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* reload /etc/resolv.conf when it has changedThorsten Kukuk2017-02-091-0/+23
| | | | | | | | | | | if /etc/resolv.conf is updated, then make sure applications already running get the updated information. https://bugs.gentoo.org/177416 https://sourceware.org/bugzilla/show_bug.cgi?id=984 https://sourceware.org/ml/libc-alpha/2004-09/msg00130.html https://sourceware.org/ml/libc-alpha/2016-12/msg00023.html https://build.opensuse.org/package/view_file/openSUSE:Factory/glibc/glibc-resolv-reload.diff?expand=1
* Update copyright dates with scripts/update-copyrights.Joseph Myers2017-01-0129-29/+29
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* Update DNS RR type definitions [BZ #20593]Florian Weimer2016-12-313-101/+178
| | | | | This commit includes a new script which allows generating parts of the header files from IANA DNS parameters protocol registry.
* CVE-2015-5180: resolv: Fix crash with internal QTYPE [BZ #18784]Florian Weimer2016-12-315-4/+196
| | | | | Also rename T_UNSPEC because an upcoming public header file update will use that name.
* resolv: Deprecate RES_BLASTFlorian Weimer2016-12-313-4/+3
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* resolv: Deprecate the "inet6" option and RES_USE_INET6 [BZ #19582]Florian Weimer2016-12-318-31/+56
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* resolv: Add beginnings of a libresolv test suiteFlorian Weimer2016-12-317-1/+1542
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* resolv: Turn historic name lookup functions into compat symbolsFlorian Weimer2016-12-302-51/+59
| | | | | | | | | This change also removes the preprocessor-based function renaming. It also applied to tests in resolv/, which ended up running against the historic functions. _endhtent was not part of the ABI because it is not listed in the resolv/Versions file.
* Fix typos in the spelling of "implementation"Dmitry V. Levin2016-12-271-1/+1
| | | | | | | | | | | | | Apply the following spelling fix: $ git grep -El 'implemetn?ation' | xargs sed -ri 's/implemetn?ation/implementation/g' [BZ #19514] * resolv/res_send.c: Fix typo in comment. * sysdeps/i386/i386-mcount.S: Likewise. * sysdeps/s390/s390-32/s390-mcount.S: Likewise. * sysdeps/s390/s390-64/s390x-mcount.S: Likewise. * sysdeps/sparc/sparc-mcount.S: Likewise.
* resolv: Remove processing of unimplemented "spoof" host.conf optionsFlorian Weimer2016-12-272-38/+0
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* Drop explicit stack-protection of pieces of the system [BZ #7065]Nick Alcock2016-12-261-1/+0
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* Bug 20729: Fix build failures on ppc64 and other arches.Carlos O'Donell2016-11-021-2/+2
| | | | | | | | The changes to fix bug 20729 introduced an error which removed an ignore diagnostic from -O2 by using the new -Os related macro. This broke ppc64 builds. This commit fixes the mistake. Tested on x86, x86_64, ppc64, ppc64le, arm, aarch64, and s390x.
* Bug 20729: Fix building with -Os.Carlos O'Donell2016-10-291-1/+10
| | | | | | | | | | This commit adds a new DIAG_IGNORE_Os_NEEDS_COMMENT which is only enabled when compiling with -Os. This allows developers working on -Os enabled builds to mark false-positive warnings without impacting the warnings emitted at -O2. Then using the new DIAG_IGNORE_Os_NEEDS_COMMENT we fix 6 warnings generated with GCC 5 to get -Os builds working again.
* resolv: Compile without -Wno-write-stringsFlorian Weimer2016-10-113-84/+82
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* resolv: Remove RES_USEBSTRING and its implementation [BZ #20629]Florian Weimer2016-10-075-266/+8
| | | | | | In ns_name_ntop, the NS_CMPRSFLGS check is no longer needed because labellen (called earlier) already rejects everything which is not a plain label (compression references and extended label types).
* resolv: Remove RES_NOIP6DOTINT and its implementationFlorian Weimer2016-10-075-20/+1
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* resolv: Deprecate unimplemented flagsFlorian Weimer2016-10-073-9/+8
| | | | | | RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG result in compile-time warnings. Some of these flags are still used in applications.
