rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6571 at kernel/sched/core.c:3013 rq_unlock kernel/sched/sched.h:1325 [inline] WARNING: CPU: 1 PID: 6571 at kernel/sched/core.c:3013 try_invoke_on_locked_down_task+0x12d/0x270 kernel/sched/core.c:3019 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 6571 Comm: syz-executor.1 Not tainted 5.9.0-rc1-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+0x1f0/0x31e lib/dump_stack.c:118 panic+0x264/0x7a0 kernel/panic.c:231 __warn+0x227/0x250 kernel/panic.c:600 report_bug+0x1b1/0x2e0 lib/bug.c:198 handle_bug+0x42/0x80 arch/x86/kernel/traps.c:234 exc_invalid_op+0x16/0x40 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+0x12d/0x270 kernel/sched/sched.h:1325 Code: f8 48 c1 e8 03 42 8a 04 38 84 c0 0f 85 10 01 00 00 8b 74 24 18 48 89 ef e8 b0 46 09 00 4c 89 ef e8 e8 d8 db 06 e9 a4 00 00 00 <0f> 0b e9 2b ff ff ff 48 c7 c1 74 41 8f 89 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc90000da88b0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffffff894ff300 RCX: 9d925c65b06d7f00 RDX: ffffc90000da8960 RSI: ffffffff8162d430 RDI: ffff888046d88480 RBP: ffffffff8162d430 R08: ffffffff817ac004 R09: fffffbfff129f89d R10: fffffbfff129f89d R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff894ff300 R14: ffff888046d88480 R15: dffffc0000000000 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+0x12bc/0x1eb0 kernel/rcu/tree.c:2519 update_process_times+0x130/0x1b0 kernel/time/timer.c:1710 tick_sched_handle kernel/time/tick-sched.c:176 [inline] tick_sched_timer+0x25e/0x410 kernel/time/tick-sched.c:1328 __run_hrtimer kernel/time/hrtimer.c:1524 [inline] __hrtimer_run_queues+0x42d/0x930 kernel/time/hrtimer.c:1588 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1650 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline] sysvec_apic_timer_interrupt+0xd0/0xf0 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_acquire+0x1c7/0x730 kernel/locking/lockdep.c:5008 Code: c1 e8 03 80 3c 10 00 74 0c 48 c7 c7 f8 14 4d 89 e8 7e e8 5a 00 48 83 3d 3e 2d f3 07 00 0f 84 08 05 00 00 48 8b 7c 24 10 57 9d <0f> 1f 44 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 50 0f 85 df RSP: 0018:ffffc90000da8d28 EFLAGS: 00000286 RAX: 1ffffffff129a29f RBX: 0000000000000000 RCX: ffffffff815acaa4 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000286 RBP: ffff888028feece4 R08: dffffc0000000000 R09: fffffbfff167dab2 R10: fffffbfff167dab2 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 1ffff110051fdd9c R15: 0000000000000000 call_timer_fn+0x7c/0x160 kernel/time/timer.c:1410 expire_timers kernel/time/timer.c:1458 [inline] __run_timers+0x65e/0x830 kernel/time/timer.c:1755 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1768 __do_softirq+0x236/0x66c kernel/softirq.c:298 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] do_softirq_own_stack+0x91/0xe0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu+0x1e1/0x1f0 kernel/softirq.c:423 irq_exit_rcu+0x5/0x10 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0xd5/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:46 [inline] RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:348 [inline] RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:358 [inline] RIP: 0010:unwind_next_frame+0x1049/0x1e90 arch/x86/kernel/unwind_orc.c:537 Code: 00 00 00 00 00 fc ff df 48 8b 4c 24 28 8a 04 01 84 c0 0f 85 e6 0b 00 00 48 39 eb 76 1d 49 39 ee 77 18 48 8b 44 24 08 83 38 00 <74> 0e 48 8d 45 08 4c 39 f0 76 05 48 39 d8 76 40 48 8b 5c 24 08 48 RSP: 0018:ffffc9001a7ff5b0 EFLAGS: 00000202 RAX: ffffc9001a7ff678 RBX: ffffc9001a800000 RCX: 1ffff920034ffecf RDX: ffffc9001a7ffd30 RSI: 0000000000000000 RDI: ffffc9001a7ff688 RBP: ffffc9001a7ffd28 R08: 0000000000000004 R09: ffffc9001a7ff728 R10: fffff520034ffedb R11: 0000000000000000 R12: 1ffffffff14ea8f3 R13: ffffc9001a7ff678 R14: ffffc9001a7f8000 R15: ffffffff8a75479a arch_stack_walk+0xb4/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xad/0x150 kernel/stacktrace.c:123 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc+0x100/0x130 mm/kasan/common.c:461 slab_post_alloc_hook+0x3e/0x290 mm/slab.h:518 slab_alloc_node mm/slab.c:3254 [inline] kmem_cache_alloc_node+0x1e5/0x280 mm/slab.c:3574 __alloc_skb+0x94/0x4f0 net/core/skbuff.c:198 alloc_skb_fclone include/linux/skbuff.h:1135 [inline] sk_stream_alloc_skb+0x418/0xa60 net/ipv4/tcp.c:884 tcp_sendmsg_locked+0xe5c/0x3ed0 net/ipv4/tcp.c:1291 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1441 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] sock_write_iter+0x317/0x470 net/socket.c:998 call_write_iter include/linux/fs.h:1882 [inline] new_sync_write fs/read_write.c:503 [inline] vfs_write+0xa96/0xd10 fs/read_write.c:578 ksys_write+0x11b/0x220 fs/read_write.c:631 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d579 Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa68f9a9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000038a80 RCX: 000000000045d579 RDX: 00000000c63b9e35 RSI: 00000000200000c0 RDI: 0000000000000005 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007fff7b8d006f R14: 00007fa68f9aa9c0 R15: 000000000118cf4c Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds..