[BUG, Crash] Browser crash on trying to view PDF file in "--single-process" mode

[IDA-RE-things]

Bug Description: Browser crashes, if user try to open PDF file in --single-process mode.

Additional info: This different from another known PDF issues. Because in --process-per-site mode it opens successfully. On XP.

To Reproduce:

• use --single-process cmdline switch
• open example PDF: https://mazda.co.id/media/15zgz2ia/mazda-indonesia-pricelist-jakarta-2024_with-color-chart.pdf

Screenshots:

crashdump callstack and related source code:

Config:

• OS: XP 32-bit
• Browser ver: v122-hf: https://github.com/win32ss/supermium/releases/tag/v122-hf
• chrome.dll: latest available (17.03.2024) : https://github.com/win32ss/supermium/releases/download/v122-dbg/122_new_pdb_32.7z

[IDA-RE-things]

UPD: Have seen small fix today in this commit: https://github.com/win32ss/supermium/commit/aeb6ceca21496ce6e22b34759569d1a1285bd996

[win32ss]

Unfortunately I found that there are still some memory allocation issues when viewing some PDFs in --single-process mode. Honestly, upstream has neglected this mode considerably and it will take some time to improve it.