Tom Lendacky dd093fb08e virt/sev-guest: Return -EIO if certificate buffer is not large enough ...

Commit

  47894e0fa6 ("virt/sev-guest: Prevent IV reuse in the SNP guest driver")

changed the behavior associated with the return value when the caller
does not supply a large enough certificate buffer. Prior to the commit a
value of -EIO was returned. Now, 0 is returned.  This breaks the
established ABI with the user.

Change the code to detect the buffer size error and return -EIO.

Fixes: 47894e0fa6 ("virt/sev-guest: Prevent IV reuse in the SNP guest driver")
Reported-by: Larry Dewey <[email protected]>
Signed-off-by: Tom Lendacky <[email protected]>
Signed-off-by: Borislav Petkov (AMD) <[email protected]>
Tested-by: Larry Dewey <[email protected]>
Cc: <[email protected]>
Link: https://lore.kernel.org/r/2afbcae6daf13f7ad5a4296692e0a0fe1bc1e4ee.1677083979.git.thomas.lendacky@amd.com

2023-03-01 10:17:46 +01:00

..

efi_secret

…

sev-guest

virt/sev-guest: Return -EIO if certificate buffer is not large enough

2023-03-01 10:17:46 +01:00

tdx-guest

virt: Add TDX guest driver

2022-11-17 11:04:23 -08:00