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new b21f1b6482 tests/swscale: don't pass fake object to av_opt_eval_*
b21f1b6482 is described below
commit b21f1b6482b412edc06b20b2f5807c039081ee3a
Author: Niklas Haas <[email protected]>
AuthorDate: Mon Feb 23 19:37:00 2026 +0100
Commit: Niklas Haas <[email protected]>
CommitDate: Mon Feb 23 20:55:27 2026 +0000
tests/swscale: don't pass fake object to av_opt_eval_*
This is UB, as the fake object may be used for logging.
Reported-by: Andreas Rheinhardt <[email protected]>
Fixes: ea791a4ef17478693c231f04d8ba60985866f5bc
---
libswscale/tests/swscale.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/libswscale/tests/swscale.c b/libswscale/tests/swscale.c
index 3e05c97bbf..6f6240e4b6 100644
--- a/libswscale/tests/swscale.c
+++ b/libswscale/tests/swscale.c
@@ -509,11 +509,6 @@ int main(int argc, char **argv)
AVLFG rand;
int ret = -1;
- const AVClass *sws_class = sws_get_class();
- const AVOption *flags_opt = av_opt_find(&sws_class, "sws_flags", NULL, 0,
- AV_OPT_SEARCH_FAKE_OBJ);
- av_assert0(flags_opt);
-
for (int i = 1; i < argc; i += 2) {
if (!strcmp(argv[i], "-help") || !strcmp(argv[i], "--help")) {
fprintf(stderr,
@@ -581,7 +576,10 @@ int main(int argc, char **argv)
opts.w = 1920;
opts.h = 1080;
} else if (!strcmp(argv[i], "-flags")) {
- ret = av_opt_eval_flags(&sws_class, flags_opt, argv[i + 1],
&opts.flags);
+ SwsContext *dummy = sws_alloc_context();
+ const AVOption *flags_opt = av_opt_find(dummy, "sws_flags", NULL,
0, 0);
+ ret = av_opt_eval_flags(dummy, flags_opt, argv[i + 1],
&opts.flags);
+ sws_free_context(&dummy);
if (ret < 0) {
fprintf(stderr, "invalid flags %s\n", argv[i + 1]);
goto error;
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