ceph: device name is missing path (no : separator in 01777777777777777777777)
netlink: 'syz-executor.5': attribute type 10 has an invalid length.
netlink: 'syz-executor.1': attribute type 10 has an invalid length.
==================================================================
BUG: KASAN: use-after-free in debugfs_remove+0x10d/0x130 fs/debugfs/inode.c:687
Read of size 8 at addr ffff88803f9deb40 by task kworker/1:5/22626

CPU: 1 PID: 22626 Comm: kworker/1:5 Not tainted 4.19.95-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events __blk_release_queue
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 debugfs_remove+0x10d/0x130 fs/debugfs/inode.c:687
 blk_trace_free+0x38/0x140 kernel/trace/blktrace.c:312
 blk_trace_cleanup kernel/trace/blktrace.c:339 [inline]
 __blk_trace_remove+0x78/0xa0 kernel/trace/blktrace.c:352
 blk_trace_shutdown+0x67/0x90 kernel/trace/blktrace.c:752
 __blk_release_queue+0x260/0x540 block/blk-sysfs.c:855
 process_one_work+0x989/0x1750 kernel/workqueue.c:2153
 worker_thread+0x98/0xe40 kernel/workqueue.c:2296
 kthread+0x354/0x420 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Allocated by task 1408:
 save_stack+0x45/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc mm/kasan/kasan.c:553 [inline]
 kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531
 kasan_slab_alloc+0xf/0x20 mm/kasan/kasan.c:490
 kmem_cache_alloc+0x12e/0x700 mm/slab.c:3559
 __d_alloc+0x2e/0x9c0 fs/dcache.c:1610
 d_alloc+0x4d/0x280 fs/dcache.c:1694
 d_alloc_parallel+0xf4/0x1bb0 fs/dcache.c:2441
 __lookup_slow+0x1ab/0x500 fs/namei.c:1654
 lookup_one_len+0x16d/0x1a0 fs/namei.c:2543
 start_creating fs/debugfs/inode.c:313 [inline]
 start_creating+0xbf/0x1e0 fs/debugfs/inode.c:289
 __debugfs_create_file+0x65/0x400 fs/debugfs/inode.c:352
 debugfs_create_file+0x5a/0x70 fs/debugfs/inode.c:404
 do_blk_trace_setup+0x376/0xb90 kernel/trace/blktrace.c:528
 __blk_trace_setup+0xe3/0x190 kernel/trace/blktrace.c:577
 blk_trace_ioctl+0x170/0x300 kernel/trace/blktrace.c:716
 blkdev_ioctl+0x126/0x1ab6 block/ioctl.c:587
 block_ioctl+0xee/0x130 fs/block_dev.c:1894
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:688
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 20195:
 save_stack+0x45/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3503 [inline]
 kmem_cache_free+0x86/0x260 mm/slab.c:3765
 __d_free+0x20/0x30 fs/dcache.c:257
 __rcu_reclaim kernel/rcu/rcu.h:236 [inline]
 rcu_do_batch kernel/rcu/tree.c:2584 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline]
 rcu_process_callbacks+0xba0/0x1a30 kernel/rcu/tree.c:2881
 __do_softirq+0x25c/0x921 kernel/softirq.c:292

The buggy address belongs to the object at ffff88803f9deb00
 which belongs to the cache dentry(49:syz2) of size 288
The buggy address is located 64 bytes inside of
 288-byte region [ffff88803f9deb00, ffff88803f9dec20)
The buggy address belongs to the page:
page:ffffea0000fe7780 count:1 mapcount:0 mapping:ffff8880a783a380 index:0x0
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffffea0002645988 ffffea00024bb088 ffff8880a783a380
raw: 0000000000000000 ffff88803f9de000 000000010000000b ffff888057f2c000
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff888057f2c000

Memory state around the buggy address:
 ffff88803f9dea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88803f9dea80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
>ffff88803f9deb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff88803f9deb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88803f9dec00: fb fb fb fb fc fc fc fc fc fc fc fc fb fb fb fb
==================================================================
netlink: 10 bytes leftover after parsing attributes in process `syz-executor.3'.
netlink: 'syz-executor.1': attribute type 10 has an invalid length.
ceph: device name is missing path (no : separator in 01777777777777777777777)
openvswitch: netlink: Flow set message rejected, Key attribute missing.