rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (10499 ticks this GP) idle=ef6/1/0x4000000000000002 softirq=24557/24557 fqs=11 rcu: (t=10501 jiffies g=30241 q=258) rcu: rcu_preempt kthread starved for 10480 jiffies! g30241 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29168 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_timeout+0x4db/0xfd0 kernel/time/timer.c:1803 rcu_gp_fqs_loop kernel/rcu/tree.c:1971 [inline] rcu_gp_kthread+0x962/0x17b0 kernel/rcu/tree.c:2128 kthread+0x357/0x430 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 0 CPU: 0 PID: 13801 Comm: syz-executor.1 Not tainted 5.0.0+ #11 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 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.c:1223 print_cpu_stall kernel/rcu/tree.c:1360 [inline] check_cpu_stall kernel/rcu/tree.c:1434 [inline] rcu_pending kernel/rcu/tree.c:3103 [inline] rcu_sched_clock_irq.cold+0x500/0xa4a kernel/rcu/tree.c:2544 update_process_times+0x32/0x80 kernel/time/timer.c:1635 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x33e/0xde0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:preempt_count_add+0x7b/0x1b0 kernel/sched/core.c:3239 Code: 00 00 fc ff df 48 89 da 83 e3 07 48 c1 ea 03 83 c3 03 65 44 01 25 75 39 b4 7e 0f b6 04 02 38 c3 7c 08 84 c0 0f 85 fe 00 00 00 <8b> 15 6f 25 0d 09 85 d2 75 15 65 8b 05 54 39 b4 7e 0f b6 c0 3d f4 RSP: 0018:ffff88805a9bf410 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000004 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 1ffffffff14b5b34 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffff88805a9bf420 R08: 1ffff11015d05bc7 R09: ffffed1015d05bc8 R10: ffffed1015d05bc7 R11: ffff8880ae82de3b R12: 0000000000000001 R13: 0000000000000000 R14: ffff888097374700 R15: ffff88812c3f0ac0 is_module_text_address+0x13/0x4a kernel/module.c:4377 kernel_text_address+0x67/0xf0 kernel/extable.c:146 __kernel_text_address+0xd/0x40 kernel/extable.c:107 unwind_get_return_address arch/x86/kernel/unwind_frame.c:18 [inline] unwind_get_return_address+0x61/0xa0 arch/x86/kernel/unwind_frame.c:13 __save_stack_trace+0x8a/0xf0 arch/x86/kernel/stacktrace.c:45 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack+0x45/0xd0 mm/kasan/common.c:75 set_track mm/kasan/common.c:87 [inline] __kasan_kmalloc mm/kasan/common.c:497 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:470 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:505 slab_post_alloc_hook mm/slab.h:436 [inline] slab_alloc mm/slab.c:3392 [inline] __do_kmalloc mm/slab.c:3724 [inline] __kmalloc+0x145/0x740 mm/slab.c:3735 kmalloc include/linux/slab.h:550 [inline] sock_kmalloc net/core/sock.c:2121 [inline] sock_kmalloc+0xc6/0x120 net/core/sock.c:2112 af_alg_alloc_areq+0x24/0x1e0 crypto/af_alg.c:1089 _aead_recvmsg crypto/algif_aead.c:157 [inline] aead_recvmsg+0x45d/0x1ab0 crypto/algif_aead.c:334 sock_recvmsg_nosec net/socket.c:817 [inline] sock_recvmsg net/socket.c:824 [inline] sock_recvmsg+0xd0/0x110 net/socket.c:820 ___sys_recvmsg+0x273/0x5a0 net/socket.c:2299 do_recvmmsg+0x27e/0x7a0 net/socket.c:2412 __sys_recvmmsg+0xe5/0x270 net/socket.c:2493 __do_sys_recvmmsg net/socket.c:2514 [inline] __se_sys_recvmmsg net/socket.c:2507 [inline] __x64_sys_recvmmsg+0xe6/0x140 net/socket.c:2507 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457f29 Code: ad b8 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 b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f88844b8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457f29 RDX: 0000000000000030 RSI: 0000000020007e00 RDI: 0000000000000008 RBP: 000000000073bf00 R08: 0000000020008000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f88844b96d4 R13: 00000000004c4c3e R14: 00000000004d8748 R15: 00000000ffffffff