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glibc
nscd-aicache.patch
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File nscd-aicache.patch of Package glibc
From 6e33e5c4b73cea7b8aa3de0947123db16200fb65 Mon Sep 17 00:00:00 2001 From: Siddhesh Poyarekar <siddhesh@sourceware.org> Date: Tue, 4 Oct 2022 18:40:25 -0400 Subject: [PATCH] nscd: Drop local address tuple variable [BZ #29607] MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When a request needs to be resent (e.g. due to insufficient buffer space), the references to subsequent tuples in the local variable are stale and should not be used. This used to work by accident before, but since 1d495912a it no longer does. Instead of trying to reset it, just let gethostbyname4_r write into TUMPBUF6 for us, thus maintaining a consistent state at all times. This is now consistent with what is done in gaih_inet for getaddrinfo. Resolves: BZ #29607 Reported-by: Holger Hoffstätte <holger@applied-asynchrony.com> Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com> --- nscd/aicache.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/nscd/aicache.c b/nscd/aicache.c index 51e793199f..e0baed170b 100644 --- a/nscd/aicache.c +++ b/nscd/aicache.c @@ -110,11 +110,10 @@ addhstaiX (struct database_dyn *db, int fd, request_header *req, "gethostbyname4_r"); if (fct4 != NULL) { - struct gaih_addrtuple atmem; struct gaih_addrtuple *at; while (1) { - at = &atmem; + at = NULL; rc6 = 0; herrno = 0; status[1] = DL_CALL_FCT (fct4, (key, &at, @@ -137,7 +136,7 @@ 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 = &atmem; at2 != NULL; + for (const struct gaih_addrtuple *at2 = at; at2 != NULL; at2 = at2->next) { ++naddrs; -- 2.38.0
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