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-rw-r--r--source3/lib/util.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/source3/lib/util.c b/source3/lib/util.c
index 5007fb72ef..074b523ae0 100644
--- a/source3/lib/util.c
+++ b/source3/lib/util.c
@@ -2879,6 +2879,25 @@ int this_is_smp(void)
}
/****************************************************************
+ Check if offset/length fit into bufsize. Should probably be
+ merged with is_offset_safe, but this would require a rewrite
+ of lanman.c. Later :-)
+****************************************************************/
+
+bool trans_oob(uint32_t bufsize, uint32_t offset, uint32_t length)
+{
+ if ((offset + length < offset) || (offset + length < length)) {
+ /* wrap */
+ return true;
+ }
+ if ((offset > bufsize) || (offset + length > bufsize)) {
+ /* overflow */
+ return true;
+ }
+ return false;
+}
+
+/****************************************************************
Check if an offset into a buffer is safe.
If this returns True it's safe to indirect into the byte at
pointer ptr+off.