INFO: task syz-executor.0:15748 blocked for more than 143 seconds.
      Not tainted 5.3.0-rc2+ #59
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D22152 15748   9559 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x8b6/0xcd0 kernel/sched/core.c:3880
 schedule+0x131/0x1e0 kernel/sched/core.c:3944
 schedule_timeout+0x9a/0x2b0 kernel/time/timer.c:1783
 do_wait_for_common+0x359/0x5a0 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+0x2b0/0x3a0 fs/aio.c:895
 __mmput+0x66/0x3a0 kernel/fork.c:1061
 mmput+0x5d/0x70 kernel/fork.c:1085
 exit_mm+0x585/0x640 kernel/exit.c:547
 do_exit+0x5d0/0x2300 kernel/exit.c:866
 do_group_exit+0x15c/0x2b0 kernel/exit.c:983
 get_signal+0x51c/0x1dd0 kernel/signal.c:2729
 do_signal+0x7b/0x720 arch/x86/kernel/signal.c:815
 exit_to_usermode_loop arch/x86/entry/common.c:159 [inline]
 prepare_exit_to_usermode+0x303/0x580 arch/x86/entry/common.c:194
 syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:274
 do_syscall_64+0x126/0x140 arch/x86/entry/common.c:299
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459829
Code: 24 60 48 8b 42 08 48 8b 4a 10 48 8b 5a 18 48 8b 72 20 48 8b 7a 28 48 8b 3f 4c 8b 42 30 48 8b 52 38 48 85 d2 76 62 48 89 44 24 <58> 4c 89 44 24 28 48 89 0c 24 48 89 5c 24 08 48 c7 44 24 10 00 00
RSP: 002b:00007f29119adcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 000000000075bf28 RCX: 0000000000459829
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bf28
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c
R13: 00007ffd3e540e4f R14: 00007f29119ae9c0 R15: 000000000075bf2c
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc2+ #59
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 33 Comm: kworker/u4:2 Not tainted 5.3.0-rc2+ #59
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline]
RIP: 0010:trace_lock_acquire+0x14d/0x1d0 include/trace/events/lock.h:13
Code: 89 d8 48 c1 e8 06 48 8d 3c c5 e0 ef fd 88 be 08 00 00 00 e8 75 29 56 00 48 0f a3 1d 7d bc a1 07 73 52 65 83 05 5f ca a5 7e 01 <48> 8b 05 64 b0 9e 07 e8 47 b1 07 00 85 c0 74 31 80 3d a7 63 9e 07
RSP: 0018:ffff8880a9ac7b38 EFLAGS: 00000082
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff815c335b
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff88fdefe0
RBP: ffff8880a9ac7b78 R08: dffffc0000000000 R09: fffffbfff11fbdfd
R10: fffffbfff11fbdfd R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000002 R15: ffffffff88cd63c0
FS:  0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000000a9616000 CR4: 00000000001406e0
Call Trace:
 lock_acquire+0x125/0x250 kernel/locking/lockdep.c:4411
 rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:208
 rcu_read_lock include/linux/rcupdate.h:592 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:407 [inline]
 batadv_nc_worker+0xdc/0x600 net/batman-adv/network-coding.c:718
 process_one_work+0x83b/0x1150 kernel/workqueue.c:2269
 worker_thread+0xc01/0x1630 kernel/workqueue.c:2415
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352