* Installed-header hygiene (BZ#20366): time.h types.Zack Weinberg2016-09-231-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Many headers are expected to expose a subset of the type definitions in time.h. time.h has a whole bunch of messy logic for conditionally defining some its types and structs, but, as best I can tell, this has never worked 100%. In particular, __need_timespec is ineffective if _TIME_H has already been defined, which means that if you compile #include <time.h> #include <sched.h> with e.g. -fsyntax-only -std=c89 -Wall -Wsystem-headers, you will get In file included from test.c:2:0: /usr/include/sched.h:74:57: warning: "struct timespec" declared inside parameter list will not be visible outside of this definition or declaration extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW; ^~~~~~~~ And if you want to _use_ sched_rr_get_interval in a TU compiled that way, you're hosed. This patch replaces all of that with small bits/types/TYPE.h headers as introduced earlier. time.h and bits/time.h are now *much* simpler, and a lot of other headers are slightly simpler. * time/time.h, bits/time.h, sysdeps/unix/sysv/linux/bits/time.h: Remove all logic conditional on __need macros. Move all the conditionally defined types to their own headers... * time/bits/types/clock_t.h: Define clock_t here. * time/bits/types/clockid_t.h: Define clockid_t here. * time/bits/types/struct_itimerspec.h: Define struct itimerspec here. * time/bits/types/struct_timespec.h: Define struct timespec here. * time/bits/types/struct_timeval.h: Define struct timeval here. * time/bits/types/struct_tm.h: Define struct tm here. * time/bits/types/time_t.h: Define time_t here. * time/bits/types/timer_t.h: Define timer_t here. * time/Makefile: Install the new headers. * bits/resource.h, io/fcntl.h, io/sys/poll.h, io/sys/stat.h * io/utime.h, misc/sys/select.h, posix/sched.h, posix/sys/times.h * posix/sys/types.h, resolv/netdb.h, rt/aio.h, rt/mqueue.h * signal/signal.h, pthread/semaphore.h, sysdeps/nptl/pthread.h * sysdeps/unix/sysv/linux/alpha/bits/resource.h * sysdeps/unix/sysv/linux/alpha/sys/acct.h * sysdeps/unix/sysv/linux/bits/resource.h * sysdeps/unix/sysv/linux/bits/timex.h * sysdeps/unix/sysv/linux/mips/bits/resource.h * sysdeps/unix/sysv/linux/net/ppp_defs.h * sysdeps/unix/sysv/linux/sparc/bits/resource.h * sysdeps/unix/sysv/linux/sys/acct.h * sysdeps/unix/sysv/linux/sys/timerfd.h * sysvipc/sys/msg.h, sysvipc/sys/sem.h, sysvipc/sys/shm.h * time/sys/time.h, time/sys/timeb.h Use the new bits/types headers. * include/time.h: Remove __need logic. * include/bits/time.h * include/bits/types/clock_t.h, include/bits/types/clockid_t.h * include/bits/types/time_t.h, include/bits/types/timer_t.h * include/bits/types/struct_itimerspec.h * include/bits/types/struct_timespec.h * include/bits/types/struct_timeval.h * include/bits/types/struct_tm.h: New wrapper headers.
