提交 b81126e0 编写于 作者: I Ingo Franzki 提交者: Martin Schwidefsky

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: 27937843 ("s390/crypt: Add protected key AES module")
Signed-off-by: NIngo Franzki <ifranzki@linux.ibm.com>
Acked-by: NHarald Freudenberger <freude@linux.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
上级 60c1f892
无相关合并请求
......@@ -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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