[IPV6]: Nearly complete kzalloc cleanup for net/ipv6

Stupidly use kzalloc() instead of kmalloc()/memset()
everywhere where this is possible in net/ipv6/*.c .

Signed-off-by: Ingo Oeser <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Ingo Oeser

net/ipv6/ah6.c

@@ -354,12 +354,10 @@ static int ah6_init_state(struct xfrm_state *x)
 	if (x->encap)
 		goto error;
 
-	ahp = kmalloc(sizeof(*ahp), GFP_KERNEL);
+	ahp = kzalloc(sizeof(*ahp), GFP_KERNEL);
 	if (ahp == NULL)
 		return -ENOMEM;
 
-	memset(ahp, 0, sizeof(*ahp));
-
 	ahp->key = x->aalg->alg_key;
 	ahp->key_len = (x->aalg->alg_key_len+7)/8;
 	ahp->tfm = crypto_alloc_tfm(x->aalg->alg_name, 0);

net/ipv6/anycast.c

@@ -308,7 +308,7 @@ int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr)
 	 *	not found: create a new one.
 	 */
 
-	aca = kmalloc(sizeof(struct ifacaddr6), GFP_ATOMIC);
+	aca = kzalloc(sizeof(struct ifacaddr6), GFP_ATOMIC);
 
 	if (aca == NULL) {
 		err = -ENOMEM;
@@ -322,8 +322,6 @@ int ipv6_dev_ac_inc(struct net_device *dev, struct in6_addr *addr)
 		goto out;
 	}
 
-	memset(aca, 0, sizeof(struct ifacaddr6));
-
 	ipv6_addr_copy(&aca->aca_addr, addr);
 	aca->aca_idev = idev;
 	aca->aca_rt = rt;
@@ -550,7 +548,7 @@ static int ac6_seq_open(struct inode *inode, struct file *file)
 {
 	struct seq_file *seq;
 	int rc = -ENOMEM;
-	struct ac6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
+	struct ac6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
 
 	if (!s)
 		goto out;
@@ -561,7 +559,6 @@ static int ac6_seq_open(struct inode *inode, struct file *file)
 
 	seq = file->private_data;
 	seq->private = s;
-	memset(s, 0, sizeof(*s));
 out:
 	return rc;
 out_kfree:

net/ipv6/esp6.c

@@ -305,12 +305,10 @@ static int esp6_init_state(struct xfrm_state *x)
 	if (x->encap)
 		goto error;
 
-	esp = kmalloc(sizeof(*esp), GFP_KERNEL);
+	esp = kzalloc(sizeof(*esp), GFP_KERNEL);
 	if (esp == NULL)
 		return -ENOMEM;
 
-	memset(esp, 0, sizeof(*esp));
-
 	if (x->aalg) {
 		struct xfrm_algo_desc *aalg_desc;
 

net/ipv6/ip6_flowlabel.c

@@ -287,10 +287,9 @@ fl_create(struct in6_flowlabel_req *freq, char __user *optval, int optlen, int *
 	int err;
 
 	err = -ENOMEM;
-	fl = kmalloc(sizeof(*fl), GFP_KERNEL);
+	fl = kzalloc(sizeof(*fl), GFP_KERNEL);
 	if (fl == NULL)
 		goto done;
-	memset(fl, 0, sizeof(*fl));
 
 	olen = optlen - CMSG_ALIGN(sizeof(*freq));
 	if (olen > 0) {
@@ -663,7 +662,7 @@ static int ip6fl_seq_open(struct inode *inode, struct file *file)
 {
 	struct seq_file *seq;
 	int rc = -ENOMEM;
-	struct ip6fl_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
+	struct ip6fl_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
 
 	if (!s)
 		goto out;
@@ -674,7 +673,6 @@ static int ip6fl_seq_open(struct inode *inode, struct file *file)
 
 	seq = file->private_data;
 	seq->private = s;
-	memset(s, 0, sizeof(*s));
 out:
 	return rc;
 out_kfree:

net/ipv6/ipcomp6.c

@@ -428,11 +428,10 @@ static int ipcomp6_init_state(struct xfrm_state *x)
 		goto out;
 
 	err = -ENOMEM;
-	ipcd = kmalloc(sizeof(*ipcd), GFP_KERNEL);
+	ipcd = kzalloc(sizeof(*ipcd), GFP_KERNEL);
 	if (!ipcd)
 		goto out;
 
