linux-stable/scripts/mod
Krzysztof Halasa 53c6c129e3 kbuild: Fix modpost segfault
commit 1c938663d5 upstream.

Alan <alan@clueserver.org> writes:

> program: /home/alan/GitTrees/linux-2.6-mid-ref/scripts/mod/modpost -o
> Module.symvers -S vmlinux.o
>
> Program received signal SIGSEGV, Segmentation fault.

It just hit me.
It's the offset calculation in reloc_location() which overflows:
        return (void *)elf->hdr + sechdrs[section].sh_offset +
               (r->r_offset - sechdrs[section].sh_addr);

E.g. for the first rodata r entry:
r->r_offset < sechdrs[section].sh_addr
and the expression in the parenthesis produces 0xFFFFFFE0 or something
equally wise.

Reported-by: Alan <alan@clueserver.org>
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Tested-by: Alan <alan@clueserver.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-08-02 10:30:19 -07:00
..
.gitignore Add some basic .gitignore files 2005-10-18 08:26:15 -07:00
empty.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
file2alias.c modpost: fix segfault in sym_is() with prefixed arches 2010-01-17 11:00:53 -08:00
Makefile module: make MODULE_SYMBOL_PREFIX into a CONFIG option 2009-12-15 16:28:26 +10:30
mk_elfconfig.c module: make MODULE_SYMBOL_PREFIX into a CONFIG option 2009-12-15 16:28:26 +10:30
modpost.c kbuild: Fix modpost segfault 2010-08-02 10:30:19 -07:00
modpost.h Kbuild: clear marker out of modpost 2009-12-15 16:28:31 +10:30
sumversion.c trivial: remove references to non-existent include/linux/config.h 2009-09-21 15:14:52 +02:00