CVE-2022-48764

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> KVM: x86: Free kvm_cpuid_entry2 array on post-KVM_RUN KVM_SET_CPUID{,2}<br /> <br /> Free the "struct kvm_cpuid_entry2" array on successful post-KVM_RUN<br /> KVM_SET_CPUID{,2} to fix a memory leak, the callers of kvm_set_cpuid()<br /> free the array only on failure.<br /> <br /> BUG: memory leak<br /> unreferenced object 0xffff88810963a800 (size 2048):<br /> comm "syz-executor025", pid 3610, jiffies 4294944928 (age 8.080s)<br /> hex dump (first 32 bytes):<br /> 00 00 00 00 00 00 00 00 00 00 00 00 0d 00 00 00 ................<br /> 47 65 6e 75 6e 74 65 6c 69 6e 65 49 00 00 00 00 GenuntelineI....<br /> backtrace:<br /> [] kmalloc_node include/linux/slab.h:604 [inline]<br /> [] kvmalloc_node+0x3e/0x100 mm/util.c:580<br /> [] kvmalloc include/linux/slab.h:732 [inline]<br /> [] vmemdup_user+0x22/0x100 mm/util.c:199<br /> [] kvm_vcpu_ioctl_set_cpuid2+0x8f/0xf0 arch/x86/kvm/cpuid.c:423<br /> [] kvm_arch_vcpu_ioctl+0xb99/0x1e60 arch/x86/kvm/x86.c:5251<br /> [] kvm_vcpu_ioctl+0x4ad/0x950 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4066<br /> [] vfs_ioctl fs/ioctl.c:51 [inline]<br /> [] __do_sys_ioctl fs/ioctl.c:874 [inline]<br /> [] __se_sys_ioctl fs/ioctl.c:860 [inline]<br /> [] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860<br /> [] do_syscall_x64 arch/x86/entry/common.c:50 [inline]<br /> [] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80<br /> [] entry_SYSCALL_64_after_hwframe+0x44/0xae