From 84816fb63e5c57159b469a66052d1b2bc862ef77 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Philippe=20Mathieu-Daud=C3=A9?= <f4bug@amsat.org>
Date: Fri, 18 Sep 2020 19:14:52 +0200
Subject: [PATCH] hw/sd/sdcard: Assert if accessing an illegal group
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We can not have more group than 'wpgrps_size'.
Assert if we are accessing a group above this limit.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Alexander Bulekov <alxndr@bu.edu>
Message-Id: <20201015063824.212980-7-f4bug@amsat.org>
---
hw/sd/sd.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 4454d168e2..c3febed243 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -780,6 +780,7 @@ static void sd_erase(SDState *sd)
sd->csd[14] |= 0x40;
for (i = erase_start; i <= erase_end; i++) {
+ assert(i < sd->wpgrps_size);
if (test_bit(i, sd->wp_groups)) {
sd->card_status |= WP_ERASE_SKIP;
}
@@ -794,6 +795,7 @@ static uint32_t sd_wpbits(SDState *sd, uint64_t addr)
wpnum = sd_addr_to_wpnum(addr);
for (i = 0; i < 32; i++, wpnum++, addr += WPGROUP_SIZE) {
+ assert(wpnum < sd->wpgrps_size);
if (addr < sd->size && test_bit(wpnum, sd->wp_groups)) {
ret |= (1 << i);
}
--
2.30.2