tools: open FIT image read-only
Open for reading as O_RDONLY instead of O_RDWR:
the only usage of the fd is for the single read() below;
this prevented
mkimage -f auto -A arm64 \
-T kernel -C lz4 -d Image-6.6.15.lz4 \
-b mt8173-elm-hana-6.6.15.dtb outf
when the inputs were unwritable.
Link: https://bugs.debian.org/1063097
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Reviewed-by: Dragan Simic <dsimic@manjaro.org>
diff --git a/tools/fit_image.c b/tools/fit_image.c
index beef1fa..0fccfbb 100644
--- a/tools/fit_image.c
+++ b/tools/fit_image.c
@@ -137,7 +137,7 @@
int ret;
int fd;
- fd = open(fname, O_RDWR | O_BINARY);
+ fd = open(fname, O_RDONLY | O_BINARY);
if (fd < 0) {
fprintf(stderr, "%s: Can't open %s: %s\n",
params->cmdname, fname, strerror(errno));