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linux/drivers/virt/coco
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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 <larry.dewey@amd.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Larry Dewey <larry.dewey@amd.com>
Cc: <stable@kernel.org>
Link: https://lore.kernel.org/r/2afbcae6daf13f7ad5a4296692e0a0fe1bc1e4ee.1677083979.git.thomas.lendacky@amd.com
History 2023-03-01 10:17:46 +01:00
..
efi_secret virt: Add efi_secret module to expose confidential computing secrets 2022-04-13 19:11:20 +02:00
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