rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (14588 ticks this GP) idle=cce/1/0x4000000000000002 softirq=78476/78478 fqs=5250 (t=10502 jiffies g=94769 q=44361) NMI backtrace for cpu 1 CPU: 1 PID: 13250 Comm: syz-executor.0 Not tainted 5.5.0-rc3-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+0x197/0x210 lib/dump_stack.c:118 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_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2827 [inline] rcu_sched_clock_irq.cold+0x509/0xc02 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 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x90/0xe0 kernel/locking/spinlock.c:191 Code: 48 c7 c0 d8 34 93 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d ff 71 ca 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 a1 f8 87 f9 65 8b 05 92 5b 39 78 RSP: 0018:ffffc900079cdcc0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff132669b RBX: 0000000000000282 RCX: 0000000000000006 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000282 RBP: ffffc900079cdcd0 R08: 1ffffffff1659bbc R09: fffffbfff1659bbd R10: fffffbfff1659bbc R11: ffffffff8b2cdde7 R12: ffff88807ea1e7d8 R13: 0000000000000001 R14: ffff88807ea1e7d0 R15: 0000000000000000 spin_unlock_irqrestore include/linux/spinlock.h:393 [inline] __remove_mapping+0x575/0xd70 mm/vmscan.c:940 shrink_page_list+0x2c2a/0x5550 mm/vmscan.c:1439 shrink_inactive_list+0x4e5/0xe30 mm/vmscan.c:1959 shrink_list mm/vmscan.c:2178 [inline] shrink_lruvec+0x661/0x12f0 mm/vmscan.c:2496 shrink_node_memcgs mm/vmscan.c:2685 [inline] shrink_node+0x401/0x1ad0 mm/vmscan.c:2791 shrink_zones mm/vmscan.c:2996 [inline] do_try_to_free_pages+0x3ba/0x14f0 mm/vmscan.c:3049 try_to_free_mem_cgroup_pages+0x30c/0xa70 mm/vmscan.c:3371 try_charge+0x628/0x14d0 mm/memcontrol.c:2455 mem_cgroup_try_charge+0x136/0x590 mm/memcontrol.c:6404 __add_to_page_cache_locked+0x43f/0xec0 mm/filemap.c:866 add_to_page_cache_lru+0x1d8/0x790 mm/filemap.c:943 ext4_mpage_readpages+0x46d/0x2220 fs/ext4/readpage.c:247 ext4_readpages+0xe7/0x130 fs/ext4/inode.c:3244 read_pages+0x108/0x610 mm/readahead.c:126 __do_page_cache_readahead+0x4e0/0x5d0 mm/readahead.c:212 ra_submit mm/internal.h:62 [inline] ondemand_readahead+0x55c/0xd30 mm/readahead.c:492 page_cache_async_readahead mm/readahead.c:574 [inline] page_cache_async_readahead+0x437/0x7c0 mm/readahead.c:547 generic_file_buffered_read mm/filemap.c:2059 [inline] generic_file_read_iter+0x13c0/0x2cf0 mm/filemap.c:2324 ext4_file_read_iter fs/ext4/file.c:130 [inline] ext4_file_read_iter+0x1db/0x640 fs/ext4/file.c:113 call_read_iter include/linux/fs.h:1896 [inline] new_sync_read+0x4d7/0x800 fs/read_write.c:414 __vfs_read+0xe1/0x110 fs/read_write.c:427 integrity_kernel_read+0x157/0x210 security/integrity/iint.c:200 ima_calc_file_hash_tfm+0x2e3/0x3e0 security/integrity/ima/ima_crypto.c:360 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: 0033:0x45a919 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:00007fd3e81f8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a919 RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020002000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd3e81f96d4 R13: 00000000004fdd5f R14: 00000000004deff0 R15: 00000000ffffffff