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SubjectRe: [PATCH -next V2] sysctl: returns -EINVAL when a negative value is passed to proc_doulongvec_minmax
On Mon, Dec 20, 2021 at 05:26:27PM +0800, Baokun Li wrote:
> 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 <hulkci@huawei.com>
> Signed-off-by: Baokun Li <libaokun1@huawei.com>

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

Luis

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