From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Jiri Slaby <jslaby@suse.cz>
Cc: jirislaby@gmail.com, mingo@elte.hu, nhorman@tuxdriver.com,
sfr@canb.auug.org.au, linux-kernel@vger.kernel.org,
akpm@linux-foundation.org, marcin.slusarz@gmail.com,
tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
torvalds@linux-foundation.org, oleg@redhat.com,
James Morris <jmorris@namei.org>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Paul Mackerras <paulus@samba.org>,
linuxppc-dev@ozlabs.org
Subject: Re: [PATCH v3 16/27] PPC: use helpers for rlimits
Date: Sat, 28 Nov 2009 11:19:17 +1100 [thread overview]
Message-ID: <1259367557.2076.11.camel@pasglop> (raw)
In-Reply-To: <1259363167-9347-16-git-send-email-jslaby@suse.cz>
On Sat, 2009-11-28 at 00:05 +0100, Jiri Slaby wrote:
> Make sure compiler won't do weird things with limits. E.g. fetching
> them twice may return 2 different values after writable limits are
> implemented.
>
> I.e. either use newly added rlimit helpers or ACCESS_ONCE if not
> applicable.
Thanks. I have that already queued up.
Cheers,
Ben.
> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
> Cc: James Morris <jmorris@namei.org>
> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Ingo Molnar <mingo@elte.hu>
> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: linuxppc-dev@ozlabs.org
> ---
> arch/powerpc/mm/mmap_64.c | 4 ++--
> arch/powerpc/platforms/cell/spufs/coredump.c | 2 +-
> 2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/powerpc/mm/mmap_64.c b/arch/powerpc/mm/mmap_64.c
> index 0d957a4..8df1299 100644
> --- a/arch/powerpc/mm/mmap_64.c
> +++ b/arch/powerpc/mm/mmap_64.c
> @@ -47,7 +47,7 @@ static inline int mmap_is_legacy(void)
> if (current->personality & ADDR_COMPAT_LAYOUT)
> return 1;
>
> - if (current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY)
> + if (rlim_get_cur(RLIMIT_STACK) == RLIM_INFINITY)
> return 1;
>
> return sysctl_legacy_va_layout;
> @@ -77,7 +77,7 @@ static unsigned long mmap_rnd(void)
>
> static inline unsigned long mmap_base(void)
> {
> - unsigned long gap = current->signal->rlim[RLIMIT_STACK].rlim_cur;
> + unsigned long gap = rlim_get_cur(RLIMIT_STACK);
>
> if (gap < MIN_GAP)
> gap = MIN_GAP;
> diff --git a/arch/powerpc/platforms/cell/spufs/coredump.c b/arch/powerpc/platforms/cell/spufs/coredump.c
> index c4d4a19..4ef1c92 100644
> --- a/arch/powerpc/platforms/cell/spufs/coredump.c
> +++ b/arch/powerpc/platforms/cell/spufs/coredump.c
> @@ -54,7 +54,7 @@ static ssize_t do_coredump_read(int num, struct spu_context *ctx, void *buffer,
> */
> static int spufs_dump_write(struct file *file, const void *addr, int nr, loff_t *foffset)
> {
> - unsigned long limit = current->signal->rlim[RLIMIT_CORE].rlim_cur;
> + unsigned long limit = rlim_get_cur(RLIMIT_CORE);
> ssize_t written;
>
> if (*foffset + nr > limit)
next prev parent reply other threads:[~2009-11-28 0:20 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-27 23:05 [PATCH v3 01/27] SECURITY: selinux, fix update_rlimit_cpu parameter Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 02/27] SECURITY: add task_struct to setrlimit Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 03/27] core: add task_struct to update_rlimit_cpu Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 04/27] sys_setrlimit: make sure ->rlim_max never grows Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 05/27] core: split sys_setrlimit Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 06/27] core: allow setrlimit to non-current tasks Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 07/27] core: optimize setrlimit for current task Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 08/27] FS: proc, switch limits reading to fops Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 09/27] FS: proc, make limits writable Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 10/27] core: do security check under task_lock Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 11/27] core: rename setrlimit to do_setrlimit Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 12/27] resource: move kernel functions inside __KERNEL__ Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 13/27] core: posix-cpu-timers, cleanup rlimits usage Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 14/27] resource: add helpers for fetching rlimits Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 15/27] IA64: use helpers for rlimits Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 16/27] PPC: " Jiri Slaby
2009-11-28 0:19 ` Benjamin Herrenschmidt [this message]
2009-11-28 8:47 ` Jiri Slaby
2009-11-28 21:16 ` Benjamin Herrenschmidt
2009-11-29 11:06 ` Stephen Rothwell
2009-11-27 23:05 ` [PATCH v3 17/27] S390: " Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 18/27] SPARC: " Jiri Slaby
2009-11-27 23:05 ` [PATCH v3 19/27] X86: " Jiri Slaby
2009-11-27 23:06 ` [PATCH v3 20/27] FS: " Jiri Slaby
2009-11-27 23:06 ` [PATCH v3 21/27] MM: " Jiri Slaby
2009-11-27 23:06 ` [PATCH v3 22/27] core: " Jiri Slaby
2009-11-27 23:06 ` [PATCH v3 23/27] misc: " Jiri Slaby
2009-12-09 23:59 ` Roland Dreier
2009-11-27 23:06 ` [PATCH v3 24/27] core: implement getprlimit and setprlimit syscalls Jiri Slaby
2009-11-27 23:06 ` [PATCH v3 25/27] unistd: add __NR_[get|set]prlimit syscall numbers Jiri Slaby
2009-11-27 23:06 ` [PATCH v3 26/27] COMPAT: add get/put_compat_rlimit Jiri Slaby
2009-11-27 23:06 ` [PATCH v3 27/27] x86: add ia32 compat prlimit syscalls Jiri Slaby
2009-11-27 23:41 ` [PATCH v3 00/27] writable limits Jiri Slaby
2009-11-28 7:28 ` Ingo Molnar
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=1259367557.2076.11.camel@pasglop \
--to=benh@kernel.crashing.org \
--cc=akpm@linux-foundation.org \
--cc=heiko.carstens@de.ibm.com \
--cc=hpa@zytor.com \
--cc=jirislaby@gmail.com \
--cc=jmorris@namei.org \
--cc=jslaby@suse.cz \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=marcin.slusarz@gmail.com \
--cc=mingo@elte.hu \
--cc=mingo@redhat.com \
--cc=nhorman@tuxdriver.com \
--cc=oleg@redhat.com \
--cc=paulus@samba.org \
--cc=sfr@canb.auug.org.au \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
/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