diff --git a/drivers/net/ppp/ppp_async.c b/drivers/net/ppp/ppp_async.c
index f14a9d190de9135308fc4f8f80f11bd3501b86c1..174a1bc841348a4c5c3f52c5ab13ffdc9697e4bb 100644
--- a/drivers/net/ppp/ppp_async.c
+++ b/drivers/net/ppp/ppp_async.c
@@ -548,7 +548,7 @@ ppp_async_encode(struct asyncppp *ap)
 	 * and 7 (code-reject) must be sent as though no options
 	 * had been negotiated.
 	 */
-	islcp = proto == PPP_LCP && 1 <= data[2] && data[2] <= 7;
+	islcp = proto == PPP_LCP && count >= 3 && 1 <= data[2] && data[2] <= 7;
 
 	if (i == 0) {
 		if (islcp)
diff --git a/drivers/net/slip/slhc.c b/drivers/net/slip/slhc.c
index f78ceba42e57e4564544b26e6701c6f0901cb3fa..603a29f3905bae5f3ad199372baa62ba914a281d 100644
--- a/drivers/net/slip/slhc.c
+++ b/drivers/net/slip/slhc.c
@@ -643,46 +643,57 @@ slhc_uncompress(struct slcompress *comp, unsigned char *icp, int isize)
 int
 slhc_remember(struct slcompress *comp, unsigned char *icp, int isize)
 {
-	struct cstate *cs;
-	unsigned ihl;
-
+	const struct tcphdr *th;
 	unsigned char index;
+	struct iphdr *iph;
+	struct cstate *cs;
+	unsigned int ihl;
 
-	if(isize < 20) {
-		/* The packet is shorter than a legal IP header */
+	/* The packet is shorter than a legal IP header.
+	 * Also make sure isize is positive.
+	 */
+	if (isize < (int)sizeof(struct iphdr)) {
+runt:
 		comp->sls_i_runt++;
-		return slhc_toss( comp );
+		return slhc_toss(comp);
 	}
+	iph = (struct iphdr *)icp;
 	/* Peek at the IP header's IHL field to find its length */
-	ihl = icp[0] & 0xf;
-	if(ihl < 20 / 4){
-		/* The IP header length field is too small */
-		comp->sls_i_runt++;
-		return slhc_toss( comp );
-	}
-	index = icp[9];
-	icp[9] = IPPROTO_TCP;
+	ihl = iph->ihl;
+	/* The IP header length field is too small,
+	 * or packet is shorter than the IP header followed
+	 * by minimal tcp header.
+	 */
+	if (ihl < 5 || isize < ihl * 4 + sizeof(struct tcphdr))
+		goto runt;
+
+	index = iph->protocol;
+	iph->protocol = IPPROTO_TCP;
 
 	if (ip_fast_csum(icp, ihl)) {
 		/* Bad IP header checksum; discard */
 		comp->sls_i_badcheck++;
-		return slhc_toss( comp );
+		return slhc_toss(comp);
 	}
-	if(index > comp->rslot_limit) {
+	if (index > comp->rslot_limit) {
 		comp->sls_i_error++;
 		return slhc_toss(comp);
 	}
-
+	th = (struct tcphdr *)(icp + ihl * 4);
+	if (th->doff < sizeof(struct tcphdr) / 4)
+		goto runt;
+	if (isize < ihl * 4 + th->doff * 4)
+		goto runt;
 	/* Update local state */
 	cs = &comp->rstate[comp->recv_current = index];
 	comp->flags &=~ SLF_TOSS;
-	memcpy(&cs->cs_ip,icp,20);
-	memcpy(&cs->cs_tcp,icp + ihl*4,20);
+	memcpy(&cs->cs_ip, iph, sizeof(*iph));
+	memcpy(&cs->cs_tcp, th, sizeof(*th));
 	if (ihl > 5)
-	  memcpy(cs->cs_ipopt, icp + sizeof(struct iphdr), (ihl - 5) * 4);
-	if (cs->cs_tcp.doff > 5)
-	  memcpy(cs->cs_tcpopt, icp + ihl*4 + sizeof(struct tcphdr), (cs->cs_tcp.doff - 5) * 4);
-	cs->cs_hsize = ihl*2 + cs->cs_tcp.doff*2;
+	  memcpy(cs->cs_ipopt, &iph[1], (ihl - 5) * 4);
+	if (th->doff > 5)
+	  memcpy(cs->cs_tcpopt, &th[1], (th->doff - 5) * 4);
+	cs->cs_hsize = ihl*2 + th->doff*2;
 	cs->initialized = true;
 	/* Put headers back on packet
 	 * Neither header checksum is recalculated
diff --git a/fs/exfat/balloc.c b/fs/exfat/balloc.c
index 258b6bb5762a478b650f572780a2c742e69f1e5b..702187cea05de8b885b216767289756875e5d21c 100644
--- a/fs/exfat/balloc.c
+++ b/fs/exfat/balloc.c
@@ -110,11 +110,8 @@ int exfat_load_bitmap(struct super_block *sb)
 				return -EIO;
 
 			type = exfat_get_entry_type(ep);
-			if (type == TYPE_UNUSED)
-				break;
-			if (type != TYPE_BITMAP)
-				continue;
-			if (ep->dentry.bitmap.flags == 0x0) {
+			if (type == TYPE_BITMAP &&
+			    ep->dentry.bitmap.flags == 0x0) {
 				int err;
 
