netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 0, t=10502 jiffies, g=261609, q=185) rcu: All QSes seen, last rcu_preempt kthread activity 10491 (4295092659-4295082168), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.2 R running task 28320 2010 6737 0x00000008 Call Trace: sched_show_task.cold+0x332/0x396 kernel/sched/core.c:5341 print_other_cpu_stall kernel/rcu/tree.c:1430 [inline] check_cpu_stall kernel/rcu/tree.c:1557 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0xb37/0xe19 kernel/rcu/tree.c:2682 update_process_times+0x2a/0x70 kernel/time/timer.c:1649 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:unwind_next_frame+0xfcc/0x1c60 arch/x86/kernel/unwind_orc.c:552 Code: c6 84 d2 0f 95 c2 40 84 d6 0f 85 de 08 00 00 41 83 e1 07 44 38 c8 0f 9e c2 84 c0 0f 95 c0 84 c2 0f 85 c7 08 00 00 0f b6 41 04 e8 04 3c 01 0f 84 19 01 00 00 3c 04 0f 84 93 01 00 00 84 c0 0f RSP: 0018:ffff8880ae6077c0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000005 RBX: 1ffff11015cc0f00 RCX: ffffffff8a64fbe8 RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff8880ae607900 RBP: 0000000000000001 R08: ffffffff8a64fbec R09: 0000000000000005 R10: 0000000000066061 R11: 0000000000000001 R12: ffff888213b37f28 R13: ffff8880ae6078dd R14: ffff8880ae6078e0 R15: ffff8880ae6078a8 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 kmem_cache_alloc_node+0x146/0x3b0 mm/slab.c:3649 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] mrp_pdu_init net/802/mrp.c:303 [inline] mrp_pdu_append_vecattr_event+0x7d2/0x1050 net/802/mrp.c:402 mrp_attr_event+0x15d/0x220 net/802/mrp.c:497 mrp_mad_event net/802/mrp.c:577 [inline] mrp_join_timer+0x5a/0xc0 net/802/mrp.c:594 call_timer_fn+0x177/0x700 kernel/time/timer.c:1337 expire_timers+0x243/0x4e0 kernel/time/timer.c:1374 __run_timers kernel/time/timer.c:1695 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1708 __do_softirq+0x26c/0x9a0 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:544 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:flex_array_get lib/flex_array.c:329 [inline] RIP: 0010:flex_array_get_ptr+0x18c/0x280 lib/flex_array.c:349 Code: b8 00 00 00 00 00 fc ff df 41 d3 ed 4d 63 e5 4a 8d 7c e3 18 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 be 00 00 00 4e 8b 64 e3 18 <4d> 85 e4 74 57 e8 4a 5c 0c fe 48 8d 7b 08 48 b8 00 00 00 00 00 fc RSP: 0018:ffff888213b37a40 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff888098dd8080 RCX: 0000000000000008 RDX: 1ffff110131bb041 RSI: 0000000000000001 RDI: ffff888098dd8208 RBP: 0000000000005cc2 R08: 0000000000000001 R09: 0000000000000fe8 R10: 0000000000000005 R11: 0000000000000000 R12: ffff888098e36c40 R13: 000000000000002e R14: 0000000000000008 R15: ffff888213b37b70 avtab_search+0x1d3/0x520 security/selinux/ss/avtab.c:193 security_compute_sid.part.0+0x62b/0x13e0 security/selinux/ss/services.c:1745 security_compute_sid security/selinux/ss/services.c:1825 [inline] security_transition_sid+0x122/0x190 security/selinux/ss/services.c:1825 socket_sockcreate_sid security/selinux/hooks.c:4561 [inline] socket_sockcreate_sid security/selinux/hooks.c:4553 [inline] selinux_socket_post_create+0x5fd/0x7a0 security/selinux/hooks.c:4614 security_socket_post_create+0x64/0xc0 security/security.c:1381 __sock_create+0x5b5/0x740 net/socket.c:1292 sock_create net/socket.c:1316 [inline] __sys_socketpair+0x242/0x570 net/socket.c:1408 __do_sys_socketpair net/socket.c:1457 [inline] __se_sys_socketpair net/socket.c:1454 [inline] __x64_sys_socketpair+0x93/0xf0 net/socket.c:1454 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45cc79 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:00007feb980dbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 0000000000032b40 RCX: 000000000045cc79 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 000000000078bf48 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 000000000078bf0c R13: 00007ffceefb866f R14: 00007feb980dc9c0 R15: 000000000078bf0c rcu: rcu_preempt kthread starved for 10555 jiffies! g261609 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29208 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x4cf/0xfe0 kernel/time/timer.c:1817 rcu_gp_kthread+0xdad/0x21c0 kernel/rcu/tree.c:2202 kthread+0x30b/0x410 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415