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-rw-r--r--meta/recipes-devtools/qemu/qemu/CVE-2021-3582.patch47
1 files changed, 47 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2021-3582.patch b/meta/recipes-devtools/qemu/qemu/CVE-2021-3582.patch
new file mode 100644
index 0000000000..7a88e29384
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2021-3582.patch
@@ -0,0 +1,47 @@
+From 284f191b4abad213aed04cb0458e1600fd18d7c4 Mon Sep 17 00:00:00 2001
+From: Marcel Apfelbaum <marcel@redhat.com>
+Date: Wed, 16 Jun 2021 14:06:00 +0300
+Subject: [PATCH] hw/rdma: Fix possible mremap overflow in the pvrdma device
+ (CVE-2021-3582)
+
+Ensure mremap boundaries not trusting the guest kernel to
+pass the correct buffer length.
+
+Fixes: CVE-2021-3582
+Reported-by: VictorV (Kunlun Lab) <vv474172261@gmail.com>
+Tested-by: VictorV (Kunlun Lab) <vv474172261@gmail.com>
+Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
+Message-Id: <20210616110600.20889-1-marcel.apfelbaum@gmail.com>
+Reviewed-by: Yuval Shaia <yuval.shaia.ml@gmail.com>
+Tested-by: Yuval Shaia <yuval.shaia.ml@gmail.com>
+Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
+Signed-off-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
+
+CVE: CVE-2021-3582
+Upstream-Status: Backport [284f191b4abad213aed04cb0458e1600fd18d7c4]
+Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
+---
+ hw/rdma/vmw/pvrdma_cmd.c | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/hw/rdma/vmw/pvrdma_cmd.c b/hw/rdma/vmw/pvrdma_cmd.c
+index f59879e257..da7ddfa548 100644
+--- a/hw/rdma/vmw/pvrdma_cmd.c
++++ b/hw/rdma/vmw/pvrdma_cmd.c
+@@ -38,6 +38,13 @@ static void *pvrdma_map_to_pdir(PCIDevice *pdev, uint64_t pdir_dma,
+ return NULL;
+ }
+
++ length = ROUND_UP(length, TARGET_PAGE_SIZE);
++ if (nchunks * TARGET_PAGE_SIZE != length) {
++ rdma_error_report("Invalid nchunks/length (%u, %lu)", nchunks,
++ (unsigned long)length);
++ return NULL;
++ }
++
+ dir = rdma_pci_dma_map(pdev, pdir_dma, TARGET_PAGE_SIZE);
+ if (!dir) {
+ rdma_error_report("Failed to map to page directory");
+--
+2.25.1
+