------------[ cut here ]------------
WARNING: net/core/sock_map.c:1667 at sock_map_destroy+0x2fe/0x870 net/core/sock_map.c:1667, CPU#0: syz.0.1806/11924
Modules linked in:
CPU: 0 UID: 0 PID: 11924 Comm: syz.0.1806 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:sock_map_destroy+0x2fe/0x870 net/core/sock_map.c:1667
Code: 5f c3 cc cc cc cc e8 61 d2 5a f8 4c 89 ee 4c 89 e7 e8 56 74 ff ff e8 51 d2 5a f8 49 81 ff 90 26 64 89 75 8d e8 43 d2 5a f8 90 <0f> 0b 90 eb 9a e8 38 d2 5a f8 48 89 eb 31 ff 48 83 e3 f8 48 89 de
RSP: 0018:ffffc900036bfb38 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffffff9b0bd6a0 RCX: ffffc900036bfafc
RDX: ffff88805dd224c0 RSI: ffffffff8964298d RDI: ffffffff9b0bd6d8
RBP: ffff888034eae168 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffff88805dd22ff0 R12: ffff888053f88d40
R13: 0000000000000000 R14: 1ffff920006d7f68 R15: ffffffff89642690
FS:  0000555580338500(0000) GS:ffff8880d68f4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c420d27 CR3: 00000000314e7000 CR4: 0000000000352ef0
DR0: 0000000000000008 DR1: 0000000000000004 DR2: 00000000000000ed
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inet_csk_destroy_sock+0x1a2/0x3d0 net/ipv4/inet_connection_sock.c:1271
 __tcp_close+0xced/0x1120 net/ipv4/tcp.c:3285
 tcp_close+0x28/0x120 net/ipv4/tcp.c:3297
 sock_map_close+0x3f3/0x9d0 net/core/sock_map.c:1705
 inet_release+0xed/0x200 net/ipv4/af_inet.c:437
 inet6_release+0x4f/0x70 net/ipv6/af_inet6.c:487
 __sock_release+0xb3/0x270 net/socket.c:662
 sock_close+0x1c/0x30 net/socket.c:1455
 __fput+0x402/0xb70 fs/file_table.c:468
 task_work_run+0x150/0x240 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
 exit_to_user_mode_loop+0xfb/0x540 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbed4b8f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd6c7185a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000028aef RCX: 00007fbed4b8f7c9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fbed4de7da0 R08: 0000000000000001 R09: 000000096c71889f
R10: 0000001b2e820000 R11: 0000000000000246 R12: 00007fbed4de5fac
R13: 00007fbed4de5fa0 R14: ffffffffffffffff R15: 00007ffd6c7186c0
 </TASK>