[File] "lhs/off overflow" messages to stderr

[Christos Zoulas]

Fixed, thanks!

christos

> On Dec 22, 2022, at 3:04 AM, Alexandre IOOSS <erdnaxe at crans.org> wrote:
> 
> Signed PGP part
> Hello,
> 
> I also encountered these errors messages when running file on my documents.
> 
> I made a 6-bytes file that triggers the message:
> ```
> $ hexdump -C test.bin
> 00000000  00 00 00 43 ff ff                                 |...C..|
> 00000006
> $ file test.bin
> lhs/off overflow 4294918912 0
> test.bin: data
> ```
> 
> Running `file -d test.bin 2>&1` shows:
> ```
> [...]
> 42: > 2(lelong,&0), string,=*IDENTIFICATION,"Becker & Hickl PMS Data File"]
> lhs/off overflow 4294918912 0
> bb=[0x7fd200cb1010,6,0], 0 [b=0x7fd200cb1010,6,0], [o=0, c=0]
> [...]
> ```
> 
> So it seems that "Becker & Hickl PMS Data File" signature is causing at least partially this issue.
> 
> Best wishes,
> 
> --
> Alexandre
> 
> 
> On 12/20/22 23:34, Christoph Biedl wrote:
>> Okay, that one was garbled, too.
>> So in a nutshell,
>> commit ba8be65cb978669c2081265ae61f7606805eeb3e
>> Author: Christos Zoulas <christos at zoulas.com>
>> Date:   Wed Sep 21 02:18:17 2022 +0000
>>     check and limit range of offset to prevent overflow (clusterfuzz)
>> introduced error messages in src/softmagic.c, printed to stderr. At
>> least the first one
>> | fprintf(stderr, "lhs/off overflow %jd %jd\n", lhs, off);
>> gets triggered here on a regular base (lost a reproducer, can try to find it
>> again).
>> May I suggest to disable them, or to print them only when running under
>> some debugging?
>>     Christoph
> 

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