diff mbox series

[08/22] crypto: x86/glue_helper - add check for xts input length equal to zero

Message ID 20200807162010.18979-9-andrei.botila@oss.nxp.com
State New
Headers show
Series crypto: add check for xts input length equal to zero | expand

Commit Message

Andrei Botila Aug. 7, 2020, 4:19 p.m. UTC 
From: Andrei Botila <andrei.botila@nxp.com>

Standardize the way input lengths equal to 0 are handled in all skcipher
algorithms. All the algorithms return 0 for input lengths equal to zero.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrei Botila <andrei.botila@nxp.com>
---
 arch/x86/crypto/glue_helper.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/arch/x86/crypto/glue_helper.c b/arch/x86/crypto/glue_helper.c
index d3d91a0abf88..cc5042c72910 100644
--- a/arch/x86/crypto/glue_helper.c
+++ b/arch/x86/crypto/glue_helper.c
@@ -275,6 +275,9 @@  int glue_xts_req_128bit(const struct common_glue_ctx *gctx,
 	unsigned int nbytes, tail;
 	int err;
 
+	if (!req->cryptlen)
+		return 0;
+
 	if (req->cryptlen < XTS_BLOCK_SIZE)
 		return -EINVAL;