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avformat/rpl: The associative law doesnt hold for signed integers in C

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Add () to avoid undefined behavior
Fixes: signed integer overflow: 9223372036854775790 + 57 cannot be represented in type 'long'
Fixes: 34983/clusterfuzz-testcase-minimized-ffmpeg_dem_RPL_fuzzer-5765822923538432

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 480f11bdd7)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2021-06-10 20:35:43 +02:00
parent 386190d873
commit 81a32fe24e
1 changed files with 1 additions and 1 deletions
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libavformat/rpl.c
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@@ -103,7 +103,7 @@ static AVRational read_fps(const char* line, int* error)
// Truncate any numerator too large to fit into an int64_t // Truncate any numerator too large to fit into an int64_t
if (num > (INT64_MAX - 9) / 10 || den > INT64_MAX / 10) if (num > (INT64_MAX - 9) / 10 || den > INT64_MAX / 10)
break; break;
num = 10 * num + *line - '0'; num = 10 * num + (*line - '0');
den *= 10; den *= 10;
} }
if (!num) if (!num)