CVE-2025-40184

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> KVM: arm64: Fix debug checking for np-guests using huge mappings<br /> <br /> When running with transparent huge pages and CONFIG_NVHE_EL2_DEBUG then<br /> the debug checking in assert_host_shared_guest() fails on the launch of an<br /> np-guest. This WARN_ON() causes a panic and generates the stack below.<br /> <br /> In __pkvm_host_relax_perms_guest() the debug checking assumes the mapping<br /> is a single page but it may be a block map. Update the checking so that<br /> the size is not checked and just assumes the correct size.<br /> <br /> While we&amp;#39;re here make the same fix in __pkvm_host_mkyoung_guest().<br /> <br /> Info: # lkvm run -k /share/arch/arm64/boot/Image -m 704 -c 8 --name guest-128<br /> Info: Removed ghost socket file "/.lkvm//guest-128.sock".<br /> [ 1406.521757] kvm [141]: nVHE hyp BUG at: arch/arm64/kvm/hyp/nvhe/mem_protect.c:1088!<br /> [ 1406.521804] kvm [141]: nVHE call trace:<br /> [ 1406.521828] kvm [141]: [] __kvm_nvhe_hyp_panic+0xb4/0xe8<br /> [ 1406.521946] kvm [141]: [] __kvm_nvhe_assert_host_shared_guest+0xb0/0x10c<br /> [ 1406.522049] kvm [141]: [] __kvm_nvhe___pkvm_host_relax_perms_guest+0x48/0x104<br /> [ 1406.522157] kvm [141]: [] __kvm_nvhe_handle___pkvm_host_relax_perms_guest+0x64/0x7c<br /> [ 1406.522250] kvm [141]: [] __kvm_nvhe_handle_trap+0x8c/0x1a8<br /> [ 1406.522333] kvm [141]: [] __kvm_nvhe___skip_pauth_save+0x4/0x4<br /> [ 1406.522454] kvm [141]: ---[ end nVHE call trace ]---<br /> [ 1406.522477] kvm [141]: Hyp Offset: 0xfffece8013600000<br /> [ 1406.522554] Kernel panic - not syncing: HYP panic:<br /> [ 1406.522554] PS:834003c9 PC:0000b1806db6d170 ESR:00000000f2000800<br /> [ 1406.522554] FAR:ffff8000804be420 HPFAR:0000000000804be0 PAR:0000000000000000<br /> [ 1406.522554] VCPU:0000000000000000<br /> [ 1406.523337] CPU: 3 UID: 0 PID: 141 Comm: kvm-vcpu-0 Not tainted 6.16.0-rc7 #97 PREEMPT<br /> [ 1406.523485] Hardware name: FVP Base RevC (DT)<br /> [ 1406.523566] Call trace:<br /> [ 1406.523629] show_stack+0x18/0x24 (C)<br /> [ 1406.523753] dump_stack_lvl+0xd4/0x108<br /> [ 1406.523899] dump_stack+0x18/0x24<br /> [ 1406.524040] panic+0x3d8/0x448<br /> [ 1406.524184] nvhe_hyp_panic_handler+0x10c/0x23c<br /> [ 1406.524325] kvm_handle_guest_abort+0x68c/0x109c<br /> [ 1406.524500] handle_exit+0x60/0x17c<br /> [ 1406.524630] kvm_arch_vcpu_ioctl_run+0x2e0/0x8c0<br /> [ 1406.524794] kvm_vcpu_ioctl+0x1a8/0x9cc<br /> [ 1406.524919] __arm64_sys_ioctl+0xac/0x104<br /> [ 1406.525067] invoke_syscall+0x48/0x10c<br /> [ 1406.525189] el0_svc_common.constprop.0+0x40/0xe0<br /> [ 1406.525322] do_el0_svc+0x1c/0x28<br /> [ 1406.525441] el0_svc+0x38/0x120<br /> [ 1406.525588] el0t_64_sync_handler+0x10c/0x138<br /> [ 1406.525750] el0t_64_sync+0x1ac/0x1b0<br /> [ 1406.525876] SMP: stopping secondary CPUs<br /> [ 1406.525965] Kernel Offset: disabled<br /> [ 1406.526032] CPU features: 0x0000,00000080,8e134ca1,9446773f<br /> [ 1406.526130] Memory Limit: none<br /> [ 1406.959099] ---[ end Kernel panic - not syncing: HYP panic:<br /> [ 1406.959099] PS:834003c9 PC:0000b1806db6d170 ESR:00000000f2000800<br /> [ 1406.959099] FAR:ffff8000804be420 HPFAR:0000000000804be0 PAR:0000000000000000<br /> [ 1406.959099] VCPU:0000000000000000 ]