From da399e213523867dea1229e8f0fd955fed0410e7 Mon Sep 17 00:00:00 2001 From: Gautam Ramakrishnan Date: Mon, 10 Feb 2020 00:03:09 +0530 Subject: [PATCH] libswscale/utils.c: Fix bug #8255 Bug #8255 points out a double free error in libwscale/utils.c file. The double free is because the pointer to cascaded_context of an sw_context is not set to NULL after freeing it. When the sw_context is later freed, sws_freeContext is called on the cascaded_context, causing a double free. Signed-off-by: Michael Niedermayer --- libswscale/utils.c | 1 + 1 file changed, 1 insertion(+) diff --git a/libswscale/utils.c b/libswscale/utils.c index b2c08a5983..e9c66aeb4f 100644 --- a/libswscale/utils.c +++ b/libswscale/utils.c @@ -1502,6 +1502,7 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter, ff_free_filters(c2); if (ff_init_filters(c2) < 0) { sws_freeContext(c2); + c->cascaded_context[1] = NULL; return -1; }