overlayfs: upper fs does not support tmpfile. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.4.173/6899 is trying to acquire lock: ffff8880783c6d98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] ffff8880783c6d98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: ocfs2_remove_inode fs/ocfs2/inode.c:655 [inline] ffff8880783c6d98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:818 [inline] ffff8880783c6d98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] ffff8880783c6d98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: ocfs2_evict_inode+0x1daa/0x41a0 fs/ocfs2/inode.c:1219 but task is already holding lock: ffff88805de59818 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] ffff88805de59818 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:776 [inline] ffff88805de59818 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] ffff88805de59818 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_evict_inode+0x2d0a/0x41a0 fs/ocfs2/inode.c:1219 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}: down_write+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_del_inode_from_orphan+0x12f/0x7b0 fs/ocfs2/namei.c:2716 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2407 [inline] ocfs2_dio_end_io+0x107a/0x13f0 fs/ocfs2/aops.c:2446 dio_complete+0x24c/0x710 fs/direct-io.c:282 __blockdev_direct_IO+0x2c42/0x32e0 fs/direct-io.c:1308 ocfs2_direct_IO+0x235/0x2a0 fs/ocfs2/aops.c:2483 generic_file_direct_write+0x1c9/0x3e0 mm/filemap.c:3961 __generic_file_write_iter+0x11b/0x230 mm/filemap.c:4117 ocfs2_file_write_iter+0x1724/0x1ef0 fs/ocfs2/file.c:2468 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x747/0xc50 fs/read_write.c:860 vfs_writev fs/read_write.c:933 [inline] do_pwritev+0x242/0x3a0 fs/read_write.c:1030 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}: down_write+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_reserve_suballoc_bits+0x171/0x44a0 fs/ocfs2/suballoc.c:782 ocfs2_reserve_new_metadata_blocks+0x416/0x9a0 fs/ocfs2/suballoc.c:978 ocfs2_mknod+0xea5/0x2310 fs/ocfs2/namei.c:347 ocfs2_mkdir+0x196/0x430 fs/ocfs2/namei.c:657 vfs_mkdir+0x2a5/0x470 fs/namei.c:4121 do_mkdirat+0x1dc/0x450 fs/namei.c:4144 __do_sys_mkdirat fs/namei.c:4159 [inline] __se_sys_mkdirat fs/namei.c:4157 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x37ef/0x7d80 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_remove_inode fs/ocfs2/inode.c:655 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:818 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] ocfs2_evict_inode+0x1daa/0x41a0 fs/ocfs2/inode.c:1219 evict+0x4b7/0x8a0 fs/inode.c:705 ocfs2_dentry_iput+0x24e/0x390 fs/ocfs2/dcache.c:418 __dentry_kill+0x412/0x630 fs/dcache.c:611 dentry_kill+0xb8/0x290 fs/dcache.c:-1 dput+0xfe/0x1e0 fs/dcache.c:918 ovl_check_rename_whiteout fs/overlayfs/super.c:652 [inline] ovl_make_workdir fs/overlayfs/super.c:751 [inline] ovl_get_workdir+0xb02/0x17c0 fs/overlayfs/super.c:874 ovl_fill_super+0x151a/0x3970 fs/overlayfs/super.c:1427 vfs_get_super fs/super.c:1346 [inline] get_tree_nodev+0xb5/0x140 fs/super.c:1365 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24a/0xa40 fs/namespace.c:3386 do_mount fs/namespace.c:3726 [inline] __do_sys_mount fs/namespace.c:3935 [inline] __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7 --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5 --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type] Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7); *** DEADLOCK *** 5 locks held by syz.4.173/6899: #0: ffff88807d9580e0 (&type->s_umount_key#61/1){+.+.}-{3:3}, at: alloc_super+0x1fb/0x910 fs/super.c:352 #1: ffff88801fb78418 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412 #2: ffff8880783c5118 (&sb->s_type->i_mutex_key#28/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline] #2: ffff8880783c5118 (&sb->s_type->i_mutex_key#28/1){+.+.}-{3:3}, at: ovl_check_rename_whiteout fs/overlayfs/super.c:614 [inline] #2: ffff8880783c5118 (&sb->s_type->i_mutex_key#28/1){+.+.}-{3:3}, at: ovl_make_workdir fs/overlayfs/super.c:751 [inline] #2: ffff8880783c5118 (&sb->s_type->i_mutex_key#28/1){+.+.}-{3:3}, at: ovl_get_workdir+0x6ce/0x17c0 fs/overlayfs/super.c:874 #3: ffff888026db4bd0 (&osb->nfs_sync_rwlock){.+.+}-{3:3}, at: ocfs2_nfs_sync_lock+0x107/0x270 fs/ocfs2/dlmglue.c:2876 #4: ffff88805de59818 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #4: ffff88805de59818 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:776 [inline] #4: ffff88805de59818 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] #4: ffff88805de59818 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_evict_inode+0x2d0a/0x41a0 fs/ocfs2/inode.c:1219 stack backtrace: CPU: 0 PID: 6899 Comm: syz.4.173 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 check_noncircular+0x2fc/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x37ef/0x7d80 kernel/locking/lockdep.c:5137 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 down_write+0x97/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_remove_inode fs/ocfs2/inode.c:655 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:818 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] ocfs2_evict_inode+0x1daa/0x41a0 fs/ocfs2/inode.c:1219 evict+0x4b7/0x8a0 fs/inode.c:705 ocfs2_dentry_iput+0x24e/0x390 fs/ocfs2/dcache.c:418 __dentry_kill+0x412/0x630 fs/dcache.c:611 dentry_kill+0xb8/0x290 fs/dcache.c:-1 dput+0xfe/0x1e0 fs/dcache.c:918 ovl_check_rename_whiteout fs/overlayfs/super.c:652 [inline] ovl_make_workdir fs/overlayfs/super.c:751 [inline] ovl_get_workdir+0xb02/0x17c0 fs/overlayfs/super.c:874 ovl_fill_super+0x151a/0x3970 fs/overlayfs/super.c:1427 vfs_get_super fs/super.c:1346 [inline] get_tree_nodev+0xb5/0x140 fs/super.c:1365 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24a/0xa40 fs/namespace.c:3386 do_mount fs/namespace.c:3726 [inline] __do_sys_mount fs/namespace.c:3935 [inline] __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fae1bb9ce59 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:00007fae1caf0028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fae1be16090 RCX: 00007fae1bb9ce59 RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000 RBP: 00007fae1bc32e6f R08: 0000200000000400 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fae1be16128 R14: 00007fae1be16090 R15: 00007fff636d3828 overlayfs: upper fs does not support RENAME_WHITEOUT. overlayfs: upper fs missing required features.