ffmpeg/ffmpeg_AV_CODEC_ID_DXV_fuzzer: Crash in dxt1_block_internal

2019-04-28T19:11:13
ID OSSFUZZ-14493
Type ossfuzz
Reporter Google
Modified 2019-07-27T15:26:24

Description

Project: https://git.ffmpeg.org/ffmpeg.git

Detailed report: https://oss-fuzz.com/testcase?key=5071018000908288

Project: ffmpeg Fuzzer: libFuzzer_ffmpeg_AV_CODEC_ID_DXV_fuzzer Fuzz target binary: ffmpeg_AV_CODEC_ID_DXV_fuzzer Job Type: libfuzzer_ubsan_ffmpeg Platform Id: linux

Crash Type: UNKNOWN WRITE Crash Address: 0x7fd4d070d000 Crash State: dxt1_block_internal dxt1_block decompress_texture_thread

Sanitizer: undefined (UBSAN)

Recommended Security Severity: High

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_ubsan_ffmpeg&range=201805080637:201805310055

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5071018000908288

Issue filed automatically.

See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for instructions to reproduce this bug locally.

This bug is subject to a 90 day disclosure deadline. If 90 days elapse without an upstream patch, then the bug report will automatically become visible to the public.

When you fix this bug, please * mention the fix revision(s). * state whether the bug was a short-lived regression or an old bug in any stable releases. * add any other useful information. This information can help downstream consumers.

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