netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'.
INFO: task syz-executor1:6070 blocked for more than 140 seconds.
      Not tainted 4.19.0-rc6-next-20181005+ #88
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1   D18760  6070      1 0x80000004
Call Trace:
 context_switch kernel/sched/core.c:2830 [inline]
 __schedule+0x86c/0x1ed0 kernel/sched/core.c:3479
 schedule+0xfe/0x460 kernel/sched/core.c:3523
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3581
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
 acct_get kernel/acct.c:161 [inline]
 slow_acct_process kernel/acct.c:577 [inline]
 acct_process+0x48b/0x875 kernel/acct.c:605
 do_exit+0x1aaa/0x2610 kernel/exit.c:857
 do_group_exit+0x177/0x440 kernel/exit.c:970
 get_signal+0x8a8/0x1970 kernel/signal.c:2517
 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x41127a
Code: 48 83 c4 18 c3 e8 f6 8c 04 00 eb a4 cc cc cc cc 48 83 ec 10 48 89 6c 24 08 48 8d 6c 24 08 48 8b 05 6b 41 72 00 48 3d 00 00 00 <07> 0f 8e 2d 01 00 00 b8 00 00 00 07 64 48 8b 0c 25 f8 ff ff ff 48
RSP: 002b:00007ffefd242e08 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 00000000019ff99b RCX: 000000000041127a
RDX: 0000000040000000 RSI: 00007ffefd242e40 RDI: ffffffffffffffff
RBP: 00000000000005bf R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000019ff940
R13: 000000000006c109 R14: 000000000000015b R15: 0000000000000001
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 981 Comm: khungtaskd Not tainted 4.19.0-rc6-next-20181005+ #88
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+0x1d3/0x2c4 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.4+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1c2/0x22c 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:144 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline]
 watchdog+0xb39/0x1050 kernel/hung_task.c:265
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57