* Installed-header hygiene (BZ#20366): obsolete BSD u_* types.Zack Weinberg2016-09-232-108/+129
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The types u_char, u_short, u_int, u_long, ushort, uint, ulong, u_int8_t, u_int16_t, u_int32_t, u_int64_t, quad_t, and u_quad_t are BSDisms that have never been standardized. While glibc should continue to *provide* these types for compatibility's sake, its public headers should not use them. The meat of this change was mechanically generated by the following shell command: perl -pi~ -e ' s/\b(__)?u_char\b/unsigned char/g; s/\b(__)?u_?short\b/unsigned short/g; s/\b(__)?u_?int\b/unsigned int/g; s/\b(__)?u_?long\b/unsigned long/g; s/\b(__)?u_int8_t\b/uint8_t/g; s/\b(__)?u_int16_t\b/uint16_t/g; s/\b(__)?u_int32_t\b/uint32_t/g; s/\b(__)?u_int64_t\b/uint64_t/g; s/\b(__)?u_quad_t\b/uint64_t/g; s/\b(__)?quad_t\b/uint64_t/g; ' $(grep -lE -e '\<((__)?(quad_t|u(short|int|long|_(char|short|int([0-9]+_t)?|long|quad_t))))\>' \ $(grep -LE '\<(_(SYS|BITS)_TYPES_H|rpc/(rpc|rpc_msg|types|xdr)\.h)\>' \ $(find . \( -false $(sed 's/^/-o -name /' all-installed-headers) \ \) -printf '%P\n' | sort -u))) where 'all-installed-headers' was a list of the basenames of all installed header files, manually extracted from the Makefiles. Non-installed wrapper headers in include/ are also adjusted, for consistency. I then manually fixed up indentation and line-wrapping. sys/types.h and bits/types.h are excluded because they must continue to define the u_* types (under __USE_MISC) for compatibility with applications. They do not use these types themselves. All headers that (transitively) include rpc/types.h are also excluded, for three reasons. First, the u_* types are defined by rpc/types.h, unconditionally (not just under __USE_MISC) so they are logically part of the SunRPC API. Second, many of those headers appear to be machine-generated. Third, it's my understanding that we are getting rid of as much of SunRPC as possible in the near future. (The one file under sunrpc/ that's touched, sunrpc/rpc/rpc_des.h, does *not* include rpc/types.h. This may itself be a bug.) After changing from u_intNN_t to uintNN_t, a number of headers now need to include stdint.h to pick up those types. It might be more hygenic, namespace-wise, to use __uintNN_t instead, but none of these headers are bound by ISO or POSIX to do so, and it's unlikely that anyone using them will be bothered. (The two files that were using __-prefixed versions of the u_types, sysdeps/mach/hurd/net/route.h and sysdeps/unix/sysv/linux/net/route.h, both already also contained uses of the unprefixed versions.) Some of these files directly included features.h and/or sys/cdefs.h, which I removed, as the style generally seems to be to let sys/types.h do that for us. (This does not change the set of definitions exposed by any header; sys/types.h unconditionally includes both features.h and sys/cdefs.h.) One file included asm/types.h unnecessarily. * bits/in.h, gmon/sys/gmon.h, inet/netinet/igmp.h * inet/protocols/routed.h, inet/protocols/talkd.h * inet/protocols/timed.h, io/fts.h, nptl_db/thread_db.h * resolv/arpa/nameser.h, resolv/resolv.h, sunrpc/rpc/rpc_des.h * sysdeps/generic/netinet/if_ether.h * sysdeps/generic/netinet/in_systm.h * sysdeps/generic/netinet/ip.h, sysdeps/generic/netinet/tcp.h * sysdeps/gnu/netinet/ip_icmp.h, sysdeps/gnu/netinet/tcp.h * sysdeps/gnu/netinet/udp.h, sysdeps/mach/hurd/net/ethernet.h * sysdeps/mach/hurd/net/if_arp.h * sysdeps/mach/hurd/net/if_ppp.h * sysdeps/mach/hurd/net/route.h, sysdeps/mach/sys/reboot.h * sysdeps/unix/sysv/linux/bits/in.h * sysdeps/unix/sysv/linux/net/ethernet.h * sysdeps/unix/sysv/linux/net/if_arp.h * sysdeps/unix/sysv/linux/net/if_ppp.h * sysdeps/unix/sysv/linux/net/if_shaper.h * sysdeps/unix/sysv/linux/net/route.h * sysdeps/unix/sysv/linux/netinet/if_ether.h * sysdeps/unix/sysv/linux/netinet/if_fddi.h * sysdeps/unix/sysv/linux/netinet/if_tr.h * sysdeps/unix/sysv/linux/netipx/ipx.h * sysdeps/unix/sysv/linux/sys/acct.h * include/arpa/nameser.h, include/resolv.h: