crypto: ccree - only try to map auth tag if needed

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Make sure to only add the size of the auth tag to the source mapping
for encryption if it is an in-place operation. Failing to do this
previously caused us to try and map auth size len bytes from a NULL
mapping and crashing if both the cryptlen and assoclen are zero.

Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Gilad Ben-Yossef 2020-01-29 16:37:55 +02:00 • committed by Herbert Xu

parent ce0fc6db38

commit 504e84abec

1 changed files with 4 additions and 2 deletions

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drivers/crypto/ccree/cc_buffer_mgr.c

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