[PATCH] fs: binfmt_em86: check return code of remove_arg_zero

[Nick Desaulniers]

remove_arg_zero is declared as __must_check. Looks like it can return
-EFAULT on failure.

Cc: Masahiro Yamada <masahi...@kernel.org>
Cc: Miguel Ojeda <miguel.ojeda.sando...@gmail.com>
Reported-by: Guenter Roeck <li...@roeck-us.net>
Signed-off-by: Nick Desaulniers <ndesaulni...@google.com>
---
 fs/binfmt_em86.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/binfmt_em86.c b/fs/binfmt_em86.c
index 06b9b9fddf70..6e98fcfca66e 100644
--- a/fs/binfmt_em86.c
+++ b/fs/binfmt_em86.c
@@ -63,7 +63,8 @@ static int load_em86(struct linux_binprm *bprm)
         * This is done in reverse order, because of how the
         * user environment and arguments are stored.
         */
-       remove_arg_zero(bprm);
+       retval = remove_arg_zero(bprm);
+       if (retval < 0) return retval;
        retval = copy_string_kernel(bprm->filename, bprm);
        if (retval < 0) return retval; 
        bprm->argc++;
-- 
2.29.2.729.g45daf8777d-goog