Change all uses of u_char to unsigned char, u_short and ushort to unsigned short, u_int and uint to unsigned int, u_long and ulong to unsigned long, u_int8_t to uint8_t, u_int16_t to uint16_t, u_int32_t to uint32_t, quad_t to int64_t, and u_int64_t and u_quad_t to uint64_t. * mach/sys/reboot.h: Remove two casts of integer literals to the types they already have. * bits/in.h: Correct error in description of IP_MULTICAST_LOOP. * sysdeps/unix/sysv/linux/bits/in.h: Likewise. * sysdeps/unix/sysv/linux/netinet/if_ether.h: Change a comment from referring to 'unsigned char' to 'uint8_t' for consistency with the macro definition below. * gmon/sys/gmon.h, inet/netinet/igmp.h, inet/protocols/talkd.h * io/fts.h, resolv/arpa/nameser.h, resolv/resolv.h * sunrpc/rpc/rpc_des.h, sysdeps/generic/netinet/ip.h * sysdeps/gnu/netinet/tcp.h, sysdeps/gnu/netinet/udp.h * sysdeps/mach/hurd/net/if_ppp.h, sysdeps/unix/sysv/linux/net/if_ppp.h * sysdeps/unix/sysv/linux/sys/acct.h * include/arpa/nameser.h, include/resolv.h: Fix indentation disrupted by mechanical edits. * inet/protocols/talkd.h, resolv/arpa/nameser.h * sysdeps/generic/netinet/in_systm.h * sysdeps/gnu/netinet/ip_icmp.h, sysdeps/gnu/netinet/tcp.h * sysdeps/gnu/netinet/udp.h * sysdeps/unix/sysv/linux/net/ethernet.h * sysdeps/unix/sysv/linux/net/if_arp.h * sysdeps/unix/sysv/linux/net/if_ppp.h * sysdeps/unix/sysv/linux/net/if_shaper.h * sysdeps/unix/sysv/linux/netinet/if_fddi.h * sysdeps/unix/sysv/linux/netinet/if_tr.h * sysdeps/unix/sysv/linux/netipx/ipx.h * sysdeps/unix/sysv/linux/sys/acct.h Include stdint.h for uintNN_t definitions. Don't include sys/cdefs.h, features.h, or asm/types.h directly.
* Installed-header hygiene (BZ#20366): Simple self-contained fixes.Zack Weinberg2016-09-231-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some headers did not include all of their prerequisite headers. * rpcsvc/nislib.h: Include rpcsvc/nis.h. * sysdeps/unix/sysv/linux/netrose/rose.h: Include sys/socket.h and netax25/ax25.h. <endian.h> only defines BYTE_ORDER, BIG_ENDIAN, LITTLE_ENDIAN, etc. under __USE_MISC; glibc's headers should use __BYTE_ORDER, __BIG_ENDIAN, __LITTLE_ENDIAN, etc. instead. * inet/netinet/icmp6.h, inet/netinet/ip6.h * resolv/arpa/nameser_compat.h: Use __BYTE_ORDER etc. instead of BYTE_ORDER etc. sys/types.h only conditionally defines caddr_t and clockid_t. * sysdeps/unix/sysv/linux/sys/quota.h: Use __caddr_t instead of caddr_t. * sysdeps/unix/sysv/linux/sys/timerfd.h: Use __clockid_t instead of clockid_t. Remove a #warning that was the sole actual problem with using sys/ipc.h without _GNU_SOURCE/_XOPEN_SOURCE. * sysvipc/sys/ipc.h: Remove unnecessary #warning. _LIBC, __USE_XOPEN2K8, and __STDC_VERSION__ are not always defined. It seems to me that _LIBC should not appear in installed headers, but avoiding that for argp specifically would require more surgery than feels appropriate for this patch set. It's possible that "#ifdef _LIBC" would be sufficient, but I wanted to be conservative. All three versions of bits/socket.h want to know whether __flexarr will produce a real flexible array member -- specifically, one that doesn't alter sizeof(the structure containing it). They were testing for this with a complicated #if condition that did not agree with sys/cdefs.h and that tripped -Wundef warnings under -std=c90. I added a new macro to sys/cdefs.h, __glibc_c99_flexarr_available, which reveals exactly what these headers want to know. I also took the opportunity to flatten the rather messy conditional nest defining __flexarr. * argp/argp.h: Check whether _LIBC is defined before expanding it. * posix/glob.h: Check whether __USE_XOPEN2K8 is defined instead of expanding it. * misc/sys/cdefs.h: Tidy up conditional nest defining __flexarr. Define __glibc_c99_flexarr_available to 1 when the compiler supports C99-compatible flexible array members, 0 otherwise. * sysdeps/unix/sysv/linux/bits/socket.h * sysdeps/mach/hurd/bits/socket.h * bits/socket.h: Use __glibc_c99_flexarr_available in definitions of struct cmsghdr and CMSG_DATA.
