crypto: s390/aes - Fix buffer overread in CTR mode

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commit d07f951903 upstream.

When processing the last block, the s390 ctr code will always read
a whole block, even if there isn't a whole block of data left.  Fix
this by using the actual length left and copy it into a buffer first
for processing.

Fixes: 0200f3ecc1 ("crypto: s390 - add System z hardware support for CTR mode")
Cc: <stable@vger.kernel.org>
Reported-by: Guangwu Zhang <guazhang@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewd-by: Harald Freudenberger <freude@de.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Herbert Xu 2023-11-28 14:22:13 +08:00 • committed by Greg Kroah-Hartman

parent aa8aa16ed9

commit dbc9a791a7

2 changed files with 6 additions and 2 deletions

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4

arch/s390/crypto/aes_s390.c

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4

arch/s390/crypto/paes_s390.c

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