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

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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>
This commit is contained in:
Michael Niedermayer 2014-01-09 22:59:51 +01:00
parent ebfa1264aa
commit 77d2a1ca59
2 changed files with 15 additions and 4 deletions
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16
libavformat/rmdec.c
View File

@ -789,6 +789,16 @@ 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,
@ -821,14 +831,14 @@ 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