[FFmpeg-devel] [PATCH] avformat/hlsenc: fix segfault when using -hls_segment_type fmp4 with -hls_segment_filename

[Steven Liu]

2017-09-16 8:37 GMT+08:00 Steven Liu <lingjiujianke at gmail.com>:
> 2017-09-16 7:16 GMT+08:00 Aman Gupta <ffmpeg at tmm1.net>:
>> From: Aman Gupta <aman at tmm1.net>
>>
>> previously, specifying -hls_segment_filename meant
>> s->base_output_dirname was never set, causing a segfault:
>>
>> (lldb) bt
>> * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
>>   * frame #0: 0x00007fffbf7d82d0 libsystem_platform.dylib`_platform_strcmp + 80
>>     frame #1: 0x00000001005f4dcf libavformat.57.dylib`io_open_default(s=0x000000010481cc00, pb=0x0000000104806020, url=0x0000000000000000, flags=2, options=0x0000000000000000) at options.c:107
>>     frame #2: 0x0000000100528968 libavformat.57.dylib`hls_mux_init(s=0x000000010481cc00) at hlsenc.c:595
>>     frame #3: 0x00000001005273cb libavformat.57.dylib`hls_write_header(s=0x000000010481cc00) at hlsenc.c:1518
>>     frame #4: 0x00000001005c08d0 libavformat.57.dylib`write_header_internal(s=0x000000010481cc00) at mux.c:486
>>     frame #5: 0x00000001005c0774 libavformat.57.dylib`avformat_write_header(s=0x000000010481cc00, options=0x00000001029026e8) at mux.c:539
>> ---
>>  libavformat/hlsenc.c | 45 +++++++++++++++++++++++----------------------
>>  1 file changed, 23 insertions(+), 22 deletions(-)
>>
>> diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c
>> index 895aa41bc3..3a9a235514 100644
>> --- a/libavformat/hlsenc.c
>> +++ b/libavformat/hlsenc.c
>> @@ -1441,32 +1441,33 @@ static int hls_write_header(AVFormatContext *s)
>>          } else {
>>              av_strlcat(hls->basename, pattern, basename_size);
>>          }
>> +    }
>>
>> -        if (av_strcasecmp(hls->fmp4_init_filename, "init.mp4")) {
>> -            int fmp4_init_filename_len = strlen(hls->fmp4_init_filename) + 1;
>> -            hls->base_output_dirname = av_malloc(fmp4_init_filename_len);
>> -            if (!hls->base_output_dirname) {
>> -                ret = AVERROR(ENOMEM);
>> -                goto fail;
>> -            }
>> -            av_strlcpy(hls->base_output_dirname, hls->fmp4_init_filename, fmp4_init_filename_len);
>> -        } else {
>> -            hls->base_output_dirname = av_malloc(basename_size);
>> -            if (!hls->base_output_dirname) {
>> -                ret = AVERROR(ENOMEM);
>> -                goto fail;
>> -            }
>> +    if (av_strcasecmp(hls->fmp4_init_filename, "init.mp4")) {
>> +        int fmp4_init_filename_len = strlen(hls->fmp4_init_filename) + 1;
>> +        hls->base_output_dirname = av_malloc(fmp4_init_filename_len);
>> +        if (!hls->base_output_dirname) {
>> +            ret = AVERROR(ENOMEM);
>> +            goto fail;
>> +        }
>> +        av_strlcpy(hls->base_output_dirname, hls->fmp4_init_filename, fmp4_init_filename_len);
>> +    } else {
>> +        hls->base_output_dirname = av_malloc(basename_size);
>> +        if (!hls->base_output_dirname) {
>> +            ret = AVERROR(ENOMEM);
>> +            goto fail;
>> +        }
>>
>> -            av_strlcpy(hls->base_output_dirname, s->filename, basename_size);
>> -            p = strrchr(hls->base_output_dirname, '/');
>> -            if (p) {
>> -                *(p + 1) = '\0';
>> -                av_strlcat(hls->base_output_dirname, hls->fmp4_init_filename, basename_size);
>> -            } else {
>> -                av_strlcpy(hls->base_output_dirname, hls->fmp4_init_filename, basename_size);
>> -            }
>> +        av_strlcpy(hls->base_output_dirname, s->filename, basename_size);
>> +        p = strrchr(hls->base_output_dirname, '/');
>> +        if (p) {
>> +            *(p + 1) = '\0';
>> +            av_strlcat(hls->base_output_dirname, hls->fmp4_init_filename, basename_size);
>> +        } else {
>> +            av_strlcpy(hls->base_output_dirname, hls->fmp4_init_filename, basename_size);
>>          }
>>      }
>> +
>>      if (!hls->use_localtime) {
>>          ret = sls_flag_check_duration_size_index(hls);
>>          if (ret < 0) {
>> --
>> 2.13.5 (Apple Git-94)
>>
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>
>
> LGTM


Applied


Thanks