[Privoxy-commits] [privoxy] 04/06: gif_deanimate(): Confirm that that we have enough data

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commit 88d5b57a4a639f88c937e7b22f6fe976b4380ce9
Author: Fabian Keil <fk at fabiankeil.de>
AuthorDate: Tue Feb 9 11:19:08 2021 +0100

    gif_deanimate(): Confirm that that we have enough data
    
    ... before doing any work.
    
    Fixes a crash when fuzzing with an empty document.
    
    Reported by: Joshua Rogers (Opera).
---
 deanimate.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/deanimate.c b/deanimate.c
index bc64de63..a6759da4 100644
--- a/deanimate.c
+++ b/deanimate.c
@@ -333,6 +333,10 @@ int gif_deanimate(struct binbuffer *src, struct binbuffer *dst, int get_first_im
    {
       return 1;
    }
+   if (src->size <= 10)
+   {
+      return 1;
+   }
 
    c = buf_getbyte(src, 10);
 

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