====================================== | [ 111.159656][ T813] RCU nest depth: 0, expected: 0 | [ 111.159841][ T813] 2 locks held by tc/813: | [ 111.159990][ T813] #0: ffffffffa3fe7e88 (rtnl_mutex){+.+.}-{4:4}, at: tc_new_tfilter (net/sched/cls_api.c:2261) | [ 111.160325][ T813] #1: ffff888004f13e90 (&tp->lock){+.+.}-{3:3}, at: tc_new_tfilter (net/sched/cls_api.c:2383) [ 111.160876][ T813] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 111.161083][ T813] Call Trace: [ 111.161219][ T813] [ 111.161318][ T813] dump_stack_lvl (lib/dump_stack.c:123) [ 111.161503][ T813] __might_resched (kernel/sched/core.c:8759) [ 111.161683][ T813] ? tc_new_tfilter (net/sched/cls_api.c:2383) [ 111.161865][ T813] cpus_read_lock (./include/linux/kernel.h:73 ./include/linux/percpu-rwsem.h:49 kernel/cpu.c:490) [ 111.162040][ T813] static_key_slow_inc (kernel/jump_label.c:191) [ 111.162215][ T813] tc_new_tfilter (net/sched/cls_api.c:2385) [ 111.162401][ T813] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 111.162535][ T813] ? __pfx_tc_new_tfilter (net/sched/cls_api.c:2186) [ 111.162727][ T813] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 111.162896][ T813] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6912) [ 111.163061][ T813] ? __pfx_tc_new_tfilter (net/sched/cls_api.c:2186) [ 111.163223][ T813] rtnetlink_rcv_msg (net/core/rtnetlink.c:6914) [ 111.163387][ T813] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6817) [ 111.163717][ T813] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 111.163877][ T813] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 111.164006][ T813] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 111.164174][ T813] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 111.164340][ T813] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6817) [ 111.164504][ T813] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 111.164681][ T813] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 111.164843][ T813] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) [ 111.165009][ T813] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 111.165176][ T813] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 111.165337][ T813] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 111.165506][ T813] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 111.165672][ T813] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 111.165846][ T813] ____sys_sendmsg (net/socket.c:713 net/socket.c:728 net/socket.c:2568) [ 111.166008][ T813] ? __pfx_____sys_sendmsg (net/socket.c:2514) [ 111.166172][ T813] ? __pfx_copy_msghdr_from_user (net/socket.c:2494) [ 111.166390][ T813] ___sys_sendmsg (net/socket.c:2624) [ 111.166552][ T813] ? __pfx____sys_sendmsg (net/socket.c:2611) [ 111.166722][ T813] ? ___sys_recvmsg (net/socket.c:2820) [ 111.166884][ T813] ? __pfx____sys_recvmsg (net/socket.c:2820) [ 111.167063][ T813] ? do_user_addr_fault (./include/linux/rcupdate.h:337 ./include/linux/rcupdate.h:849 ./include/linux/mm.h:740 arch/x86/mm/fault.c:1340) [ 111.167226][ T813] ? do_user_addr_fault (./include/linux/rcupdate.h:337 ./include/linux/rcupdate.h:849 ./include/linux/mm.h:740 arch/x86/mm/fault.c:1340) [ 111.167393][ T813] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 111.167556][ T813] ? __lock_release (kernel/locking/lockdep.c:5525) [ 111.167720][ T813] __sys_sendmsg (net/socket.c:2654) [ 111.167881][ T813] ? __pfx___sys_sendmsg (net/socket.c:2639) [ 111.168054][ T813] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1340) [ 111.168225][ T813] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 111.168388][ T813] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 111.168584][ T813] RIP: 0033:0x7f90ecb839a7 [ 111.168756][ T813] Code: Unable to access opcode bytes at 0x7f90ecb8397d. Code starting with the faulting instruction =========================================== [ 111.168962][ T813] RSP: 002b:00007ffc792d1528 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 111.169210][ T813] RAX: ffffffffffffffda RBX: 000000000047e780 RCX: 00007f90ecb839a7 [ 111.169452][ T813] RDX: 0000000000000000 RSI: 00007ffc792d1590 RDI: 0000000000000005 [ 111.169693][ T813] RBP: 0000000000000300 R08: 0000000000000000 R09: 0000000000000000 [ 111.169932][ T813] R10: 00007f90eca3c708 R11: 0000000000000246 R12: 00007ffc792d6965 [ 111.170176][ T813] R13: 0000000067858903 R14: 0000000000483b60 R15: 00007ffc792d6969 | [ 111.172404][ T813] #1: ffff888004f13e90 (&tp->lock){+.