RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006 RBP: 000000000076c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 R13: 00000000000009fc R14: 00000000004ccb5c R15: 0000000000000000 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 GPs behind) idle=ef2/1/0x4000000000000004 softirq=205493/205494 fqs=1 rcu: (t=10502 jiffies g=281577 q=47) rcu: rcu_preempt kthread starved for 10501 jiffies! g281577 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 28928 10 2 0x80000000 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x4d1/0xf20 kernel/time/timer.c:1806 rcu_gp_kthread+0xcee/0x2060 kernel/rcu/tree.c:2202 kthread+0x34a/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 NMI backtrace for cpu 0 CPU: 0 PID: 5129 Comm: syz-executor.2 Not tainted 4.19.114-syzkaller #0 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+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x170/0x1bb kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x634/0xddc kernel/rcu/tree.c:2682 update_process_times+0x2a/0x70 kernel/time/timer.c:1638 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x2fc/0xd50 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x50 kernel/kcov.c:101 Code: 0a 41 bc f4 ff ff ff e8 5a 1d eb ff 48 c7 05 d6 f7 05 0a 00 00 00 00 e9 24 ec ff ff 90 48 8b 34 24 65 48 8b 04 25 40 ee 01 00 <65> 8b 15 4c 49 9a 7e 81 e2 00 01 1f 00 75 2b 8b 90 d0 12 00 00 83 RSP: 0018:ffff8880ae607c60 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88807dd78040 RBX: 0000000100021845 RCX: dffffc0000000000 RDX: 1ffff11013f5a463 RSI: ffffffff8158c98e RDI: ffff88809fad2328 RBP: ffff88809fad2310 R08: ffff88807dd78040 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff11015cc0f95 R14: 0000000000000000 R15: ffff888010120c90 __mod_timer kernel/time/timer.c:1010 [inline] mod_timer+0x72e/0xfb0 kernel/time/timer.c:1102 call_timer_fn+0x177/0x700 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x5d0/0x1540 kernel/time/timer.c:1697 __do_softirq+0x26c/0x93c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17b/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:544 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:__sanitizer_cov_trace_switch+0x2/0x70 kernel/kcov.c:201 Code: 0f 1f 84 00 00 00 00 00 48 8b 0c 24 48 89 f2 48 89 fe bf 07 00 00 00 e9 ac fe ff ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 41 54 <48> 89 fa 55 48 89 f5 53 48 8b 46 08 48 83 f8 20 74 52 77 39 48 83 RSP: 0018:ffff88805b18f648 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffffffff87a2e563 RBX: 0000000000000000 RCX: 0000000000000003 RDX: 1ffffffff0f45cac RSI: ffffffff8828eee0 RDI: 0000000000000078 RBP: ffff88805b18f770 R08: ffff88807dd78040 R09: 000000000000002d R10: ffffed104332ae98 R11: ffff8882199574c3 R12: 0000000000000078 R13: ffffffff87a2e560 R14: 1ffff1100b631ece R15: 0000000000000001 format_decode+0x3a5/0xad0 lib/vsprintf.c:2104 vsnprintf+0x155/0x14f0 lib/vsprintf.c:2245 seq_vprintf+0xe2/0x1a0 fs/seq_file.c:391 seq_printf+0xbb/0xf0 fs/seq_file.c:406 proc_keys_show+0x783/0xbf0 security/keys/proc.c:226 seq_read+0x4b9/0x10f0 fs/seq_file.c:229 proc_reg_read+0x1bd/0x280 fs/proc/inode.c:231 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x46b/0x640 fs/read_write.c:925 vfs_readv+0xf0/0x160 fs/read_write.c:987 do_preadv+0x1b6/0x270 fs/read_write.c:1071 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c879 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9814e7ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007f9814e7f6d4 RCX: 000000000045c879 RDX: 00000000000003da RSI: 00000000200017c0 RDI: 0000000000000004 RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000085a R14: 00000000004cb1cc R15: 000000000076bfac netlink: 'syz-executor.1': attribute type 5 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 'syz-executor.5': attribute type 5 has an invalid length.