rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8378/1:b..l rcu: (detected by 0, t=10503 jiffies, g=20605, q=601020 ncpus=2) task:syz.1.690 state:R running task stack:25432 pid:8378 tgid:8376 ppid:5848 task_flags:0x400140 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6961 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7288 irqentry_exit+0x36/0x90 kernel/entry/common.c:197 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:unwind_next_frame+0xdf/0x20a0 arch/x86/kernel/unwind_orc.c:482 Code: c0 48 8d 05 00 00 00 00 50 b9 02 00 00 00 31 f6 48 c7 c7 20 12 5c 8e e8 5f e1 2c 00 e8 da cb 28 0a 5a 85 c0 0f 85 57 09 00 00 <48> b8 00 00 00 00 00 fc ff df 4d 8d 65 50 4c 89 e2 48 c1 ea 03 80 RSP: 0018:ffffc9001db76970 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 00000000d975e16d RDX: 0000000000000000 RSI: ffffffff8c162880 RDI: ffffffff8df5ee68 RBP: ffffc9001db76a28 R08: 099b1bd0f8fa68af R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000000 R12: ffffffff81a6db80 R13: ffffc9001db769e0 R14: 0000000000000000 R15: ffff88802c40c880 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 save_stack+0x160/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x84/0x1a0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895 discard_slab mm/slub.c:2753 [inline] __put_partials+0x165/0x1c0 mm/slub.c:3218 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:340 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4180 [inline] slab_alloc_node mm/slub.c:4229 [inline] __do_kmalloc_node mm/slub.c:4364 [inline] __kmalloc_node_track_caller_noprof+0x1d3/0x510 mm/slub.c:4384 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:600 __alloc_skb+0x166/0x380 net/core/skbuff.c:669 alloc_skb include/linux/skbuff.h:1336 [inline] nlmsg_new include/net/netlink.h:1055 [inline] rtmsg_ifinfo_build_skb+0x81/0x280 net/core/rtnetlink.c:4392 rtmsg_ifinfo_event net/core/rtnetlink.c:4434 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:4424 [inline] rtmsg_ifinfo+0x9f/0x1a0 net/core/rtnetlink.c:4443 netif_state_change+0x17f/0x3b0 net/core/dev.c:1585 do_setlink.constprop.0+0x3939/0x4380 net/core/rtnetlink.c:3390 rtnl_group_changelink net/core/rtnetlink.c:3775 [inline] __rtnl_newlink net/core/rtnetlink.c:3929 [inline] rtnl_newlink+0x18e0/0x2000 net/core/rtnetlink.c:4057 rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6946 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x5a7/0x870 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg net/socket.c:729 [inline] ____sys_sendmsg+0xa95/0xc70 net/socket.c:2614 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2668 __sys_sendmsg+0x16d/0x220 net/socket.c:2700 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4c4e18ebe9 RSP: 002b:00007f4c4ef26038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f4c4e3b6090 RCX: 00007f4c4e18ebe9 RDX: 0000000000000000 RSI: 0000200000000140 RDI: 0000000000000009 RBP: 00007f4c4e211e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4c4e3b6128 R14: 00007f4c4e3b6090 R15: 00007fff9b96dab8