From 3b01518e688d7c7d9d46ac41b11dd2b0c4788775 Mon Sep 17 00:00:00 2001 From: Justin Covell Date: Mon, 28 Dec 2020 20:17:49 -0800 Subject: Set last_comp_version correctly in new dtb and fix potential version issues in fdt_open_into Changes in v3: - Remove noop version sets - Set version correctly on loaded fdt in fdt_open_into Fixes: f1879e1a50eb ("Add limited read-only support for older (V2 and V3) device tree to libfdt.") Signed-off-by: Justin Covell Message-Id: <20201229041749.2187-1-jujugoboom@gmail.com> Signed-off-by: David Gibson --- libfdt/fdt_rw.c | 4 +++- libfdt/fdt_sw.c | 2 +- libfdt/libfdt.h | 1 + 3 files changed, 5 insertions(+), 2 deletions(-) (limited to 'libfdt') diff --git a/libfdt/fdt_rw.c b/libfdt/fdt_rw.c index 68887b9..f13458d 100644 --- a/libfdt/fdt_rw.c +++ b/libfdt/fdt_rw.c @@ -428,12 +428,14 @@ int fdt_open_into(const void *fdt, void *buf, int bufsize) if (can_assume(LATEST) || fdt_version(fdt) >= 17) { struct_size = fdt_size_dt_struct(fdt); - } else { + } else if (fdt_version(fdt) == 16) { struct_size = 0; while (fdt_next_tag(fdt, struct_size, &struct_size) != FDT_END) ; if (struct_size < 0) return struct_size; + } else { + return -FDT_ERR_BADVERSION; } if (can_assume(LIBFDT_ORDER) || diff --git a/libfdt/fdt_sw.c b/libfdt/fdt_sw.c index 68b543c..4c569ee 100644 --- a/libfdt/fdt_sw.c +++ b/libfdt/fdt_sw.c @@ -377,7 +377,7 @@ int fdt_finish(void *fdt) fdt_set_totalsize(fdt, newstroffset + fdt_size_dt_strings(fdt)); /* And fix up fields that were keeping intermediate state. */ - fdt_set_last_comp_version(fdt, FDT_FIRST_SUPPORTED_VERSION); + fdt_set_last_comp_version(fdt, FDT_LAST_COMPATIBLE_VERSION); fdt_set_magic(fdt, FDT_MAGIC); return 0; diff --git a/libfdt/libfdt.h b/libfdt/libfdt.h index 2bc16a8..73467f7 100644 --- a/libfdt/libfdt.h +++ b/libfdt/libfdt.h @@ -14,6 +14,7 @@ extern "C" { #endif #define FDT_FIRST_SUPPORTED_VERSION 0x02 +#define FDT_LAST_COMPATIBLE_VERSION 0x10 #define FDT_LAST_SUPPORTED_VERSION 0x11 /* Error codes: informative error codes */ -- cgit v1.1