rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P15920/1:b..l rcu: (detected by 0, t=10502 jiffies, g=97441, q=502 ncpus=2) task:syz-executor state:R running task stack:21280 pid:15920 tgid:15920 ppid:15902 task_flags:0x400140 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5378 [inline] __schedule+0x190e/0x4c90 kernel/sched/core.c:6765 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7087 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__kernel_text_address+0x2e/0x40 kernel/extable.c:79 Code: 53 48 89 fb e8 43 00 00 00 85 c0 0f 95 c0 48 c7 c1 00 e0 9d 91 48 39 cb 0f 93 c1 48 c7 c2 6f 3a b9 91 48 39 d3 0f 92 c2 20 ca <08> c2 0f b6 c2 5b c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 RSP: 0018:ffffc9000414e670 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffffffff81ad4a18 RCX: ffffffff919de000 RDX: ffffffff91b93a00 RSI: ffffc90004148000 RDI: ffffffff81ad4a18 RBP: ffffc9000414e730 R08: ffffc9000414e730 R09: 0000000000000000 R10: ffffc9000414e6f0 R11: fffff52000829ce0 R12: ffff88802406bc00 R13: ffffffff81ad4ae0 R14: dffffc0000000000 R15: 1ffff92000829cdd unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xfd/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 save_stack+0xfb/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x76/0x430 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660 discard_slab mm/slub.c:2684 [inline] __put_partials+0x160/0x1c0 mm/slub.c:3153 put_cpu_partial+0x17c/0x250 mm/slub.c:3228 __slab_free+0x290/0x380 mm/slub.c:4479 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] __do_kmalloc_node mm/slub.c:4293 [inline] __kmalloc_node_noprof+0x23c/0x4d0 mm/slub.c:4300 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:662 netif_alloc_netdev_queues net/core/dev.c:10740 [inline] alloc_netdev_mqs+0x92d/0x1210 net/core/dev.c:11612 rtnl_create_link+0x2f9/0xc90 net/core/rtnetlink.c:3605 veth_newlink+0x19f/0xb00 drivers/net/veth.c:1802 rtnl_newlink_create+0x2ee/0xa40 net/core/rtnetlink.c:3796 __rtnl_newlink net/core/rtnetlink.c:3907 [inline] rtnl_newlink+0x17cc/0x1d30 net/core/rtnetlink.c:4022 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6912 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2533 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1882 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:733 __sys_sendto+0x363/0x4c0 net/socket.c:2187 __do_sys_sendto net/socket.c:2194 [inline] __se_sys_sendto net/socket.c:2190 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2190 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff6a178effc RSP: 002b:00007ff6a1acf650 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007ff6a24d4620 RCX: 00007ff6a178effc RDX: 0000000000000068 RSI: 00007ff6a24d4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ff6a1acf6a4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007ff6a24d4670 R15: 0000000000000000