39 lines
1.3 KiB
Diff
39 lines
1.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Gen Zhang <blackgod016574@gmail.com>
|
|
Date: Thu, 23 May 2019 08:34:52 +0800
|
|
Subject: [PATCH] consolemap: Fix a memory leaking bug in
|
|
drivers/tty/vt/consolemap.c
|
|
|
|
In function con_insert_unipair(), when allocation for p2 and p1[n]
|
|
fails, ENOMEM is returned, but previously allocated p1 is not freed,
|
|
remains as leaking memory. Thus we should free p1 as well when this
|
|
allocation fails.
|
|
|
|
Signed-off-by: Gen Zhang <blackgod016574@gmail.com>
|
|
Reviewed-by: Kees Cook <keescook@chromium.org>
|
|
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
---
|
|
drivers/tty/vt/consolemap.c | 6 +++++-
|
|
1 file changed, 5 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c
|
|
index b28aa0d289f8..79fcc96cc7c0 100644
|
|
--- a/drivers/tty/vt/consolemap.c
|
|
+++ b/drivers/tty/vt/consolemap.c
|
|
@@ -489,7 +489,11 @@ con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos)
|
|
p2 = p1[n = (unicode >> 6) & 0x1f];
|
|
if (!p2) {
|
|
p2 = p1[n] = kmalloc_array(64, sizeof(u16), GFP_KERNEL);
|
|
- if (!p2) return -ENOMEM;
|
|
+ if (!p2) {
|
|
+ kfree(p1);
|
|
+ p->uni_pgdir[n] = NULL;
|
|
+ return -ENOMEM;
|
|
+ }
|
|
memset(p2, 0xff, 64*sizeof(u16)); /* No glyphs for the characters (yet) */
|
|
}
|
|
|
|
--
|
|
https://clearlinux.org
|
|
|