From ba92c416afdcc1f293c79ce1f57c3ff93dbe1e37 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 4 Feb 2022 00:44:32 +0100 Subject: [PATCH] avformat/utils: Fix invalid NULL pointer operation in ff_parse_key_value() Fixes: pointer index expression with base 0x000000000000 overflowed to 0xffffffffffffffff Fixes: 44012/clusterfuzz-testcase-minimized-ffmpeg_dem_HLS_fuzzer-5670607746891776 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 59328aabd2c789ae053e18a62a20a7addfd4d069) Signed-off-by: Michael Niedermayer --- libavformat/utils.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/utils.c b/libavformat/utils.c index 940703e87d..cee86ae87b 100644 --- a/libavformat/utils.c +++ b/libavformat/utils.c @@ -1244,7 +1244,7 @@ void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf, key_len = ptr - key; callback_get_buf(context, key, key_len, &dest, &dest_len); - dest_end = dest + dest_len - 1; + dest_end = dest ? dest + dest_len - 1 : NULL; if (*ptr == '\"') { ptr++;