hrtimer: interrupt took 33078 ns rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=10133, q=46) rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295018832-4295008329), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor758 R running task 23704 10149 10143 0x80004000 Call Trace: <IRQ> sched_show_task kernel/sched/core.c:5954 [inline] sched_show_task.cold+0x2ee/0x35d kernel/sched/core.c:5929 print_other_cpu_stall kernel/rcu/tree_stall.h:410 [inline] check_cpu_stall kernel/rcu/tree_stall.h:538 [inline] rcu_pending kernel/rcu/tree.c:2827 [inline] rcu_sched_clock_irq.cold+0xaf4/0xc02 kernel/rcu/tree.c:2271 update_process_times+0x2d/0x70 kernel/time/timer.c:1726 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1310 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 </IRQ> RIP: 0010:loop1+0x45f/0x892 Code: e6 44 01 f0 44 01 f8 01 f0 c5 4d fe 8f c0 81 3e 89 c5 7d 7f 4c 3c 40 89 c6 c4 63 7b f0 ea 19 c4 63 7b f0 f2 0b 44 03 5c 3c 40 <09> ce c4 e3 55 0f c4 04 45 89 cf c4 63 7b f0 e0 0d 45 31 f5 45 31 RSP: 0018:ffffc90001ecf080 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 000000003b2f3fc4 RBX: 00000000459b3315 RCX: 00000000c5620a24 RDX: 00000000ca340699 RSI: 000000003b2f3fc4 RDI: 0000000000000100 RBP: ffffc90001ecf318 R08: 0000000089e134e7 R09: 0000000041ed1404 R10: 000000001b10d762 R11: 00000000d31ce98c R12: 0000000001813005 R13: 000000001a034ce5 R14: 00000000d3394680 R15: 000000009815a0bd sha256_avx2_update+0x2d/0x40 arch/x86/crypto/sha256_ssse3_glue.c:236 crypto_shash_update+0xc9/0x120 crypto/shash.c:120 ima_calc_file_hash_tfm+0x321/0x3e0 security/integrity/ima/ima_crypto.c:369 ima_calc_file_shash security/integrity/ima/ima_crypto.c:389 [inline] ima_calc_file_hash+0x1aa/0x570 security/integrity/ima/ima_crypto.c:454 ima_collect_measurement+0x534/0x5f0 security/integrity/ima/ima_api.c:247 process_measurement+0xd45/0x1850 security/integrity/ima/ima_main.c:326 ima_file_check+0xc5/0x110 security/integrity/ima/ima_main.c:442 do_last fs/namei.c:3424 [inline] path_openat+0x1138/0x4500 fs/namei.c:3537 do_filp_open+0x1a1/0x280 fs/namei.c:3567 do_sys_open+0x3fe/0x5d0 fs/open.c:1097 __do_sys_open fs/open.c:1115 [inline] __se_sys_open fs/open.c:1110 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1110 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x447709 Code: e8 3c e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 ab 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fad9ada8db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000006ddc28 RCX: 0000000000447709 RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020000100 RBP: 00000000006ddc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc2c R13: 00007ffd1200009f R14: 00007fad9ada99c0 R15: 0000000000000000 rcu: rcu_preempt kthread starved for 10555 jiffies! g10133 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29264 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3385 [inline] __schedule+0x934/0x1f90 kernel/sched/core.c:4081 schedule+0xdc/0x2b0 kernel/sched/core.c:4155 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1895 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline] rcu_gp_kthread+0x9b2/0x18d0 kernel/rcu/tree.c:1821 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352