audit: type=1804 audit(1555977844.773:204): pid=32447 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir580887337/syzkaller.TcY1ou/543/bus" dev="sda1" ino=16664 res=1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
INFO: rcu_preempt self-detected stall on CPU
	1-...: (1 GPs behind) idle=602/140000000000001/0 softirq=85337/85338 fqs=2 
	 (t=10500 jiffies g=24480 c=24479 q=68)
rcu_preempt kthread starved for 10494 jiffies! g24480 c24479 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
rcu_preempt     R  running task    29776     8      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2807 [inline]
 __schedule+0x7be/0x1cf0 kernel/sched/core.c:3383
 schedule+0x92/0x1c0 kernel/sched/core.c:3427
 schedule_timeout+0x43e/0xe10 kernel/time/timer.c:1744
 rcu_gp_kthread+0xbf4/0x1ec0 kernel/rcu/tree.c:2255
 kthread+0x31c/0x430 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402
NMI backtrace for cpu 1
CPU: 1 PID: 32416 Comm: syz-executor.2 Not tainted 4.14.113 #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
 nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x141/0x189 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline]
 rcu_dump_cpu_stacks+0x186/0x1d2 kernel/rcu/tree.c:1396
 print_cpu_stall kernel/rcu/tree.c:1542 [inline]
 check_cpu_stall kernel/rcu/tree.c:1610 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0x43d/0xd0a kernel/rcu/tree.c:2792
 update_process_times+0x31/0x70 kernel/time/timer.c:1588
 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161
 tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1219
 __run_hrtimer kernel/time/hrtimer.c:1220 [inline]
 __hrtimer_run_queues+0x273/0xbd0 kernel/time/hrtimer.c:1284
 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1318
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
 smp_apic_timer_interrupt+0x12c/0x600 arch/x86/kernel/apic/apic.c:1062
 apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:787
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x60 kernel/kcov.c:65
RSP: 0018:ffff88806f937530 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: ffff88806e7b61c0 RBX: 0000000000000000 RCX: ffffc9000686a000
RDX: 0000000000040000 RSI: ffffffff82d5e09d RDI: ffff8880a53d7808
RBP: ffff88806f937598 R08: 1ffff110126a9347 R09: ffffed10126a9348
R10: ffffed10126a9347 R11: ffff888093549a3d R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
 generic_perform_write+0x25c/0x490 mm/filemap.c:3032
 __generic_file_write_iter+0x239/0x5b0 mm/filemap.c:3149
 ext4_file_write_iter+0x2c0/0xfd0 fs/ext4/file.c:264
 call_write_iter include/linux/fs.h:1774 [inline]
 do_iter_readv_writev+0x41e/0x680 fs/read_write.c:674
 do_iter_write fs/read_write.c:953 [inline]
 do_iter_write+0x154/0x550 fs/read_write.c:934
 vfs_iter_write+0x77/0xb0 fs/read_write.c:966
 iter_file_splice_write+0x578/0xae0 fs/splice.c:749
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x126/0x1a0 fs/splice.c:1018
 splice_direct_to_actor+0x2a1/0x7b0 fs/splice.c:973
 do_splice_direct+0x18d/0x230 fs/splice.c:1061
 do_sendfile+0x4db/0xbd0 fs/read_write.c:1440
 SYSC_sendfile64 fs/read_write.c:1501 [inline]
 SyS_sendfile64+0x102/0x110 fs/read_write.c:1487
 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458c29
RSP: 002b:00007f6840466c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458c29
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 00008000fffffffe R11: 0000000000000246 R12: 00007f68404676d4
R13: 00000000004c5e10 R14: 00000000004da5c8 R15: 00000000ffffffff
INFO: rcu_sched detected stalls on CPUs/tasks:
	1-...: (1 GPs behind) idle=602/140000000000001/0 softirq=85335/85338 fqs=2 
	(detected by 0, t=10553 jiffies, g=17617, c=17616, q=8)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 32416 Comm: syz-executor.2 Not tainted 4.14.113 #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88806e7b61c0 task.stack: ffff88806f930000
RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x60 kernel/kcov.c:65
RSP: 0018:ffff88806f9373d8 EFLAGS: 00000282
RAX: ffff88806e7b61c0 RBX: ffff8880724138b8 RCX: ffffc9000686a000
RDX: dffffc0000000000 RSI: ffffffff8616c2c6 RDI: ffff8880724138c0
RBP: ffff88806f937438 R08: 0000000000000000 R09: ffff88806e7b6ab0
R10: ffff88806e7b6a90 R11: ffff88806e7b61c0 R12: ffff888090debdf8
R13: 00000000014200ca R14: dffffc0000000000 R15: dffffc0000000000
FS:  00007f6840467700(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30234000 CR3: 000000005f355000 CR4: 00000000001406e0
Call Trace:
 pagecache_get_page+0x4a/0x750 mm/filemap.c:1442
 grab_cache_page_write_begin+0x74/0xa0 mm/filemap.c:2974
 ext4_da_write_begin+0x24c/0xc30 fs/ext4/inode.c:3055
 generic_perform_write+0x1ff/0x490 mm/filemap.c:3024
 __generic_file_write_iter+0x239/0x5b0 mm/filemap.c:3149
 ext4_file_write_iter+0x2c0/0xfd0 fs/ext4/file.c:264
 call_write_iter include/linux/fs.h:1774 [inline]
 do_iter_readv_writev+0x41e/0x680 fs/read_write.c:674
 do_iter_write fs/read_write.c:953 [inline]
 do_iter_write+0x154/0x550 fs/read_write.c:934
 vfs_iter_write+0x77/0xb0 fs/read_write.c:966
 iter_file_splice_write+0x578/0xae0 fs/splice.c:749
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x126/0x1a0 fs/splice.c:1018
 splice_direct_to_actor+0x2a1/0x7b0 fs/splice.c:973
 do_splice_direct+0x18d/0x230 fs/splice.c:1061
 do_sendfile+0x4db/0xbd0 fs/read_write.c:1440
 SYSC_sendfile64 fs/read_write.c:1501 [inline]
 SyS_sendfile64+0x102/0x110 fs/read_write.c:1487
 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458c29
RSP: 002b:00007f6840466c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458c29
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 00008000fffffffe R11: 0000000000000246 R12: 00007f68404676d4
R13: 00000000004c5e10 R14: 00000000004da5c8 R15: 00000000ffffffff
Code: 4c 89 35 9b ea bd 07 41 be f4 ff ff ff e8 03 43 ee ff 48 c7 05 85 ea bd 07 00 00 00 00 e9 2f ec ff ff 65 48 8b 04 25 40 ee 01 00 <48> 85 c0 74 1a 65 8b 15 bb 06 a5 7e 81 e2 00 01 1f 00 75 0b 8b 
rcu_sched kthread starved for 10548 jiffies! g17617 c17616 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
rcu_sched       R  running task    29776     9      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2807 [inline]
 __schedule+0x7be/0x1cf0 kernel/sched/core.c:3383
 schedule+0x92/0x1c0 kernel/sched/core.c:3427
 schedule_timeout+0x43e/0xe10 kernel/time/timer.c:1744
 rcu_gp_kthread+0xbf4/0x1ec0 kernel/rcu/tree.c:2255
 kthread+0x31c/0x430 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402