================================================================== BUG: KASAN: vmalloc-out-of-bounds in __do_cpuid_func_emulated arch/x86/kvm/cpuid.c:323 [inline] BUG: KASAN: vmalloc-out-of-bounds in do_cpuid_func arch/x86/kvm/cpuid.c:814 [inline] BUG: KASAN: vmalloc-out-of-bounds in do_cpuid_func arch/x86/kvm/cpuid.c:810 [inline] BUG: KASAN: vmalloc-out-of-bounds in kvm_dev_ioctl_get_cpuid+0xad7/0xb0b arch/x86/kvm/cpuid.c:891 Write of size 4 at addr ffffc90000d36050 by task syz-executor688/8988 CPU: 1 PID: 8988 Comm: syz-executor688 Not tainted 5.4.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0x5/0x30b mm/kasan/report.c:374 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506 kasan_report+0x12/0x20 mm/kasan/common.c:638 __asan_report_store4_noabort+0x17/0x20 mm/kasan/generic_report.c:139 __do_cpuid_func_emulated arch/x86/kvm/cpuid.c:323 [inline] do_cpuid_func arch/x86/kvm/cpuid.c:814 [inline] do_cpuid_func arch/x86/kvm/cpuid.c:810 [inline] kvm_dev_ioctl_get_cpuid+0xad7/0xb0b arch/x86/kvm/cpuid.c:891 kvm_arch_dev_ioctl+0x300/0x4b0 arch/x86/kvm/x86.c:3387 kvm_dev_ioctl+0x127/0x17d0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3593 __do_compat_sys_ioctl fs/compat_ioctl.c:202 [inline] __se_compat_sys_ioctl fs/compat_ioctl.c:142 [inline] __ia32_compat_sys_ioctl+0x22d/0x5c0 fs/compat_ioctl.c:142 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline] do_fast_syscall_32+0x27b/0xe16 arch/x86/entry/common.c:408 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f05a39 Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000ffc2351c EFLAGS: 00000217 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000c008ae09 RDX: 0000000020000240 RSI: 00000000000000a0 RDI: 0000000000000000 RBP: 0000000000c10000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Memory state around the buggy address: ffffc90000d35f00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ffffc90000d35f80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 >ffffc90000d36000: 00 00 00 00 00 00 00 00 00 00 f9 f9 f9 f9 f9 f9 ^ ffffc90000d36080: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ffffc90000d36100: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ==================================================================