* resolv: Remove unsupported hook functions from the API [BZ #20016]Florian Weimer2016-09-216-117/+61
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* <arpa/nameser.h>: Remove RR type classification macros [BZ #20592]Florian Weimer2016-09-211-11/+0
| | | | | | The macros are no longer up-to-date, and the classification is not useful. In this particular case, removal without prior deprecation seems the right approach.
* <arpa/nameser.h>, <arpa/nameser_compat.h>: Remove versionsFlorian Weimer2016-09-212-20/+0
| | | | Our header files no longer match the BIND versions.
* resolv: Remove the BIND_4_COMPAT macroFlorian Weimer2016-09-212-8/+0
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* Remove obsolete DNSSEC support [BZ #20591]Florian Weimer2016-09-213-320/+1
| | | | The removed function declaration have never been implemented in libresolv.
* inet: Add __inet6_scopeid_pton function [BZ #20611]Florian Weimer2016-09-151-20/+7
| | | | | __inet6_scopeid_pton implements strict validation of numeric scope IDs. Use it in getaddrinfo and __res_vinit.
* resolv: Remove _LIBC_REENTRANTFlorian Weimer2016-09-131-2/+0
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* Fix incorrect double-checked locking related to _res_hconf.initialized.Torvald Riegel2016-08-182-1/+11
| | | | | | | | | | | | | | | | | | _res_hconf.initialized was not suitable for use in a multi-threaded environment due to the lack of atomics and memory barriers. Use of it was also unnecessary because _res_hconf_init did the right thing by using __libc_once. This patch fixes the glibc-internal uses by just calling _res_hconf_init unconditionally, and switches to a release MO atomic store for _res_hconf.initialized to fix the glibc side of the synchronization problem (which will maintain backward compatibility, but cannot fix the lack of acquire MO on any glibc-external loads). [BZ #20477] * resolv/res_hconf.c (do_init): Use atomic access. * resolv/res_hconf.h: Add comments. * nscd/aicache.c (addhstaiX): Call _res_hconf_init unconditionally. * nss/getXXbyYY_r.c (REENTRANT_NAME): Likewise. * sysdeps/posix/getaddrinfo.c (gaih_inet): Likewise.
* resolv: Call gmtime_r instead of gmtime in p_secstodate [BZ #20017]Florian Weimer2016-05-101-6/+1
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* resolv: Reindent preprocessor conditionals following cleanupsFlorian Weimer2016-04-283-12/+12
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* resolv: Assorted preprocessor cleanupsFlorian Weimer2016-04-282-39/+3
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* resolv: Remove SUNSECURITY preprocessor conditionalsFlorian Weimer2016-04-282-37/+0
| | | | The macro is never defined.
* resolv: Remove BSD compatibility conditionals and headerFlorian Weimer2016-04-282-58/+3
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* resolv: Remove __BIND_NOSTATIC conditionalsFlorian Weimer2016-04-282-4/+0
| | | | The macro is never defined.
* resolv: Remove traces of ULTRIX supportFlorian Weimer2016-04-282-19/+0
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* resolv: Remove RFC1535 conditionalsFlorian Weimer2016-04-282-31/+0
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* resolv: Remove RESOLVSORT preprocess conditionalsFlorian Weimer2016-04-283-23/+0
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* resolv: Remove BIND_UPDATE preprocessor conditionalsFlorian Weimer2016-04-281-36/+0
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* resolv: Remove _LIBC conditionalsFlorian Weimer2016-04-286-140/+4
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* resolv: Remove SCCS and RCS keywordsFlorian Weimer2016-04-2823-100/+0
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* nss_dns: Skip over non-PTR records in the netent code [BZ #19868]Florian Weimer2016-04-271-2/+18
| | | | | This requires additional checks for the RDATA length and the availability of record metadata.
