Oss-fuzz issue 390461337 "graphicsmagick:coder_AVIF_fuzzer: Unexpected-exit in error_exit"

[bobfriesenhahn]

Oss-fuzz has found a test case where (when accessed via GraphicsMagick) libheif allows libjpeg to exit due to its default error handler if libheif is compiled with JPEG support (likely a rare configuration). Libjpeg clients normally use setjmp/longjmp for error handling. The error message which comes out (produced by libjpeg) is "Empty input file".

If I use libheif's utilities I see results like:

heif-convert clusterfuzz-testcase-minimized-coder_AVIF_fuzzer-5972439477059584 crap.jpg
File contains 1 image
Input image has undefined bit-depth

and

heif-info clusterfuzz-testcase-minimized-coder_AVIF_fuzzer-5972439477059584
MIME type: unknown
main brand:     
compatible brands:     , mif1,     ,     

image: 32x32 (id=1), primary
Invalid input: Unspecified: Invalid JPEG SOF header

The POC file is attached with a jpg extension to satisfy github:

Please advise if special error handling methodologies are required to deal with this.