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authorIngo Franzki <ifranzki@linux.ibm.com>2018-08-27 14:28:47 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2018-09-04 10:58:17 +0200
commitb81126e01a8c6048249955feea46c8217ebefa91 (patch)
tree580b36a511e7c5dc86917aef31369d158f5203b2
parent60c1f89241d49bacf71035470684a8d7b4bb46ea (diff)
s390/crypto: Fix return code checking in cbc_paes_crypt()
The return code of cpacf_kmc() is less than the number of bytes to process in case of an error, not greater. The crypt routines for the other cipher modes already have this correctly. Cc: stable@vger.kernel.org # v4.11+ Fixes: 279378430768 ("s390/crypt: Add protected key AES module") Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com> Acked-by: Harald Freudenberger <freude@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--arch/s390/crypto/paes_s390.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/crypto/paes_s390.c b/arch/s390/crypto/paes_s390.c
index 80b27294c1de..ab9a0ebecc19 100644
--- a/arch/s390/crypto/paes_s390.c
+++ b/arch/s390/crypto/paes_s390.c
@@ -208,7 +208,7 @@ static int cbc_paes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
walk->dst.virt.addr, walk->src.virt.addr, n);
if (k)
ret = blkcipher_walk_done(desc, walk, nbytes - k);
- if (n < k) {
+ if (k < n) {
if (__cbc_paes_set_key(ctx) != 0)
return blkcipher_walk_done(desc, walk, -EIO);
memcpy(param.key, ctx->pk.protkey, MAXPROTKEYSIZE);

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