85d17fd9a2
elf: Add TLS modid reuse test for bug 29039
elf: Fix TLS modid reuse generation assignment
elf: Check objname before calling fatal_error
elf: Fix _dl_debug_vdprintf to work before self-relocation
elf: ldconfig should skip temporary files created by package managers
ldconfig: Fixes for skipping temporary files.
(cherry picked from commit 54a5b49802feca14ddc99bb0ee816ef0e248c38c)
77 lines
2.5 KiB
Diff
77 lines
2.5 KiB
Diff
From 2aa0974d2573441bffd596b07bff8698b1f2f18c Mon Sep 17 00:00:00 2001
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From: Florian Weimer <fweimer@redhat.com>
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Date: Fri, 20 Oct 2023 14:29:50 +0200
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Subject: [PATCH 1/1] elf: ldconfig should skip temporary files created by
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package managers
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This avoids crashes due to partially written files, after a package
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update is interrupted.
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Reference:https://sourceware.org/git/?p=glibc.git;a=commit;h=2aa0974d2573441bffd596b07bff8698b1f2f18c
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Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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---
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elf/ldconfig.c | 39 +++++++++++++++++++++++++++------------
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1 file changed, 27 insertions(+), 12 deletions(-)
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diff --git a/elf/ldconfig.c b/elf/ldconfig.c
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index 6190e0ea..73b5ef27 100644
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--- a/elf/ldconfig.c
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+++ b/elf/ldconfig.c
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@@ -746,6 +746,31 @@ struct dlib_entry
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struct dlib_entry *next;
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};
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+/* Skip some temporary DSO files. These files may be partially written
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+ and lead to ldconfig crashes when examined. */
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+static bool
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+skip_dso_based_on_name (const char *name, size_t len)
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+{
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+ /* Skip temporary files created by the prelink program. Files with
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+ names like these are never really DSOs we want to look at. */
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+ if (len >= sizeof (".#prelink#") - 1)
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+ {
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+ if (strcmp (name + len - sizeof (".#prelink#") + 1,
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+ ".#prelink#") == 0)
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+ return true;
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+ if (len >= sizeof (".#prelink#.XXXXXX") - 1
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+ && memcmp (name + len - sizeof (".#prelink#.XXXXXX")
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+ + 1, ".#prelink#.", sizeof (".#prelink#.") - 1) == 0)
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+ return true;
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+ }
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+ /* Skip temporary files created by RPM. */
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+ if (memchr (name, len, ';') != NULL)
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+ return true;
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+ /* Skip temporary files created by dpkg. */
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+ if (len > 4 && memcmp (name + len - 4, ".tmp", 4) == 0)
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+ return true;
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+ return false;
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+}
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static void
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search_dir (const struct dir_entry *entry)
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@@ -822,18 +847,8 @@ search_dir (const struct dir_entry *entry)
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continue;
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size_t len = strlen (direntry->d_name);
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- /* Skip temporary files created by the prelink program. Files with
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- names like these are never really DSOs we want to look at. */
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- if (len >= sizeof (".#prelink#") - 1)
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- {
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- if (strcmp (direntry->d_name + len - sizeof (".#prelink#") + 1,
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- ".#prelink#") == 0)
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- continue;
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- if (len >= sizeof (".#prelink#.XXXXXX") - 1
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- && memcmp (direntry->d_name + len - sizeof (".#prelink#.XXXXXX")
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- + 1, ".#prelink#.", sizeof (".#prelink#.") - 1) == 0)
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- continue;
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- }
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+ if (skip_dso_based_on_name (direntry->d_name, len))
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+ continue;
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len += strlen (entry->path) + 2;
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if (len > file_name_len)
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{
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--
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2.33.0
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