diff options
Diffstat (limited to 'meta/recipes-devtools/qemu/qemu/CVE-2021-3409_6.patch')
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu/CVE-2021-3409_6.patch | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2021-3409_6.patch b/meta/recipes-devtools/qemu/qemu/CVE-2021-3409_6.patch new file mode 100644 index 0000000000..624c1f6496 --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/CVE-2021-3409_6.patch @@ -0,0 +1,99 @@ +From db916870a839346767b6d5ca7d0eed3128ba5fea Mon Sep 17 00:00:00 2001 +From: Bin Meng <bmeng.cn@gmail.com> +Date: Wed, 3 Mar 2021 20:26:39 +0800 +Subject: [PATCH 6/6] hw/sd: sdhci: Reset the data pointer of s->fifo_buffer[] + when a different block size is programmed +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +If the block size is programmed to a different value from the +previous one, reset the data pointer of s->fifo_buffer[] so that +s->fifo_buffer[] can be filled in using the new block size in +the next transfer. + +With this fix, the following reproducer: + +outl 0xcf8 0x80001010 +outl 0xcfc 0xe0000000 +outl 0xcf8 0x80001001 +outl 0xcfc 0x06000000 +write 0xe000002c 0x1 0x05 +write 0xe0000005 0x1 0x02 +write 0xe0000007 0x1 0x01 +write 0xe0000028 0x1 0x10 +write 0x0 0x1 0x23 +write 0x2 0x1 0x08 +write 0xe000000c 0x1 0x01 +write 0xe000000e 0x1 0x20 +write 0xe000000f 0x1 0x00 +write 0xe000000c 0x1 0x32 +write 0xe0000004 0x2 0x0200 +write 0xe0000028 0x1 0x00 +write 0xe0000003 0x1 0x40 + +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> +Signed-off-by: Bin Meng <bmeng.cn@gmail.com> +Message-Id: <20210303122639.20004-6-bmeng.cn@gmail.com> +Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> + +Upstream-Status: Backport [cffb446e8fd19a14e1634c7a3a8b07be3f01d5c9] +CVE: CVE-2021-3409 + +Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com> +--- + hw/sd/sdhci.c | 12 ++++++++++++ + 1 file changed, 12 insertions(+) + +diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c +index 6c780126e..216842420 100644 +--- a/hw/sd/sdhci.c ++++ b/hw/sd/sdhci.c +@@ -1140,6 +1140,8 @@ sdhci_write(void *opaque, hwaddr offset, uint64_t val, unsigned size) + break; + case SDHC_BLKSIZE: + if (!TRANSFERRING_DATA(s->prnsts)) { ++ uint16_t blksize = s->blksize; ++ + MASKED_WRITE(s->blksize, mask, extract32(value, 0, 12)); + MASKED_WRITE(s->blkcnt, mask >> 16, value >> 16); + +@@ -1151,6 +1153,16 @@ sdhci_write(void *opaque, hwaddr offset, uint64_t val, unsigned size) + + s->blksize = deposit32(s->blksize, 0, 12, s->buf_maxsz); + } ++ ++ /* ++ * If the block size is programmed to a different value from ++ * the previous one, reset the data pointer of s->fifo_buffer[] ++ * so that s->fifo_buffer[] can be filled in using the new block ++ * size in the next transfer. ++ */ ++ if (blksize != s->blksize) { ++ s->data_count = 0; ++ } + } + + break; +-- +2.29.2 + |