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| author | Alexey Izbyshev <izbyshev@ispras.ru> | 2023-05-08 19:03:46 +0300 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2024-02-29 10:14:16 -0500 |
| commit | 5c653ccaa1383db0c310abf66d5b6806e83ac18f (patch) | |
| tree | 8c5d33b578c0baa2aad021f8b178d3dd31d3e61d /src | |
| parent | d3a61059c04bd82329707324fac0d48e191edbf4 (diff) | |
| download | musl-5c653ccaa1383db0c310abf66d5b6806e83ac18f.tar.gz musl-5c653ccaa1383db0c310abf66d5b6806e83ac18f.tar.xz musl-5c653ccaa1383db0c310abf66d5b6806e83ac18f.zip | |
getnameinfo: fix calling __dns_parse with potentially too large rlen
__res_send returns the full answer length even if it didn't fit the buffer, but __dns_parse expects the length of the filled part of the buffer. This is analogous to commit 77327ed064bd57b0e1865cd0e0364057ff4a53b4, which fixed the only other __dns_parse call site.
Diffstat (limited to 'src')
| -rw-r--r-- | src/network/getnameinfo.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/network/getnameinfo.c b/src/network/getnameinfo.c index 7abe0fa9..133c15b3 100644 --- a/src/network/getnameinfo.c +++ b/src/network/getnameinfo.c @@ -162,8 +162,10 @@ int getnameinfo(const struct sockaddr *restrict sa, socklen_t sl, query[3] = 0; /* don't need AD flag */ int rlen = __res_send(query, qlen, reply, sizeof reply); buf[0] = 0; - if (rlen > 0) + if (rlen > 0) { + if (rlen > sizeof reply) rlen = sizeof reply; __dns_parse(reply, rlen, dns_parse_callback, buf); + } } if (!*buf) { if (flags & NI_NAMEREQD) return EAI_NONAME; |