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[PULL,for-6.0,v2,08/10] hw/block/nvme: fix ns attachment out-of-bounds read

Message ID 20210407054635.189440-9-its@irrelevant.dk (mailing list archive)
State New, archived
Headers show
Series [PULL,for-6.0,v2,01/10] hw/block/nvme: fix pi constraint check | expand

Commit Message

Klaus Jensen April 7, 2021, 5:46 a.m. UTC
From: Klaus Jensen <k.jensen@samsung.com>

nvme_ns_attachment() does not verify the contents of the host-supplied
16 bit "Number of Identifiers" field in the command payload.

Make sure the value is capped at 2047 and fix the out-of-bounds read.

Fixes: 645ce1a70cb6 ("hw/block/nvme: support namespace attachment command")
Cc: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
 hw/block/nvme.c | 1 +
 1 file changed, 1 insertion(+)
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diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index d2dd82496790..87891d4d0f3b 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -4920,6 +4920,7 @@  static uint16_t nvme_ns_attachment(NvmeCtrl *n, NvmeRequest *req)
+    *nr_ids = MIN(*nr_ids, NVME_CONTROLLER_LIST_SIZE - 1);
     for (i = 0; i < *nr_ids; i++) {
         ctrl = nvme_subsys_ctrl(n->subsys, ids[i]);
         if (!ctrl) {