rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P9394/1:b..l rcu: (detected by 0, t=10503 jiffies, g=62925, q=881191 ncpus=2) task:syz.6.1064 state:R running task stack:23408 pid:9394 tgid:9372 ppid:8860 task_flags:0x400140 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:lock_release+0x5/0x3c0 kernel/locking/lockdep.c:5876 Code: e9 4f fe ff ff 41 bf 2f 00 00 00 e9 06 ff ff ff 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 30 49 89 f5 49 89 fe 65 48 8b RSP: 0018:ffffc9000202e1f0 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffc9000202e2b8 RCX: 0000000080000001 RDX: ffffc9000202e201 RSI: ffffffff8176f27f RDI: ffffffff8eb59c60 RBP: 1ffffffff22ef301 R08: ffffc9000202e748 R09: 0000000000000000 R10: ffffc9000202e2f8 R11: fffff52000405c61 R12: ffffc90002028000 R13: ffffffff8176f27f R14: ffffc9000202e2a8 R15: ffffc9000202e758 rcu_lock_release include/linux/rcupdate.h:310 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1183 [inline] unwind_next_frame+0x1baa/0x2550 arch/x86/kernel/unwind_orc.c:709 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2705 [inline] slab_free mm/slub.c:6405 [inline] kfree+0x1c5/0x640 mm/slub.c:6720 skb_kfree_head net/core/skbuff.c:1077 [inline] skb_free_head net/core/skbuff.c:1089 [inline] skb_release_data+0x85e/0xab0 net/core/skbuff.c:1116 skb_release_all net/core/skbuff.c:1191 [inline] __kfree_skb+0x5d/0x210 net/core/skbuff.c:1205 netlink_broadcast_filtered+0xd9d/0xea0 net/netlink/af_netlink.c:1541 netlink_broadcast+0x37/0x50 net/netlink/af_netlink.c:1563 uevent_net_broadcast_tagged lib/kobject_uevent.c:373 [inline] kobject_uevent_net_broadcast+0x4bc/0x560 lib/kobject_uevent.c:415 kobject_uevent_env+0x566/0x9e0 lib/kobject_uevent.c:611 __kobject_del+0xd1/0x310 lib/kobject.c:601 kobject_cleanup lib/kobject.c:680 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x23a/0x550 lib/kobject.c:737 netdev_queue_update_kobjects+0x5c9/0x6b0 net/core/net-sysfs.c:2052 remove_queue_kobjects net/core/net-sysfs.c:2149 [inline] netdev_unregister_kobject+0x10b/0x450 net/core/net-sysfs.c:2304 unregister_netdevice_many_notify+0x1be4/0x2150 net/core/dev.c:12473 unregister_netdevice_many net/core/dev.c:12501 [inline] unregister_netdevice_queue+0x2f5/0x340 net/core/dev.c:12313 unregister_netdevice include/linux/netdevice.h:3472 [inline] macsec_newlink+0xf3d/0x1200 drivers/net/macsec.c:4289 rtnl_newlink_create+0x310/0xb00 net/core/rtnetlink.c:3913 __rtnl_newlink net/core/rtnetlink.c:4044 [inline] rtnl_newlink+0x167f/0x1bd0 net/core/rtnetlink.c:4159 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7076 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7bb/0x940 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:775 __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0x54e/0x850 net/socket.c:2684 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2738 __sys_sendmsg net/socket.c:2770 [inline] __do_sys_sendmsg net/socket.c:2775 [inline] __se_sys_sendmsg net/socket.c:2773 [inline] __x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2773 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f83f8d9de59 RSP: 002b:00007f83f9ce4028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f83f9026180 RCX: 00007f83f8d9de59 RDX: 0000000004008800 RSI: 0000200000000080 RDI: 0000000000000007 RBP: 00007f83f8e33e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f83f9026218 R14: 00007f83f9026180 R15: 00007f83f914fa48