INFO: task syz-executor241:9576 blocked for more than 143 seconds.
      Not tainted 5.3.0-rc4+ #78
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor241 D27368  9576   9272 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x877/0xc50 kernel/sched/core.c:3880
 schedule+0x131/0x1e0 kernel/sched/core.c:3944
 schedule_timeout+0x46/0x240 kernel/time/timer.c:1783
 do_wait_for_common+0x2e7/0x4d0 kernel/sched/completion.c:83
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x47/0x60 kernel/sched/completion.c:136
 exit_aio+0x2a0/0x370 fs/aio.c:895
 __mmput+0x66/0x3a0 kernel/fork.c:1061
 mmput+0x5d/0x70 kernel/fork.c:1085
 exit_mm+0x50a/0x590 kernel/exit.c:547
 do_exit+0x565/0x21a0 kernel/exit.c:866
 do_group_exit+0x15c/0x2b0 kernel/exit.c:983
 __do_sys_exit_group+0x17/0x20 kernel/exit.c:994
 __se_sys_exit_group+0x14/0x20 kernel/exit.c:992
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:992
 do_syscall_64+0xfe/0x140 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440818
Code: 20 25 73 5d 20 2d 20 63 68 61 6e 67 69 6e 67 20 74 6f 20 31 2e 0a 00 00 00 00 72 73 79 73 6c 6f 67 64 3a 20 49 6e 76 61 6c 69 <64> 20 2d 74 20 25 73 20 63 6f 6d 6d 61 6e 64 20 6c 69 6e 65 20 6f
RSP: 002b:00007fff5af7c708 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440818
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004c0f10 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d3180 R14: 0000000000000000 R15: 0000000000000000
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc4+ #78
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+0x1d8/0x2f8 lib/dump_stack.c:113
 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace+0x17/0x20 include/linux/nmi.h:146
 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
 watchdog+0xbb9/0xbd0 kernel/hung_task.c:289
 kthread+0x332/0x350 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 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60