Subject: [Bug 214913] [xfstests generic/051] BUG: Kernel NULL pointer dereference on read at 0x00000108 NIP [c0000000000372e4] tm_cgpr_active+0x14/0x40

From: [email-masked]
Date: Mon, 12 Dec 2022 05:57:38 +0000

https://bugzilla.kernel.org/show_bug.cgi?id=214913

--- Comment #9 from Michael Ellerman ([email-masked]) ---
I assume it's an io_uring IO worker.

They're created via create_io_worker() -> create_io_thread().

They pass a non-NULL `args->fn` to copy_process() -> copy_thread(), so we end
up in the "kernel thread" branch of the if, which sets p->thread.regs = NULL.

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