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From: Steven Rostedt <rostedt@goodmis.org>
To: Rick Edgecombe <rick.p.edgecombe@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>, Ingo Molnar <mingo@redhat.com>,
	linux-kernel@vger.kernel.org, x86@kernel.org, hpa@zytor.com,
	Thomas Gleixner <tglx@linutronix.de>,
	Borislav Petkov <bp@alien8.de>, Nadav Amit <nadav.amit@gmail.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Peter Zijlstra <peterz@infradead.org>,
	linux_dti@icloud.com, linux-integrity@vger.kernel.org,
	linux-security-module@vger.kernel.org, akpm@linux-foundation.org,
	kernel-hardening@lists.openwall.com, linux-mm@kvack.org,
	will.deacon@arm.com, ard.biesheuvel@linaro.org,
	kristen@linux.intel.com, deneen.t.dock@intel.com,
	Rusty Russell <rusty@rustcorp.com.au>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Alexei Starovoitov <ast@kernel.org>, Jessica Yu <jeyu@kernel.org>,
	"Paul E . McKenney" <paulmck@linux.ibm.com>
Subject: Re: [PATCH 16/17] Plug in new special vfree flag
Date: Wed, 6 Feb 2019 11:23:56 -0500	[thread overview]
Message-ID: <20190206112356.64cc5f0d@gandalf.local.home> (raw)
In-Reply-To: <20190117003259.23141-17-rick.p.edgecombe@intel.com>

On Wed, 16 Jan 2019 16:32:58 -0800
Rick Edgecombe <rick.p.edgecombe@intel.com> wrote:

> Add new flag for handling freeing of special permissioned memory in vmalloc
> and remove places where memory was set RW before freeing which is no longer
> needed.
> 
> In kprobes, bpf and ftrace this just adds the flag, and removes the now
> unneeded set_memory_ calls before calling vfree.
> 
> In modules, the freeing of init sections is moved to a work queue, since
> freeing of RO memory is not supported in an interrupt by vmalloc.
> Instead of call_rcu, it now uses synchronize_rcu() in the work queue.
> 
> Cc: Rusty Russell <rusty@rustcorp.com.au>
> Cc: Masami Hiramatsu <mhiramat@kernel.org>
> Cc: Daniel Borkmann <daniel@iogearbox.net>
> Cc: Alexei Starovoitov <ast@kernel.org>
> Cc: Jessica Yu <jeyu@kernel.org>
> Cc: Steven Rostedt <rostedt@goodmis.org>
> Cc: Paul E. McKenney <paulmck@linux.ibm.com>
> Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
> ---
>  arch/x86/kernel/ftrace.c       |  6 +--

For the ftrace code.

Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

-- Steve

>  arch/x86/kernel/kprobes/core.c |  7 +---
>  include/linux/filter.h         | 16 ++-----
>  kernel/bpf/core.c              |  1 -
>  kernel/module.c                | 77 +++++++++++++++++-----------------
>  5 files changed, 45 insertions(+), 62 deletions(-)
>

  reply	other threads:[~2019-02-06 16:24 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-17  0:32 [PATCH 00/17] Merge text_poke fixes and executable lockdowns Rick Edgecombe
2019-01-17  0:32 ` [PATCH 01/17] Fix "x86/alternatives: Lockdep-enforce text_mutex in text_poke*()" Rick Edgecombe
2019-01-17  6:47   ` Masami Hiramatsu
2019-01-17 21:15     ` hpa
2019-01-17 22:39       ` Nadav Amit
2019-01-17 22:59         ` hpa
2019-01-17 23:14           ` Nadav Amit
2019-01-25  9:30   ` Borislav Petkov
2019-01-25 18:28     ` Nadav Amit
2019-01-17  0:32 ` [PATCH 02/17] x86/jump_label: Use text_poke_early() during early init Rick Edgecombe
2019-01-17  0:32 ` [PATCH 03/17] x86/mm: temporary mm struct Rick Edgecombe
2019-01-17  0:32 ` [PATCH 04/17] fork: provide a function for copying init_mm Rick Edgecombe
2019-01-17  0:32 ` [PATCH 05/17] x86/alternative: initializing temporary mm for patching Rick Edgecombe
2019-01-17  0:32 ` [PATCH 06/17] x86/alternative: use temporary mm for text poking Rick Edgecombe
2019-01-17 20:27   ` Andy Lutomirski
2019-01-17 20:47     ` Andy Lutomirski
2019-01-17 21:43       ` Nadav Amit
2019-01-17 22:29         ` Nadav Amit
2019-01-17 22:31         ` hpa
2019-01-17  0:32 ` [PATCH 07/17] x86/kgdb: avoid redundant comparison of patched code Rick Edgecombe
2019-01-17  0:32 ` [PATCH 08/17] x86/ftrace: set trampoline pages as executable Rick Edgecombe
2019-02-06 16:22   ` Steven Rostedt
2019-02-06 17:33     ` Nadav Amit
2019-02-06 17:41       ` Steven Rostedt
2019-01-17  0:32 ` [PATCH 09/17] x86/kprobes: Instruction pages initialization enhancements Rick Edgecombe
2019-01-17  6:51   ` Masami Hiramatsu
2019-01-17  0:32 ` [PATCH 10/17] x86: avoid W^X being broken during modules loading Rick Edgecombe
2019-01-17  0:32 ` [PATCH 11/17] x86/jump-label: remove support for custom poker Rick Edgecombe
2019-01-17  0:32 ` [PATCH 12/17] x86/alternative: Remove the return value of text_poke_*() Rick Edgecombe
2019-01-17  0:32 ` [PATCH 13/17] Add set_alias_ function and x86 implementation Rick Edgecombe
2019-01-17  0:32 ` [PATCH 14/17] mm: Make hibernate handle unmapped pages Rick Edgecombe
2019-01-17  9:39   ` Pavel Machek
2019-01-17 22:16     ` Edgecombe, Rick P
2019-01-17 23:41       ` Pavel Machek
2019-01-17 23:48         ` Edgecombe, Rick P
2019-01-18  8:16           ` Pavel Machek
2019-01-17  0:32 ` [PATCH 15/17] vmalloc: New flags for safe vfree on special perms Rick Edgecombe
2019-01-17  0:32 ` [PATCH 16/17] Plug in new special vfree flag Rick Edgecombe
2019-02-06 16:23   ` Steven Rostedt [this message]
2019-02-07 17:33     ` Edgecombe, Rick P
2019-02-07 17:49       ` Steven Rostedt
2019-02-07 18:20         ` Edgecombe, Rick P
2019-01-17  0:32 ` [PATCH 17/17] module: Prevent module removal racing with text_poke() Rick Edgecombe
2019-01-17  7:54   ` Masami Hiramatsu
2019-01-17 18:07     ` Nadav Amit
2019-01-17 23:44       ` H. Peter Anvin
2019-01-18  8:23       ` Masami Hiramatsu
2019-01-17 23:58     ` H. Peter Anvin
2019-01-18  1:15       ` Nadav Amit
2019-01-18 13:32         ` Masami Hiramatsu
2019-01-17 13:21 ` [PATCH 00/17] Merge text_poke fixes and executable lockdowns Peter Zijlstra

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