syzbot

watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor116:4054]
Modules linked in:
irq event stamp: 5259
hardirqs last  enabled at (5258): [<ffff800011947a48>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (5258): [<ffff800011947a48>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (5259): [<ffff800011947c90>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (510): [<ffff80000fd894b4>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (514): [<ffff800010094f44>] fq_pie_change+0x248/0xda8 net/sched/sch_fq_pie.c:293
CPU: 0 PID: 4054 Comm: syz-executor116 Not tainted 5.15.114-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : queued_spin_lock_slowpath+0x160/0x938 kernel/locking/qspinlock.c:382
lr : queued_spin_lock_slowpath+0x16c/0x938 kernel/locking/qspinlock.c:382
sp : ffff80001cd76aa0
x29: ffff80001cd76b40 x28: 1ffff000039aed60 x27: 1fffe0001967b41f
x26: dfff800000000000 x25: ffff7000039aed58 x24: ffff80001cd76ac0
x23: 1fffe0001967b41e x22: ffff80001cd76b00 x21: 0000000000000001
x20: 0000000000000001 x19: ffff0000cb3da0f0 x18: 0000000000000000
x17: ff8080000aae0f20 x16: ffff80000830309c x15: ffff80000aae0f20
x14: 1ffff0000291a06a x13: ffffffffffffffff x12: 0000000000000001
x11: 1fffe0001967b41e x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000101 x7 : ffff800010094f44 x6 : 0000000000000000
x5 : 0000000000000000
 x4 : 0000000000000001 x3 : ffff8000083023a8
x2 : 0000000000000000
 x1 : 0000000000000004
 x0 : 0000000000000001

Call trace:
 __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:252 [inline]
 __cmpwait arch/arm64/include/asm/cmpxchg.h:278 [inline]
 queued_spin_lock_slowpath+0x160/0x938 kernel/locking/qspinlock.c:382
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock+0x334/0x35c kernel/locking/spinlock_debug.c:115
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0x12c/0x1c4 kernel/locking/spinlock.c:178
 fq_pie_change+0x248/0xda8 net/sched/sch_fq_pie.c:293
 fq_pie_init+0x2b0/0x714 net/sched/sch_fq_pie.c:414
 qdisc_create+0x61c/0x1300 net/sched/sch_api.c:1259
 tc_modify_qdisc+0x8dc/0x126c
 rtnetlink_rcv_msg+0xa74/0xdac net/core/rtnetlink.c:5587
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2504
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:5605
 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:1923
 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