"UBSAN: division-overflow in bdi_set_min_bytes" in Linux Kernel v6.12-rc4

[cheung wall]

Hello,

I am writing to report a potential vulnerability identified in the
Linux Kernel version v6.12-rc4. This vulnerability was discovered
while i was testing the kernel.

Linux Kernel Repository Git Commit:
42f7652d3eb527d03665b09edac47f85fb600924 (tag: v6.12-rc4)

Bug Location: UBSAN: division-overflow in ./include/linux/math64.h:69:18

Bug report: https://pastebin.com/6SZqV2S7

Entire Log: https://pastebin.com/JhDZn4DZ

Thank you for your time and attention.

Best regards

Wall