net: ncsi: Fix buffer overflow in fetching version id

[ Upstream commit 8e16170ae972c7fed132bc928914a2ffb94690fc ]

In NC-SI spec v1.2 section 8.4.44.2, the firmware name doesn't
need to be null terminated while its size occupies the full size
of the field. Fix the buffer overflow issue by adding one
additional byte for null terminator.

Signed-off-by: Hari Kalavakunta <kalavakunta.hari.prasad@gmail.com>
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Link: https://patch.msgid.link/20250610193338.1368-1-kalavakunta.hari.prasad@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/ncsi/internal.h b/net/ncsi/internal.h
index 2c260f33b55cc56cc81170c9c7288ffcc236c3e7..ad1f671ffc37facb345f1c7340685e3258e1f52c 100644 (file)
--- a/net/ncsi/internal.h
+++ b/net/ncsi/internal.h
@@ -110,7 +110,7 @@ struct ncsi_channel_version {
        u8   update;            /* NCSI version update */
        char alpha1;            /* NCSI version alpha1 */
        char alpha2;            /* NCSI version alpha2 */
-       u8  fw_name[12];        /* Firmware name string                */
+       u8  fw_name[12 + 1];    /* Firmware name string                */
        u32 fw_version;         /* Firmware version                   */
        u16 pci_ids[4];         /* PCI identification                 */
        u32 mf_id;              /* Manufacture ID                     */

diff --git a/net/ncsi/ncsi-rsp.c b/net/ncsi/ncsi-rsp.c
index 8668888c5a2f996a3dbcd390563b7719ab0693c7..d5ed80731e89281104c6dea121aacb92bf7a6b44 100644 (file)
--- a/net/ncsi/ncsi-rsp.c
+++ b/net/ncsi/ncsi-rsp.c
@@ -775,6 +775,7 @@ static int ncsi_rsp_handler_gvi(struct ncsi_request *nr)
        ncv->alpha1 = rsp->alpha1;
        ncv->alpha2 = rsp->alpha2;
        memcpy(ncv->fw_name, rsp->fw_name, 12);
+       ncv->fw_name[12] = '\0';
        ncv->fw_version = ntohl(rsp->fw_version);
        for (i = 0; i < ARRAY_SIZE(ncv->pci_ids); i++)
                ncv->pci_ids[i] = ntohs(rsp->pci_ids[i]);