"possible deadlock in __shm_close" 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: __shm_close+0x49/0x740 ipc/shm.c:374

Bug report: https://pastebin.com/hrWjn0VE

Entire Log: https://pastebin.com/FJGQb33J

Thank you for your time and attention.

Best regards

Wall