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.1.1232/10768 is trying to acquire lock: ffff8880545a33a0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] ffff8880545a33a0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_xattr_set+0xd4d/0x2bb0 fs/ocfs2/xattr.c:3666 but task is already holding lock: ffff88805458dae8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x429/0x2bb0 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}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574 ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367 ocfs2_mknod+0x173c/0x2770 fs/ocfs2/namei.c:414 ocfs2_create+0xf4/0x430 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4508 [inline] open_last_lookups fs/namei.c:4608 [inline] path_openat+0x341f/0x4280 fs/namei.c:4860 do_file_open+0x20e/0x430 fs/namei.c:4892 do_sys_openat2+0x10f/0x1e0 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __x64_sys_openat+0x12d/0x210 fs/open.c:1385 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574 ocfs2_start_trans+0x5cc/0x8f0 fs/ocfs2/journal.c:369 ocfs2_local_alloc_slide_window+0x320/0x16d0 fs/ocfs2/localalloc.c:1252 ocfs2_reserve_local_alloc_bits+0x417/0xbe0 fs/ocfs2/localalloc.c:669 ocfs2_reserve_clusters_with_limit+0x55a/0xe80 fs/ocfs2/suballoc.c:1284 ocfs2_symlink+0xf23/0x3b90 fs/ocfs2/namei.c:1921 vfs_symlink fs/namei.c:5660 [inline] vfs_symlink+0x178/0x4d0 fs/namei.c:5639 filename_symlinkat+0x2a6/0x560 fs/namei.c:5685 __do_sys_symlinkat fs/namei.c:5705 [inline] __se_sys_symlinkat fs/namei.c:5700 [inline] __x64_sys_symlinkat+0x9c/0xe0 fs/namei.c:5700 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (sb_internal#3){.+.+}-{0:0}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 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+0x4bb/0x8f0 fs/ocfs2/journal.c:367 ocfs2_remove_btree_range+0x3fc/0x1770 fs/ocfs2/alloc.c:5769 ocfs2_commit_truncate+0x795/0x2010 fs/ocfs2/alloc.c:7383 ocfs2_truncate_for_delete fs/ocfs2/inode.c:735 [inline] ocfs2_wipe_inode+0x569/0x1240 fs/ocfs2/inode.c:902 ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] ocfs2_evict_inode+0x7de/0x14a0 fs/ocfs2/inode.c:1333 evict+0x3c2/0xad0 fs/inode.c:825 iput_final fs/inode.c:2019 [inline] iput.part.0+0x989/0x1050 fs/inode.c:2068 iput+0x35/0x40 fs/inode.c:2034 ocfs2_dentry_iput+0x139/0x330 fs/ocfs2/dcache.c:407 dentry_unlink_inode+0x265/0x470 fs/dcache.c:477 dentry_kill+0x25d/0xc20 fs/dcache.c:826 finish_dput fs/dcache.c:1001 [inline] dput.part.0+0xd7/0x240 fs/dcache.c:1042 dput+0x1f/0x30 fs/dcache.c:1037 end_renaming fs/namei.c:4122 [inline] filename_renameat2+0x7f4/0xa60 fs/namei.c:6194 __do_sys_rename fs/namei.c:6236 [inline] __se_sys_rename fs/namei.c:6232 [inline] __x64_sys_rename+0x81/0xb0 fs/namei.c:6232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 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+0xeb/0xe60 kernel/locking/lockdep.c:3165 check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] ocfs2_xattr_set+0xd4d/0x2bb0 fs/ocfs2/xattr.c:3666 __vfs_setxattr+0x175/0x1e0 fs/xattr.c:223 __vfs_setxattr_noperm+0x127/0x660 fs/xattr.c:257 __vfs_setxattr_locked+0x127/0x2b0 fs/xattr.c:318 vfs_setxattr+0x14a/0x390 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+0x1315/0x5e30 fs/overlayfs/super.c:1560 vfs_get_super fs/super.c:1267 [inline] get_tree_nodev+0xdd/0x190 fs/super.c:1286 vfs_get_tree+0x92/0x320 fs/super.c:1694 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3765 [inline] do_new_mount fs/namespace.c:3841 [inline] path_mount+0x7d0/0x23d0 fs/namespace.c:4161 do_mount fs/namespace.c:4174 [inline] __do_sys_mount fs/namespace.c:4390 [inline] __se_sys_mount fs/namespace.c:4367 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:4367 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 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.1.1232/10768: #0: ffff8880517cc0d8 (&type->s_umount_key#63/1){+.+.}-{4:4}, at: alloc_super fs/super.c:345 [inline] #0: ffff8880517cc0d8 (&type->s_umount_key#63/1){+.+.}-{4:4}, at: sget_fc+0x3c8/0x1d80 fs/super.c:766 #1: ffff88805356e450 (sb_writers#16){.+.+}-{0:0}, at: ovl_make_workdir fs/overlayfs/super.c:674 [inline] #1: ffff88805356e450 (sb_writers#16){.+.+}-{0:0}, at: ovl_get_workdir fs/overlayfs/super.c:836 [inline] #1: ffff88805356e450 (sb_writers#16){.+.+}-{0:0}, at: ovl_fill_super_creds fs/overlayfs/super.c:1449 [inline] #1: ffff88805356e450 (sb_writers#16){.+.+}-{0:0}, at: ovl_fill_super+0xed4/0x5e30 fs/overlayfs/super.c:1560 #2: ffff88805458dda0 (&sb->s_type->i_mutex_key#26){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #2: ffff88805458dda0 (&sb->s_type->i_mutex_key#26){++++}-{4:4}, at: vfs_setxattr+0x120/0x390 fs/xattr.c:343 #3: ffff88805458dae8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x429/0x2bb0 fs/ocfs2/xattr.c:3627 stack backtrace: CPU: 1 UID: 0 PID: 10768 Comm: syz.1.1232 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 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+0xeb/0xe60 kernel/locking/lockdep.c:3165 check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] ocfs2_xattr_set+0xd4d/0x2bb0 fs/ocfs2/xattr.c:3666 __vfs_setxattr+0x175/0x1e0 fs/xattr.c:223 __vfs_setxattr_noperm+0x127/0x660 fs/xattr.c:257 __vfs_setxattr_locked+0x127/0x2b0 fs/xattr.c:318 vfs_setxattr+0x14a/0x390 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+0x1315/0x5e30 fs/overlayfs/super.c:1560 vfs_get_super fs/super.c:1267 [inline] get_tree_nodev+0xdd/0x190 fs/super.c:1286 vfs_get_tree+0x92/0x320 fs/super.c:1694 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3765 [inline] do_new_mount fs/namespace.c:3841 [inline] path_mount+0x7d0/0x23d0 fs/namespace.c:4161 do_mount fs/namespace.c:4174 [inline] __do_sys_mount fs/namespace.c:4390 [inline] __se_sys_mount fs/namespace.c:4367 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:4367 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdd2879de59 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:00007fdd269d5028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fdd28a26180 RCX: 00007fdd2879de59 RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000 RBP: 00007fdd28833e6f R08: 0000200000000400 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdd28a26218 R14: 00007fdd28a26180 R15: 00007ffc26553348 overlayfs: upper fs missing required features. ocfs2: Unmounting device (7,1) on (node local)