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In a struct sockaddr, sa->sa_len can be zero if uninitialized.

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Make sure that this doesn't cause a problem when parsing.
This commit is contained in:
Archie Cobbs 2000-08-09 23:57:44 +00:00
parent 1bf6f71909
commit 1baeddb81b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=64470
1 changed files with 1 additions and 1 deletions
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sys/netgraph/ng_ksocket.c
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@ -149,7 +149,7 @@ ng_parse_generic_sockdata_getLength(const struct ng_parse_type *type,
const struct sockaddr *sa;
sa = (const struct sockaddr *)(buf - SADATA_OFFSET);
return sa->sa_len - SADATA_OFFSET;
return (sa->sa_len < SADATA_OFFSET) ? 0 : sa->sa_len - SADATA_OFFSET;
}
/* Type for the variable length data portion of a generic struct sockaddr */