在 2021/12/21 3:17, Luis Chamberlain 写道:

On Mon, Dec 20, 2021 at 05:26:27PM +0800, Baokun Li wrote:

quoted

When we pass a negative value to the proc_doulongvec_minmax() function,
the function returns 0, but the corresponding interface value does not
change.

we can easily reproduce this problem with the following commands:
     `cd /proc/sys/fs/epoll`
     `echo -1 > max_user_watches; echo $?; cat max_user_watches`

This function requires a non-negative number to be passed in, so when
a negative number is passed in, -EINVAL is returned.

Reported-by: Hulk Robot <redacted>
Signed-off-by: Baokun Li <redacted>

Acked-by: Luis Chamberlain <mcgrof@kernel.org>

  Luis
.

Thank you for your Ack.

-- 
With Best Regards,
Baokun Li