diff options
| -rw-r--r-- | net/caif/cfpkt_skbuff.c | 25 | ||||
| -rw-r--r-- | net/caif/cfserl.c | 3 | ||||
| -rw-r--r-- | net/caif/cfsrvl.c | 6 |
3 files changed, 25 insertions, 9 deletions
diff --git a/net/caif/cfpkt_skbuff.c b/net/caif/cfpkt_skbuff.c index 83fff2ff6658..a6fdf899741a 100644 --- a/net/caif/cfpkt_skbuff.c +++ b/net/caif/cfpkt_skbuff.c @@ -238,6 +238,7 @@ int cfpkt_add_head(struct cfpkt *pkt, const void *data2, u16 len) struct sk_buff *lastskb; u8 *to; const u8 *data = data2; + int ret; if (unlikely(is_erronous(pkt))) return -EPROTO; if (unlikely(skb_headroom(skb) < len)) { @@ -246,9 +247,10 @@ int cfpkt_add_head(struct cfpkt *pkt, const void *data2, u16 len) } /* Make sure data is writable */ - if (unlikely(skb_cow_data(skb, 0, &lastskb) < 0)) { + ret = skb_cow_data(skb, 0, &lastskb); + if (unlikely(ret < 0)) { PKT_ERROR(pkt, "cfpkt_add_head: cow failed\n"); - return -EPROTO; + return ret; } to = skb_push(skb, len); @@ -316,6 +318,8 @@ EXPORT_SYMBOL(cfpkt_setlen); struct cfpkt *cfpkt_create_uplink(const unsigned char *data, unsigned int len) { struct cfpkt *pkt = cfpkt_create_pfx(len + PKT_POSTFIX, PKT_PREFIX); + if (!pkt) + return NULL; if (unlikely(data != NULL)) cfpkt_add_body(pkt, data, len); return pkt; @@ -344,12 +348,13 @@ struct cfpkt *cfpkt_append(struct cfpkt *dstpkt, if (dst->tail + neededtailspace > dst->end) { /* Create a dumplicate of 'dst' with more tail space */ + struct cfpkt *tmppkt; dstlen = skb_headlen(dst); createlen = dstlen + neededtailspace; - tmp = pkt_to_skb( - cfpkt_create(createlen + PKT_PREFIX + PKT_POSTFIX)); - if (!tmp) + tmppkt = cfpkt_create(createlen + PKT_PREFIX + PKT_POSTFIX); + if (tmppkt == NULL) return NULL; + tmp = pkt_to_skb(tmppkt); skb_set_tail_pointer(tmp, dstlen); tmp->len = dstlen; memcpy(tmp->data, dst->data, dstlen); @@ -368,6 +373,7 @@ struct cfpkt *cfpkt_split(struct cfpkt *pkt, u16 pos) { struct sk_buff *skb2; struct sk_buff *skb = pkt_to_skb(pkt); + struct cfpkt *tmppkt; u8 *split = skb->data + pos; u16 len2nd = skb_tail_pointer(skb) - split; @@ -381,9 +387,12 @@ struct cfpkt *cfpkt_split(struct cfpkt *pkt, u16 pos) } /* Create a new packet for the second part of the data */ - skb2 = pkt_to_skb( - cfpkt_create_pfx(len2nd + PKT_PREFIX + PKT_POSTFIX, - PKT_PREFIX)); + tmppkt = cfpkt_create_pfx(len2nd + PKT_PREFIX + PKT_POSTFIX, + PKT_PREFIX); + if (tmppkt == NULL) + return NULL; + skb2 = pkt_to_skb(tmppkt); + if (skb2 == NULL) return NULL; diff --git a/net/caif/cfserl.c b/net/caif/cfserl.c index 06029ea2da2f..cb4325a3dc83 100644 --- a/net/caif/cfserl.c +++ b/net/caif/cfserl.c @@ -67,6 +67,8 @@ static int cfserl_receive(struct cflayer *l, struct cfpkt *newpkt) layr->incomplete_frm = cfpkt_append(layr->incomplete_frm, newpkt, expectlen); pkt = layr->incomplete_frm; + if (pkt == NULL) + return -ENOMEM; } else { pkt = newpkt; } @@ -154,7 +156,6 @@ static int cfserl_receive(struct cflayer *l, struct cfpkt *newpkt) if (layr->usestx) { if (tail_pkt != NULL) pkt = cfpkt_append(pkt, tail_pkt, 0); - /* Start search for next STX if frame failed */ continue; } else { diff --git a/net/caif/cfsrvl.c b/net/caif/cfsrvl.c index aff31f34528f..6e5b7079a684 100644 --- a/net/caif/cfsrvl.c +++ b/net/caif/cfsrvl.c @@ -123,6 +123,12 @@ static int cfservl_modemcmd(struct cflayer *layr, enum caif_modemcmd ctrl) struct caif_payload_info *info; u8 flow_off = SRVL_FLOW_OFF; pkt = cfpkt_create(SRVL_CTRL_PKT_SIZE); + if (!pkt) { + pr_warning("CAIF: %s(): Out of memory\n", + __func__); + return -ENOMEM; + } + if (cfpkt_add_head(pkt, &flow_off, 1) < 0) { pr_err("CAIF: %s(): Packet is erroneous!\n", __func__); |