linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: ebiederm@xmission.com (Eric W. Biederman)
To: Sven Schnelle <svens@linux.ibm.com>
Cc: Alexey Gladkov <legion@kernel.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] ucounts: add missing data type changes
Date: Fri, 30 Jul 2021 12:52:37 -0500	[thread overview]
Message-ID: <87sfzvbsey.fsf@disp2133> (raw)
In-Reply-To: <20210730062854.3601635-1-svens@linux.ibm.com> (Sven Schnelle's message of "Fri, 30 Jul 2021 08:28:54 +0200")

Sven Schnelle <svens@linux.ibm.com> writes:

> commit f9c82a4ea89c3 ("Increase size of ucounts to atomic_long_t")
> changed the data type of ucounts/ucounts_max to long, but missed to
> adjust a few other places. This is noticeable on big endian platforms
> from user space because the /proc/sys/user/max_*_names files all
> contain 0.

Applied.  Thank you.
>
> Fixes: f9c82a4ea89c ("Increase size of ucounts to atomic_long_t")
> Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
> ---
>  fs/notify/fanotify/fanotify_user.c | 10 ++++++----
>  fs/notify/inotify/inotify_user.c   | 10 ++++++----
>  kernel/ucount.c                    | 16 ++++++++--------
>  3 files changed, 20 insertions(+), 16 deletions(-)
>
> diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
> index 64864fb40b40..6576657a1a25 100644
> --- a/fs/notify/fanotify/fanotify_user.c
> +++ b/fs/notify/fanotify/fanotify_user.c
> @@ -58,18 +58,20 @@ struct ctl_table fanotify_table[] = {
>  	{
>  		.procname	= "max_user_groups",
>  		.data	= &init_user_ns.ucount_max[UCOUNT_FANOTIFY_GROUPS],
> -		.maxlen		= sizeof(int),
> +		.maxlen		= sizeof(long),
>  		.mode		= 0644,
> -		.proc_handler	= proc_dointvec_minmax,
> +		.proc_handler	= proc_doulongvec_minmax,
>  		.extra1		= SYSCTL_ZERO,
> +		.extra2		= SYSCTL_INT_MAX,
>  	},
>  	{
>  		.procname	= "max_user_marks",
>  		.data	= &init_user_ns.ucount_max[UCOUNT_FANOTIFY_MARKS],
> -		.maxlen		= sizeof(int),
> +		.maxlen		= sizeof(long),
>  		.mode		= 0644,
> -		.proc_handler	= proc_dointvec_minmax,
> +		.proc_handler	= proc_doulongvec_minmax,
>  		.extra1		= SYSCTL_ZERO,
> +		.extra2		= SYSCTL_INT_MAX,
>  	},
>  	{
>  		.procname	= "max_queued_events",
> diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
> index 98f61b31745a..55fe7cdea2fb 100644
> --- a/fs/notify/inotify/inotify_user.c
> +++ b/fs/notify/inotify/inotify_user.c
> @@ -59,18 +59,20 @@ struct ctl_table inotify_table[] = {
>  	{
>  		.procname	= "max_user_instances",
>  		.data		= &init_user_ns.ucount_max[UCOUNT_INOTIFY_INSTANCES],
> -		.maxlen		= sizeof(int),
> +		.maxlen		= sizeof(long),
>  		.mode		= 0644,
> -		.proc_handler	= proc_dointvec_minmax,
> +		.proc_handler	= proc_doulongvec_minmax,
>  		.extra1		= SYSCTL_ZERO,
> +		.extra2		= SYSCTL_INT_MAX,
>  	},
>  	{
>  		.procname	= "max_user_watches",
>  		.data		= &init_user_ns.ucount_max[UCOUNT_INOTIFY_WATCHES],
> -		.maxlen		= sizeof(int),
> +		.maxlen		= sizeof(long),
>  		.mode		= 0644,
> -		.proc_handler	= proc_dointvec_minmax,
> +		.proc_handler	= proc_doulongvec_minmax,
>  		.extra1		= SYSCTL_ZERO,
> +		.extra2		= SYSCTL_INT_MAX,
>  	},
>  	{
>  		.procname	= "max_queued_events",
> diff --git a/kernel/ucount.c b/kernel/ucount.c
> index 87799e2379bd..f852591e395c 100644
> --- a/kernel/ucount.c
> +++ b/kernel/ucount.c
> @@ -58,14 +58,14 @@ static struct ctl_table_root set_root = {
>  	.permissions = set_permissions,
>  };
>  
> -#define UCOUNT_ENTRY(name)				\
> -	{						\
> -		.procname	= name,			\
> -		.maxlen		= sizeof(int),		\
> -		.mode		= 0644,			\
> -		.proc_handler	= proc_dointvec_minmax,	\
> -		.extra1		= SYSCTL_ZERO,		\
> -		.extra2		= SYSCTL_INT_MAX,	\
> +#define UCOUNT_ENTRY(name)					\
> +	{							\
> +		.procname	= name,				\
> +		.maxlen		= sizeof(long),			\
> +		.mode		= 0644,				\
> +		.proc_handler	= proc_doulongvec_minmax,	\
> +		.extra1		= SYSCTL_ZERO,			\
> +		.extra2		= SYSCTL_INT_MAX,		\
>  	}
>  static struct ctl_table user_table[] = {
>  	UCOUNT_ENTRY("max_user_namespaces"),

  reply	other threads:[~2021-07-30 17:52 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-30  6:28 [PATCH v3] ucounts: add missing data type changes Sven Schnelle
2021-07-30 17:52 ` Eric W. Biederman [this message]
2021-08-04  2:40 ` Nathan Chancellor
2021-08-04 19:47   ` Eric W. Biederman
2021-08-04 20:27     ` Nathan Chancellor
2021-08-05 16:48       ` Eric W. Biederman
2021-08-05 19:26         ` Nathan Chancellor
2021-08-06 10:36           ` Naresh Kamboju
2021-08-09 20:43             ` [PATCH v4] " Eric W. Biederman
2021-08-10  9:01               ` Jan Kara

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=87sfzvbsey.fsf@disp2133 \
    --to=ebiederm@xmission.com \
    --cc=legion@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=svens@linux.ibm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).