The patch titled
Subject: exec-separate-mm_anonpages-and-rlimit_stack-accounting-fix
has been added to the -mm tree. Its filename is
exec-separate-mm_anonpages-and-rlimit_stack-accounting-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/exec-separate-mm_anonpages-and-rlimit_stack-accounting-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/exec-separate-mm_anonpages-and-rlimit_stack-accounting-fix.patch
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------------------------------------------------------
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Subject: exec-separate-mm_anonpages-and-rlimit_stack-accounting-fix
I forgot about the !CONFIG_MMU version of get_arg_page() which doesn't
check RLIMIT_STACK at all.
Link: http://lkml.kernel.org/r/20181126122307.GA1660@xxxxxxxxxx
Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/fs/exec.c~exec-separate-mm_anonpages-and-rlimit_stack-accounting-fix
+++ a/fs/exec.c
@@ -527,8 +527,10 @@ static int copy_strings(int argc, struct
pos = bprm->p;
str += len;
bprm->p -= len;
+#ifdef CONFIG_MMU
if (bprm->p < bprm->argmin)
goto out;
+#endif
while (len > 0) {
int offset, bytes_to_copy;
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
exec-load_script-dont-blindly-truncate-shebang-string.patch
exec-increase-binprm_buf_size-to-256.patch
exec-separate-mm_anonpages-and-rlimit_stack-accounting.patch
exec-separate-mm_anonpages-and-rlimit_stack-accounting-fix.patch