-	memset(ipcd, 0, sizeof(*ipcd));
 	x->props.header_len = 0;
 	if (x->props.mode)
 		x->props.header_len += sizeof(struct ipv6hdr);

net/ipv6/mcast.c

@@ -767,10 +767,10 @@ static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
 	 * for deleted items allows change reports to use common code with
 	 * non-deleted or query-response MCA's.
 	 */
-	pmc = kmalloc(sizeof(*pmc), GFP_ATOMIC);
+	pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
 	if (!pmc)
 		return;
-	memset(pmc, 0, sizeof(*pmc));
+
 	spin_lock_bh(&im->mca_lock);
 	spin_lock_init(&pmc->mca_lock);
 	pmc->idev = im->idev;
@@ -893,15 +893,14 @@ int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr)
 	 *	not found: create a new one.
 	 */
 
-	mc = kmalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
+	mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
 
 	if (mc == NULL) {
 		write_unlock_bh(&idev->lock);
 		in6_dev_put(idev);
 		return -ENOMEM;
 	}
 
-	memset(mc, 0, sizeof(struct ifmcaddr6));
 	init_timer(&mc->mca_timer);
 	mc->mca_timer.function = igmp6_timer_handler;
 	mc->mca_timer.data = (unsigned long) mc;
@@ -1934,10 +1933,10 @@ static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
 		psf_prev = psf;
 	}
 	if (!psf) {
-		psf = kmalloc(sizeof(*psf), GFP_ATOMIC);
+		psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
 		if (!psf)
 			return -ENOBUFS;
-		memset(psf, 0, sizeof(*psf));
+
 		psf->sf_addr = *psfsrc;
 		if (psf_prev) {
 			psf_prev->sf_next = psf;
@@ -2431,7 +2430,7 @@ static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
 {
 	struct seq_file *seq;
 	int rc = -ENOMEM;
-	struct igmp6_mc_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
+	struct igmp6_mc_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
 
 	if (!s)
 		goto out;
@@ -2442,7 +2441,6 @@ static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
 
 	seq = file->private_data;
 	seq->private = s;
-	memset(s, 0, sizeof(*s));
 out:
 	return rc;
 out_kfree:
@@ -2606,7 +2604,7 @@ static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
 {
 	struct seq_file *seq;
 	int rc = -ENOMEM;
-	struct igmp6_mcf_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
+	struct igmp6_mcf_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
 
 	if (!s)
 		goto out;
@@ -2617,7 +2615,6 @@ static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
 
 	seq = file->private_data;
 	seq->private = s;
-	memset(s, 0, sizeof(*s));
 out:
 	return rc;
 out_kfree:

net/ipv6/raw.c

@@ -1198,15 +1198,14 @@ static int raw6_seq_open(struct inode *inode, struct file *file)
 {
 	struct seq_file *seq;
 	int rc = -ENOMEM;
-	struct raw6_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
+	struct raw6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
 	if (!s)
 		goto out;
 	rc = seq_open(file, &raw6_seq_ops);
 	if (rc)
 		goto out_kfree;
 	seq = file->private_data;
 	seq->private = s;
-	memset(s, 0, sizeof(*s));
 out:
 	return rc;
 out_kfree:

net/ipv6/route.c

@@ -1877,11 +1877,10 @@ int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
 		/*
 		 * 2. allocate and initialize walker.
 		 */
-		w = kmalloc(sizeof(*w), GFP_ATOMIC);
+		w = kzalloc(sizeof(*w), GFP_ATOMIC);
 		if (w == NULL)
 			return -ENOMEM;
 		RT6_TRACE("dump<%p", w);
-		memset(w, 0, sizeof(*w));
 		w->root = &ip6_routing_table;
 		w->func = fib6_dump_node;
 		w->args = &arg;