INFO: task syz-executor.1:10347 blocked for more than 143 seconds.
      Not tainted 5.3.0-rc2+ #82
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D24544 10347      1 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
 rwsem_down_write_slowpath+0x708/0xf60 kernel/locking/rwsem.c:1214
 __down_write kernel/locking/rwsem.c:1365 [inline]
 down_write+0x13c/0x150 kernel/locking/rwsem.c:1501
 inode_lock include/linux/fs.h:778 [inline]
 vfs_unlink+0xd5/0x620 fs/namei.c:3990
 do_unlinkat+0x3f7/0x6d0 fs/namei.c:4063
 __do_sys_unlink fs/namei.c:4110 [inline]
 __se_sys_unlink fs/namei.c:4108 [inline]
 __x64_sys_unlink+0x42/0x50 fs/namei.c:4108
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459577
Code: Bad RIP value.
RSP: 002b:00007ffe852b2998 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000459577
RDX: 00007ffe852b29b0 RSI: 00007ffe852b29b0 RDI: 00007ffe852b2a40
RBP: 000000000000241c R08: 0000000000000000 R09: 000000000000000c
R10: 0000000000000005 R11: 0000000000000246 R12: 00007ffe852b3ad0
R13: 00005555568c9940 R14: 0000000000000000 R15: 00007ffe852b3ad0
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc2+ #82
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3905 Comm: udevd Not tainted 5.3.0-rc2+ #82
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:142 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:166 [inline]
RIP: 0010:check_memory_region_inline mm/kasan/generic.c:182 [inline]
RIP: 0010:check_memory_region+0x180/0x1a0 mm/kasan/generic.c:192
Code: c1 41 83 e1 07 49 29 c1 74 a4 4c 89 c0 4f 8d 04 08 eb 09 48 83 c0 01 4c 39 c0 74 92 80 38 00 74 f2 e9 3a ff ff ff 4d 0f be 02 <41> 83 e3 07 b8 01 00 00 00 4d 39 c3 0f 8c 31 ff ff ff eb 9b 49 89
RSP: 0018:ffff888092a8fb18 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffffed1012551f6f RCX: ffffffff8159e5f4
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888092a8fb70
RBP: ffff888092a8fb30 R08: 0000000000000004 R09: ffffed1012551f6f
R10: ffffed1012551f6e R11: ffff888092a8fb73 R12: ffffed1012551f6e
R13: 1ffff11012551f6a R14: ffff8880922f6df0 R15: ffff888092a8fbb0
FS:  00007f3a2f1a67a0(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000000928f2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __kasan_check_write+0x14/0x20 mm/kasan/common.c:98
 atomic_try_cmpxchg include/asm-generic/atomic-instrumented.h:694 [inline]
 queued_write_lock include/asm-generic/qrwlock.h:92 [inline]
 do_raw_write_lock+0x124/0x290 kernel/locking/spinlock_debug.c:207
 __raw_write_lock_irq include/linux/rwlock_api_smp.h:197 [inline]
 _raw_write_lock_irq+0x68/0x80 kernel/locking/spinlock.c:311
 ep_scan_ready_list+0x313/0xb20 fs/eventpoll.c:706
 ep_send_events fs/eventpoll.c:1793 [inline]
 ep_poll+0x1f9/0xe60 fs/eventpoll.c:1930
 do_epoll_wait+0x210/0x260 fs/eventpoll.c:2294
 __do_sys_epoll_wait fs/eventpoll.c:2304 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2301 [inline]
 __x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2301
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f3a2e8ba943
Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24
RSP: 002b:00007ffcf7249d78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007f3a2e8ba943
RDX: 0000000000000008 RSI: 00007ffcf7249e70 RDI: 000000000000000a
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000001469510 R15: 000000000142e030