+.}-{3:3}, at: tc_new_tfilter (net/sched/cls_api.c:2383) | [ 111.172661][ T813] #2: ffffffffa35ddcd0 (cpu_hotplug_lock){++++}-{0:0}, at: static_key_slow_inc (kernel/jump_label.c:191) | [ 111.172916][ T813] stack backtrace: | [ 111.173280][ T813] Tainted: [W]=WARN [ 111.173390][ T813] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 111.173569][ T813] Call Trace: [ 111.173680][ T813] [ 111.173756][ T813] dump_stack_lvl (lib/dump_stack.c:123) [ 111.173905][ T813] __lock_acquire (kernel/locking/lockdep.c:4828 kernel/locking/lockdep.c:4898 kernel/locking/lockdep.c:5176) [ 111.174053][ T813] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 111.174199][ T813] ? static_key_slow_inc_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1195 kernel/jump_label.c:167 kernel/jump_label.c:151) [ 111.174385][ T813] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 111.174531][ T813] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 111.174678][ T813] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 111.174823][ T813] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 111.174966][ T813] ? static_key_slow_inc_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1195 kernel/jump_label.c:167 kernel/jump_label.c:151) [ 111.175149][ T813] __mutex_lock (kernel/locking/mutex.c:587 kernel/locking/mutex.c:735) [ 111.175293][ T813] ? static_key_slow_inc_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1195 kernel/jump_label.c:167 kernel/jump_label.c:151) [ 111.175482][ T813] ? static_key_slow_inc_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1195 kernel/jump_label.c:167 kernel/jump_label.c:151) [ 111.175661][ T813] ? __pfx___mutex_lock (kernel/locking/mutex.c:734) [ 111.175808][ T813] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 111.175954][ T813] ? static_key_fast_inc_not_disabled (./arch/x86/include/asm/atomic.h:23 (discriminator 3) ./include/linux/atomic/atomic-arch-fallback.h:457 (discriminator 3) ./include/linux/atomic/atomic-instrumented.h:33 (discriminator 3) kernel/jump_label.c:141 (discriminator 3)) [ 111.176135][ T813] ? __pfx_static_key_fast_inc_not_disabled (kernel/jump_label.c:128) [ 111.176309][ T813] ? static_key_slow_inc_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1195 kernel/jump_label.c:167 kernel/jump_label.c:151) [ 111.176492][ T813] static_key_slow_inc_cpuslocked (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:1195 kernel/jump_label.c:167 kernel/jump_label.c:151) [ 111.176659][ T813] static_key_slow_inc (kernel/jump_label.c:191) [ 111.176788][ T813] tc_new_tfilter (net/sched/cls_api.c:2385) [ 111.176921][ T813] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 111.177022][ T813] ? __pfx_tc_new_tfilter (net/sched/cls_api.c:2186) [ 111.177182][ T813] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 111.177315][ T813] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6912) [ 111.177451][ T813] ? __pfx_tc_new_tfilter (net/sched/cls_api.c:2186) [ 111.177618][ T813] rtnetlink_rcv_msg (net/core/rtnetlink.c:6914) [ 111.177751][ T813] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6817) [ 111.177881][ T813] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 111.178012][ T813] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 111.178147][ T813] ? __lock_acquire (kernel/locking/lockdep.c:5226) [ 111.178284][ T813] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 111.178414][ T813] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6817) [ 111.178547][ T813] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 