs2/alloc.c:5769 ocfs2_commit_truncate+0xc60/0x2560 fs/ocfs2/alloc.c:7383 ocfs2_truncate_for_delete fs/ocfs2/inode.c:735 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:902 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] ocfs2_evict_inode+0xf8f/0x4390 fs/ocfs2/inode.c:1333 evict+0x624/0xb50 fs/inode.c:825 filename_unlinkat+0x43f/0x610 fs/namei.c:5589 __do_sys_unlink fs/namei.c:5620 [inline] __se_sys_unlink+0x2e/0x140 fs/namei.c:5617 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_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+0x1520/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 down_write+0x96/0x200 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] ocfs2_xattr_set+0xbeb/0x13a0 fs/ocfs2/xattr.c:3666 __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:323 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:335 [inline] ovl_make_workdir fs/overlayfs/super.c:724 [inline] ovl_get_workdir fs/overlayfs/super.c:836 [inline] ovl_fill_super_creds fs/overlayfs/super.c:1449 [inline] ovl_fill_super+0x3fa0/0x5d40 fs/overlayfs/super.c:1560 vfs_get_super fs/super.c:1267 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1286 vfs_get_tree+0x92/0x2a0 fs/super.c:1694 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3765 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3841 do_mount fs/namespace.c:4174 [inline] __do_sys_mount fs/namespace.c:4390 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4367 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 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[TRUNCATE_LOG_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[TRUNCATE_LOG_SYSTEM_INODE]); *** DEADLOCK *** 4 locks held by syz.9.3272/21051: #0: ffff8880691e00d8 (&type->s_umount_key#60/1){+.+.}-{4:4}, at: alloc_super fs/super.c:345 [inline] #0: ffff8880691e00d8 (&type->s_umount_key#60/1){+.+.}-{4:4}, at: sget_fc+0x938/0x1900 fs/super.c:766 #1: ffff88802ac60450 (sb_writers#29){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494 #2: ffff88804226c1a0 (&sb->s_type->i_mutex_key#43){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #2: ffff88804226c1a0 (&sb->s_type->i_mutex_key#43){++++}-{4:4}, at: vfs_setxattr+0x13e/0x360 fs/xattr.c:343 #3: ffff88804226bee8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x494/0x13a0 fs/ocfs2/xattr.c:3627 stack backtrace: CPU: 1 UID: 0 PID: 21051 Comm: syz.9.3272 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026 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+0x1520/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 down_write+0x96/0x200 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] ocfs2_xattr_set+0xbeb/0x13a0 fs/ocfs2/xattr.c:3666 __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:323 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:335 [inline] ovl_make_workdir fs/overlayfs/super.c:724 [inline] ovl_get_workdir fs/overlayfs/super.c:836 [inline] ovl_fill_super_creds fs/overlayfs/super.c:1449 [inline] ovl_fill_super+0x3fa0/0x5d40 fs/overlayfs/super.c:1560 vfs_get_super fs/super.c:1267 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1286 vfs_get_tree+0x92/0x2a0 fs/super.c:1694 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3765 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3841 do_mount fs/namespace.c:4174 [inline] __do_sys_mount fs/namespace.c:4390 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4367 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9cbd79de59 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:00007f9cbe6ca028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f9cbda25fa0 RCX: 00007f9cbd79de59 RDX: 0000200000000b80 RSI: 00002000000000c0 RDI: 0000000000000000 RBP: 00007f9cbd833e6f R08: 0000200000000140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9cbda26038 R14: 00007f9cbda25fa0 R15: 00007fffab2e8608 overlayfs: upper fs missing required features.