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module/decompress: Fix error checking on zstd decompression 

While implementing support for in-kernel decompression in kmod,
finit_module() was returning a very suspicious value:

	finit_module(3, "", MODULE_INIT_COMPRESSED_FILE) = 18446744072717407296

It turns out the check for module_get_next_page() failing is wrong,
and hence the decompression was not really taking place. Invert
the condition to fix it.

Fixes: 169a58ad82 ("module/decompress: Support zstd in-kernel decompression")
Cc: stable@kernel.org
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
This commit is contained in:
Lucas De Marchi 2023-06-01 14:23:31 -07:00 committed by Luis Chamberlain
parent db3e33dd8b
commit fadb74f9f2
1 changed files with 1 additions and 1 deletions
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2
kernel/module/decompress.c
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@ -257,7 +257,7 @@ static ssize_t module_zstd_decompress(struct load_info *info,
do {
struct page *page = module_get_next_page(info);
if (!IS_ERR(page)) {
if (IS_ERR(page)) {
retval = PTR_ERR(page);
goto out;
}