From a4e8d9f5f957c7e3972ca9d25f17de5f8acd8244 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Wed, 28 Jul 2010 23:45:03 -0400
Subject: [PATCH] flash_protect: check for NULL flash info
If a flash is unable to be detected, and then someone calls flash_protect
on it (like the common code does in flash_init), the flash_protect logic
will dereference a NULL pointer.
Since flash_protect already does sanity checking on the info structs, add
a NULL pointer check in there.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
common/flash.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/common/flash.c b/common/flash.c
index eb4b2f5ff1..683978e473 100644
--- a/common/flash.c
+++ b/common/flash.c
@@ -43,15 +43,18 @@ extern flash_info_t flash_info[]; /* info for FLASH chips */
void
flash_protect (int flag, ulong from, ulong to, flash_info_t *info)
{
- ulong b_end = info->start[0] + info->size - 1; /* bank end address */
- short s_end = info->sector_count - 1; /* index of last sector */
+ ulong b_end;
+ short s_end;
int i;
/* Do nothing if input data is bad. */
- if (info->sector_count == 0 || info->size == 0 || to < from) {
+ if (!info || info->sector_count == 0 || info->size == 0 || to < from) {
return;
}
+ s_end = info->sector_count - 1; /* index of last sector */
+ b_end = info->start[0] + info->size - 1; /* bank end address */
+
debug ("flash_protect %s: from 0x%08lX to 0x%08lX\n",
(flag & FLAG_PROTECT_SET) ? "ON" :
(flag & FLAG_PROTECT_CLEAR) ? "OFF" : "???",
--
2.39.5