* nss_dns: Remove custom offsetof macro definitionFlorian Weimer2016-04-271-3/+1
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* nss_dns: Check address length before creating addrinfo result [BZ #19831]Florian Weimer2016-04-271-20/+39
| | | | | | | | | Previously, we allocated room in the result space before the check, leaving uninitialized data there in case the check failed. This also consolidates the behavior between single (A or AAAA) and dual (A and AAAA in parallel) queries. Single queries checked the record length against the QTYPE, not the RRTYPE.
* resolv, nss_dns: Remove remaining syslog logging [BZ #19862]Florian Weimer2016-04-272-42/+0
| | | | The fix for bug 14841 only removed part of the logging.
* nss_dns: Validate RDATA length against packet length [BZ #19830]Florian Weimer2016-04-272-3/+28
| | | | | In _nss_dns_getcanonname_r, a check for the availability of RR metadata was missing as well.
* resolv: Always set *resplen2 out parameter in send_vc [BZ #19825]Florian Weimer2016-04-271-21/+18
| | | | | | | In various error scenarios (for example, if the server closes the TCP connection before sending the full response), send_vc can return without resetting the *resplen2 value. This can pass uninitialized or unexpected data to the caller.
* nss_dns: Fix assertion failure in _nss_dns_getcanonname_r [BZ #19865]Florian Weimer2016-04-111-0/+7
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* CVE-2016-3075: Stack overflow in _nss_dns_getnetbyname_r [BZ #19879]Florian Weimer2016-03-291-4/+1
| | | | | The defensive copy is not needed because the name may not alias the output buffer.
* resolv: Always set *resplen2 out parameter in send_dg [BZ #19791]Florian Weimer2016-03-251-23/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit 44d20bca52ace85850012b0ead37b360e3ecd96e (Implement second fallback mode for DNS requests), there is a code path which returns early, before *resplen2 is initialized. This happens if the name server address is immediately recognized as invalid (because of lack of protocol support, or if it is a broadcast address such 255.255.255.255, or another invalid address). If this happens and *resplen2 was non-zero (which is the case if a previous query resulted in a failure), __libc_res_nquery would reuse an existing second answer buffer. This answer has been previously identified as unusable (for example, it could be an NXDOMAIN response). Due to the presence of a second answer, no name server switching will occur. The result is a name resolution failure, although a successful resolution would have been possible if name servers have been switched and queries had proceeded along the search path. The above paragraph still simplifies the situation. Before glibc 2.23, if the second answer needed malloc, the stub resolver would still attempt to reuse the second answer, but this is not possible because __libc_res_nsearch has freed it, after the unsuccessful call to __libc_res_nquerydomain, and set the buffer pointer to NULL. This eventually leads to an assertion failure in __libc_res_nquery: /* Make sure both hp and hp2 are defined */ assert((hp != NULL) && (hp2 != NULL)); If assertions are disabled, the consequence is a NULL pointer dereference on the next line. Starting with glibc 2.23, as a result of commit e9db92d3acfe1822d56d11abcea5bfc4c41cf6ca (CVE-2015-7547: getaddrinfo() stack-based buffer overflow (Bug 18665)), the second answer is always allocated with malloc. This means that the assertion failure happens with small responses as well because there is no buffer to reuse, as soon as there is a name resolution failure which triggers a search for an answer along the search path. This commit addresses the issue by ensuring that *resplen2 is initialized before the send_dg function returns. This commit also addresses a bug where an invalid second reply is incorrectly returned as a valid to the caller.
* Fix hurd buildSamuel Thibault2016-03-161-0/+1
| | | | | | | | * sysdeps/mach/hurd/openat.c (__openat): Add missing ellipsis. * resolv/gai_sigqueue.c (__gai_sigqueue): Add missing internal_function qualifier. * /rt/aio_sigqueue.c (__aio_sigqueue): Add missing attribute_hidden internal_function qualifiers.
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