watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [kworker/u4:5:50] Modules linked in: irq event stamp: 42363 hardirqs last enabled at (42362): [] __trace_hardirqs_on+0x18/0x20 arch/riscv/kernel/trace_irq.c:19 hardirqs last disabled at (42363): [] __trace_hardirqs_off+0x18/0x20 arch/riscv/kernel/trace_irq.c:25 softirqs last enabled at (37768): [] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (37768): [] __do_softirq+0x618/0x8fc kernel/softirq.c:600 softirqs last disabled at (37809): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (37809): [] invoke_softirq kernel/softirq.c:452 [inline] softirqs last disabled at (37809): [] __irq_exit_rcu+0x142/0x1f8 kernel/softirq.c:650 CPU: 0 PID: 50 Comm: kworker/u4:5 Tainted: G W 5.19.0-rc1-syzkaller-00001-g88bd24d73d5b #0 Hardware name: riscv-virtio,qemu (DT) Workqueue: events_unbound toggle_allocation_gate epc : arch_static_branch arch/riscv/include/asm/jump_label.h:20 [inline] epc : kfence_alloc include/linux/kfence.h:120 [inline] epc : slab_alloc_node mm/slub.c:3132 [inline] epc : __kmalloc_node_track_caller+0xae/0x35a mm/slub.c:4950 ra : slab_pre_alloc_hook mm/slab.h:725 [inline] ra : slab_alloc_node mm/slub.c:3128 [inline] ra : __kmalloc_node_track_caller+0x74/0x35a mm/slub.c:4950 epc : ffffffff804a020a ra : ffffffff804a01d0 sp : ff20000000586f00 gp : ffffffff85a89060 tp : ff6000000b5c3180 t0 : ffebffff0282bb86 t1 : 00000000000f0000 t2 : 0000000000000008 s0 : ff20000000586fa0 s1 : ff60000007e01dc0 a0 : 0000000000000000 a1 : 0000000000000007 a2 : 1ffffffff09c97f0 a3 : ffffffff80c30ab8 a4 : 0000000000000000 a5 : 0000000000000000 a6 : ffffffffba097b40 a7 : 0000000000000100 s2 : 0000000000082a20 s3 : 0000000000082a20 s4 : 0000000000000240 s5 : ffffffffffffffff s6 : ffffffff827896b4 s7 : ffffffff85aaf7c0 s8 : 0000000000000000 s9 : ffffffff85a8f160 s10: ff6000007fdef7c0 s11: ff600000122d6bf4 t3 : fffffffff204f202 t4 : ffebffff0244a918 t5 : ffebffff0244a919 t6 : ffffffff8506d7a0 status: 0000000000000120 badaddr: 0000000000000000 cause: 8000000000000005 [] kmalloc_reserve net/core/skbuff.c:354 [inline] [] __alloc_skb+0xee/0x2e4 net/core/skbuff.c:426 [] __napi_alloc_skb+0x72/0x214 net/core/skbuff.c:568 [] napi_alloc_skb include/linux/skbuff.h:3314 [inline] [] page_to_skb+0x172/0x71a drivers/net/virtio_net.c:464 [] receive_mergeable drivers/net/virtio_net.c:1084 [inline] [] receive_buf+0xacc/0x404a drivers/net/virtio_net.c:1223 [] virtnet_receive drivers/net/virtio_net.c:1518 [inline] [] virtnet_poll+0x39c/0x986 drivers/net/virtio_net.c:1627 [] __napi_poll+0x7e/0x634 net/core/dev.c:6486 [] napi_poll net/core/dev.c:6553 [inline] [] net_rx_action+0x714/0x860 net/core/dev.c:6664 [] __do_softirq+0x274/0x8fc kernel/softirq.c:571 [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] [] invoke_softirq kernel/softirq.c:452 [inline] [] __irq_exit_rcu+0x142/0x1f8 kernel/softirq.c:650 [] irq_exit+0x10/0x7a kernel/softirq.c:674 [] generic_handle_arch_irq+0x48/0x54 kernel/irq/handle.c:240 [] ret_from_exception+0x0/0x10 [] copy_to_kernel_nofault+0x1f8/0x2a8 mm/maccess.c:70