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author | Patrick Williams <patrick@stwcx.xyz> | 2016-03-30 15:21:19 -0500 |
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committer | Patrick Williams <patrick@stwcx.xyz> | 2016-03-30 15:21:19 -0500 |
commit | b4a027550acf2c1051c34f997b8e7e845017af4b (patch) | |
tree | 9e38d3c17b42cb1e6765620a87e908973a93c821 /yocto-poky/meta/recipes-devtools/qemu/qemu/CVE-2016-2197.patch | |
parent | 2fe86d90044af218ced8f42fdded6b136f1046d2 (diff) | |
parent | f1e5d6968976c2341c6d554bfcc8895f1b33c26b (diff) | |
download | talos-openbmc-b4a027550acf2c1051c34f997b8e7e845017af4b.tar.gz talos-openbmc-b4a027550acf2c1051c34f997b8e7e845017af4b.zip |
Merge commit 'f1e5d6968976c2341c6d554bfcc8895f1b33c26b' from yocto-2.0.1
Diffstat (limited to 'yocto-poky/meta/recipes-devtools/qemu/qemu/CVE-2016-2197.patch')
-rw-r--r-- | yocto-poky/meta/recipes-devtools/qemu/qemu/CVE-2016-2197.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/yocto-poky/meta/recipes-devtools/qemu/qemu/CVE-2016-2197.patch b/yocto-poky/meta/recipes-devtools/qemu/qemu/CVE-2016-2197.patch new file mode 100644 index 000000000..946435c43 --- /dev/null +++ b/yocto-poky/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) |