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| author | Rusty Russell <rusty@rustcorp.com.au> | 2008-05-09 16:24:21 +1000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-09 07:45:18 -0700 |
| commit | a5dd69707424a35d2d2cc094e870f595ad61e916 (patch) | |
| tree | dd9dffe6748358bac9a8699f7d8ad9e205886a67 /kernel | |
| parent | 6c2545eefffc452e52302c96c955d9aa26353aa9 (diff) | |
| download | lwn-a5dd69707424a35d2d2cc094e870f595ad61e916.tar.gz lwn-a5dd69707424a35d2d2cc094e870f595ad61e916.zip | |
module: be more picky about allowing missing module versions
We allow missing __versions sections, because modprobe --force strips
it. It makes less sense to allow sections where there's no version
for a specific symbol the module uses, so disallow that.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/module.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/kernel/module.c b/kernel/module.c index 8e4528c9909f..2584c0e2762d 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -917,6 +917,10 @@ static int check_version(Elf_Shdr *sechdrs, if (!crc) return 1; + /* No versions at all? modprobe --force does this. */ + if (versindex == 0) + return try_to_force_load(mod, symname) == 0; + versions = (void *) sechdrs[versindex].sh_addr; num_versions = sechdrs[versindex].sh_size / sizeof(struct modversion_info); @@ -932,8 +936,9 @@ static int check_version(Elf_Shdr *sechdrs, goto bad_version; } - if (!try_to_force_load(mod, symname)) - return 1; + printk(KERN_WARNING "%s: no symbol version for %s\n", + mod->name, symname); + return 0; bad_version: printk("%s: disagrees about version of symbol %s\n", |