diff options
Diffstat (limited to 'meta/recipes-devtools/qemu/qemu')
-rw-r--r-- | meta/recipes-devtools/qemu/qemu/pvrdma.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/pvrdma.patch b/meta/recipes-devtools/qemu/qemu/pvrdma.patch new file mode 100644 index 0000000000..7b0335b1dc --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/pvrdma.patch @@ -0,0 +1,45 @@ +hw/pvrdma: Protect against buggy or malicious guest driver + +Guest driver might execute HW commands when shared buffers are not yet +allocated. +This might happen on purpose (malicious guest) or because some other +guest/host address mapping. +We need to protect againts such case. + +Reported-by: Mauro Matteo Cascella <mcascell@redhat.com> +Signed-off-by: Yuval Shaia <yuval.shaia.ml@gmail.com> + +CVE: CVE-2022-1050 +Upstream-Status: Submitted [https://lists.nongnu.org/archive/html/qemu-devel/2022-03/msg05197.html] + +Index: qemu-6.2.0/hw/rdma/vmw/pvrdma_cmd.c +=================================================================== +--- qemu-6.2.0.orig/hw/rdma/vmw/pvrdma_cmd.c ++++ qemu-6.2.0/hw/rdma/vmw/pvrdma_cmd.c +@@ -796,6 +796,12 @@ int pvrdma_exec_cmd(PVRDMADev *dev) + + dsr_info = &dev->dsr_info; + ++ if (!dsr_info->dsr) { ++ /* Buggy or malicious guest driver */ ++ rdma_error_report("Exec command without dsr, req or rsp buffers"); ++ goto out; ++ } ++ + if (dsr_info->req->hdr.cmd >= sizeof(cmd_handlers) / + sizeof(struct cmd_handler)) { + rdma_error_report("Unsupported command"); +Index: qemu-6.2.0/hw/rdma/vmw/pvrdma_main.c +=================================================================== +--- qemu-6.2.0.orig/hw/rdma/vmw/pvrdma_main.c ++++ qemu-6.2.0/hw/rdma/vmw/pvrdma_main.c +@@ -249,7 +249,8 @@ static void init_dsr_dev_caps(PVRDMADev + { + struct pvrdma_device_shared_region *dsr; + +- if (dev->dsr_info.dsr == NULL) { ++ if (!dev->dsr_info.dsr) { ++ /* Buggy or malicious guest driver */ + rdma_error_report("Can't initialized DSR"); + return; + } |