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Message-Id: <20240309214826.work.449-kees@kernel.org>
Date: Sat, 9 Mar 2024 13:48:30 -0800
From: Kees Cook <keescook@...omium.org>
To: Eric Biederman <ebiederm@...ssion.com>
Cc: Kees Cook <keescook@...omium.org>,
Alexander Viro <viro@...iv.linux.org.uk>,
Christian Brauner <brauner@...nel.org>,
Jan Kara <jack@...e.cz>,
linux-mm@...ck.org,
linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-hardening@...r.kernel.org
Subject: [PATCH] exec: Simplify remove_arg_zero() error path
We don't need the "out" label any more, so remove "ret" and return
directly on error.
Signed-off-by: Kees Cook <keescook@...omium.org>
---
Cc: Eric Biederman <ebiederm@...ssion.com>
Cc: Alexander Viro <viro@...iv.linux.org.uk>
Cc: Christian Brauner <brauner@...nel.org>
Cc: Jan Kara <jack@...e.cz>
Cc: linux-mm@...ck.org
Cc: linux-fsdevel@...r.kernel.org
---
fs/exec.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/fs/exec.c b/fs/exec.c
index 715e1a8aa4f0..e7d9d6ad980b 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1720,7 +1720,6 @@ static int prepare_binprm(struct linux_binprm *bprm)
*/
int remove_arg_zero(struct linux_binprm *bprm)
{
- int ret = 0;
unsigned long offset;
char *kaddr;
struct page *page;
@@ -1731,10 +1730,8 @@ int remove_arg_zero(struct linux_binprm *bprm)
do {
offset = bprm->p & ~PAGE_MASK;
page = get_arg_page(bprm, bprm->p, 0);
- if (!page) {
- ret = -EFAULT;
- goto out;
- }
+ if (!page)
+ return -EFAULT;
kaddr = kmap_local_page(page);
for (; offset < PAGE_SIZE && kaddr[offset];
@@ -1748,8 +1745,7 @@ int remove_arg_zero(struct linux_binprm *bprm)
bprm->p++;
bprm->argc--;
-out:
- return ret;
+ return 0;
}
EXPORT_SYMBOL(remove_arg_zero);
--
2.34.1
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