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| author | Denis Vlasenko | 2008-04-29 12:31:53 +0000 |
|---|---|---|
| committer | Denis Vlasenko | 2008-04-29 12:31:53 +0000 |
| commit | b34266b42b5f6f78b7346c9ca90caebcd59db345 (patch) | |
| tree | 4e040efe40ba8f35415eb4d3f4bf64ca20274956 | |
| parent | a0c103a30a96e20794630c5daa4aad5926a151f2 (diff) | |
| download | busybox-b34266b42b5f6f78b7346c9ca90caebcd59db345.zip busybox-b34266b42b5f6f78b7346c9ca90caebcd59db345.tar.gz | |
ping: dont leak uninitialized data in ping packets
function old new delta
sendping4 176 186 +10
sendping6 93 100 +7
| -rw-r--r-- | networking/ping.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/networking/ping.c b/networking/ping.c index 2991486..c3a7107 100644 --- a/networking/ping.c +++ b/networking/ping.c @@ -372,9 +372,10 @@ static void sendping4(int junk ATTRIBUTE_UNUSED) * *after* packet. Saves one if() */ struct icmp *pkt = alloca(datalen + ICMP_MINLEN + 4); + memset(pkt, 0, datalen + ICMP_MINLEN + 4); pkt->icmp_type = ICMP_ECHO; - pkt->icmp_code = 0; - pkt->icmp_cksum = 0; + /*pkt->icmp_code = 0;*/ + /*pkt->icmp_cksum = 0;*/ pkt->icmp_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */ pkt->icmp_id = myid; @@ -391,9 +392,10 @@ static void sendping6(int junk ATTRIBUTE_UNUSED) { struct icmp6_hdr *pkt = alloca(datalen + sizeof(struct icmp6_hdr) + 4); + memset(pkt, 0, datalen + sizeof(struct icmp6_hdr) + 4); pkt->icmp6_type = ICMP6_ECHO_REQUEST; - pkt->icmp6_code = 0; - pkt->icmp6_cksum = 0; + /*pkt->icmp6_code = 0;*/ + /*pkt->icmp6_cksum = 0;*/ pkt->icmp6_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */ pkt->icmp6_id = myid; |