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rtmpproto: Check the buffer sizes when copying app/playpath strings

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As pointed out by Reimar Döffinger.

CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö
2014-05-08 15:12:23 +03:00
parent 7ce3bd9614
commit 0bacfa8d37
1 changed files with 5 additions and 4 deletions
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9
libavformat/rtmpproto.c
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@@ -2484,12 +2484,13 @@ reconnect:
if (qmark && strstr(qmark, "slist=")) { if (qmark && strstr(qmark, "slist=")) {
char* amp; char* amp;
// After slist we have the playpath, before the params, the app // After slist we have the playpath, before the params, the app
av_strlcpy(rt->app, path + 1, qmark - path); av_strlcpy(rt->app, path + 1, FFMIN(qmark - path, APP_MAX_LENGTH));
fname = strstr(path, "slist=") + 6; fname = strstr(path, "slist=") + 6;
// Strip any further query parameters from fname // Strip any further query parameters from fname
amp = strchr(fname, '&'); amp = strchr(fname, '&');
if (amp) { if (amp) {
av_strlcpy(fname_buffer, fname, amp - fname + 1); av_strlcpy(fname_buffer, fname, FFMIN(amp - fname + 1,
sizeof(fname_buffer)));
fname = fname_buffer; fname = fname_buffer;
} }
} else if (!strncmp(path, "/ondemand/", 10)) { } else if (!strncmp(path, "/ondemand/", 10)) {
@@ -2507,10 +2508,10 @@ reconnect:
fname = strchr(p + 1, '/'); fname = strchr(p + 1, '/');
if (!fname || (c && c < fname)) { if (!fname || (c && c < fname)) {
fname = p + 1; fname = p + 1;
av_strlcpy(rt->app, path + 1, p - path); av_strlcpy(rt->app, path + 1, FFMIN(p - path, APP_MAX_LENGTH));
} else { } else {
fname++; fname++;
av_strlcpy(rt->app, path + 1, fname - path - 1); av_strlcpy(rt->app, path + 1, FFMIN(fname - path - 1, APP_MAX_LENGTH));
} }
} }
} }