File hw-sd-sd-Actually-perform-the-erase-oper.patch of Package qemu.29315
From: Bin Meng <bin.meng@windriver.com>
Date: Sat, 20 Feb 2021 16:58:13 +0800
Subject: hw/sd: sd: Actually perform the erase operation
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Git-commit: 818a5cdcfcf0a55d60b59b2cb74482ef4ba6b205
References: bsc#1175144, CVE-2020-17380, bsc#1176681, CVE-2020-25085
References: bsc#1182282, CVE-2021-3409
At present the sd_erase() does not erase the requested range of card
data to 0xFFs. Let's make the erase operation actually happen.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Message-Id: <1613811493-58815-1-git-send-email-bmeng.cn@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
hw/sd/sd.c | 22 +++++++++++++---------
1 file changed, 13 insertions(+), 9 deletions(-)
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 6719cda1a0db8e6afa04c2b23915..26a5ae4d202656b4d04547cac8b8 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -779,10 +779,12 @@ static void sd_blk_write(SDState *sd, uint64_t addr, uint32_t len)
static void sd_erase(SDState *sd)
{
- int i;
uint64_t erase_start = sd->erase_start;
uint64_t erase_end = sd->erase_end;
bool sdsc = true;
+ uint64_t wpnum;
+ uint64_t erase_addr;
+ int erase_len = 1 << HWBLOCK_SHIFT;
trace_sdcard_erase(sd->erase_start, sd->erase_end);
if (sd->erase_start == INVALID_ADDRESS
@@ -811,17 +813,19 @@ static void sd_erase(SDState *sd)
sd->erase_end = INVALID_ADDRESS;
sd->csd[14] |= 0x40;
- /* Only SDSC cards support write protect groups */
- if (sdsc) {
- erase_start = sd_addr_to_wpnum(erase_start);
- erase_end = sd_addr_to_wpnum(erase_end);
-
- for (i = erase_start; i <= erase_end; i++) {
- assert(i < sd->wpgrps_size);
- if (test_bit(i, sd->wp_groups)) {
+ memset(sd->data, 0xff, erase_len);
+ for (erase_addr = erase_start; erase_addr <= erase_end;
+ erase_addr += erase_len) {
+ if (sdsc) {
+ /* Only SDSC cards support write protect groups */
+ wpnum = sd_addr_to_wpnum(erase_addr);
+ assert(wpnum < sd->wpgrps_size);
+ if (test_bit(wpnum, sd->wp_groups)) {
sd->card_status |= WP_ERASE_SKIP;
+ continue;
}
}
+ BLK_WRITE_BLOCK(erase_addr, erase_len);
}
}