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-rw-r--r--libavformat/ffmdec.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/libavformat/ffmdec.c b/libavformat/ffmdec.c
index 6f96c719ab..e8e1891b4a 100644
--- a/libavformat/ffmdec.c
+++ b/libavformat/ffmdec.c
@@ -30,7 +30,8 @@ int64_t ffm_read_write_index(int fd)
uint8_t buf[8];
lseek(fd, 8, SEEK_SET);
- read(fd, buf, 8);
+ if (read(fd, buf, 8) != 8)
+ return AVERROR(EIO);
return AV_RB64(buf);
}