INFO: rcu detected stall in netlink

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: rcu detected stall in netlink_sendmsg (2)	1	C	done		11	2503d	2509d	13/29	fixed on 2019/10/09 10:54
upstream	INFO: rcu detected stall in netlink_sendmsg (3) net	1	C	done		6	2354d	2407d	15/29	fixed on 2020/02/18 14:31
upstream	INFO: rcu detected stall in netlink_sendmsg netfilter	1	syz			83	2712d	2768d	11/29	fixed on 2019/03/06 07:43
upstream	INFO: rcu detected stall in netlink_sendmsg (5) net	1	syz	error		11	136d	236d	0/29	closed as invalid on 2026/04/30 15:35
upstream	INFO: rcu detected stall in netlink_sendmsg (4) net	1	C	done	error	38	1114d	2304d	0/29	auto-obsoleted due to no activity on 2025/10/27 20:35

IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=7b6/1/0x4000000000000002 softirq=11200/11201 fqs=5250 rcu: (t=10502 jiffies g=5317 q=197) NMI backtrace for cpu 1 CPU: 1 PID: 7658 Comm: syz-executor744 Not tainted 4.19.73 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __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+0x1b0/0x1f8 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+0x189/0x1d5 kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x5e3/0xd90 kernel/rcu/tree.c:2682 update_process_times+0x32/0x80 kernel/time/timer.c:1636 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 </IRQ> RIP: 0010:list_add_tail include/linux/list.h:93 [inline] RIP: 0010:list_move_tail include/linux/list.h:183 [inline] RIP: 0010:hhf_dequeue+0x636/0xa00 net/sched/sch_hhf.c:438 Code: 48 c1 ea 03 42 80 3c 22 00 0f 85 7c 03 00 00 4d 89 3e e8 4d a4 dc fb 4d 8d b5 58 03 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 <0f> 85 4e 03 00 00 4d 8b bd 58 03 00 00 48 89 df 48 8b 55 c8 4c 89 RSP: 0018:ffff8880a098f358 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff11010cfdeb3 RBX: ffff8880867ef4f8 RCX: ffffffff858ebde6 RDX: 0000000000000000 RSI: ffffffff858ebe53 RDI: ffff8880867ef598 RBP: ffff8880a098f3a8 R08: ffff88809de60580 R09: 0000000000000003 R10: ffff88809de60e78 R11: 000000000e8614fd R12: dffffc0000000000 R13: ffff8880867ef240 R14: ffff8880867ef598 R15: ffff8880867ef590 dequeue_skb net/sched/sch_generic.c:277 [inline] qdisc_restart net/sched/sch_generic.c:380 [inline] __qdisc_run+0x1e7/0x1960 net/sched/sch_generic.c:398 __dev_xmit_skb net/core/dev.c:3501 [inline] __dev_queue_xmit+0x165c/0x2fe0 net/core/dev.c:3811 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876 __netlink_deliver_tap_skb net/netlink/af_netlink.c:303 [inline] __netlink_deliver_tap net/netlink/af_netlink.c:321 [inline] netlink_deliver_tap+0x910/0xc20 net/netlink/af_netlink.c:334 __netlink_sendskb+0x68/0xc0 net/netlink/af_netlink.c:1261 netlink_sendskb net/netlink/af_netlink.c:1270 [inline] netlink_unicast+0x616/0x720 net/netlink/af_netlink.c:1358 netlink_ack+0x645/0xb30 net/netlink/af_netlink.c:2424 netlink_rcv_skb+0x382/0x460 net/netlink/af_netlink.c:2460 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4765 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x537/0x720 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 ___sys_sendmsg+0x803/0x920 net/socket.c:2115 __sys_sendmsg+0x105/0x1d0 net/socket.c:2153 __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2160 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441b19 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffe6764dd78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441b19 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 00007ffe6764dd90 R08: 0000000001bbbbbb R09: 0000000001bbbbbb R10: 0000000001bbbbbb R11: 0000000000000246 R12: 0000000000000000 R13: 00000000004030b0 R14: 0000000000000000 R15: 0000000000000000

Crashes (3):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Manager
2019/09/16 22:58	linux-4.19.y	db2d0b7c1dde	51ca0454	.config	console log	report	syz	C	ci2-linux-4-19
2019/09/15 20:18	linux-4.19.y	ee809c7e0895	32d59357	.config	console log	report	syz	C	ci2-linux-4-19
2019/09/11 23:39	linux-4.19.y	ee809c7e0895	f4e53c10	.config	console log	report			ci2-linux-4-19

Crashes (3):

Assets (help?)