INFO: task syz-executor.0:25172 blocked for more than 143 seconds.
      Not tainted 5.3.0-rc5+ #85
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D28808 25172    829 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x755/0x1580 kernel/sched/core.c:3880
 schedule+0xa8/0x270 kernel/sched/core.c:3944
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4003
 __mutex_lock_common kernel/locking/mutex.c:1007 [inline]
 __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1077
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092
 genl_lock net/netlink/genetlink.c:33 [inline]
 genl_rcv_msg+0x13e/0x170 net/netlink/genetlink.c:652
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
 genl_rcv+0x29/0x40 net/netlink/genetlink.c:665
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x8a5/0xd60 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:657
 ___sys_sendmsg+0x803/0x920 net/socket.c:2311
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2356
 __do_sys_sendmsg net/socket.c:2365 [inline]
 __se_sys_sendmsg net/socket.c:2363 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2363
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459879
Code: Bad RIP value.
RSP: 002b:00007f0b711dfc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0b711e06d4
R13: 00000000004c773e R14: 00000000004dcf58 R15: 00000000ffffffff
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc5+ #85
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+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
 watchdog+0x9d0/0xef0 kernel/hung_task.c:289
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 25167 Comm: syz-executor.1 Not tainted 5.3.0-rc5+ #85
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:validate_nla lib/nlattr.c:176 [inline]
RIP: 0010:__nla_validate_parse+0x470/0x1ed0 lib/nlattr.c:381
Code: e1 07 38 ca 7f 08 84 d2 0f 85 4a 15 00 00 0f b6 b0 e0 67 c8 87 31 ff 40 88 b5 20 ff ff ff e8 77 21 24 fe 0f b6 b5 20 ff ff ff <40> 84 f6 0f 84 e6 0c 00 00 e8 22 20 24 fe 0f b6 b5 20 ff ff ff 8d
RSP: 0018:ffff88806c4decd0 EFLAGS: 00000297
RAX: 0000000000000002 RBX: 0000000000000008 RCX: ffffffff834e50f9
RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff88806c4dedb8 R08: ffff8880617de280 R09: ffff88806c4deee8
R10: ffffed100d89bde9 R11: ffff88806c4def4f R12: 0000000000000008
R13: 0000000000000002 R14: ffff88806a5d1b58 R15: ffff88806c4deee8
FS:  00007f1868142700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000045984f CR3: 0000000061b85000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __nla_parse+0x43/0x60 lib/nlattr.c:478
 nla_parse_nested_deprecated include/net/netlink.h:1166 [inline]
 tipc_nl_publ_dump+0x907/0xd60 net/tipc/socket.c:3601
 __tipc_nl_compat_dumpit.isra.0+0x21a/0x930 net/tipc/netlink_compat.c:207
 tipc_nl_compat_publ_dump net/tipc/netlink_compat.c:1002 [inline]
 tipc_nl_compat_sk_dump+0x54d/0x970 net/tipc/netlink_compat.c:1054
 __tipc_nl_compat_dumpit.isra.0+0x320/0x930 net/tipc/netlink_compat.c:216
 tipc_nl_compat_dumpit+0x24c/0x510 net/tipc/netlink_compat.c:288
 tipc_nl_compat_handle net/tipc/netlink_compat.c:1253 [inline]
 tipc_nl_compat_recv+0x5a0/0xae0 net/tipc/netlink_compat.c:1291
 genl_family_rcv_msg+0x74b/0xf90 net/netlink/genetlink.c:629
 genl_rcv_msg+0xca/0x170 net/netlink/genetlink.c:654
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
 genl_rcv+0x29/0x40 net/netlink/genetlink.c:665
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x8a5/0xd60 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:657
 ___sys_sendmsg+0x803/0x920 net/socket.c:2311
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2356
 __do_sys_sendmsg net/socket.c:2365 [inline]
 __se_sys_sendmsg net/socket.c:2363 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2363
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459879
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1868141c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000007
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f18681426d4
R13: 00000000004c773e R14: 00000000004dcf58 R15: 00000000ffffffff