watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.5:4388] Modules linked in: irq event stamp: 56669 hardirqs last enabled at (56668): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (56668): [] _raw_spin_unlock_irq+0x9c/0x134 kernel/locking/spinlock.c:202 hardirqs last disabled at (56669): [] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227 softirqs last enabled at (17894): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (17894): [] __do_softirq+0xb5c/0xe20 kernel/softirq.c:587 softirqs last disabled at (18545): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (18545): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (18545): [] __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:636 CPU: 1 PID: 4388 Comm: syz-executor.5 Not tainted 5.15.124-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : preempt_count arch/arm64/include/asm/preempt.h:12 [inline] pc : check_kcov_mode kernel/kcov.c:163 [inline] pc : __sanitizer_cov_trace_pc+0x24/0xa4 kernel/kcov.c:197 lr : pie_calculate_probability+0x498/0x7bc net/sched/sch_pie.c:400 sp : ffff800008017a50 x29: ffff800008017a90 x28: fffffff0a3da8872 x27: fffffff0a3da8872 x26: dfff800000000000 x25: ffff80002763cfa0 x24: 1ffff00004ec79f4 x23: 1fffe00019d8f860 x22: ffff0000cec7c300 x21: 0000000000000000 x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000301 x17: ff8080000fd2cf4c x16: ffff800008303184 x15: ffff80000fd2cf4c x14: 1ffff0000292006a x13: ffffffffffffffff x12: 0000000000000100 x11: ff8080001009aa98 x10: 0000000000000101 x9 : 0000000000000030 x8 : ffff0000cce09b40 x7 : ffff8000100a2a04 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000083032b4 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: preempt_count arch/arm64/include/asm/preempt.h:12 [inline] check_kcov_mode kernel/kcov.c:163 [inline] __sanitizer_cov_trace_pc+0x24/0xa4 kernel/kcov.c:197 fq_pie_timer+0x110/0x248 net/sched/sch_fq_pie.c:389 call_timer_fn+0x19c/0x8f0 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers+0x554/0x718 kernel/time/timer.c:1737 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1750 __do_softirq+0x344/0xe20 kernel/softirq.c:558 do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] invoke_softirq kernel/softirq.c:439 [inline] __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:636 irq_exit+0x14/0x88 kernel/softirq.c:660 handle_domain_irq+0xf4/0x178 kernel/irq/irqdesc.c:710 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:758 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:899 do_interrupt_handler+0x74/0x94 arch/arm64/kernel/entry-common.c:267 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:442 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:458 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:580 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline] free_unref_page+0x160/0x204 mm/page_alloc.c:3417 free_the_page mm/page_alloc.c:705 [inline] __free_pages+0x180/0x1d4 mm/page_alloc.c:5497 __vunmap+0x804/0x988 mm/vmalloc.c:2621 __vfree mm/vmalloc.c:2669 [inline] vfree+0x10c/0x214 mm/vmalloc.c:2700 kvfree+0x30/0x50 mm/util.c:652 fq_pie_destroy+0x78/0xa0 net/sched/sch_fq_pie.c:539 qdisc_destroy+0x12c/0x4c0 net/sched/sch_generic.c:1025 qdisc_put+0x98/0x138 net/sched/sch_generic.c:1044 notify_and_destroy net/sched/sch_api.c:1012 [inline] qdisc_graft+0xe84/0x1198 net/sched/sch_api.c:1089 tc_modify_qdisc+0xc88/0x1344 net/sched/sch_api.c:1700 rtnetlink_rcv_msg+0xa74/0xdac net/core/rtnetlink.c:5599 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2505 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:5617 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline] netlink_unicast+0x664/0x938 net/netlink/af_netlink.c:1356 netlink_sendmsg+0x844/0xb38 net/netlink/af_netlink.c:1924 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0x584/0x870 net/socket.c:2412 ___sys_sendmsg+0x214/0x294 net/socket.c:2466 __sys_sendmsg net/socket.c:2495 [inline] __do_sys_sendmsg net/socket.c:2504 [inline] __se_sys_sendmsg net/socket.c:2502 [inline] __arm64_sys_sendmsg+0x1ac/0x25c net/socket.c:2502 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584