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swresample/resample: Limit filter length

Related to CID1197063

The limit choosen is arbitrary and much larger than what makes sense.
It avoids the need for checking arithmetic operations with the length for overflow

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit f9158b01d0f3effb58e87fb07db0382bc1e47de5)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Michael Niedermayer authored on 2014/04/08 07:19:07
Showing 1 changed files

libswresample/resample.c index 8b1b6ca..b968447 100644

libswresample/resample.c

History View file @ 352b096

@@ -229,6 +229,11 @@ static ResampleContext *resample_init(ResampleContext *c, int out_rate, int in_r
                                  av_assert0(0);
+                             }
                     +        if (filter_size/factor > INT32_MAX/256) {
                     +            av_log(NULL, AV_LOG_ERROR, "Filter length too large\n");
                     +            goto error;
                     +        }
+                    +
                              c->phase_shift   = phase_shift;
                              c->phase_mask    = phase_count - 1;
                              c->linear        = linear;