Re: [PATCH v3] mm: Fix possible deadlock in console_trylock_spinning

On 8/14/2025 6:56 AM, Andrew Morton wrote:

I'm not sure which kernel version this was against, but kmemleak.c has changed quite a lot.

Could we please see a patch against a latest kernel version? Linus mainline will suit.

Thanks.

I discovered this issue in kernel version 5.10. Afterwards, I reviewed the code of the mainline version and found that this deadlock path no longer exists due to the refactoring of console_lock in v6.2-rc1. For details on the refactoring, you can refer to this link : https://lore.kernel.org/all/20221116162152.193147-1-john.ogness@linutronix.d.... Therefore, theoretically, this issue existed before the refactoring of console_lock.

Best Regards， Guber