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Commit 20e833dc authored by Hook, Gary's avatar Hook, Gary Committed by Herbert Xu
Browse files

crypto: ccp - memset structure fields to zero before reuse 



The AES GCM function reuses an 'op' data structure, which members
contain values that must be cleared for each (re)use.

This fix resolves a crypto self-test failure:
alg: aead: gcm-aes-ccp encryption test failed (wrong result) on test vector 2, cfg="two even aligned splits"

Fixes: 36cf515b ("crypto: ccp - Enable support for AES GCM on v5 CCPs")
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarGary R Hook <gary.hook@amd.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 95566aa7

drivers/crypto/ccp/ccp-ops.c

+11 −1
Original line number Diff line number Diff line
@@ -622,6 +622,7 @@ static int ccp_run_aes_gcm_cmd(struct ccp_cmd_queue *cmd_q, 


	unsigned long long *final;

	unsigned int dm_offset;

	unsigned int jobid;

	unsigned int ilen;

	bool in_place = true; /* Default value */

	int ret;
@@ -660,9 +661,11 @@ static int ccp_run_aes_gcm_cmd(struct ccp_cmd_queue *cmd_q, 
		p_tag = scatterwalk_ffwd(sg_tag, p_inp, ilen);

	}



	jobid = CCP_NEW_JOBID(cmd_q->ccp);



	memset(&op, 0, sizeof(op));

	op.cmd_q = cmd_q;

	op.jobid = CCP_NEW_JOBID(cmd_q->ccp);

	op.jobid = jobid;

	op.sb_key = cmd_q->sb_key; /* Pre-allocated */

	op.sb_ctx = cmd_q->sb_ctx; /* Pre-allocated */

	op.init = 1;
@@ -813,6 +816,13 @@ static int ccp_run_aes_gcm_cmd(struct ccp_cmd_queue *cmd_q, 
	final[0] = cpu_to_be64(aes->aad_len * 8);

	final[1] = cpu_to_be64(ilen * 8);



	memset(&op, 0, sizeof(op));

	op.cmd_q = cmd_q;

	op.jobid = jobid;

	op.sb_key = cmd_q->sb_key; /* Pre-allocated */

	op.sb_ctx = cmd_q->sb_ctx; /* Pre-allocated */

	op.init = 1;

	op.u.aes.type = aes->type;

	op.u.aes.mode = CCP_AES_MODE_GHASH;

	op.u.aes.action = CCP_AES_GHASHFINAL;

	op.src.type = CCP_MEMTYPE_SYSTEM;