File 0245-hw-sd-sdhci-Correctly-set-the-contr.patch of Package qemu-linux-user.26284

Overview Repositories Revisions Requests Users Attributes Meta

File 0245-hw-sd-sdhci-Correctly-set-the-contr.patch of Package qemu-linux-user.26284

From: Bin Meng <bmeng.cn@gmail.com>
Date: Wed, 3 Mar 2021 20:26:37 +0800
Subject: hw/sd: sdhci: Correctly set the controller status for ADMA
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Git-commit: bc6f28995ff88f5d82c38afcfd65406f0ae375aa
References: bsc#1175144, CVE-2020-17380; bsc#1182282, CVE-2021-3409

When an ADMA transfer is started, the codes forget to set the
controller status to indicate a transfer is in progress.

With this fix, the following 2 reproducers:

https://paste.debian.net/plain/1185136
https://paste.debian.net/plain/1185141

cannot be reproduced with the following QEMU command line:

$ qemu-system-x86_64 -nographic -machine accel=qtest -m 512M \
      -nodefaults -device sdhci-pci,sd-spec-version=3 \
      -drive if=sd,index=0,file=null-co://,format=raw,id=mydrive \
      -device sd-card,drive=mydrive -qtest stdio

Cc: qemu-stable@nongnu.org
Fixes: CVE-2020-17380
Fixes: CVE-2020-25085
Fixes: CVE-2021-3409
Fixes: d7dfca0807a0 ("hw/sdhci: introduce standard SD host controller")
Reported-by: Alexander Bulekov <alxndr@bu.edu>
Reported-by: Cornelius Aschermann (Ruhr-Universität Bochum)
Reported-by: Sergej Schumilo (Ruhr-Universität Bochum)
Reported-by: Simon Wörner (Ruhr-Universität Bochum)
Buglink: https://bugs.launchpad.net/qemu/+bug/1892960
Buglink: https://bugs.launchpad.net/qemu/+bug/1909418
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1928146
Tested-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Message-Id: <20210303122639.20004-4-bmeng.cn@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Dario Faggioli <dfaggioli@suse.com>
---
 hw/sd/sdhci.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
index f7ba13cccdcc5f417b8101aa1e2f..f0f1e30d4fb890ff41d9a1d9af14 100644
--- a/hw/sd/sdhci.c
+++ b/hw/sd/sdhci.c
@@ -791,8 +791,9 @@ static void sdhci_do_adma(SDHCIState *s)
 
         switch (dscr.attr & SDHC_ADMA_ATTR_ACT_MASK) {
         case SDHC_ADMA_ATTR_ACT_TRAN:  /* data transfer */
-
+            s->prnsts |= SDHC_DATA_INHIBIT | SDHC_DAT_LINE_ACTIVE;
             if (s->trnmod & SDHC_TRNS_READ) {
+                s->prnsts |= SDHC_DOING_READ;
                 while (length) {
                     if (s->data_count == 0) {
                         for (n = 0; n < block_size; n++) {
@@ -822,6 +823,7 @@ static void sdhci_do_adma(SDHCIState *s)
                     }
                 }
             } else {
+                s->prnsts |= SDHC_DOING_WRITE;
                 while (length) {
                     begin = s->data_count;
                     if ((length + begin) < block_size) {

Places

File 0245-hw-sd-sdhci-Correctly-set-the-contr.patch of Package qemu-linux-user.26284

Places