x86/sev: Harden #VC instruction emulation somewhat

Browse source

Compare the opcode bytes at rIP for each #VC exit reason to verify the
instruction which raised the #VC exception is actually the right one.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20240105101407.11694-1-bp@alien8.de

...

This commit is contained in:

Borislav Petkov (AMD) 2024-01-05 11:14:07 +01:00

parent 41bccc98fb

commit e3ef461af3

3 changed files with 108 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

4

arch/x86/boot/compressed/sev.c

View file

102

arch/x86/kernel/sev-shared.c

View file

5

arch/x86/kernel/sev.c

View file