 				err = exfat_allocate_bitmap(sb, ep);
@@ -122,6 +119,9 @@ int exfat_load_bitmap(struct super_block *sb)
 				return err;
 			}
 			brelse(bh);
+
+			if (type == TYPE_UNUSED)
+				return -EINVAL;
 		}
 
 		if (exfat_get_next_cluster(sb, &clu.dir))
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index b0ea646454ac83bfdc8b73a92dd82dea7302e964..59290356aa5b1d66327f6cc93b6a97d4fc9aaa3a 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -663,8 +663,8 @@ int ext4_ind_migrate(struct inode *inode)
 	if (unlikely(ret2 && !ret))
 		ret = ret2;
 errout:
-	ext4_journal_stop(handle);
 	up_write(&EXT4_I(inode)->i_data_sem);
+	ext4_journal_stop(handle);
 out_unlock:
 	percpu_up_write(&sbi->s_writepages_rwsem);
 	return ret;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index cec71e78f345ca4707e435cc63c465a4631bd3f9..dc4745e668c947442cc9e56f7f280381b58564f5 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1938,7 +1938,7 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 		split = count/2;
 
 	hash2 = map[split].hash;
-	continued = hash2 == map[split - 1].hash;
+	continued = split > 0 ? hash2 == map[split - 1].hash : 0;
 	dxtrace(printk(KERN_INFO "Split block %lu at %x, %i/%i\n",
 			(unsigned long)dx_get_block(frame->at),
 					hash2, split, count-split));
diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
index 646fb512bd1e7b34208635251deb401ae64be7cb..0d3c55c585088ac54390331e6df451722c9bb9d1 100644
--- a/fs/jbd2/checkpoint.c
+++ b/fs/jbd2/checkpoint.c
@@ -137,8 +137,11 @@ __releases(&journal->j_state_lock)
 			write_unlock(&journal->j_state_lock);
 			if (chkpt) {
 				jbd2_log_do_checkpoint(journal);
-			} else if (jbd2_cleanup_journal_tail(journal) == 0) {
-				/* We were able to recover space; yay! */
+			} else if (jbd2_cleanup_journal_tail(journal) <= 0) {
+				/*
+				 * We were able to recover space or the
+				 * journal was aborted due to an error.
+				 */
 				;
 			} else if (tid) {
 				/*
diff --git a/include/net/sock.h b/include/net/sock.h
index 0104e4d2fdd26f76f647341726b3d614af46970b..29c7fa943e6096c7a9ac27811f5d9c158863d36a 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -840,6 +840,8 @@ static inline void sk_add_bind_node(struct sock *sk,
 	hlist_for_each_entry_safe(__sk, tmp, list, sk_node)
 #define sk_for_each_bound(__sk, list) \
 	hlist_for_each_entry(__sk, list, sk_bind_node)
+#define sk_for_each_bound_safe(__sk, tmp, list) \
+	hlist_for_each_entry_safe(__sk, tmp, list, sk_bind_node)
 
 /**
  * sk_for_each_entry_offset_rcu - iterate over a list at a given struct offset
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 826a2355da1ed13cee9a14433c83c79afb13b6cb..2691abca4f0ec2f5a1336bec8120fc77f6186fc0 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1497,7 +1497,7 @@ static struct xol_area *__create_xol_area(unsigned long vaddr)
 	area->xol_mapping.name = "[uprobes]";
 	area->xol_mapping.fault = NULL;
 	area->xol_mapping.pages = area->pages;
-	area->pages[0] = alloc_page(GFP_HIGHUSER);
+	area->pages[0] = alloc_page(GFP_HIGHUSER | __GFP_ZERO);
 	if (!area->pages[0])
 		goto free_bitmap;
 	area->pages[1] = NULL;
diff --git a/net/core/dev.c b/net/core/dev.c
index db2e8e870d077b3cb71669a63821b8669b59a0e2..04d37ea7cc4d5f6ba581a812b8241ef6a8cfe215 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3755,10 +3755,14 @@ static void qdisc_pkt_len_init(struct sk_buff *skb)
 				hdr_len += sizeof(struct udphdr);
 		}
 
-		if (shinfo->gso_type & SKB_GSO_DODGY)
-			gso_segs = DIV_ROUND_UP(skb->len - hdr_len,
-						shinfo->gso_size);
+		if (unlikely(shinfo->gso_type & SKB_GSO_DODGY)) {
+			int payload = skb->len - hdr_len;
 
+			/* Malicious packet. */
+			if (payload <= 0)
+				return;
+			gso_segs = DIV_ROUND_UP(payload, shinfo->gso_size);
+		}
 		qdisc_skb_cb(skb)->pkt_len += (gso_segs - 1) * hdr_len;
 	}
 }
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index e666158d99f4c0ff608871a99659bebc226ad36f..e252e8d72ee46b6706e1c082809fd604218817fc 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -2172,8 +2172,9 @@ void __netlink_clear_multicast_users(struct sock *ksk, unsigned int group)
 {
 	struct sock *sk;
 	struct netlink_table *tbl = &nl_table[ksk->sk_protocol];
+	struct hlist_node *tmp;
 
-	sk_for_each_bound(sk, &tbl->mc_list)
+	sk_for_each_bound_safe(sk, tmp, &tbl->mc_list)
 		netlink_update_socket_mc(nlk_sk(sk), group, 0);
 }