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avdevice/xcbgrab: Check sscanf() return 

Alot more input checking can be performed, this is only checking the obvious missing case

Fixes: CID1598562 Unchecked return value

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-06-02 23:32:43 +02:00
parent f6d0a41c8c
commit 78d6d13bab
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GPG Key ID: B18E8928B3948D64
1 changed files with 4 additions and 1 deletions
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libavdevice/xcbgrab.c
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@ -828,7 +828,10 @@ static av_cold int xcbgrab_read_header(AVFormatContext *s)
if (!sscanf(s->url, "%[^+]+%d,%d", display_name, &c->x, &c->y)) {
*display_name = 0;
sscanf(s->url, "+%d,%d", &c->x, &c->y);
if(sscanf(s->url, "+%d,%d", &c->x, &c->y) != 2) {
if (*s->url)
av_log(s, AV_LOG_WARNING, "Ambigous URL: %s\n", s->url);
}
}
c->conn = xcb_connect(display_name[0] ? display_name : NULL, &screen_num);