diff options
Diffstat (limited to 'meta/recipes-devtools/qemu/qemu/CVE-2020-35505.patch')
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu/CVE-2020-35505.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2020-35505.patch b/meta/recipes-devtools/qemu/qemu/CVE-2020-35505.patch new file mode 100644 index 0000000000..40c0b1e74f --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/CVE-2020-35505.patch @@ -0,0 +1,45 @@ +Backport of: + +From 99545751734035b76bd372c4e7215bb337428d89 Mon Sep 17 00:00:00 2001 +From: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> +Date: Wed, 7 Apr 2021 20:57:55 +0100 +Subject: [PATCH] esp: ensure cmdfifo is not empty and current_dev is non-NULL +MIME-Version: 1.0 +Content-Type: text/plain; charset=utf8 +Content-Transfer-Encoding: 8bit + +When about to execute a SCSI command, ensure that cmdfifo is not empty and +current_dev is non-NULL. This can happen if the guest tries to execute a TI +(Transfer Information) command without issuing one of the select commands +first. + +Buglink: https://bugs.launchpad.net/qemu/+bug/1910723 +Buglink: https://bugs.launchpad.net/qemu/+bug/1909247 +Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> +Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> +Tested-by: Alexander Bulekov <alxndr@bu.edu> +Message-Id: <20210407195801.685-7-mark.cave-ayland@ilande.co.uk> + +CVE: CVE-2020-35505 +Upstream-Status: Backport [import from ubuntu https://git.launchpad.net/ubuntu/+source/qemu/tree/debian/patches/CVE-2020-35505.patch?h=ubuntu/focal-security Upstream commit https://github.com/qemu/qemu/commit/99545751734035b76bd372c4e7215bb337428d89 ] +Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com> +Signed-off-by: Emily Vekariya <emily.vekariya@einfochips.com> +--- + hw/scsi/esp.c | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c +index c7d701bf..c2a67bc8 100644 +--- a/hw/scsi/esp.c ++++ b/hw/scsi/esp.c +@@ -193,6 +193,10 @@ static void do_busid_cmd(ESPState *s, uint8_t *buf, uint8_t busid) + + trace_esp_do_busid_cmd(busid); + lun = busid & 7; ++ ++ if (!s->current_dev) { ++ return; ++ } + current_lun = scsi_device_find(&s->bus, 0, s->current_dev->id, lun); + s->current_req = scsi_req_new(current_lun, 0, lun, buf, s); + datalen = scsi_req_enqueue(s->current_req); |