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[CRYPTO]: crypto_free_tfm() callers no longer need to check for NULL 

Since the patch to add a NULL short-circuit to crypto_free_tfm() went in,
there's no longer any need for callers of that function to check for NULL.
This patch removes the redundant NULL checks and also a few similar checks
for NULL before calls to kfree() that I ran into while doing the
crypto_free_tfm bits.

I've succesfuly compile tested this patch, and a kernel with the patch 
applied boots and runs just fine.

When I posted the patch to LKML (and other lists/people on Cc) it drew the
following comments :

 J. Bruce Fields commented
  "I've no problem with the auth_gss or nfsv4 bits.--b."

 Sridhar Samudrala said
  "sctp change looks fine."

 Herbert Xu signed off on the patch.

So, I guess this is ready to be dropped into -mm and eventually mainline.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jesper Juhl 2005-09-01 17:44:29 -07:00 committed by David S. Miller
parent 5170dbebbb
commit 573dbd9596
14 changed files with 44 additions and 88 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/wireless/airo.c
View File

@ -2403,8 +2403,7 @@ void stop_airo_card( struct net_device *dev, int freeres )
}
}
#ifdef MICSUPPORT
if (ai->tfm)
crypto_free_tfm(ai->tfm);
crypto_free_tfm(ai->tfm);
#endif
del_airo_dev( dev );
free_netdev( dev );

3
fs/nfsd/nfs4recover.c
View File

@ -114,8 +114,7 @@ nfs4_make_rec_clidname(char *dname, struct xdr_netobj *clname)
kfree(cksum.data);
status = nfs_ok;
out:
if (tfm)
crypto_free_tfm(tfm);
crypto_free_tfm(tfm);
return status;
}

18
net/ipv4/ah4.c
View File

@ -263,10 +263,8 @@ static int ah_init_state(struct xfrm_state *x)
error:
if (ahp) {
if (ahp->work_icv)
kfree(ahp->work_icv);
if (ahp->tfm)
crypto_free_tfm(ahp->tfm);
kfree(ahp->work_icv);
crypto_free_tfm(ahp->tfm);
kfree(ahp);
}
return -EINVAL;
@ -279,14 +277,10 @@ static void ah_destroy(struct xfrm_state *x)
if (!ahp)
return;
if (ahp->work_icv) {
kfree(ahp->work_icv);
ahp->work_icv = NULL;
}
if (ahp->tfm) {
crypto_free_tfm(ahp->tfm);
ahp->tfm = NULL;
}
kfree(ahp->work_icv);
ahp->work_icv = NULL;
crypto_free_tfm(ahp->tfm);
ahp->tfm = NULL;
kfree(ahp);
}

24
net/ipv4/esp4.c
View File

@ -343,22 +343,14 @@ static void esp_destroy(struct xfrm_state *x)
if (!esp)
return;
if (esp->conf.tfm) {
crypto_free_tfm(esp->conf.tfm);
esp->conf.tfm = NULL;
}
if (esp->conf.ivec) {
kfree(esp->conf.ivec);
esp->conf.ivec = NULL;
}
if (esp->auth.tfm) {
crypto_free_tfm(esp->auth.tfm);
esp->auth.tfm = NULL;
}
if (esp->auth.work_icv) {
kfree(esp->auth.work_icv);
esp->auth.work_icv = NULL;
}
crypto_free_tfm(esp->conf.tfm);
esp->conf.tfm = NULL;
kfree(esp->conf.ivec);
esp->conf.ivec = NULL;
crypto_free_tfm(esp->auth.tfm);
esp->auth.tfm = NULL;
kfree(esp->auth.work_icv);
esp->auth.work_icv = NULL;
kfree(esp);
}

3
net/ipv4/ipcomp.c
View File

@ -345,8 +345,7 @@ static void ipcomp_free_tfms(struct crypto_tfm **tfms)
for_each_cpu(cpu) {
struct crypto_tfm *tfm = *per_cpu_ptr(tfms, cpu);
if (tfm)
crypto_free_tfm(tfm);
crypto_free_tfm(tfm);
}
free_percpu(tfms);
}

6
net/ipv6/addrconf.c
View File

@ -3593,10 +3593,8 @@ void __exit addrconf_cleanup(void)
rtnl_unlock();
#ifdef CONFIG_IPV6_PRIVACY
if (likely(md5_tfm != NULL)) {
crypto_free_tfm(md5_tfm);
md5_tfm = NULL;
}
crypto_free_tfm(md5_tfm);
md5_tfm = NULL;
#endif
#ifdef CONFIG_PROC_FS

