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| author | Michael Niedermayer <michaelni@gmx.at> | 2014-08-22 01:15:57 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-08-30 21:33:09 +0200 |
| commit | c58d7f9eb56abc4c90d98011c23a4a031077af4e (patch) | |
| tree | 51038ddfd8d519b942062d9bbb7460ce8f3c527f | |
| parent | 11a61dd0e2b51bdb610a80e322667c3284f6d761 (diff) | |
| download | ffmpeg-c58d7f9eb56abc4c90d98011c23a4a031077af4e.tar.gz | |
avcodec: fix aac/ac3 parser bitstream buffer size
Buffers containing copies of the AAC and AC3 header bits were not padded
before parsing, violating init_get_bits() buffer padding requirement,
leading to potential buffer read overflows.
This change adds FF_INPUT_BUFFER_PADDING_SIZE bytes to the bit buffer
for parsing the header in each of aac_parser.c and ac3_parser.c.
Based on patch by: Matt Wolenetz <wolenetz@chromium.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit fccd85b9f30525f88692f53134eba41f1f2d90db)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavcodec/aac_parser.c | 2 | ||||
| -rw-r--r-- | libavcodec/ac3_parser.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/aac_parser.c b/libavcodec/aac_parser.c index ab6ca4e268..cb93ba9482 100644 --- a/libavcodec/aac_parser.c +++ b/libavcodec/aac_parser.c @@ -34,7 +34,7 @@ static int aac_sync(uint64_t state, AACAC3ParseContext *hdr_info, int size; union { uint64_t u64; - uint8_t u8[8]; + uint8_t u8[8 + FF_INPUT_BUFFER_PADDING_SIZE]; } tmp; tmp.u64 = av_be2ne64(state); diff --git a/libavcodec/ac3_parser.c b/libavcodec/ac3_parser.c index 8dc4c0d480..acfbc2ea66 100644 --- a/libavcodec/ac3_parser.c +++ b/libavcodec/ac3_parser.c @@ -147,7 +147,7 @@ static int ac3_sync(uint64_t state, AACAC3ParseContext *hdr_info, int err; union { uint64_t u64; - uint8_t u8[8]; + uint8_t u8[8 + FF_INPUT_BUFFER_PADDING_SIZE]; } tmp = { av_be2ne64(state) }; AC3HeaderInfo hdr; GetBitContext gbc; |