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Merge pull request #6160 from qlyoung/fix-pim-bsm-negative-shift

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pimd: fix negative bitshift in BSM code
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David Lamparter 2020-04-06 20:26:13 +02:00 committed by GitHub
commit 6b1d9f37ec
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1 changed files with 7 additions and 0 deletions
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pimd/pim_bsm.c
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@ -1282,6 +1282,13 @@ int pim_bsm_process(struct interface *ifp, struct ip *ip_hdr, uint8_t *buf,
bshdr = (struct bsm_hdr *)(buf + PIM_MSG_HEADER_LEN);
pim_inet4_dump("<bsr?>", bshdr->bsr_addr.addr, bsr_str,
sizeof(bsr_str));
if (bshdr->hm_len > 32) {
zlog_warn("Bad hashmask length for IPv4; got %" PRIu8
", expected value in range 0-32",
bshdr->hm_len);
pim->bsm_dropped++;
return -1;
}
pim->global_scope.hashMasklen = bshdr->hm_len;
frag_tag = ntohs(bshdr->frag_tag);