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| author | Ulrich Drepper <drepper@redhat.com> | 2010-04-09 21:38:20 -0700 |
|---|---|---|
| committer | Petr Baudis <pasky@ucw.cz> | 2010-05-12 03:21:17 +0200 |
| commit | 39879d17a46e063c674ecf5532cb8c1f49fc7277 (patch) | |
| tree | 3b8faed42a022c2380908d03deb220cd1dffcb17 | |
| parent | 1aa9c16a2a1b297b31793b99cc3d5d67e720edb2 (diff) | |
| download | glibc-39879d17a46e063c674ecf5532cb8c1f49fc7277.zip glibc-39879d17a46e063c674ecf5532cb8c1f49fc7277.tar.gz glibc-39879d17a46e063c674ecf5532cb8c1f49fc7277.tar.bz2 | |
Fix crash on reloading of gai data in nscd.
(cherry picked from commit ea42a20caed5b343ff20a0d4622ae6c17b77161b)
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | nscd/aicache.c | 10 | ||||
| -rw-r--r-- | resolv/nss_dns/dns-host.c | 16 |
3 files changed, 16 insertions, 18 deletions
@@ -1,3 +1,11 @@ +2010-04-09 Ulrich Drepper <drepper@redhat.com> + + * nscd/aicache.c (addhstaiX): Correct passing memory to address + list to gethostbyname4_r functions. + + * resolv/nss_dns/dns-host.c (gaih_getanswer_slice): Optimize + copying of h_name. + 2010-04-07 Andreas Schwab <schwab@redhat.com> * sysdeps/unix/sysv/linux/i386/fallocate.c: Set errno on error. diff --git a/nscd/aicache.c b/nscd/aicache.c index 992357d..3cb2208 100644 --- a/nscd/aicache.c +++ b/nscd/aicache.c @@ -1,5 +1,5 @@ /* Cache handling for host lookup. - Copyright (C) 2004-2008, 2009 Free Software Foundation, Inc. + Copyright (C) 2004-2008, 2009, 2010 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2004. @@ -111,7 +111,7 @@ addhstaiX (struct database_dyn *db, int fd, request_header *req, int old_res_options = _res.options; _res.options &= ~RES_USE_INET6; - size_t tmpbuf6len = 512; + size_t tmpbuf6len = 1024; char *tmpbuf6 = alloca (tmpbuf6len); size_t tmpbuf4len = 0; char *tmpbuf4 = NULL; @@ -133,9 +133,11 @@ addhstaiX (struct database_dyn *db, int fd, request_header *req, "gethostbyname4_r"); if (fct4 != NULL) { - struct gaih_addrtuple *at = NULL; + struct gaih_addrtuple atmem; + struct gaih_addrtuple *at; while (1) { + at = &atmem; rc6 = 0; herrno = 0; status[1] = DL_CALL_FCT (fct4, (key, &at, tmpbuf6, tmpbuf6len, @@ -153,7 +155,7 @@ addhstaiX (struct database_dyn *db, int fd, request_header *req, goto next_nip; /* We found the data. Count the addresses and the size. */ - for (const struct gaih_addrtuple *at2 = at; at2 != NULL; + for (const struct gaih_addrtuple *at2 = at = &atmem; at2 != NULL; at2 = at2->next) { ++naddrs; diff --git a/resolv/nss_dns/dns-host.c b/resolv/nss_dns/dns-host.c index e0c4978..8592183 100644 --- a/resolv/nss_dns/dns-host.c +++ b/resolv/nss_dns/dns-host.c @@ -1050,7 +1050,7 @@ gaih_getanswer_slice (const querybuf *answer, int anslen, const char *qname, ++had_error; continue; } - if (*firstp) + if (*firstp && canon == NULL) { h_name = buffer; buffer += h_namelen; @@ -1166,19 +1166,7 @@ gaih_getanswer_slice (const querybuf *answer, int anslen, const char *qname, if (ttl != 0 && ttlp != NULL) *ttlp = ttl; - if (canon != NULL) - { - (*pat)->name = canon; - - /* Reclaim buffer space. */ - if (h_name + h_namelen == buffer) - { - buffer = h_name; - buflen += h_namelen; - } - } - else - (*pat)->name = h_name; + (*pat)->name = canon ?: h_name; *firstp = 0; } |