On 2/16/21 4:46 AM, Bin Meng wrote: > 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-sta...@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 <alx...@bu.edu> > Reported-by: Cornelius Aschermann (Ruhr-University Bochum) > Reported-by: Muhammad Ramdhan > Reported-by: Sergej Schumilo (Ruhr-University Bochum) > Reported-by: Simon Wrner (Ruhr-University 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 > Signed-off-by: Bin Meng <bmeng...@gmail.com> > --- > > (no changes since v1) > > hw/sd/sdhci.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c > index 05cb281..0b0ca6f 100644 > --- a/hw/sd/sdhci.c > +++ b/hw/sd/sdhci.c > @@ -769,7 +769,9 @@ 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); > @@ -797,6 +799,7 @@ static void sdhci_do_adma(SDHCIState *s) > } > } > } else { > + s->prnsts |= SDHC_DOING_WRITE; > while (length) { > begin = s->data_count; > if ((length + begin) < block_size) {
Nice fix. Reviewed-by: Philippe Mathieu-Daudé <f4...@amsat.org>
