ldm_validate_partition_table(): Disk read failed.
Dev loop0: unable to read RDB block 0
 loop0: unable to read partition table
loop_reread_partitions: partition scan of loop0 (�) failed (rc=-5)
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x2cb4/0x3ff0 kernel/locking/lockdep.c:3295
Read of size 8 at addr ffff888052c26320 by task kworker/0:35/27304

CPU: 0 PID: 27304 Comm: kworker/0:35 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: events l2cap_chan_timeout
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
 __lock_acquire+0x2cb4/0x3ff0 kernel/locking/lockdep.c:3295
 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:168
 spin_lock_bh include/linux/spinlock.h:334 [inline]
 lock_sock_nested+0x3b/0x110 net/core/sock.c:2884
 l2cap_sock_teardown_cb+0xa0/0x6d0 net/bluetooth/l2cap_sock.c:1348
 l2cap_chan_del+0xbc/0xa50 net/bluetooth/l2cap_core.c:603
 l2cap_chan_close+0x1b5/0x950 net/bluetooth/l2cap_core.c:761
 l2cap_chan_timeout+0x17e/0x2f0 net/bluetooth/l2cap_core.c:430
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Allocated by task 3342:
 __do_kmalloc_node mm/slab.c:3689 [inline]
 __kmalloc_node+0x4c/0x70 mm/slab.c:3696
 kmalloc_node include/linux/slab.h:557 [inline]
 kvmalloc_node+0x61/0xf0 mm/util.c:423
 kvmalloc include/linux/mm.h:577 [inline]
 kvmalloc_array include/linux/mm.h:595 [inline]
 __alloc_bucket_spinlocks+0x64/0x160 lib/bucket_locks.c:34
 bucket_table_alloc+0x11b/0x440 lib/rhashtable.c:194
 rhashtable_init+0x3bc/0x810 lib/rhashtable.c:1069
 inet_frags_init_net include/net/inet_frag.h:111 [inline]
 nf_ct_net_init+0x137/0x3c0 net/ipv6/netfilter/nf_conntrack_reasm.c:507
 ops_init+0xb3/0x410 net/core/net_namespace.c:129
 setup_net+0x2c2/0x720 net/core/net_namespace.c:316
 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:439
 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107
 copy_namespaces+0x325/0x3c0 kernel/nsproxy.c:165
 copy_process.part.0+0x3a59/0x8260 kernel/fork.c:1916
 copy_process kernel/fork.c:1710 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2219
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 8193:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 kvfree+0x59/0x60 mm/util.c:452
 bucket_table_free+0x80/0x170 lib/rhashtable.c:107
 rhashtable_free_and_destroy+0x15e/0x970 lib/rhashtable.c:1167
 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153
 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

The buggy address belongs to the object at ffff888052c26280
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 160 bytes inside of
 2048-byte region [ffff888052c26280, ffff888052c26a80)
The buggy address belongs to the page:
page:ffffea00014b0980 count:1 mapcount:0 mapping:ffff88813bff0c40 index:0xffff888052c26b00 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea0002774688 ffffea000252c308 ffff88813bff0c40
raw: ffff888052c26b00 ffff888052c26280 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888052c26200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888052c26280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888052c26300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                               ^
 ffff888052c26380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888052c26400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================