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Accepting request 961858 from home:lizhang:branches:Virtualization

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Fix bsc#1189702 CVE-2021-3713
* Patches added:
  hw-nvram-at24-return-0xff-if-1-byte-addr.patch

OBS-URL: https://build.opensuse.org/request/show/961858
OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=694
This commit is contained in:
Li Zhang 2022-03-15 11:41:22 +00:00 committed by Git OBS Bridge
parent c977c5d4a8
commit 29a74282dc
4 changed files with 63 additions and 2 deletions
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4
bundles.tar.xz
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@ -1,3 +1,3 @@
version https://git-lfs.github.com/spec/v1
oid sha256:15c93c65a944d8c0bfb4e22bbc9b0cdcca5b380f6e93e41d750b4c149bee72aa
size 78080
oid sha256:593a0eac10d5084f791cd4723ec9508b04d67c936369f8f83db7ccd4ccdb04d5
size 78808

53
hw-nvram-at24-return-0xff-if-1-byte-addr.patch Normal file
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@ -0,0 +1,53 @@
From: Patrick Venture <venture@google.com>
Date: Mon, 20 Dec 2021 13:21:37 -0800
Subject: hw/nvram: at24 return 0xff if 1 byte address
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Git-commit: 1cbab82e9d1bdb2c7b9ef46a396fdc03ea3fa04c
References: bsc#1193880 CVE-2021-3929
The at24 eeproms are 2 byte devices that return 0xff when they are read
from with a partial (1-byte) address written. This distinction was
found comparing model behavior to real hardware testing.
Tested: `i2ctransfer -f -y 45 w1@85 0 r1` returns 0xff instead of next
byte
Signed-off-by: Patrick Venture <venture@google.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211220212137.1244511-1-venture@google.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Li Zhang <lizhang@suse.de>
---
hw/nvram/eeprom_at24c.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/hw/nvram/eeprom_at24c.c b/hw/nvram/eeprom_at24c.c
index af6f5dbb998475871b4defb59c47..b956b8e2b2d9d74a1bc61bc16eb9 100644
--- a/hw/nvram/eeprom_at24c.c
+++ b/hw/nvram/eeprom_at24c.c
@@ -58,9 +58,10 @@ int at24c_eeprom_event(I2CSlave *s, enum i2c_event event)
switch (event) {
case I2C_START_SEND:
- case I2C_START_RECV:
case I2C_FINISH:
ee->haveaddr = 0;
+ /* fallthrough */
+ case I2C_START_RECV:
DPRINTK("clear\n");
if (ee->blk && ee->changed) {
int len = blk_pwrite(ee->blk, 0, ee->mem, ee->rsize, 0);
@@ -84,6 +85,10 @@ uint8_t at24c_eeprom_recv(I2CSlave *s)
EEPROMState *ee = AT24C_EE(s);
uint8_t ret;
+ if (ee->haveaddr == 1) {
+ return 0xff;
+ }
+
ret = ee->mem[ee->cur];
ee->cur = (ee->cur + 1u) % ee->rsize;

6
qemu.changes
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@ -1,3 +1,9 @@
-------------------------------------------------------------------
Tue Mar 15 09:58:18 UTC 2022 - Li Zhang <li.zhang@suse.com>
Fix bsc#1189702 CVE-2021-3713
* Patches added:
hw-nvram-at24-return-0xff-if-1-byte-addr.patch
-------------------------------------------------------------------
Mon Mar 7 15:45:42 UTC 2022 - Dario Faggioli <dfaggioli@suse.com>

2
qemu.spec
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@ -215,6 +215,7 @@ Patch00068: iotests-declare-lack-of-support-for-comp.patch
Patch00069: block-backend-Retain-permissions-after-m.patch
Patch00070: virtiofsd-Drop-membership-of-all-supplem.patch
Patch00071: hw-scsi-megasas-check-for-NULL-frame-in-.patch
Patch00072: hw-nvram-at24-return-0xff-if-1-byte-addr.patch
# Patches applied in roms/seabios/:
Patch01000: seabios-use-python2-explicitly-as-needed.patch
Patch01001: seabios-switch-to-python3-as-needed.patch
@ -1206,6 +1207,7 @@ This package records qemu testsuite results and represents successful testing.
%patch00069 -p1
%patch00070 -p1
%patch00071 -p1
%patch00072 -p1
%patch01000 -p1
%patch01001 -p1
%patch01002 -p1