util/nvmutil: add negative off check to prw

Signed-off-by: Leah Rowe <leah@libreboot.org>
2026-07-11 05:52:36 +02:00 · 2026-03-13 23:22:21 +00:00
parent fb57cedded
commit e71f977468
1 changed files with 1 additions and 0 deletions
@@ -1684,6 +1684,7 @@ prw(int fd, void *mem, size_t nrw,
 		goto err_prw;

 	if (fd < 0
+	    || off < 0
 	    || !nrw /* prevent zero read request */
 	    || nrw > (size_t)SSIZE_MAX /* prevent overflow */
 	    || (unsigned int)rw_type > IO_PWRITE)