[PATCH v2 1/3] fs/exec: don't force writing memory access

[Jann Horn]

This shouldn't change behavior in any way - at this point, there should be
no non-writable mappings, only the initial stack mapping -, but this change
makes it easier to reason about the correctness of the following commits
that place restrictions on forced memory writes.

Signed-off-by: Jann Horn <jann@xxxxxxxxx>
Reviewed-by: Janis Danisevskis <jdanis@xxxxxxxxxxx>
---
 fs/exec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/exec.c b/fs/exec.c
index 6fcfb3f..d607da8 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -204,7 +204,7 @@ static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos,
 	 * doing the exec and bprm->mm is the new process's mm.
 	 */
 	ret = get_user_pages_remote(current, bprm->mm, pos, 1, write,
-			1, &page, NULL);
+			0, &page, NULL);
 	if (ret <= 0)
 		return NULL;
 
-- 
2.1.4