diff options
| author |  Mike Reed <reed@google.com> | 2018-05-02 14:58:36 -0400 |
|---|---|---|
| committer |  Skia Commit-Bot <skia-commit-bot@chromium.org> | 2018-05-02 19:43:08 +0000 |
| commit | 8345556983997960b2bbb68617619b1f65b50601 (patch) | |
| tree | 9c8fd5b1aa065544d55456740bcd800b63ef7d9e /src/core/SkRegion.cpp | |
| parent | f4f06ada607a9864111e5c1b7e22a1af6a6cda5d (diff) | |
check for bad xIntervals before multiply
Bug: oss-fuzz:6120
Change-Id: Icbd464352ad8ef1d35d274da049bc3424ccfa4d4
Reviewed-on: https://skia-review.googlesource.com/125420
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
Diffstat (limited to 'src/core/SkRegion.cpp')
| -rw-r--r-- | src/core/SkRegion.cpp | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/src/core/SkRegion.cpp b/src/core/SkRegion.cpp index 080b148e47..a7e04fc8c4 100644 --- a/src/core/SkRegion.cpp +++ b/src/core/SkRegion.cpp @@ -1234,13 +1234,10 @@ static bool validate_run(const int32_t* runs, int32_t xIntervals = *runs++; SkASSERT(runs < end); - if (xIntervals < 0 || runs + 1 + 2 * xIntervals > end) { + if (xIntervals < 0 || xIntervals > intervalCount || runs + 1 + 2 * xIntervals > end) { return false; } intervalCount -= xIntervals; - if (intervalCount < 0) { - return false; // too many intervals - } bool firstInterval = true; int32_t lastRight = 0; // check that x-intervals are distinct and ordered. while (xIntervals-- > 0) { |