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Diffstat (limited to 'count-delta.c')
| -rw-r--r-- | count-delta.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/count-delta.c b/count-delta.c index 3bcc205..e10c832 100644 --- a/count-delta.c +++ b/count-delta.c @@ -88,5 +88,8 @@ unsigned long count_delta(void *delta_buf, unsigned long delta_size) /* delete size is what was _not_ copied from source. * edit size is that and literal additions. */ + if (src_size + added_literal < copied_from_source) + /* we ended up overcounting and underflowed */ + return 0; return (src_size - copied_from_source) + added_literal; } |