tree 257946c41bd71e800be665f850d61a021066d6b2
parent edd4fedc5427cf1cf1f4b045e53ff91eb282e9d4
author Ben Wagner <bungeman@chromium.org> 1642284498 -0500
committer Ben Wagner <bungeman@chromium.org> 1642285299 -0500

[pshinter] Avoid accessing uninitialized zone.

The `normal_top.count` may be 0, implying no `normal_top.zones` exist.
The code must not access these (non-existent) `normal_top.zones`.

* src/pshinter/pshalgo.c (ps_hints_apply): Do not assume that
`normal_top.zones[0]` is initialized. Test `normal_top.count`
before using `normal_top.zones[0]`. Do not rescale if there are no
`zones`.

Fixes: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=43675