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[v2,09/11] crypto: testmgr - check err on kpp maxsize

Message ID 1495033238-26016-10-git-send-email-tudor.ambarus@microchip.com (mailing list archive)
State Changes Requested
Delegated to: Herbert Xu
Headers show

Commit Message

Tudor Ambarus May 17, 2017, 3 p.m. UTC 
crypto_kpp_maxsize() returns minimum length for output buffer
or error code if key hasn't been set.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
 crypto/testmgr.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 87a4abd..0bf9a00 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -2013,6 +2013,11 @@  static int do_test_kpp(struct crypto_kpp *tfm, const struct kpp_testvec *vec,
 		goto free_req;
 
 	out_len_max = crypto_kpp_maxsize(tfm);
+	if (out_len_max < 0) {
+		err = out_len_max;
+		goto free_req;
+	}
+
 	output_buf = kzalloc(out_len_max, GFP_KERNEL);
 	if (!output_buf) {
 		err = -ENOMEM;