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colo-proxy: fix memory leak
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Fix memory leak in colo-compare.c and filter-rewriter.c
Report by Coverity and add some comments.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Reviewed-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
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@zhangckid @jasowang
zhangckid authored and jasowang committed Oct 26, 2016
1 parent c7c3591 commit 2061c14
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Showing 3 changed files with 21 additions and 31 deletions.
34 changes: 15 additions & 19 deletions net/colo-compare.c
View file
Expand Up @@ -188,7 +188,6 @@ static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt)
{
struct tcphdr *ptcp, *stcp;
int res;
char *sdebug, *ddebug;

trace_colo_compare_main("compare tcp");
if (ppkt->size != spkt->size) {
Expand Down Expand Up @@ -219,24 +218,21 @@ static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt)
(spkt->size - ETH_HLEN));

if (res != 0 && trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) {
sdebug = strdup(inet_ntoa(ppkt->ip->ip_src));
ddebug = strdup(inet_ntoa(ppkt->ip->ip_dst));
fprintf(stderr, "%s: src/dst: %s/%s p: seq/ack=%u/%u"
" s: seq/ack=%u/%u res=%d flags=%x/%x\n",
__func__, sdebug, ddebug,
(unsigned int)ntohl(ptcp->th_seq),
(unsigned int)ntohl(ptcp->th_ack),
(unsigned int)ntohl(stcp->th_seq),
(unsigned int)ntohl(stcp->th_ack),
res, ptcp->th_flags, stcp->th_flags);

fprintf(stderr, "Primary len = %d\n", ppkt->size);
qemu_hexdump((char *)ppkt->data, stderr, "colo-compare", ppkt->size);
fprintf(stderr, "Secondary len = %d\n", spkt->size);
qemu_hexdump((char *)spkt->data, stderr, "colo-compare", spkt->size);

g_free(sdebug);
g_free(ddebug);
trace_colo_compare_pkt_info(inet_ntoa(ppkt->ip->ip_src),
inet_ntoa(ppkt->ip->ip_dst),
ntohl(ptcp->th_seq),
ntohl(ptcp->th_ack),
ntohl(stcp->th_seq),
ntohl(stcp->th_ack),
res, ptcp->th_flags,
stcp->th_flags,
ppkt->size,
spkt->size);

qemu_hexdump((char *)ppkt->data, stderr,
"colo-compare ppkt", ppkt->size);
qemu_hexdump((char *)spkt->data, stderr,
"colo-compare spkt", spkt->size);
}

return res;
Expand Down
17 changes: 5 additions & 12 deletions net/filter-rewriter.c
View file
Expand Up @@ -68,15 +68,11 @@ static int handle_primary_tcp_pkt(NetFilterState *nf,

tcp_pkt = (struct tcphdr *)pkt->transport_header;
if (trace_event_get_state(TRACE_COLO_FILTER_REWRITER_DEBUG)) {
char *sdebug, *ddebug;
sdebug = strdup(inet_ntoa(pkt->ip->ip_src));
ddebug = strdup(inet_ntoa(pkt->ip->ip_dst));
trace_colo_filter_rewriter_pkt_info(__func__, sdebug, ddebug,
trace_colo_filter_rewriter_pkt_info(__func__,
inet_ntoa(pkt->ip->ip_src), inet_ntoa(pkt->ip->ip_dst),
ntohl(tcp_pkt->th_seq), ntohl(tcp_pkt->th_ack),
tcp_pkt->th_flags);
trace_colo_filter_rewriter_conn_offset(conn->offset);
g_free(sdebug);
g_free(ddebug);
}

if (((tcp_pkt->th_flags & (TH_ACK | TH_SYN)) == TH_SYN)) {
Expand Down Expand Up @@ -116,15 +112,11 @@ static int handle_secondary_tcp_pkt(NetFilterState *nf,
tcp_pkt = (struct tcphdr *)pkt->transport_header;

if (trace_event_get_state(TRACE_COLO_FILTER_REWRITER_DEBUG)) {
char *sdebug, *ddebug;
sdebug = strdup(inet_ntoa(pkt->ip->ip_src));
ddebug = strdup(inet_ntoa(pkt->ip->ip_dst));
trace_colo_filter_rewriter_pkt_info(__func__, sdebug, ddebug,
trace_colo_filter_rewriter_pkt_info(__func__,
inet_ntoa(pkt->ip->ip_src), inet_ntoa(pkt->ip->ip_dst),
ntohl(tcp_pkt->th_seq), ntohl(tcp_pkt->th_ack),
tcp_pkt->th_flags);
trace_colo_filter_rewriter_conn_offset(conn->offset);
g_free(sdebug);
g_free(ddebug);
}

if (((tcp_pkt->th_flags & (TH_ACK | TH_SYN)) == (TH_ACK | TH_SYN))) {
Expand Down Expand Up @@ -162,6 +154,7 @@ static ssize_t colo_rewriter_receive_iov(NetFilterState *nf,

iov_to_buf(iov, iovcnt, 0, buf, size);
pkt = packet_new(buf, size);
g_free(buf);

/*
* if we get tcp packet
Expand Down
1 change: 1 addition & 0 deletions net/trace-events
View file
Expand Up @@ -13,6 +13,7 @@ colo_compare_icmp_miscompare(const char *sta, int size) ": %s = %d"
colo_compare_ip_info(int psize, const char *sta, const char *stb, int ssize, const char *stc, const char *std) "ppkt size = %d, ip_src = %s, ip_dst = %s, spkt size = %d, ip_src = %s, ip_dst = %s"
colo_old_packet_check_found(int64_t old_time) "%" PRId64
colo_compare_miscompare(void) ""
colo_compare_pkt_info(const char *src, const char *dst, uint32_t pseq, uint32_t pack, uint32_t sseq, uint32_t sack, int res, uint32_t pflag, uint32_t sflag, int psize, int ssize) "src/dst: %s/%s p: seq/ack=%u/%u s: seq/ack=%u/%u res=%d flags=%x/%x ppkt_size: %d spkt_size: %d\n"

# net/filter-rewriter.c
colo_filter_rewriter_debug(void) ""
Expand Down

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