diff options
| author | Bin Meng | 2021-03-03 13:26:37 +0100 |
|---|---|---|
| committer | Philippe Mathieu-Daudé | 2021-03-22 16:56:13 +0100 |
| commit | bc6f28995ff88f5d82c38afcfd65406f0ae375aa (patch) | |
| tree | 10168c642eb5a3ac5bd2e11c9ee908d381a69244 /hw/sd | |
| parent | hw/sd: sdhci: Don't write to SDHC_SYSAD register when transfer is in progress (diff) | |
| download | qemu-bc6f28995ff88f5d82c38afcfd65406f0ae375aa.tar.gz qemu-bc6f28995ff88f5d82c38afcfd65406f0ae375aa.tar.xz qemu-bc6f28995ff88f5d82c38afcfd65406f0ae375aa.zip | |
hw/sd: sdhci: Correctly set the controller status for ADMA
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>
Diffstat (limited to 'hw/sd')
| -rw-r--r-- | hw/sd/sdhci.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c index 3feb6c3a1f..7a2003b28b 100644 --- a/hw/sd/sdhci.c +++ b/hw/sd/sdhci.c @@ -768,7 +768,9 @@ 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) { sdbus_read_data(&s->sdbus, s->fifo_buffer, block_size); @@ -796,6 +798,7 @@ static void sdhci_do_adma(SDHCIState *s) } } } else { + s->prnsts |= SDHC_DOING_WRITE; while (length) { begin = s->data_count; if ((length + begin) < block_size) { |