netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'.
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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 ffff8880b0cab8c8 by task syz-executor.3/22028

CPU: 1 PID: 22028 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
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]
 psock_map_pop.constprop.0+0x28/0x1f0 kernel/bpf/sockmap.c:302
 bpf_tcp_remove+0x47d/0xa00 kernel/bpf/sockmap.c:366
 bpf_tcp_close+0x12b/0x390 kernel/bpf/sockmap.c:403
 inet_release+0xd7/0x1e0 net/ipv4/af_inet.c:427
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:472
 __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: 0033:0x7fed044ff0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fed02a71168 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007fed0461ef80 RCX: 00007fed044ff0c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007fed0455aae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
dccp_close: ABORT with 3 bytes unread
R13: 00007ffec4b52eef R14: 00007fed02a71300 R15: 0000000000022000

Allocated by task 22028:
 kmem_cache_alloc_node_trace+0x151/0x3b0 mm/slab.c:3668
 kmalloc_node include/linux/slab.h:553 [inline]
 kzalloc_node include/linux/slab.h:720 [inline]
 smap_init_psock kernel/bpf/sockmap.c:1636 [inline]
 __sock_map_ctx_update_elem.constprop.0+0x366/0xea0 kernel/bpf/sockmap.c:1940
 sock_hash_ctx_update_elem.isra.0+0x69d/0x1100 kernel/bpf/sockmap.c:2411
 sock_hash_update_elem+0x210/0x480 kernel/bpf/sockmap.c:2495
 map_update_elem kernel/bpf/syscall.c:821 [inline]
 __do_sys_bpf kernel/bpf/syscall.c:2414 [inline]
 __se_sys_bpf+0x2cf1/0x3a20 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 4385:
 __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 ffff8880b0cab680
 which belongs to the cache kmalloc-1024 of size 1024
The buggy address is located 584 bytes inside of
 1024-byte region [ffff8880b0cab680, ffff8880b0caba80)
The buggy address belongs to the page:
page:ffffea0002c32a80 count:1 mapcount:0 mapping:ffff88813bff0ac0 index:0xffff8880b0caa000 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea0002b85c08 ffffea0002917208 ffff88813bff0ac0
raw: ffff8880b0caa000 ffff8880b0caa000 0000000100000005 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880b0cab780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880b0cab800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880b0cab880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                              ^
 ffff8880b0cab900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880b0cab980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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