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L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. ===================================================== BUG: KMSAN: uninit-value in cpuid_entry2_find arch/x86/kvm/cpuid.c:68 [inline] BUG: KMSAN: uninit-value in kvm_find_cpuid_entry arch/x86/kvm/cpuid.c:1103 [inline] BUG: KMSAN: uninit-value in kvm_cpuid+0x456/0x28f0 arch/x86/kvm/cpuid.c:1183 cpuid_entry2_find arch/x86/kvm/cpuid.c:68 [inline] kvm_find_cpuid_entry arch/x86/kvm/cpuid.c:1103 [inline] kvm_cpuid+0x456/0x28f0 arch/x86/kvm/cpuid.c:1183 kvm_vcpu_reset+0x13fb/0x1c20 arch/x86/kvm/x86.c:10885 kvm_apic_accept_events+0x58f/0x8c0 arch/x86/kvm/lapic.c:2923 vcpu_enter_guest+0xfd2/0x6d80 arch/x86/kvm/x86.c:9534 vcpu_run+0x7f5/0x18d0 arch/x86/kvm/x86.c:9788 kvm_arch_vcpu_ioctl_run+0x245b/0x2d10 arch/x86/kvm/x86.c:10020 kvm_vcpu_ioctl+0x1055/0x1e00 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3749 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0x2df/0x4a0 fs/ioctl.c:860 __x64_sys_ioctl+0xd8/0x110 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae Local variable ----dummy@kvm_vcpu_reset created at: kvm_vcpu_reset+0x1fb/0x1c20 arch/x86/kvm/x86.c:10812 kvm_apic_accept_events+0x58f/0x8c0 arch/x86/kvm/lapic.c:2923 ===================================================== Kernel panic - not syncing: panic_on_kmsan set ... CPU: 1 PID: 6364 Comm: syz-executor072 Tainted: G B 5.15.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1ff/0x28e lib/dump_stack.c:106 dump_stack+0x25/0x28 lib/dump_stack.c:113 panic+0x44f/0xdeb kernel/panic.c:232 kmsan_report+0x2ee/0x300 mm/kmsan/report.c:186 __msan_warning+0xd7/0x150 mm/kmsan/instrumentation.c:208 cpuid_entry2_find arch/x86/kvm/cpuid.c:68 [inline] kvm_find_cpuid_entry arch/x86/kvm/cpuid.c:1103 [inline] kvm_cpuid+0x456/0x28f0 arch/x86/kvm/cpuid.c:1183 kvm_vcpu_reset+0x13fb/0x1c20 arch/x86/kvm/x86.c:10885 kvm_apic_accept_events+0x58f/0x8c0 arch/x86/kvm/lapic.c:2923 vcpu_enter_guest+0xfd2/0x6d80 arch/x86/kvm/x86.c:9534 vcpu_run+0x7f5/0x18d0 arch/x86/kvm/x86.c:9788 kvm_arch_vcpu_ioctl_run+0x245b/0x2d10 arch/x86/kvm/x86.c:10020 kvm_vcpu_ioctl+0x1055/0x1e00 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3749 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0x2df/0x4a0 fs/ioctl.c:860 __x64_sys_ioctl+0xd8/0x110 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f51eb544a19 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe2fe74dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f51eb544a19 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe2fe74f68 R10: 0000000000009120 R11: 0000000000000246 R12: 00007f51eb507c80 R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..
| Manager | Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ci-upstream-kmsan-gce | 2021/09/25 03:57 | https://github.com/google/kmsan.git master | cd2c05533838 | 8cac236e | .config | log | report | syz | C | KMSAN: uninit-value in kvm_cpuid | |
| ci-upstream-kmsan-gce | 2021/10/25 16:23 | https://github.com/google/kmsan.git master | 82e66ad2e586 | 4f0000ee | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/24 05:35 | https://github.com/google/kmsan.git master | 82e66ad2e586 | 282f03fb | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/23 20:15 | https://github.com/google/kmsan.git master | 82e66ad2e586 | 282f03fb | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/23 08:35 | https://github.com/google/kmsan.git master | 82e66ad2e586 | 282f03fb | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/21 20:53 | https://github.com/google/kmsan.git master | d6493d2046c4 | c5cb7da8 | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/21 20:23 | https://github.com/google/kmsan.git master | d6493d2046c4 | c5cb7da8 | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/20 14:21 | https://github.com/google/kmsan.git master | d6493d2046c4 | 418a00eb | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/16 20:18 | https://github.com/google/kmsan.git master | d6493d2046c4 | 0c5d9412 | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/16 19:55 | https://github.com/google/kmsan.git master | d6493d2046c4 | 0c5d9412 | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/16 19:55 | https://github.com/google/kmsan.git master | d6493d2046c4 | 0c5d9412 | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/16 01:51 | https://github.com/google/kmsan.git master | 8bdd014d5dc7 | 0c5d9412 | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/10 02:53 | https://github.com/google/kmsan.git master | c7f84f4e1147 | 838e7e2c | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/10 02:53 | https://github.com/google/kmsan.git master | c7f84f4e1147 | 838e7e2c | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/10/02 22:54 | https://github.com/google/kmsan.git master | 90f502f5d016 | db0f5787 | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/09/28 04:07 | https://github.com/google/kmsan.git master | cd2c05533838 | 78494d16 | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/09/28 01:31 | https://github.com/google/kmsan.git master | cd2c05533838 | 78494d16 | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/09/27 23:47 | https://github.com/google/kmsan.git master | cd2c05533838 | 78494d16 | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/09/24 23:01 | https://github.com/google/kmsan.git master | cd2c05533838 | 8cac236e | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/09/24 22:55 | https://github.com/google/kmsan.git master | cd2c05533838 | 8cac236e | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/09/24 21:56 | https://github.com/google/kmsan.git master | cd2c05533838 | 8cac236e | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid | ||
| ci-upstream-kmsan-gce | 2021/09/24 21:35 | https://github.com/google/kmsan.git master | cd2c05533838 | 8cac236e | .config | log | report | info | KMSAN: uninit-value in kvm_cpuid |