diff options
Diffstat (limited to 'source3/lib/util.c')
| -rw-r--r-- | source3/lib/util.c | 19 |
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. |