Bug #79756 [Fbk->Opn]: finfo_file crash (FILEINFO_MIME)

Edit report at https://bugs.php.net/bug.php?id=79756&edit=1 ID: 79756 User updated by: joris at tactics dot be Reported by: joris at tactics dot be Summary: finfo_file crash (FILEINFO_MIME) -Status: Feedback +Status: Open Type: Bug Package: Filesystem function related Operating System: Windows PHP Version: 7.3.19 Block user comment: N Private report: N New Comment: file can be downloaded here: https://we.tl/t-AfVEKeeUs1 Previous Comments: ------------------------------------------------------------------------ [2020-06-29 09:26:36] nikic@php.net In this case, more useful than a backtrace would be the Excel file that triggers it. Is is possible to share it? ------------------------------------------------------------------------ [2020-06-29 09:20:50] laruence@php.net Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php for *NIX and http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32 Once you have generated a backtrace, please submit it to this bug report and change the status back to "Open". Thank you for helping us make PHP better. ------------------------------------------------------------------------ [2020-06-29 09:17:58] joris at tactics dot be Description: ------------ When trying to detect the mime type of a specific file, the php-cgi.exe process crashes. It only happens with one specific .xls file I have. This .xls file does open in Excel without issues. Test script: --------------- // $filename is path to a specific file that causes the crash. // I can't seem to upload this file here anywhere :( $finfo = finfo_open(FILEINFO_MIME); $mime = finfo_file($finfo, $filename); // CRASH finfo_close($finfo); echo $mime; Expected result: ---------------- application/vnd.ms-excel; charset=binary ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79756&edit=1