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swscale/swscale: Do not crash on floats

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Fixes: shift exponent 32 is too large for 32-bit type 'unsigned int'
Fixes: division by zero
Fixes: 391981061/clusterfuzz-testcase-minimized-ffmpeg_SWS_fuzzer-6691017763389440
Fixes: 392929028/clusterfuzz-testcase-minimized-ffmpeg_SWS_fuzzer-5142088307507200

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 2025-02-04 03:58:43 +01:00
parent ce538ef97a
commit d16a058dbc
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1 changed files with 1 additions and 1 deletions
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libswscale/swscale.c
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@ -623,7 +623,7 @@ av_cold void ff_sws_init_range_convert(SwsInternal *c)
{ {
c->lumConvertRange = NULL; c->lumConvertRange = NULL;
c->chrConvertRange = NULL; c->chrConvertRange = NULL;
if (c->opts.src_range != c->opts.dst_range && !isAnyRGB(c->opts.dst_format)) { if (c->opts.src_range != c->opts.dst_range && !isAnyRGB(c->opts.dst_format) && c->dstBpc < 32) {
init_range_convert_constants(c); init_range_convert_constants(c);
if (c->dstBpc <= 14) { if (c->dstBpc <= 14) {
if (c->opts.src_range) { if (c->opts.src_range) {