This is a note to let you know that I've just added the patch titled
module/decompress: Fix error checking on zstd decompression
to the 6.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
module-decompress-fix-error-checking-on-zstd-decompression.patch
and it can be found in the queue-6.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fadb74f9f2f609238070c7ca1b04933dc9400e4a Mon Sep 17 00:00:00 2001
From: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
Date: Thu, 1 Jun 2023 14:23:31 -0700
Subject: module/decompress: Fix error checking on zstd decompression
From: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
commit fadb74f9f2f609238070c7ca1b04933dc9400e4a upstream.
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: 169a58ad824d ("module/decompress: Support zstd in-kernel decompression")
Cc: stable@xxxxxxxxxx
Cc: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Cc: Stephen Boyd <swboyd@xxxxxxxxxxxx>
Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/module/decompress.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/module/decompress.c b/kernel/module/decompress.c
index e97232b125eb..8a5d6d63b06c 100644
--- a/kernel/module/decompress.c
+++ b/kernel/module/decompress.c
@@ -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;
}
--
2.41.0
Patches currently in stable-queue which might be from lucas.demarchi@xxxxxxxxx are
queue-6.3/module-decompress-fix-error-checking-on-zstd-decompression.patch
