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Add a missing m_pullup() before a mtod() in in_arpinput().

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PR: kern/22177
Reviewed by: wollman
This commit is contained in:
Yaroslav Tykhiy 2001-03-27 12:34:58 +00:00
parent aa7664372f
commit 4cbc8ad1bb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=74851
1 changed files with 6 additions and 0 deletions
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6
sys/netinet/if_ether.c
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@ -519,6 +519,12 @@ in_arpinput(m)
struct in_addr isaddr, itaddr, myaddr;
int op, rif_len;
if (m->m_len < sizeof(struct ether_arp) &&
(m = m_pullup(m, sizeof(struct ether_arp))) == NULL) {
log(LOG_ERR, "in_arp: runt packet -- m_pullup failed\n");
return;
}
ea = mtod(m, struct ether_arp *);
op = ntohs(ea->arp_op);
(void)memcpy(&isaddr, ea->arp_spa, sizeof (isaddr));