diff options
| author |   Armin Kuster <akuster@mvista.com> | 2016-02-10 12:28:21 -0800 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2016-02-11 22:32:17 +0000 |
| commit | bbc41337d28cc54d115378d4cad32f7b1c6f6cd5 (patch) | |
| tree | 8077fc8229b217a115472a380e00f837f11f8c8b | |
| parent | b26634900d487a22eef41e9e077d35fb347d4c29 (diff) | |
| download | openembedded-core-contrib-bbc41337d28cc54d115378d4cad32f7b1c6f6cd5.tar.gz | |
qemu: Security fix CVE-2016-2197
CVE-2016-2197 Qemu: ide: ahci null pointer dereference when using FIS CLB engines
Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu/CVE-2016-2197.patch | 59 | ||||
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu_2.5.0.bb | 1 |
2 files changed, 60 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2016-2197.patch b/meta/recipes-devtools/qemu/qemu/CVE-2016-2197.patch new file mode 100644 index 0000000000..946435c430 --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/CVE-2016-2197.patch @@ -0,0 +1,59 @@ +From: Prasad J Pandit <address@hidden> + +When IDE AHCI emulation uses Frame Information Structures(FIS) +engine for data transfer, the mapped FIS buffer address is stored +in a static 'bounce.buffer'. When a request is made to map another +memory region, address_space_map() returns NULL because +'bounce.buffer' is in_use. It leads to a null pointer dereference +error while doing 'dma_memory_unmap'. Add a check to avoid it. + +Reported-by: Zuozhi fzz <address@hidden> +Signed-off-by: Prasad J Pandit <address@hidden> + +Upstream-Status: Backport +https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg05740.html + +CVE: CVE-2016-2197 +Signed-off-by: Armin Kuster <akuster@mvista.com> + +--- + hw/ide/ahci.c | 16 ++++++++++------ + 1 file changed, 10 insertions(+), 6 deletions(-) + + Update as per review + -> https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg05715.html + +Index: qemu-2.5.0/hw/ide/ahci.c +=================================================================== +--- qemu-2.5.0.orig/hw/ide/ahci.c ++++ qemu-2.5.0/hw/ide/ahci.c +@@ -661,9 +661,11 @@ static bool ahci_map_fis_address(AHCIDev + + static void ahci_unmap_fis_address(AHCIDevice *ad) + { +- dma_memory_unmap(ad->hba->as, ad->res_fis, 256, +- DMA_DIRECTION_FROM_DEVICE, 256); +- ad->res_fis = NULL; ++ if (ad->res_fis) { ++ dma_memory_unmap(ad->hba->as, ad->res_fis, 256, ++ DMA_DIRECTION_FROM_DEVICE, 256); ++ ad->res_fis = NULL; ++ } + } + + static bool ahci_map_clb_address(AHCIDevice *ad) +@@ -677,9 +679,11 @@ static bool ahci_map_clb_address(AHCIDev + + static void ahci_unmap_clb_address(AHCIDevice *ad) + { +- dma_memory_unmap(ad->hba->as, ad->lst, 1024, +- DMA_DIRECTION_FROM_DEVICE, 1024); +- ad->lst = NULL; ++ if (ad->lst) { ++ dma_memory_unmap(ad->hba->as, ad->lst, 1024, ++ DMA_DIRECTION_FROM_DEVICE, 1024); ++ ad->lst = NULL; ++ } + } + + static void ahci_write_fis_sdb(AHCIState *s, NCQTransferState *ncq_tfs) diff --git a/meta/recipes-devtools/qemu/qemu_2.5.0.bb b/meta/recipes-devtools/qemu/qemu_2.5.0.bb index e51ec16882..3e7df2f836 100644 --- a/meta/recipes-devtools/qemu/qemu_2.5.0.bb +++ b/meta/recipes-devtools/qemu/qemu_2.5.0.bb @@ -8,6 +8,7 @@ SRC_URI += "file://configure-fix-Darwin-target-detection.patch \ file://Qemu-Arm-versatilepb-Add-memory-size-checking.patch \ file://no-valgrind.patch \ file://CVE-2016-1568.patch \ + file://CVE-2016-2197.patch \ " SRC_URI_prepend = "http://wiki.qemu-project.org/download/${BP}.tar.bz2" SRC_URI[md5sum] = "f469f2330bbe76e3e39db10e9ac4f8db" |