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avformat/rmdec: when reading audio blocks, dont leave holes when reading fails 

The fate test is changed because the reference file depends on the use of
non cleared data at the very
end. Alternatively we could upload a new reference file, though that would
then have to be changed every time the handling of a truncated frame changes
or theres a change to error concealment, each time adding a new file ...

Fixes use of uninitialized memory
Fixed: msan_uninit-mem_7f3c02b81363_2787_RLG2_19.rm
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 77d2a1ca59)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-01-09 22:59:51 +01:00
parent 6fb0f37def
commit 050d8d727a
2 changed files with 15 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
libavformat/rmdec.c
View File

@ -785,6 +785,16 @@ rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
}
}
static int readfull(AVFormatContext *s, AVIOContext *pb, uint8_t *dst, int n) {
int ret = avio_read(pb, dst, n);
if (ret != n) {
if (ret >= 0) memset(dst + ret, 0, n - ret);
else memset(dst , 0, n);
av_log(s, AV_LOG_ERROR, "Failed to fully read block\n");
}
return ret;
}
int
ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
AVStream *st, RMStream *ast, int len, AVPacket *pkt,
@ -817,14 +827,14 @@ ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
switch (ast->deint_id) {
case DEINT_ID_INT4:
for (x = 0; x < h/2; x++)
avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
readfull(s, pb, ast->pkt.data+x*2*w+y*cfs, cfs);
break;
case DEINT_ID_GENR:
for (x = 0; x < w/sps; x++)
avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
readfull(s, pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
break;
case DEINT_ID_SIPR:
avio_read(pb, ast->pkt.data + y * w, w);
readfull(s, pb, ast->pkt.data + y * w, w);
break;
}

3
tests/fate/real.mak
View File

@ -31,8 +31,9 @@ fate-sipr-8k5: CMD = pcm -i $(TARGET_SAMPLES)/sipr/sipr_8k5.rm
fate-sipr-8k5: REF = $(SAMPLES)/sipr/sipr_8k5.pcm
FATE_SIPR += fate-sipr-16k
fate-sipr-16k: CMD = pcm -i $(TARGET_SAMPLES)/sipr/sipr_16k.rm
fate-sipr-16k: CMD = pcm -i $(TARGET_SAMPLES)/sipr/sipr_16k.rm -aframes 3250
fate-sipr-16k: REF = $(SAMPLES)/sipr/sipr_16k.pcm
fate-sipr-16k: SIZE_TOLERANCE = 40000
$(FATE_SIPR): CMP = oneoff