diff options
Diffstat (limited to '0003-nscd-Do-not-rebuild-getaddrinfo-bug-30709.patch')
| -rw-r--r-- | 0003-nscd-Do-not-rebuild-getaddrinfo-bug-30709.patch | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/0003-nscd-Do-not-rebuild-getaddrinfo-bug-30709.patch b/0003-nscd-Do-not-rebuild-getaddrinfo-bug-30709.patch new file mode 100644 index 000000000000..f1fb7f793b58 --- /dev/null +++ b/0003-nscd-Do-not-rebuild-getaddrinfo-bug-30709.patch @@ -0,0 +1,184 @@ +From 039ff51ac7e02db1cfc0c23e38ac7bfbb00221d1 Mon Sep 17 00:00:00 2001 +From: Florian Weimer <fweimer@redhat.com> +Date: Fri, 11 Aug 2023 10:10:16 +0200 +Subject: [PATCH] nscd: Do not rebuild getaddrinfo (bug 30709) + +The nscd daemon caches hosts data from NSS modules verbatim, without +filtering protocol families or sorting them (otherwise separate caches +would be needed for certain ai_flags combinations). The cache +implementation is complete separate from the getaddrinfo code. This +means that rebuilding getaddrinfo is not needed. The only function +actually used is __bump_nl_timestamp from check_pf.c, and this change +moves it into nscd/connections.c. + +Tested on x86_64-linux-gnu with -fexceptions, built with +build-many-glibcs.py. I also backported this patch into a distribution +that still supports nscd and verified manually that caching still works. + +Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org> +--- + include/ifaddrs.h | 4 --- + inet/check_pf.c | 9 ------ + nscd/Makefile | 2 +- + nscd/connections.c | 11 +++++++ + nscd/gai.c | 50 ------------------------------ + sysdeps/unix/sysv/linux/check_pf.c | 17 +--------- + 6 files changed, 13 insertions(+), 80 deletions(-) + delete mode 100644 nscd/gai.c + +diff --git a/include/ifaddrs.h b/include/ifaddrs.h +index 416118f1b3..19a3afb19f 100644 +--- a/include/ifaddrs.h ++++ b/include/ifaddrs.h +@@ -34,9 +34,5 @@ extern void __check_native (uint32_t a1_index, int *a1_native, + uint32_t a2_index, int *a2_native) + attribute_hidden; + +-#if IS_IN (nscd) +-extern uint32_t __bump_nl_timestamp (void) attribute_hidden; +-#endif +- + # endif /* !_ISOMAC */ + #endif /* ifaddrs.h */ +diff --git a/inet/check_pf.c b/inet/check_pf.c +index 5310c99121..6d1475920f 100644 +--- a/inet/check_pf.c ++++ b/inet/check_pf.c +@@ -60,12 +60,3 @@ __free_in6ai (struct in6addrinfo *in6ai) + { + /* Nothing to do. */ + } +- +- +-#if IS_IN (nscd) +-uint32_t +-__bump_nl_timestamp (void) +-{ +- return 0; +-} +-#endif +diff --git a/nscd/Makefile b/nscd/Makefile +index 2a0489f4cf..16b6460ee9 100644 +--- a/nscd/Makefile ++++ b/nscd/Makefile +@@ -35,7 +35,7 @@ nscd-modules := nscd connections pwdcache getpwnam_r getpwuid_r grpcache \ + getgrnam_r getgrgid_r hstcache gethstbyad_r gethstbynm3_r \ + getsrvbynm_r getsrvbypt_r servicescache \ + dbg_log nscd_conf nscd_stat cache mem nscd_setup_thread \ +- xmalloc xstrdup aicache initgrcache gai res_hconf \ ++ xmalloc xstrdup aicache initgrcache res_hconf \ + netgroupcache cachedumper + + ifeq ($(build-nscd)$(have-thread-library),yesyes) +diff --git a/nscd/connections.c b/nscd/connections.c +index a405a44a9b..15693e5090 100644 +--- a/nscd/connections.c ++++ b/nscd/connections.c +@@ -256,6 +256,17 @@ int inotify_fd = -1; + #ifdef HAVE_NETLINK + /* Descriptor for netlink status updates. */ + static int nl_status_fd = -1; ++ ++static uint32_t ++__bump_nl_timestamp (void) ++{ ++ static uint32_t nl_timestamp; ++ ++ if (atomic_fetch_add_relaxed (&nl_timestamp, 1) + 1 == 0) ++ atomic_fetch_add_relaxed (&nl_timestamp, 1); ++ ++ return nl_timestamp; ++} + #endif + + /* Number of times clients had to wait. */ +diff --git a/nscd/gai.c b/nscd/gai.c +deleted file mode 100644 +index e29f3fe583..0000000000 +--- a/nscd/gai.c ++++ /dev/null +@@ -1,50 +0,0 @@ +-/* Copyright (C) 2004-2022 Free Software Foundation, Inc. +- This file is part of the GNU C Library. +- +- This program is free software; you can redistribute it and/or modify +- it under the terms of the GNU General Public License as published +- by the Free Software Foundation; version 2 of the License, or +- (at your option) any later version. +- +- This program is distributed in the hope that it will be useful, +- but WITHOUT ANY WARRANTY; without even the implied warranty of +- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +- GNU General Public License for more details. +- +- You should have received a copy of the GNU General Public License +- along with this program; if not, see <https://www.gnu.org/licenses/>. */ +- +-#include <alloca.h> +-#include <sys/stat.h> +- +-/* This file uses the getaddrinfo code but it compiles it without NSCD +- support. We just need a few symbol renames. */ +-#define __ioctl ioctl +-#define __getsockname getsockname +-#define __socket socket +-#define __recvmsg recvmsg +-#define __bind bind +-#define __sendto sendto +-#define __strchrnul strchrnul +-#define __getline getline +-#define __qsort_r qsort_r +-/* nscd uses 1MB or 2MB thread stacks. */ +-#define __libc_use_alloca(size) (size <= __MAX_ALLOCA_CUTOFF) +-#define __getifaddrs getifaddrs +-#define __freeifaddrs freeifaddrs +-#undef __fstat64 +-#define __fstat64 fstat64 +-#undef __stat64 +-#define __stat64 stat64 +- +-/* We are nscd, so we don't want to be talking to ourselves. */ +-#undef USE_NSCD +- +-#include <getaddrinfo.c> +- +-/* Support code. */ +-#include <check_pf.c> +-#include <check_native.c> +- +-/* Some variables normally defined in libc. */ +-nss_action_list __nss_hosts_database attribute_hidden; +diff --git a/sysdeps/unix/sysv/linux/check_pf.c b/sysdeps/unix/sysv/linux/check_pf.c +index 2b0b8b6368..3aa6a00348 100644 +--- a/sysdeps/unix/sysv/linux/check_pf.c ++++ b/sysdeps/unix/sysv/linux/check_pf.c +@@ -66,25 +66,10 @@ static struct cached_data *cache; + __libc_lock_define_initialized (static, lock); + + +-#if IS_IN (nscd) +-static uint32_t nl_timestamp; +- +-uint32_t +-__bump_nl_timestamp (void) +-{ +- if (atomic_increment_val (&nl_timestamp) == 0) +- atomic_increment (&nl_timestamp); +- +- return nl_timestamp; +-} +-#endif +- + static inline uint32_t + get_nl_timestamp (void) + { +-#if IS_IN (nscd) +- return nl_timestamp; +-#elif defined USE_NSCD ++#if defined USE_NSCD + return __nscd_get_nl_timestamp (); + #else + return 0; +-- +2.42.0 + |