Commit 6b69f2ef10cd for kernel

commit 6b69f2ef10cdb018c0b127a7cab88e590bbddba4
Author: Ahmad Byagowi <ahmadexp@gmail.com>
Date:   Tue Aug 4 14:07:51 2026 -0700

    ptp: ocp: Fix board ID over-read

    The EEPROM board ID is a fixed 13-byte field and is not guaranteed to
    contain a NUL terminator. Passing it directly to
    devlink_info_version_fixed_put() treats it as a C string and may read
    beyond the field.

    Format at most OCP_BOARD_ID_LEN bytes into the existing local buffer
    before reporting the ID. Use a precision limit because the snprintf()
    output size alone does not bound the source string scan.

    Fixes: 0cfcdd1ebcfe ("ptp: ocp: add nvmem interface for accessing eeprom")
    Cc: stable@vger.kernel.org
    Signed-off-by: Ahmad Byagowi <ahmadexp@gmail.com>
    Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
    Link: https://patch.msgid.link/20260804210751.48248-1-ahmadexp@gmail.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c
index 35e911f1ad78..3d26ec1f7b9e 100644
--- a/drivers/ptp/ptp_ocp.c
+++ b/drivers/ptp/ptp_ocp.c
@@ -2177,9 +2177,11 @@ ptp_ocp_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
 	if (err)
 		return err;

+	snprintf(buf, sizeof(buf), "%.*s", OCP_BOARD_ID_LEN,
+		 (const char *)bp->board_id);
 	err = devlink_info_version_fixed_put(req,
 			DEVLINK_INFO_VERSION_GENERIC_BOARD_ID,
-			bp->board_id);
+			buf);
 	if (err)
 		return err;