On Mon, 28 Oct 2024 23:45:33 +0000, Raghavendra Rao Ananta wrote:
> Improper use of userspace_irqchip_in_use led to syzbot hitting the
> following WARN_ON() in kvm_timer_update_irq():
>
> WARNING: CPU: 0 PID: 3281 at arch/arm64/kvm/arch_timer.c:459
> kvm_timer_update_irq+0x21c/0x394
> Call trace:
> kvm_timer_update_irq+0x21c/0x394 arch/arm64/kvm/arch_timer.c:459
> kvm_timer_vcpu_reset+0x158/0x684 arch/arm64/kvm/arch_timer.c:968
> kvm_reset_vcpu+0x3b4/0x560 arch/arm64/kvm/reset.c:264
> kvm_vcpu_set_target arch/arm64/kvm/arm.c:1553 [inline]
> kvm_arch_vcpu_ioctl_vcpu_init arch/arm64/kvm/arm.c:1573 [inline]
> kvm_arch_vcpu_ioctl+0x112c/0x1b3c arch/arm64/kvm/arm.c:1695
> kvm_vcpu_ioctl+0x4ec/0xf74 virt/kvm/kvm_main.c:4658
> vfs_ioctl fs/ioctl.c:51 [inline]
> __do_sys_ioctl fs/ioctl.c:907 [inline]
> __se_sys_ioctl fs/ioctl.c:893 [inline]
> __arm64_sys_ioctl+0x108/0x184 fs/ioctl.c:893
> __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
> invoke_syscall+0x78/0x1b8 arch/arm64/kernel/syscall.c:49
> el0_svc_common+0xe8/0x1b0 arch/arm64/kernel/syscall.c:132
> do_el0_svc+0x40/0x50 arch/arm64/kernel/syscall.c:151
> el0_svc+0x54/0x14c arch/arm64/kernel/entry-common.c:712
> el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
> el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
>
> [...]
Applied to kvmarm/next, thanks!
[1/1] KVM: arm64: Get rid of userspace_irqchip_in_use
https://git.kernel.org/kvmarm/kvmarm/c/e571ebcff926
--
Best,
Oliver
