INFO: task syz-executor.4:14467 blocked for more than 143 seconds.
      Not tainted 5.3.0-rc1+ #52
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D26056 14467   9768 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
 rwsem_down_read_slowpath+0x6a5/0xb60 kernel/locking/rwsem.c:1079
 __down_read+0xa8/0x3d0 kernel/locking/rwsem.c:1304
 down_read+0x45/0x50 kernel/locking/rwsem.c:1447
 exit_mm+0xdb/0x640 kernel/exit.c:513
 do_exit+0x5d0/0x2340 kernel/exit.c:865
 do_group_exit+0x15c/0x2b0 kernel/exit.c:982
 __do_sys_exit_group+0x17/0x20 kernel/exit.c:993
 __se_sys_exit_group+0x14/0x20 kernel/exit.c:991
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:991
 do_syscall_64+0xfe/0x140 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459829
Code: Bad RIP value.
RSP: 002b:00007ffdc1cf7b58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000459829
RDX: 0000000000413511 RSI: fffffffffffffff7 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007ffdc1cf7bb0
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffdc1cf7bb0 R14: 0000000000000000 R15: 00007ffdc1cf7bc0
INFO: task syz-executor.4:14476 blocked for more than 143 seconds.
      Not tainted 5.3.0-rc1+ #52
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D25928 14476   9768 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
 rwsem_down_read_slowpath+0x6a5/0xb60 kernel/locking/rwsem.c:1079
 __down_read+0xa8/0x3d0 kernel/locking/rwsem.c:1304
 down_read+0x45/0x50 kernel/locking/rwsem.c:1447
 exit_mm+0xdb/0x640 kernel/exit.c:513
 do_exit+0x5d0/0x2340 kernel/exit.c:865
 do_group_exit+0x15c/0x2b0 kernel/exit.c:982
 get_signal+0x51c/0x1dd0 kernel/signal.c:2728
 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: Bad RIP value.
RSP: 002b:00007f86f060bcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075bf28 RCX: 0000000000459829
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bf28
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c
R13: 00007ffdc1cf794f R14: 00007f86f060c9c0 R15: 000000000075bf2c
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc1+ #52
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: 9777 Comm: kworker/u4:3 Not tainted 5.3.0-rc1+ #52
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue:  0x0 (bat_events)
RIP: 0010:spin_lock_irq include/linux/spinlock.h:363 [inline]
RIP: 0010:worker_thread+0x10e2/0x1630 kernel/workqueue.c:2365
Code: ff ff ff 48 c7 01 02 04 00 00 48 8b 9d 50 ff ff ff 48 89 df e8 7f c0 60 06 e8 0a f1 5f 06 48 89 df e8 72 be 60 06 48 8b 45 a0 <48> bb 00 00 00 00 00 fc ff df 8a 04 18 84 c0 48 8b 55 d0 75 68 f6
RSP: 0018:ffff88807caefdd8 EFLAGS: 00000046
RAX: 1ffff1101376412c RBX: ffff8880aa42a940 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff88807caefd40
RBP: ffff88807caefef8 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffed100f95dfa9 R11: 0000000000000004 R12: ffff8880aa42a990
R13: ffff8880aa42ad00 R14: ffff8880aa42a940 R15: ffff88809bb20900
FS:  0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000148 CR3: 000000008b99a000 CR4: 00000000001406e0
Call Trace:
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352