exec: Fix incorrect type for ret

[ Upstream commit 5e088248375d171b80c643051e77ade6b97bc386 ]

In the setup_arg_pages(), ret is declared as an unsigned long.
The ret might take a negative value. Therefore, its type should
be changed to int.

Signed-off-by: Xichao Zhao <zhao.xichao@vivo.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20250825073609.219855-1-zhao.xichao@vivo.com
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/exec.c b/fs/exec.c
index a69a2673f631132db0032bebe082259478b529c8..1515e0585e259c09e59354ec184953f5afae5bf1 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -599,7 +599,7 @@ int setup_arg_pages(struct linux_binprm *bprm,
                    unsigned long stack_top,
                    int executable_stack)
 {
-       unsigned long ret;
+       int ret;
        unsigned long stack_shift;
        struct mm_struct *mm = current->mm;
        struct vm_area_struct *vma = bprm->vma;