111.178684][ T813] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 111.178817][ T813] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) [ 111.178949][ T813] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 111.179080][ T813] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 111.179211][ T813] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 111.179343][ T813] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 111.179478][ T813] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 111.179612][ T813] ____sys_sendmsg (net/socket.c:713 net/socket.c:728 net/socket.c:2568) [ 111.179745][ T813] ? __pfx_____sys_sendmsg (net/socket.c:2514) [ 111.179875][ T813] ? __pfx_copy_msghdr_from_user (net/socket.c:2494) [ 111.180041][ T813] ___sys_sendmsg (net/socket.c:2624) [ 111.180173][ T813] ? __pfx____sys_sendmsg (net/socket.c:2611) [ 111.180307][ T813] ? ___sys_recvmsg (net/socket.c:2820) [ 111.180440][ T813] ? __pfx____sys_recvmsg (net/socket.c:2820) [ 111.180571][ T813] ? do_user_addr_fault (./include/linux/rcupdate.h:337 ./include/linux/rcupdate.h:849 ./include/linux/mm.h:740 arch/x86/mm/fault.c:1340) [ 111.180703][ T813] ? do_user_addr_fault (./include/linux/rcupdate.h:337 ./include/linux/rcupdate.h:849 ./include/linux/mm.h:740 arch/x86/mm/fault.c:1340) [ 111.180835][ T813] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 111.180967][ T813] ? __lock_release (kernel/locking/lockdep.c:5525) [ 111.181098][ T813] __sys_sendmsg (net/socket.c:2654) [ 111.181229][ T813] ? __pfx___sys_sendmsg (net/socket.c:2639) [ 111.181368][ T813] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1340) [ 111.181500][ T813] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 111.181632][ T813] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 111.181795][ T813] RIP: 0033:0x7f90ecb839a7 [ 111.181933][ T813] Code: Unable to access opcode bytes at 0x7f90ecb8397d. Code starting with the faulting instruction =========================================== [ 111.182102][ T813] RSP: 002b:00007ffc792d1528 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 111.182302][ T813] RAX: ffffffffffffffda RBX: 000000000047e780 RCX: 00007f90ecb839a7 [ 111.182499][ T813] RDX: 0000000000000000 RSI: 00007ffc792d1590 RDI: 0000000000000005 [ 111.182694][ T813] RBP: 0000000000000300 R08: 0000000000000000 R09: 0000000000000000 [ 111.182889][ T813] R10: 00007f90eca3c708 R11: 0000000000000246 R12: 00007ffc792d6965 [ 111.183089][ T813] R13: 0000000067858903 R14: 0000000000483b60 R15: 00007ffc792d6969 | [ 130.105847][ T916] preempt_count: 1, expected: 0 | [ 130.106007][ T916] RCU nest depth: 0, expected: 0 | [ 130.106149][ T916] INFO: lockdep is turned off. | [ 130.106581][ T916] Tainted: [W]=WARN [ 130.106693][ T916] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 130.106885][ T916] Call Trace: [ 130.107011][ T916] [ 130.107090][ T916] dump_stack_lvl (lib/dump_stack.c:123) [ 130.107259][ T916] __might_resched (kernel/sched/core.c:8759) [ 130.107410][ T916] ? tc_new_tfilter (net/sched/cls_api.c:2383) [ 130.107571][ T916] cpus_read_lock (./include/linux/kernel.h:73 ./include/linux/percpu-rwsem.h:49 kernel/cpu.c:490) [ 130.107722][ T916] static_key_slow_inc (kernel/jump_label.c:191) [ 130.107871][ T916] tc_new_tfilter (net/sched/cls_api.c:2385) [ 130.108037][ T916] ? __pfx_tc_new_tfilter (net/sched/cls_api.c:2186) [ 130.108193][ T916] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:406 arch/x86/kernel/unwind_orc.c:648) [ 130.108389][ T916] ? get_reg (arch/x86/kernel/unwind_orc.c:456 (discriminator 2)) [ 130.108504][ T916] ? lock_release (kernel/locking/lockdep.c:116 kernel/locking/lockdep.c:5862) [ 130.108655][ T916] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 130.108800][ T916] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) [ 130.108947][ T916] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 37)) [ 130.109101][ T916] ? __pfx_tc_new_tfilter (net/sched/cls_api.c:2186) [ 130.109258][ T916] rtnetlink_rcv_msg (net/core/rtnetlink.c:6914) [ 130.109405][ T916] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6817) [ 130.109551][ T916] ? find_stack (lib/stackdepot.c:552) [ 130.109698][ T916] ? stack_depot_save_flags (lib/stackdepot.c:618) [ 130.109847][ T916] netlink_rcv_skb (net/netlink/af_netlink.c:2543) [ 130.109995][ T916] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6817) [ 130.110145][ T916] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520) [ 130.110300][ T916] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 37)) [ 130.110450][ T916] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) [ 130.110599][ T916] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) [ 130.110744][ T916] ? lock_release (kernel/locking/lockdep.c:116 kernel/locking/lockdep.c:5862) [ 130.110891][ T916] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) [ 130.111042][ T916] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348) [ 130.111190][ T916] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333) [ 130.111335][ T916] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) [ 130.111523][ T916] netlink_sendmsg (net/netlink/af_netlink.c:1892) [ 130.111670][ T916] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811) [ 130.111815][ T916] ? __might_fault (mm/memory.c:6751 mm/memory.c:6744) [ 130.111961][ T916] ? lock_release (kernel/locking/lockdep.c:116 kernel/locking/lockdep.c:5862) [ 130.112107][ T916] ____sys_sendmsg (net/socket.c:713 net/socket.c:728 net/socket.c:2568) [ 130.112268][ T916] ? __pfx_____sys_sendmsg (net/socket.c:2514) [ 130.112413][ T916] ? __pfx_copy_msghdr_from_user (net/socket.c:2494) [ 130.112602][ T916] ___sys_sendmsg (net/socket.c:2624) [ 130.112749][ T916] ? __pfx____sys_sendmsg (net/socket.c:2611) [ 130.112896][ T916] ? ___sys_recvmsg (net/socket.c:2820) [ 130.113042][ T916] ? __pfx____sys_recvmsg (net/socket.c:2820) [ 130.113190][ T916] ? __handle_mm_fault (mm/memory.c:5944) [ 130.113344][ T916] ? __pfx___handle_mm_fault (mm/memory.c:5853) [ 130.113498][ T916] ? __pfx_lock_vma_under_rcu (mm/memory.c:6268) [ 130.113645][ T916] __sys_sendmsg (net/socket.c:2654) [ 130.113797][ T916] ? __pfx___sys_sendmsg (net/socket.c:2639) [ 130.113946][ T916] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1340) [ 130.114094][ T916] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) [ 130.114291][ T916] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 130.114440][ T916] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 130.114637][ T916] RIP: 0033:0x7fdc47bad9a7 [ 130.114802][ T916] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 All code ======== 0: 0a 00 or (%rax),%al 2: f7 d8 neg %eax 4: 64 89 02 mov %eax,%fs:(%rdx) 7: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax e: eb b9 jmp 0xffffffffffffffc9 10: 0f 1f 00 nopl (%rax) 13: f3 0f 1e fa endbr64 17: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax 1e: 00 1f: 85 c0 test %eax,%eax 21: 75 10 jne 0x33 23: b8 2e 00 00 00 mov $0x2e,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 51 ja 0x83 32: c3 ret 33: 48 83 ec 28 sub $0x28,%rsp 37: 89 54 24 1c mov %edx,0x1c(%rsp) 3b: 48 89 74 24 10 mov %rsi,0x10(%rsp) Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 51 ja 0x59 8: c3 ret 9: 48 83 ec 28 sub $0x28,%rsp d: 89 54 24 1c mov %edx,0x1c(%rsp) 11: 48 89 74 24 10 mov %rsi,0x10(%rsp) [ 130.115333][ T916] RSP: 002b:00007ffdb866bc58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 130.115562][ T916] RAX: ffffffffffffffda RBX: 000000000047e780 RCX: 00007fdc47bad9a7 [ 130.115781][ T916] RDX: 0000000000000000 RSI: 00007ffdb866bcc0 RDI: 0000000000000005 [ 130.115998][ T916] RBP: 0000000000000300 R08: 0000000000000000 R09: 0000000000000000 [ 130.116227][ T916] R10: 00007fdc47a66708 R11: 0000000000000246 R12: 00007ffdb8671965 Finger prints: __lock_acquire:__mutex_lock:static_key_slow_inc_cpuslocked:static_key_slow_inc:tc_new_tfilter __might_resched:cpus_read_lock:static_key_slow_inc:tc_new_tfilter:rtnetlink_rcv_msg