rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): ------------[ cut here ]------------ WARNING: CPU: 0 PID: 8632 at kernel/sched/core.c:3013 try_invoke_on_locked_down_task+0x9c/0x120 kernel/sched/core.c:3033 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 8632 Comm: syz-executor.3 Not tainted 5.9.0-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+0xa9/0xd1 lib/dump_stack.c:118 panic+0x135/0x31a kernel/panic.c:231 __warn.cold.13+0x20/0x28 kernel/panic.c:600 report_bug+0xc5/0x100 lib/bug.c:198 handle_bug+0x39/0xa0 arch/x86/kernel/traps.c:234 exc_invalid_op+0x18/0x70 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:try_invoke_on_locked_down_task+0x9c/0x120 kernel/sched/core.c:3013 Code: e8 59 49 e8 01 44 89 e8 48 8b 4d d0 65 48 33 0c 25 28 00 00 00 0f 85 81 00 00 00 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b eb 9e 48 8d 75 c0 48 89 df 45 31 ed e8 51 c0 ff ff 8b 4b 40 RSP: 0018:ffffc90000003db8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff888125592700 RCX: 0000000000000001 RDX: ffffc90000003e4c RSI: ffffffff81268d10 RDI: ffff888125592700 RBP: ffffc90000003e00 R08: ffffffff852e8462 R09: 0000000000000033 R10: ffff888125592a80 R11: 0000000000000000 R12: 000000000002e9c0 R13: ffffffff842e24c0 R14: ffffffff81268d10 R15: ffffc90000003e4c rcu_print_task_stall kernel/rcu/tree_stall.h:267 [inline] print_other_cpu_stall kernel/rcu/tree_stall.h:475 [inline] check_cpu_stall kernel/rcu/tree_stall.h:634 [inline] rcu_pending kernel/rcu/tree.c:3637 [inline] rcu_sched_clock_irq.cold.93+0x24b/0x545 kernel/rcu/tree.c:2519 update_process_times+0x23/0x60 kernel/time/timer.c:1710 tick_sched_handle.isra.24+0x20/0x60 kernel/time/tick-sched.c:176 tick_sched_timer+0x74/0x90 kernel/time/tick-sched.c:1328 __run_hrtimer kernel/time/hrtimer.c:1524 [inline] __hrtimer_run_queues+0x1f1/0x520 kernel/time/hrtimer.c:1588 hrtimer_interrupt+0xfc/0x210 kernel/time/hrtimer.c:1650 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x93/0x2b0 arch/x86/kernel/apic/apic.c:1097 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_apic_timer_interrupt+0xca/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline] RIP: 0010:lock_release+0x156/0x2e0 kernel/locking/lockdep.c:5029 Code: 88 e4 08 00 00 8d 51 ff 66 85 d2 89 90 e4 08 00 00 0f 85 51 01 00 00 48 83 3d bd 4f 07 03 00 0f 84 54 01 00 00 4c 89 f7 57 9d <0f> 1f 44 00 00 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 6d 01 RSP: 0018:ffffc90004a4f308 EFLAGS: 00000282 RAX: ffff888102244000 RBX: ffff888102244000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffff88811e69fa10 RDI: 0000000000000282 RBP: ffffc90004a4f348 R08: 0000000000000028 R09: 0000000000000001 R10: 0000000000000001 R11: 46e81197114dab97 R12: ffff88811e69fa10 R13: ffffffff815802f5 R14: 0000000000000282 R15: 0000000000000002 __raw_read_unlock include/linux/rwlock_api_smp.h:225 [inline] _raw_read_unlock+0x15/0x40 kernel/locking/spinlock.c:255 ext4_es_lookup_extent+0xc5/0x380 fs/ext4/extents_status.c:965 ext4_map_blocks+0x5a/0x580 fs/ext4/inode.c:517 ext4_mpage_readpages+0x59c/0xb50 fs/ext4/readpage.c:304 ext4_readahead+0x2e/0x30 fs/ext4/inode.c:3241 read_pages+0x8a/0x3f0 mm/readahead.c:130 page_cache_readahead_unbounded+0x14c/0x270 mm/readahead.c:244 __do_page_cache_readahead+0x30/0x40 mm/readahead.c:273 ra_submit mm/internal.h:64 [inline] ondemand_readahead+0x200/0x4e0 mm/readahead.c:551 page_cache_async_readahead+0x185/0x2c0 mm/readahead.c:631 generic_file_buffered_read+0x11e/0x770 mm/filemap.c:2113 generic_file_read_iter+0xda/0x150 mm/filemap.c:2405 ext4_file_read_iter+0x58/0x170 fs/ext4/file.c:131 call_read_iter include/linux/fs.h:1876 [inline] new_sync_read+0x104/0x190 fs/read_write.c:415 __kernel_read+0x117/0x170 fs/read_write.c:438 integrity_kernel_read+0x1b/0x20 security/integrity/iint.c:191 ima_calc_file_hash_tfm+0xf4/0x140 security/integrity/ima/ima_crypto.c:484 ima_calc_file_shash security/integrity/ima/ima_crypto.c:515 [inline] ima_calc_file_hash+0x95/0x1b0 security/integrity/ima/ima_crypto.c:580 ima_collect_measurement+0x1e1/0x210 security/integrity/ima/ima_api.c:250 process_measurement+0x5e5/0xad0 security/integrity/ima/ima_main.c:324 ima_file_check+0x62/0x90 security/integrity/ima/ima_main.c:492 do_open fs/namei.c:3253 [inline] path_openat+0x48e/0xa90 fs/namei.c:3368 do_filp_open+0x8e/0x100 fs/namei.c:3395 do_sys_openat2+0x218/0x2d0 fs/open.c:1168 do_sys_open+0x48/0x80 fs/open.c:1184 __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0x1c/0x20 fs/open.c:1188 do_syscall_64+0x31/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45aa69 Code: 2d 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 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff2a40ebc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045aa69 RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020000100 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff2a40ec6d4 R13: 00000000004fe49f R14: 00000000004df528 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..