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diff -rup glibc-2.17-c758a686/elf/dl-load.c glibc-2.17-c758a686/elf/dl-load.c
--- glibc-2.17-c758a686/elf/dl-load.c 2012-02-03 10:59:58.917870716 -0700
+++ glibc-2.17-c758a686/elf/dl-load.c 2012-02-03 11:01:01.796580644 -0700
@@ -1130,6 +1130,16 @@ _dl_map_object_from_fd (const char *name
= N_("ELF load command address/offset not properly aligned");
goto call_lose;
}
+ if (__builtin_expect ((ph->p_offset + ph->p_filesz > st.st_size), 0))
+ {
+ /* If the segment requires zeroing of part of its last
+ page, we'll crash when accessing the unmapped page.
+ There's still a possibility of a race, if the shared
+ object is truncated between the fxstat above and the
+ memset below. */
+ errstring = N_("ELF load command past end of file");
+ goto call_lose;
+ }
c = &loadcmds[nloadcmds++];
c->mapstart = ph->p_vaddr & ~(GLRO(dl_pagesize) - 1);
Only inglibc-2.17-c758a686/elf: dl-load.c.orig