On Tue, 11 Oct 2005, Alexander E. Patrakov wrote:
It is not an issue in the ssh itself. Testcase:
gcc -o test -ldl test.c
rm -rf /tmp/foobar; mkdir /tmp/foobar
./test
Dug out the patch from the libc-hacker archives, but I had to apply it
by hand, I think the line numbers changed a bit too much for patch to
figure it out. Can you confirm this is what you want put in, and can I
stick your name in the 'submitted by' ? I was thinking of calling it
glibc-2.3.4-open_path_segfault-1.patch.
My understanding from what Jakub put in the posting is that this only
applies if the standard directories are empty, e.g. in a chroot.
Ken
Submitted By:
Date: 2005-10-14
Initial Package Version: 3.3.4
Upstream Status: From glibc-cvs
Origin: http://sources.redhat.com/ml/libc-hacker/2005-02/msg00005.html
Applied by hand and rediffed by Ken Moffat.
Description: Avoid segfault if open_path doesn't find any of the
standard search directories.
2005-01-07 Jakub Jelinek <[EMAIL PROTECTED]>
* elf/dl-load.c (open_path): If rtld_search_dirs is in RELRO segment,
avoid writing to it if none of the standard search directories
exist.
diff -Naurp glibc-2.3.4.orig/elf/dl-load.c glibc-2.3.4/elf/dl-load.c
--- glibc-2.3.4.orig/elf/dl-load.c 2004-12-12 20:49:28.000000000 +0000
+++ glibc-2.3.4/elf/dl-load.c 2005-10-14 00:03:55.000000000 +0100
@@ -1788,6 +1788,11 @@ open_path (const char *name, size_t name
must not be freed using the general free() in libc. */
if (sps->malloced)
free (sps->dirs);
+#ifdef HAVE_Z_RELRO
+ /* rtld_search_dirs is attribute_relro, therefore avoid writing
+ into it. */
+ if (sps != &rtld_search_dirs)
+#endif
sps->dirs = (void *) -1;
}
--
das eine Mal als Tragödie, das andere Mal als Farce
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