On Thu, 8 Feb 2024 12:25:35 +0000, Greg KH wrote:

On Thu, Feb 08, 2024 at 07:37:56PM +0800, Edward Adam Davis wrote:

quoted

On Thu, 8 Feb 2024 10:56:00, Greg KH wrote:

quoted

quoted

The input_add_uevent_modalias_var()->input_print_modalias() will add 1684 bytes
of data to env, which will result in insufficient memory allocated to the buf
members of env.

What is "env"?  And can you wrap your lines at 72 columns please?

env is an instance of struct kobj_uevent_env.

Also, why is "risc64" in the subject line?

Because when syzbot reported this issue, it wrote "userspace arch: riscv64".
However, I actually tested it on the master branch of upstream.

thanks,
edward.