Skip to main content

Browse the archive

https://github.com/torvalds/linux
27 March 2024, 02:37:15 UTC
Revision 053d2290c0307e3642e75e0185ddadf084dc36c1 authored by Sean Christopherson on 02 May 2022, 22:18:50 UTC, committed by Paolo Bonzini on 06 May 2022, 17:08:06 UTC 
KVM: VMX: Exit to userspace if vCPU has injected exception and invalid state
 
Exit to userspace with an emulation error if KVM encounters an injected
exception with invalid guest state, in addition to the existing check of
bailing if there's a pending exception (KVM doesn't support emulating
exceptions except when emulating real mode via vm86).

In theory, KVM should never get to such a situation as KVM is supposed to
exit to userspace before injecting an exception with invalid guest state.
But in practice, userspace can intervene and manually inject an exception
and/or stuff registers to force invalid guest state while a previously
injected exception is awaiting reinjection.

Fixes: fc4fad79fc3d ("KVM: VMX: Reject KVM_RUN if emulation is required with pending exception")
Reported-by: syzbot+cfafed3bb76d3e37581b@syzkaller.appspotmail.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220502221850.131873-1-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 parent 0c2c7c0
History
Tip revision: 053d2290c0307e3642e75e0185ddadf084dc36c1 authored by Sean Christopherson on 02 May 2022, 22:18:50 UTC
KVM: VMX: Exit to userspace if vCPU has injected exception and invalid state
Tip revision: 053d229
File Mode Size
Documentation
LICENSES
arch
block
certs
crypto
drivers
fs
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.clang-format -rw-r--r-- 16.6 KB
.cocciconfig -rw-r--r-- 59 bytes
.get_maintainer.ignore -rw-r--r-- 71 bytes
.gitattributes -rw-r--r-- 62 bytes
.gitignore -rw-r--r-- 1.9 KB
.mailmap -rw-r--r-- 22.2 KB
COPYING -rw-r--r-- 496 bytes
CREDITS -rw-r--r-- 98.9 KB
Kbuild -rw-r--r-- 1.3 KB
Kconfig -rw-r--r-- 555 bytes
MAINTAINERS -rw-r--r-- 641.4 KB
Makefile -rw-r--r-- 63.6 KB
README -rw-r--r-- 727 bytes

README

back to top