vkms_vblank_simulate: vblank timer overrun watchdog: BUG: soft lockup - CPU#1 stuck for 49s! [syz.3.141:4819] Modules linked in: irq event stamp: 2275 hardirqs last enabled at (2274): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (2274): [] _raw_spin_unlock_irqrestore+0xac/0x158 kernel/locking/spinlock.c:194 hardirqs last disabled at (2275): [] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227 softirqs last enabled at (2228): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31 softirqs last disabled at (2264): [] spin_lock_bh include/linux/spinlock.h:368 [inline] softirqs last disabled at (2264): [] taprio_change+0x2aa8/0x3604 net/sched/sch_taprio.c:1556 CPU: 1 PID: 4819 Comm: syz.3.141 Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] pc : _raw_spin_unlock_irqrestore+0xbc/0x158 kernel/locking/spinlock.c:194 lr : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] lr : _raw_spin_unlock_irqrestore+0xac/0x158 kernel/locking/spinlock.c:194 sp : ffff800022556a80 x29: ffff800022556a90 x28: 0000000000000000 x27: ffff0000e56f9ac0 x26: ffff7000044aad74 x25: ffff0000c0c08400 x24: ffff0000e56f98f0 x23: 0000000000000000 x22: ffff8000101f6e68 x21: ffff0000e56f9b00 x20: ffff0000e56f9ae8 x19: 0000000000000000 x18: ffff800022556500 x17: 0000000000000000 x16: ffff8000082ec9a8 x15: 0000000000000005 x14: 1ffff0000295806a x13: dfff800000000000 x12: 0000000000000003 x11: 0000000000000202 x10: 0000000000000003 x9 : 0000000000000080 x8 : 00000000000000c0 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff80000804605c x2 : 0000000000000002 x1 : ffff800011c1ad00 x0 : ffff80019f79c000 Call trace: arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0xbc/0x158 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:418 [inline] taprio_change+0x2e7c/0x3604 net/sched/sch_taprio.c:1617 taprio_init+0x46c/0x514 net/sched/sch_taprio.c:1749 qdisc_create+0x6fc/0xf44 net/sched/sch_api.c:1264 tc_modify_qdisc+0x8fc/0x1364 rtnetlink_rcv_msg+0xa74/0xdac net/core/rtnetlink.c:5618 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2503 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:5636 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline] netlink_unicast+0x664/0x938 net/netlink/af_netlink.c:1352 netlink_sendmsg+0x844/0xb38 net/netlink/af_netlink.c:1920 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x584/0x870 net/socket.c:2431 ___sys_sendmsg+0x214/0x294 net/socket.c:2485 __sys_sendmsg net/socket.c:2514 [inline] __do_sys_sendmsg net/socket.c:2523 [inline] __se_sys_sendmsg net/socket.c:2521 [inline] __arm64_sys_sendmsg+0x1ac/0x25c net/socket.c:2521 __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:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584