diff options
| -rw-r--r-- | ChangeLog | 14 | ||||
| -rw-r--r-- | nis/nss_nis/nis-hosts.c | 20 | ||||
| -rw-r--r-- | resolv/nss_dns/dns-host.c | 15 | ||||
| -rw-r--r-- | resolv/nss_dns/dns-network.c | 43 |
4 files changed, 69 insertions, 23 deletions
diff --git a/ChangeLog b/ChangeLog index 40595331bc..2e5f9d0a56 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,19 @@ 2007-04-23 Jakub Jelinek <jakub@redhat.com> + [BZ #4381] + * nss/nss_files/files-hosts.c (HOST_DB_LOOKUP): Ensure sufficient + alignment of buffer and tmp_buffer. + * nis/nss_nis/nis-hosts.c (internal_nis_gethostent_r, + internal_gethostbyname2_r, _nss_nis_gethostbyaddr_r): Ensure sufficient + alignment of buffer. + * resolv/nss_dns/dns-hosts.c (getanswer_r): Likewise. Handle buflen + bigger than INT_MAX. + * resolv/nss_dns/dns-network.c (getanswer_r): Likewise. Add errnop and + h_errnop arguments. Fail if buflen is too small. + (_nss_dns_getnetbyname_r, _nss_dns_getnetbyaddr_r): Adjust callers. + +2007-04-23 Jakub Jelinek <jakub@redhat.com> + [BZ #4405] * iconvdata/gconv-modules (E13B): Add a missing slash to the alias name. Patch by Aurelien Jarno <aurelien@aurel32.net>. diff --git a/nis/nss_nis/nis-hosts.c b/nis/nss_nis/nis-hosts.c index 4fa0361681..bde0a3291f 100644 --- a/nis/nss_nis/nis-hosts.c +++ b/nis/nss_nis/nis-hosts.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1996-2000, 2002, 2003, 2006 Free Software Foundation, Inc. +/* Copyright (C) 1996-2000, 2002, 2003, 2006, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996. @@ -134,13 +134,17 @@ internal_nis_gethostent_r (struct hostent *host, char *buffer, if (__builtin_expect (yp_get_default_domain (&domain), 0)) return NSS_STATUS_UNAVAIL; + uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data); + buffer += pad; + struct parser_data *data = (void *) buffer; - if (__builtin_expect (buflen < sizeof *data + 1, 0)) + if (__builtin_expect (buflen < sizeof *data + 1 + pad, 0)) { *errnop = ERANGE; *h_errnop = NETDB_INTERNAL; return NSS_STATUS_TRYAGAIN; } + buflen -= pad; /* Get the next entry until we found a correct one. */ const size_t linebuflen = buffer + buflen - data->linebuffer; @@ -234,6 +238,9 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host, char *buffer, size_t buflen, int *errnop, int *h_errnop, int flags) { + uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data); + buffer += pad; + struct parser_data *data = (void *) buffer; if (name == NULL) @@ -246,12 +253,13 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host, if (yp_get_default_domain (&domain)) return NSS_STATUS_UNAVAIL; - if (buflen < sizeof *data + 1) + if (buflen < sizeof *data + 1 + pad) { *h_errnop = NETDB_INTERNAL; *errnop = ERANGE; return NSS_STATUS_TRYAGAIN; } + buflen -= pad; /* Convert name to lowercase. */ size_t namlen = strlen (name); @@ -352,13 +360,17 @@ _nss_nis_gethostbyaddr_r (const void *addr, socklen_t addrlen, int af, if (__builtin_expect (yp_get_default_domain (&domain), 0)) return NSS_STATUS_UNAVAIL; + uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data); + buffer += pad; + struct parser_data *data = (void *) buffer; - if (__builtin_expect (buflen < sizeof *data + 1, 0)) + if (__builtin_expect (buflen < sizeof *data + 1 + pad, 0)) { *errnop = ERANGE; *h_errnop = NETDB_INTERNAL; return NSS_STATUS_TRYAGAIN; } + buflen -= pad; char *buf = inet_ntoa (*(const struct in_addr *) addr); diff --git a/resolv/nss_dns/dns-host.c b/resolv/nss_dns/dns-host.c index 7045c5915b..cf060be8ef 100644 --- a/resolv/nss_dns/dns-host.c +++ b/resolv/nss_dns/dns-host.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1996-2003, 2004 Free Software Foundation, Inc. +/* Copyright (C) 1996-2003, 2004, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Extended from original form by Ulrich Drepper <drepper@cygnus.com>, 1996. @@ -465,8 +465,8 @@ getanswer_r (const querybuf *answer, int anslen, const char *qname, int qtype, char *aliases[MAX_NR_ALIASES]; unsigned char host_addr[16]; /* IPv4 or IPv6 */ char *h_addr_ptrs[0]; - } *host_data = (struct host_data *) buffer; - int linebuflen = buflen - sizeof (struct host_data); + } *host_data; + int linebuflen; register const HEADER *hp; const u_char *end_of_message, *cp; int n, ancount, qdcount; @@ -478,8 +478,9 @@ getanswer_r (const querybuf *answer, int anslen, const char *qname, int qtype, u_char packtmp[NS_MAXCDNAME]; int have_to_map = 0; int32_t ttl = 0; - - if (__builtin_expect (linebuflen, 0) < 0) + uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct host_data); + buffer += pad; + if (__builtin_expect (buflen < sizeof (struct host_data) + pad, 0)) { /* The buffer is too small. */ too_small: @@ -487,6 +488,10 @@ getanswer_r (const querybuf *answer, int anslen, const char *qname, int qtype, *h_errnop = NETDB_INTERNAL; return NSS_STATUS_TRYAGAIN; } + host_data = (struct host_data *) buffer; + linebuflen = buflen - sizeof (struct host_data); + if (buflen - sizeof (struct host_data) != linebuflen) + linebuflen = INT_MAX; tname = qname; result->h_name = NULL; diff --git a/resolv/nss_dns/dns-network.c b/resolv/nss_dns/dns-network.c index 97d9263895..4552b5b678 100644 --- a/resolv/nss_dns/dns-network.c +++ b/resolv/nss_dns/dns-network.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1996, 1997, 1998, 1999, 2002, 2004 +/* Copyright (C) 1996, 1997, 1998, 1999, 2002, 2004, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Extended from original form by Ulrich Drepper <drepper@cygnus.com>, 1996. @@ -102,7 +102,8 @@ extern int __ns_name_unpack (const u_char *, const u_char *, /* Prototypes for local functions. */ static enum nss_status getanswer_r (const querybuf *answer, int anslen, struct netent *result, char *buffer, - size_t buflen, lookup_method net_i); + size_t buflen, int *errnop, int *h_errnop, + lookup_method net_i); enum nss_status @@ -142,7 +143,8 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result, ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND; } - status = getanswer_r (net_buffer.buf, anslen, result, buffer, buflen, BYNAME); + status = getanswer_r (net_buffer.buf, anslen, result, buffer, buflen, + errnop, herrnop, BYNAME); if (net_buffer.buf != orig_net_buffer) free (net_buffer.buf); return status; @@ -218,7 +220,8 @@ _nss_dns_getnetbyaddr_r (uint32_t net, int type, struct netent *result, ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND; } - status = getanswer_r (net_buffer.buf, anslen, result, buffer, buflen, BYADDR); + status = getanswer_r (net_buffer.buf, anslen, result, buffer, buflen, + errnop, herrnop, BYADDR); if (net_buffer.buf != orig_net_buffer) free (net_buffer.buf); if (status == NSS_STATUS_SUCCESS) @@ -240,7 +243,8 @@ _nss_dns_getnetbyaddr_r (uint32_t net, int type, struct netent *result, static enum nss_status getanswer_r (const querybuf *answer, int anslen, struct netent *result, - char *buffer, size_t buflen, lookup_method net_i) + char *buffer, size_t buflen, int *errnop, int *h_errnop, + lookup_method net_i) { /* * Find first satisfactory answer @@ -260,8 +264,25 @@ getanswer_r (const querybuf *answer, int anslen, struct netent *result, { char *aliases[MAX_NR_ALIASES]; char linebuffer[0]; - } *net_data = (struct net_data *) buffer; + } *net_data; + + uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct net_data); + buffer += pad; + + if (__builtin_expect (buflen < sizeof (*net_data) + pad, 0)) + { + /* The buffer is too small. */ + too_small: + *errnop = ERANGE; + *h_errnop = NETDB_INTERNAL; + return NSS_STATUS_TRYAGAIN; + } + buflen -= pad; + + net_data = (struct net_data *) buffer; int linebuflen = buflen - offsetof (struct net_data, linebuffer); + if (buflen - offsetof (struct net_data, linebuffer) != linebuflen) + linebuflen = INT_MAX; const unsigned char *end_of_message = &answer->buf[anslen]; const HEADER *header_pointer = &answer->hdr; /* #/records in the answer section. */ @@ -319,10 +340,7 @@ getanswer_r (const querybuf *answer, int anslen, struct netent *result, if (n != -1 && __ns_name_ntop (packtmp, bp, linebuflen) == -1) { if (errno == EMSGSIZE) - { - errno = ERANGE; - return NSS_STATUS_TRYAGAIN; - } + goto too_small; n = -1; } @@ -346,10 +364,7 @@ getanswer_r (const querybuf *answer, int anslen, struct netent *result, if (n != -1 && __ns_name_ntop (packtmp, bp, linebuflen) == -1) { if (errno == EMSGSIZE) - { - errno = ERANGE; - return NSS_STATUS_TRYAGAIN; - } + goto too_small; n = -1; } |