"Luis R. Rodriguez" <mcg...@kernel.org> writes:
> OK -- if userspace messes up again it may be a bit hard to prove
> unless we have a validation debug thing in place, would such a thing
> in debug form be reasonable ?
That makes perfect sense. Untested hack:
diff --git a/fs/filesystems.c b/fs/filesystems.c
index c5618db110be..e5c90e80c7d3 100644
--- a/fs/filesystems.c
+++ b/fs/filesystems.c
@@ -275,9 +275,10 @@ struct file_system_type *get_fs_type(const char *name)
int len = dot ? dot - name : strlen(name);
fs = __get_fs_type(name, len);
- if (!fs && (request_module("fs-%.*s", len, name) == 0))
+ if (!fs && (request_module("fs-%.*s", len, name) == 0)) {
fs = __get_fs_type(name, len);
-
+ WARN_ONCE(!fs, "request_module fs-%.*s succeeded, but still no
fs?\n", len, name);
+ }
if (dot && fs && !(fs->fs_flags & FS_HAS_SUBTYPE)) {
put_filesystem(fs);
fs = NULL;
Maybe a similar hack for try_then_request_module(), but many places seem
to open-code request_module() so it's not as trivial...
Cheers,
Rusty.
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