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sdl->sdl_len in sockaddr_dl can be longer than

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sizeof(struct sockaddr_dl).
This commit is contained in:
Hiroki Sato 2015-11-03 00:46:06 +00:00
parent a096257482
commit c56e91b345
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=290318
1 changed files with 13 additions and 3 deletions
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16
lib/libc/net/getnameinfo.c
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@ -122,7 +122,8 @@ getnameinfo(const struct sockaddr *sa, socklen_t salen,
afd = find_afd(sa->sa_family);
if (afd == NULL)
return (EAI_FAMILY);
if (sa->sa_family == PF_LOCAL) {
switch (sa->sa_family) {
case PF_LOCAL:
/*
* PF_LOCAL uses variable sa->sa_len depending on the
* content length of sun_path. Require 1 byte in
@ -132,8 +133,17 @@ getnameinfo(const struct sockaddr *sa, socklen_t salen,
salen <= afd->a_socklen -
sizeofmember(struct sockaddr_un, sun_path))
return (EAI_FAIL);
} else if (salen != afd->a_socklen)
return (EAI_FAIL);
break;
case PF_LINK:
if (salen <= afd->a_socklen -
sizeofmember(struct sockaddr_dl, sdl_data))
return (EAI_FAIL);
break;
default:
if (salen != afd->a_socklen)
return (EAI_FAIL);
break;
}
return ((*afd->a_func)(afd, sa, salen, host, hostlen,
serv, servlen, flags));