jpg image hitting an endless loop in jpegReader::nextMarker

Question

jpg image hitting an endless loop in jpegReader::nextMarker

smurfless1 opened this issue a year ago · comments

I have an image from a Nikon scanner that's somehow hitting an endless loop in the nextMarker method. jr.err = nil, and jr.pos = 0, it's passing the isMarkerFirstByte check, failing the isSOIMarker check, and then as jr.pos is still 0, the loop continues indefinitely.

The nature of this loop means I can't recover from this situation without changing the code in some possibly unhelpful way, like naively setting a max loop count or something like that. Someone want to take a whack at figuring out the correct way to limit this loop?

smurfless1 · Answer 1 · Tue Apr 04 2023 02:02:50 GMT+0800 (China Standard Time)

smurfless1 commented a year ago

smurfless1 · Answer 2 · Tue Apr 04 2023 02:03:37 GMT+0800 (China Standard Time)

ok, that attach didn't do QUITE what I wanted, but I can provide the file or some of the header on request.

evanoberholster · Answer 3 · Wed Apr 05 2023 22:29:19 GMT+0800 (China Standard Time)

Kindly send the file and I will take a look. Thanks.

evanoberholster · Answer 4 · Thu Apr 06 2023 01:08:51 GMT+0800 (China Standard Time)

@smurfless1 please check your file with the bug fix. Please open the issue if unresolved.

smurfless1 · Answer 5 · Thu Apr 06 2023 01:11:15 GMT+0800 (China Standard Time)

Will do. I have about a hundred of these that trigger that so I should be able to check it pretty across more than one. Dave Brown

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