18
net/ipv6/ah6.c
View File

@ -401,10 +401,8 @@ static int ah6_init_state(struct xfrm_state *x)
error:
if (ahp) {
if (ahp->work_icv)
kfree(ahp->work_icv);
if (ahp->tfm)
crypto_free_tfm(ahp->tfm);
kfree(ahp->work_icv);
crypto_free_tfm(ahp->tfm);
kfree(ahp);
}
return -EINVAL;
@ -417,14 +415,10 @@ static void ah6_destroy(struct xfrm_state *x)
if (!ahp)
return;
if (ahp->work_icv) {
kfree(ahp->work_icv);
ahp->work_icv = NULL;
}
if (ahp->tfm) {
crypto_free_tfm(ahp->tfm);
ahp->tfm = NULL;
}
kfree(ahp->work_icv);
ahp->work_icv = NULL;
crypto_free_tfm(ahp->tfm);
ahp->tfm = NULL;
kfree(ahp);
}

24
net/ipv6/esp6.c
View File

@ -276,22 +276,14 @@ static void esp6_destroy(struct xfrm_state *x)
if (!esp)
return;
if (esp->conf.tfm) {
crypto_free_tfm(esp->conf.tfm);
esp->conf.tfm = NULL;
}
if (esp->conf.ivec) {
kfree(esp->conf.ivec);
esp->conf.ivec = NULL;
}
if (esp->auth.tfm) {
crypto_free_tfm(esp->auth.tfm);
esp->auth.tfm = NULL;
}
if (esp->auth.work_icv) {
kfree(esp->auth.work_icv);
esp->auth.work_icv = NULL;
}
crypto_free_tfm(esp->conf.tfm);
esp->conf.tfm = NULL;
kfree(esp->conf.ivec);
esp->conf.ivec = NULL;
crypto_free_tfm(esp->auth.tfm);
esp->auth.tfm = NULL;
kfree(esp->auth.work_icv);
esp->auth.work_icv = NULL;
kfree(esp);
}

3
net/ipv6/ipcomp6.c
View File

@ -341,8 +341,7 @@ static void ipcomp6_free_tfms(struct crypto_tfm **tfms)
for_each_cpu(cpu) {
struct crypto_tfm *tfm = *per_cpu_ptr(tfms, cpu);
if (tfm)
crypto_free_tfm(tfm);
crypto_free_tfm(tfm);
}
free_percpu(tfms);
}

3
net/sctp/endpointola.c
View File

@ -193,8 +193,7 @@ static void sctp_endpoint_destroy(struct sctp_endpoint *ep)
sctp_unhash_endpoint(ep);
/* Free up the HMAC transform. */
if (sctp_sk(ep->base.sk)->hmac)
sctp_crypto_free_tfm(sctp_sk(ep->base.sk)->hmac);
sctp_crypto_free_tfm(sctp_sk(ep->base.sk)->hmac);
/* Cleanup. */
sctp_inq_free(&ep->base.inqueue);

3
net/sctp/socket.c
View File

@ -4194,8 +4194,7 @@ out:
sctp_release_sock(sk);
return err;
cleanup:
if (tfm)
sctp_crypto_free_tfm(tfm);
sctp_crypto_free_tfm(tfm);
goto out;
}

3
net/sunrpc/auth_gss/gss_krb5_crypto.c
View File

@ -199,8 +199,7 @@ make_checksum(s32 cksumtype, char *header, int hdrlen, struct xdr_buf *body,
crypto_digest_final(tfm, cksum->data);
code = 0;
out:
if (tfm)
crypto_free_tfm(tfm);
crypto_free_tfm(tfm);
return code;
}

9
net/sunrpc/auth_gss/gss_krb5_mech.c
View File

@ -185,12 +185,9 @@ static void
gss_delete_sec_context_kerberos(void *internal_ctx) {
struct krb5_ctx *kctx = internal_ctx;
if (kctx->seq)
crypto_free_tfm(kctx->seq);
if (kctx->enc)
crypto_free_tfm(kctx->enc);
if (kctx->mech_used.data)
kfree(kctx->mech_used.data);
crypto_free_tfm(kctx->seq);
crypto_free_tfm(kctx->enc);
kfree(kctx->mech_used.data);
kfree(kctx);
}

12
net/sunrpc/auth_gss/gss_spkm3_mech.c
View File

@ -214,14 +214,10 @@ static void
gss_delete_sec_context_spkm3(void *internal_ctx) {
struct spkm3_ctx *sctx = internal_ctx;
if(sctx->derived_integ_key)
crypto_free_tfm(sctx->derived_integ_key);
if(sctx->derived_conf_key)
crypto_free_tfm(sctx->derived_conf_key);
if(sctx->share_key.data)
kfree(sctx->share_key.data);
if(sctx->mech_used.data)
kfree(sctx->mech_used.data);
crypto_free_tfm(sctx->derived_integ_key);
crypto_free_tfm(sctx->derived_conf_key);
kfree(sctx->share_key.data);
kfree(sctx->mech_used.data);
kfree(sctx);
}