crypto: ccp - Fix memory leak in SEV INIT_EX path

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allocated pages in _init_ext_path are never freed and sev_init_ex_buffer
is left pointing at the leaked memory in case of any failures during the
function..

Fix by adding an error path that frees the pages and clears
sev_init_ex_buffer. Make sure we only free the memory if the failure
happens before the conversion. Otherwise, we may end up trying to free
up converted pages in case of reclaim failure. rmp_mark_pages_firmware
failures should be rare enough to avoid more code complexity to track
down which pages were reclaimed/leaked vs which are not.

Fixes: 7364a6fbca ("crypto: ccp: Handle non-volatile INIT_EX data when SNP is enabled")

Reported-by: Sashiko <sashiko-bot@kernel.org>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Atish Patra <atishp@meta.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Atish Patra 2026-06-02 15:36:35 -07:00 • committed by Herbert Xu

parent b0e7ec0dab

commit c8e53ada20

1 changed files with 14 additions and 3 deletions

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drivers/crypto/ccp/sev-dev.c

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