| Message ID | 1476171207-18472-1-git-send-email-zhangchen.fnst@cn.fujitsu.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 10/11/2016 02:33 AM, Zhang Chen wrote: > Fix memory leak in colo-compare.c and filter-rewriter.c > Report by Coverity. This part is fine. > > v2: > - use traces instead of fprintf in colo-compare.c > > v1: > - initial patch ...but this part should live... > > Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> > --- ...here, after the --- separator, where 'git am' will ignore it. It is useful information to list readers, but will make no sense in qemu.git history a year from now (we don't care how many versions it took to get to the version that was committed). The maintainer can fix it, so by itself, that's not a reason to send a v3. > net/colo-compare.c | 11 +++-------- > net/filter-rewriter.c | 17 +++++------------ > trace-events | 1 + > 3 files changed, 9 insertions(+), 20 deletions(-) > > @@ -219,11 +218,9 @@ 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, > + trace_colo_compare_pkt_info(__func__, net/filter-rewriter.c is the only file that currently uses trace_...(__func__), that's because the trace mechanism itself already expands the trace_* call to something with enough context that manually adding __func__ just gives redundant information. I'd rather see __func__ removed from the trace call. > + inet_ntoa(ppkt->ip->ip_src), > + inet_ntoa(ppkt->ip->ip_dst), > (unsigned int)ntohl(ptcp->th_seq), > (unsigned int)ntohl(ptcp->th_ack), > (unsigned int)ntohl(stcp->th_seq), Are these casts still needed? > +++ b/trace-events > @@ -149,6 +149,7 @@ 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 *func, 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) "%s: src/dst: %s/%s p: seq/ack=%u/%u s: seq/ack=%u/%u res=%d flags=%x/%x\n" Again, the 'const char *func' portion is not needed. Looking forward to v3.
On 10/11/2016 10:32 PM, Eric Blake wrote: > On 10/11/2016 02:33 AM, Zhang Chen wrote: >> Fix memory leak in colo-compare.c and filter-rewriter.c >> Report by Coverity. > This part is fine. > >> v2: >> - use traces instead of fprintf in colo-compare.c >> >> v1: >> - initial patch > ...but this part should live... > >> Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> >> --- > ...here, after the --- separator, where 'git am' will ignore it. It is > useful information to list readers, but will make no sense in qemu.git > history a year from now (we don't care how many versions it took to get > to the version that was committed). The maintainer can fix it, so by > itself, that's not a reason to send a v3. OK, I will remove the version info. > >> net/colo-compare.c | 11 +++-------- >> net/filter-rewriter.c | 17 +++++------------ >> trace-events | 1 + >> 3 files changed, 9 insertions(+), 20 deletions(-) >> >> @@ -219,11 +218,9 @@ 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, >> + trace_colo_compare_pkt_info(__func__, > net/filter-rewriter.c is the only file that currently uses > trace_...(__func__), that's because the trace mechanism itself already > expands the trace_* call to something with enough context that manually > adding __func__ just gives redundant information. I'd rather see > __func__ removed from the trace call. I will remove the __func__ in next version. > >> + inet_ntoa(ppkt->ip->ip_src), >> + inet_ntoa(ppkt->ip->ip_dst), >> (unsigned int)ntohl(ptcp->th_seq), >> (unsigned int)ntohl(ptcp->th_ack), >> (unsigned int)ntohl(stcp->th_seq), > Are these casts still needed? will fix it. >> +++ b/trace-events >> @@ -149,6 +149,7 @@ 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 *func, 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) "%s: src/dst: %s/%s p: seq/ack=%u/%u s: seq/ack=%u/%u res=%d flags=%x/%x\n" > Again, the 'const char *func' portion is not needed. > > Looking forward to v3. OK, I will send v3 later Thanks Zhang Chen
diff --git a/net/colo-compare.c b/net/colo-compare.c index 22b1da1..bbb6ca6 100644 --- a/net/colo-compare.c +++ b/net/colo-compare.c @@ -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) { @@ -219,11 +218,9 @@ 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, + trace_colo_compare_pkt_info(__func__, + inet_ntoa(ppkt->ip->ip_src), + inet_ntoa(ppkt->ip->ip_dst), (unsigned int)ntohl(ptcp->th_seq), (unsigned int)ntohl(ptcp->th_ack), (unsigned int)ntohl(stcp->th_seq), @@ -235,8 +232,6 @@ static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt) fprintf(stderr, "Secondary len = %d\n", spkt->size); qemu_hexdump((char *)spkt->data, stderr, "colo-compare", spkt->size); - g_free(sdebug); - g_free(ddebug); } return res; diff --git a/net/filter-rewriter.c b/net/filter-rewriter.c index 89abe72..c4ab91c 100644 --- a/net/filter-rewriter.c +++ b/net/filter-rewriter.c @@ -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)) { @@ -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))) { @@ -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 diff --git a/trace-events b/trace-events index 1cb9d37..8115430 100644 --- a/trace-events +++ b/trace-events @@ -149,6 +149,7 @@ 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 *func, 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) "%s: src/dst: %s/%s p: seq/ack=%u/%u s: seq/ack=%u/%u res=%d flags=%x/%x\n" # net/filter-rewriter.c colo_filter_rewriter_debug(void) ""
Fix memory leak in colo-compare.c and filter-rewriter.c Report by Coverity. v2: - use traces instead of fprintf in colo-compare.c v1: - initial patch Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> --- net/colo-compare.c | 11 +++-------- net/filter-rewriter.c | 17 +++++------------ trace-events | 1 + 3 files changed, 9 insertions(+), 20 deletions(-)