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tools/target_dem_fuzzer: Check fmt before dereferencing

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Fixes: NULL pointer dereference
Fixes: 44884/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-4656748688965632

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-02-23 23:58:41 +01:00
parent 68bc9773cf
commit c900f2e42c
1 changed files with 1 additions and 1 deletions
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tools/target_dem_fuzzer.c
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@ -173,7 +173,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
} }
// HLS uses a loop with sleep, we thus must breakout or we timeout // HLS uses a loop with sleep, we thus must breakout or we timeout
if (!strcmp(fmt->name, "hls")) if (fmt && !strcmp(fmt->name, "hls"))
interrupt_counter &= 31; interrupt_counter &= 31;
if (!io_buffer_size || size / io_buffer_size > maxblocks) if (!io_buffer_size || size / io_buffer_size > maxblocks)