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BUG: KASAN: use-after-free in __lock_acquire+0x2cb4/0x3ff0 kernel/locking/lockdep.c:3295
Read of size 8 at addr ffff88809de496f8 by task syz-executor.0/25814

CPU: 1 PID: 25814 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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
FAT-fs (loop5): Directory bread(block 6) failed
 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
 bpf_tcp_remove+0x427/0xa00 kernel/bpf/sockmap.c:335
 bpf_tcp_close+0x12b/0x390 kernel/bpf/sockmap.c:403
 inet_release+0xd7/0x1e0 net/ipv4/af_inet.c:427
 __sock_release+0xcd/0x2a0 net/socket.c:599
 sock_close+0x15/0x20 net/socket.c:1214
 __fput+0x2ce/0x890 fs/file_table.c:278
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fb71ad67d2b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007ffc7faa61c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007fb71ad67d2b
RDX: 00007fb71aecd5c8 RSI: ffffffffffffffff RDI: 0000000000000004
RBP: 00007fb71aec9960 R08: 0000000000000000 R09: 00007fb71aecd5d0
R10: 00007ffc7faa62c0 R11: 0000000000000293 R12: 000000000007d425
R13: 00007ffc7faa62c0 R14: 00007fb71aec7f60 R15: 0000000000000032

Allocated by task 25820:
 kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625
 kmalloc include/linux/slab.h:515 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 sock_map_alloc kernel/bpf/sockmap.c:1675 [inline]
 sock_map_alloc+0x2b8/0x510 kernel/bpf/sockmap.c:1657
 find_and_alloc_map kernel/bpf/syscall.c:130 [inline]
 map_create kernel/bpf/syscall.c:510 [inline]
 __do_sys_bpf kernel/bpf/syscall.c:2408 [inline]
 __se_sys_bpf+0x82a/0x3a20 kernel/bpf/syscall.c:2384
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 19:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 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 ffff88809de495c0
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 312 bytes inside of
 512-byte region [ffff88809de495c0, ffff88809de497c0)
The buggy address belongs to the page:
page:ffffea0002779240 count:1 mapcount:0 mapping:ffff88813bff0940 index:0xffff88809de49ac0
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002ad9d88 ffffea0002a8c7c8 ffff88813bff0940
raw: ffff88809de49ac0 ffff88809de490c0 0000000100000005 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809de49580: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff88809de49600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88809de49680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                                ^
 ffff88809de49700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88809de49780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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