[PATCH v2 0/6] hw/sd: sdhci: Fixes to CVE-2020-17380, CVE-2020-25085, CVE-2021-3409

[Bin Meng <bmeng.cn@gmail.com>]

This series includes several fixes to CVE-2020-17380, CVE-2020-25085
and CVE-2021-3409 that are heap-based buffer overflow issues existing
in the sdhci model.

These CVEs are pretty much similar, and were filed using different
reproducers. With this series, current known reproducers I have
cannot be reproduced any more.

The implementation of this model still has some issues, e.g.: some codes
do not seem to strictly match the spec, but since this series only aimes
to address CVEs, such issue should be fixed in a separate series in the
future, if I have time :)

Changes in v2:
- new patch: sdhci: Limit block size only when SDHC_BLKSIZE register is writable
- new patch: sdhci: Reset the data pointer of s->fifo_buffer[] when a different block size is programmed

Bin Meng (6):
  hw/sd: sdhci: Don't transfer any data when command time out
  hw/sd: sdhci: Don't write to SDHC_SYSAD register when transfer is in
    progress
  hw/sd: sdhci: Correctly set the controller status for ADMA
  hw/sd: sdhci: Simplify updating s->prnsts in
    sdhci_sdma_transfer_multi_blocks()
  hw/sd: sdhci: Limit block size only when SDHC_BLKSIZE register is
    writable
  hw/sd: sdhci: Reset the data pointer of s->fifo_buffer[] when a
    different block size is programmed

 hw/sd/sdhci.c | 60 ++++++++++++++++++++++++++++++++++++++---------------------
 1 file changed, 39 insertions(+), 21 deletions(-)

-- 
2.7.4