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Three trivial patches of no real utility. Modules are boring.

Browse source 
Fortunately David Howells is looking to change this, with his module signing
 patchset.  But that's for next merge window...
 
 Cheers,
 Rusty.
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Merge tag 'module-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus

Pull module patches from Rusty Russell, who really sells them:
 "Three trivial patches of no real utility.  Modules are boring."

But to make things slightly more exciting, he adds:
 "Fortunately David Howells is looking to change this, with his module
  signing patchset.  But that's for next merge window...

  Cheers,
  Rusty."

* tag 'module-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  Guard check in module loader against integer overflow
  modpost: use proper kernel style for autogenerated files
  modpost: Stop grab_file() from leaking filedescriptors if fstat() fails
This commit is contained in:
Linus Torvalds 2012-05-23 17:34:09 -07:00
commit fb827ec684
2 changed files with 12 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
kernel/module.c
View file

@ -2429,7 +2429,8 @@ static int copy_and_check(struct load_info *info,
goto free_hdr;
}
if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) {
if (hdr->e_shoff >= len ||
hdr->e_shnum * sizeof(Elf_Shdr) > len - hdr->e_shoff) {
err = -ENOEXEC;
goto free_hdr;
}

17
scripts/mod/modpost.c
View file

@ -337,17 +337,20 @@ static void sym_update_crc(const char *name, struct module *mod,
void *grab_file(const char *filename, unsigned long *size)
{
struct stat st;
void *map;
void *map = MAP_FAILED;
int fd;
fd = open(filename, O_RDONLY);
if (fd < 0 || fstat(fd, &st) != 0)
if (fd < 0)
return NULL;
if (fstat(fd, &st))
goto failed;
*size = st.st_size;
map = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
close(fd);
failed:
close(fd);
if (map == MAP_FAILED)
return NULL;
return map;
@ -1850,14 +1853,14 @@ static void add_header(struct buffer *b, struct module *mod)
buf_printf(b, "\n");
buf_printf(b, "struct module __this_module\n");
buf_printf(b, "__attribute__((section(\".gnu.linkonce.this_module\"))) = {\n");
buf_printf(b, " .name = KBUILD_MODNAME,\n");
buf_printf(b, "\t.name = KBUILD_MODNAME,\n");
if (mod->has_init)
buf_printf(b, " .init = init_module,\n");
buf_printf(b, "\t.init = init_module,\n");
if (mod->has_cleanup)
buf_printf(b, "#ifdef CONFIG_MODULE_UNLOAD\n"
" .exit = cleanup_module,\n"
"\t.exit = cleanup_module,\n"
"#endif\n");
buf_printf(b, " .arch = MODULE_ARCH_INIT,\n");
buf_printf(b, "\t.arch = MODULE_ARCH_INIT,\n");
buf_printf(b, "};\n");
}