CVE-2022-50228

In the Linux kernel, the following vulnerability has been resolved:

KVM: SVM: Dont BUG if userspace injects an interrupt with GIF=0

Dont BUG/WARN on interrupt injection due to GIF being cleared, since its trivial for userspace to force the situation via KVM_SET_VCPU_EVENTS (even if having at least a WARN there would be correct for KVM internally generated injections).

kernel BUG at arch/x86/kvm/svm/svm.c:3386! invalid opcode: 0000 [#1] SMP CPU: 15 PID: 926 Comm: smm_test Not tainted 5.17.0-rc3+ #264 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:svm_inject_irq+0xab/0xb0 [kvm_amd] Code: <0f> 0b 0f 1f 00 0f 1f 44 00 00 80 3d ac b3 01 00 00 55 48 89 f5 53 RSP: 0018:ffffc90000b37d88 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88810a234ac0 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffc90000b37df7 RDI: ffff88810a234ac0 RBP: ffffc90000b37df7 R08: ffff88810a1fa410 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888109571000 R14: ffff88810a234ac0 R15: 0000000000000000 FS: 0000000001821380(0000) GS:ffff88846fdc0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f74fc550008 CR3: 000000010a6fe000 CR4: 0000000000350ea0 Call Trace: inject_pending_event+0x2f7/0x4c0 [kvm] kvm_arch_vcpu_ioctl_run+0x791/0x17a0 [kvm] kvm_vcpu_ioctl+0x26d/0x650 [kvm] __x64_sys_ioctl+0x82/0xb0 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x44/0xae

Affected Software

References

• https://git.kernel.org/stable/c/2c49adeb020995236e63722ef6d0bee14372f471
• https://git.kernel.org/stable/c/2eee1dba70f57148fc7f8252613bfae6bd4b04e3
• https://git.kernel.org/stable/c/3d4e2d884da6312df7c9b85fbf671de49204ead6
• https://git.kernel.org/stable/c/68e1313bb8809e8addcd9431f2bfea0e8ddbca80
• https://git.kernel.org/stable/c/6afe88fbb40eac3291a8728688d61fdc745d8008
• https://git.kernel.org/stable/c/6fcbab82ccbcde915644085f73d3487938bda42d
• https://git.kernel.org/stable/c/8bb683490278005b4caf61e22b0828a04d282e86
• https://git.kernel.org/stable/c/c3396c1c8b87510f2ac2a674948156577559d42d
• https://git.kernel.org/stable/c/f17c31c48e5cde9895a491d91c424eeeada3e134