From 573dbd95964b01a942aa0c68e92b06f2c9536964 Mon Sep 17 00:00:00 2001 From: Jesper Juhl Date: Thu, 1 Sep 2005 17:44:29 -0700 Subject: [PATCH] [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 Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- drivers/net/wireless/airo.c | 3 +-- fs/nfsd/nfs4recover.c | 3 +-- net/ipv4/ah4.c | 18 ++++++------------ net/ipv4/esp4.c | 24 ++++++++---------------- net/ipv4/ipcomp.c | 3 +-- net/ipv6/addrconf.c | 6 ++---- net/ipv6/ah6.c | 18 ++++++------------ net/ipv6/esp6.c | 24 ++++++++---------------- net/ipv6/ipcomp6.c | 3 +-- net/sctp/endpointola.c | 3 +-- net/sctp/socket.c | 3 +-- net/sunrpc/auth_gss/gss_krb5_crypto.c | 3 +-- net/sunrpc/auth_gss/gss_krb5_mech.c | 9 +++------ net/sunrpc/auth_gss/gss_spkm3_mech.c | 12 ++++-------- 14 files changed, 44 insertions(+), 88 deletions(-) diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c index 7fdb85dda4..2bb8170cf6 100644 --- a/drivers/net/wireless/airo.c +++ b/drivers/net/wireless/airo.c @@ -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 ); diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index 02132f3332..954cf893d5 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -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; } diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c index 514c85b263..035ad2c9e1 100644 --- a/net/ipv4/ah4.c +++ b/net/ipv4/ah4.c @@ -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); } diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c index b31ffc5053..1b5a09d1b9 100644 --- a/net/ipv4/esp4.c +++ b/net/ipv4/esp4.c @@ -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); } diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c index dcb7ee6c48..fc718df17b 100644 --- a/net/ipv4/ipcomp.c +++ b/net/ipv4/ipcomp.c @@ -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); } diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 937ad32db7..6d6fb74f3b 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -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 diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c index 0ebfad907a..f3629730eb 100644 --- a/net/ipv6/ah6.c +++ b/net/ipv6/ah6.c @@ -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); } diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c index e8bff9d3d9..9b27460f0c 100644 --- a/net/ipv6/esp6.c +++ b/net/ipv6/esp6.c @@ -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); } diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c index 135383ef53..85bfbc69b2 100644 --- a/net/ipv6/ipcomp6.c +++ b/net/ipv6/ipcomp6.c @@ -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); } diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c index e47ac0d1a6..e22ccd6559 100644 --- a/net/sctp/endpointola.c +++ b/net/sctp/endpointola.c @@ -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); diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 4454afe472..91ec8c9369 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -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; } diff --git a/net/sunrpc/auth_gss/gss_krb5_crypto.c b/net/sunrpc/auth_gss/gss_krb5_crypto.c index 7ad74449b1..ee6ae74cd1 100644 --- a/net/sunrpc/auth_gss/gss_krb5_crypto.c +++ b/net/sunrpc/auth_gss/gss_krb5_crypto.c @@ -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; } diff --git a/net/sunrpc/auth_gss/gss_krb5_mech.c b/net/sunrpc/auth_gss/gss_krb5_mech.c index cf726510df..606a8a82ca 100644 --- a/net/sunrpc/auth_gss/gss_krb5_mech.c +++ b/net/sunrpc/auth_gss/gss_krb5_mech.c @@ -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); } diff --git a/net/sunrpc/auth_gss/gss_spkm3_mech.c b/net/sunrpc/auth_gss/gss_spkm3_mech.c index dad05994c3..6c97d61baa 100644 --- a/net/sunrpc/auth_gss/gss_spkm3_mech.c +++ b/net/sunrpc/auth_gss/gss_spkm3_mech.c @@ -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); } -- 2.39.2