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From: Bernd Edlinger <bernd.edlinger@hotmail.de>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Kirill Tkhai <ktkhai@virtuozzo.com>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Christian Brauner <christian.brauner@ubuntu.com>,
	Kees Cook <keescook@chromium.org>, Jann Horn <jannh@google.com>,
	Jonathan Corbet <corbet@lwn.net>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Andrew Morton <akpm@linux-foundation.org>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Oleg Nesterov <oleg@redhat.com>,
	Frederic Weisbecker <frederic@kernel.org>,
	Andrei Vagin <avagin@gmail.com>, Ingo Molnar <mingo@kernel.org>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	Yuyang Du <duyuyang@gmail.com>,
	David Hildenbrand <david@redhat.com>,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Anshuman Khandual <anshuman.khandual@arm.com>,
	David Howells <dhowells@redhat.com>,
	James Morris <jamorris@linux.microsoft.com>,
	Shakeel Butt <shakeelb@google.com>,
	Jason Gunthorpe <jgg@ziepe.ca>,
	Christian Kellner <christian@kellner.me>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Aleksa Sarai <cyphar@cyphar.com>,
	"Dmitry V. Levin" <ldv@altlinux.org>,
	"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"stable@vger.kernel.org" <stable@vger.kernel.org>,
	"linux-api@vger.kernel.org" <linux-api@vger.kernel.org>
Subject: Re: [PATCH v4 3/5] exec: Add a exec_update_mutex to replace cred_guard_mutex
Date: Sat, 21 Mar 2020 23:53:16 +0100
Message-ID: <AM6PR03MB51707C912CFAE40FF965C811E4F20@AM6PR03MB5170.eurprd03.prod.outlook.com> (raw)
In-Reply-To: <20200319091907.GC3495501@kroah.com>

On 3/19/20 10:19 AM, Greg Kroah-Hartman wrote:
> On Thu, Mar 19, 2020 at 10:13:20AM +0100, Bernd Edlinger wrote:
>> Ah, sorry this is actuall v4 5/5.
>> Should I send a new version or can you handle it?
> 
> This thread is a total crazy mess of different versions.
> 
> I know I can't unwind any of this, so I _STRONGLY_ suggest resending the
> whole series, properly versioned, as a new thread.
> 
> Would you want to try to pick out the proper patches from this pile?
> 
> thanks,
> 
> greg k-h
> 

Okay, meanwhile I collected everything I could find from this thread
and sent it again:

[PATCH v6 00/16] Infrastructure to allow fixing exec deadlocks
https://lore.kernel.org/lkml/AM6PR03MB5170B2F5BE24A28980D05780E4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 01/16] exec: Only compute current once in flush_old_exec
https://lore.kernel.org/lkml/AM6PR03MB5170FC93B158EB8179F91D6AE4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 02/16] exec: Factor unshare_sighand out of de_thread and call it separately
https://lore.kernel.org/lkml/AM6PR03MB51708AECEA6E05CAE2FDC166E4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 03/16] exec: Move cleanup of posix timers on exec out of de_thread
https://lore.kernel.org/lkml/AM6PR03MB5170CCB8D8B36F6002446FBDE4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 04/16] exec: Move exec_mmap right after de_thread in flush_old_exec
https://lore.kernel.org/lkml/AM6PR03MB5170FDB2C9B5225224B76398E4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 05/16] exec: Add exec_update_mutex to replace cred_guard_mutex
https://lore.kernel.org/lkml/AM6PR03MB5170739C1B582B37E637279EE4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 06/16] exec: Fix a deadlock in strace
https://lore.kernel.org/lkml/AM6PR03MB51709A321EBA829CC36EE1F8E4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 07/16] selftests/ptrace: add test cases for dead-locks
https://lore.kernel.org/lkml/AM6PR03MB517022530A9BECDBCAADC8D2E4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 08/16] mm: docs: Fix a comment in process_vm_rw_core
https://lore.kernel.org/lkml/AM6PR03MB517027F6ACBB4CF2D9BF014CE4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 09/16] kernel: doc: remove outdated comment cred.c
https://lore.kernel.org/lkml/AM6PR03MB51705CEFAB7D02E6EA6CEBA6E4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 10/16] kernel/kcmp.c: Use new infrastructure to fix deadlocks in execve
https://lore.kernel.org/lkml/AM6PR03MB5170FFDE1D7BF09DD2663EDEE4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 11/16] proc: Use new infrastructure to fix deadlocks in execve
https://lore.kernel.org/lkml/AM6PR03MB5170C4D177DD76E3C65E8033E4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 12/16] proc: io_accounting: Use new infrastructure to fix deadlocks in execve
https://lore.kernel.org/lkml/AM6PR03MB51701CB541B08F21D56DCAC9E4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 13/16] perf: Use new infrastructure to fix deadlocks in execve
https://lore.kernel.org/lkml/AM6PR03MB51704A188C3A1FA02B76B9EFE4F50@AM6PR03MB5170.eurprd03.prod.outlook.com/

[PATCH v6 14/16] pidfd: Use new infrastructure to fix deadlocks in execve
https://lore.kernel.org/lkml/e2ae1c06-b205-a053-d36c-045be27b3138@hotmail.de/

[PATCH v6 15/16] exec: Fix dead-lock in de_thread with ptrace_attach
https://lore.kernel.org/lkml/b6537ae6-31b1-5c50-f32b-8b8332ace882@hotmail.de/

[PATCH v6 16/16] doc: Update documentation of ->exec_*_mutex
https://lore.kernel.org/lkml/3ce46b88-7ed3-2f21-c0ed-8f6055d38ebb@hotmail.de/


Each of the patches in this series build on the previous one and are independent from the following
patches.  So if one or more of these turn out to be controversial, the previous patches are still an
improvement, especially [PATCH v6 06/16] which fixes the deadlock in strace, this one fixes the most
important tracing deadlocks.


Thanks
Bernd.

  parent reply index

Thread overview: 203+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-01 11:27 [PATCH] exec: Fix a deadlock in ptrace Bernd Edlinger
2020-03-01 15:13 ` Aleksa Sarai
2020-03-01 15:58   ` Christian Brauner
2020-03-01 17:46     ` Bernd Edlinger
2020-03-01 18:20       ` Christian Brauner
2020-03-01 17:24   ` Bernd Edlinger
2020-03-01 18:21 ` Jann Horn
2020-03-01 18:52   ` Christian Brauner
2020-03-01 19:00     ` Bernd Edlinger
2020-03-01 20:00     ` Jann Horn
2020-03-01 20:34       ` [PATCHv2] " Bernd Edlinger
2020-03-02  6:38         ` Eric W. Biederman
2020-03-02 15:43           ` Bernd Edlinger
2020-03-02 15:57             ` Eric W. Biederman
2020-03-02 16:02               ` Bernd Edlinger
2020-03-02 16:17                 ` Eric W. Biederman
2020-03-02 16:43                   ` Jann Horn
2020-03-02 17:01                     ` Bernd Edlinger
2020-03-02 17:37                       ` Jann Horn
2020-03-02 17:42                         ` christian
2020-03-02 18:08                           ` Jann Horn
2020-03-02 20:10                             ` [PATCHv3] " Bernd Edlinger
2020-03-02 20:28                               ` Bernd Edlinger
2020-03-02 17:13                   ` [PATCHv2] " Bernd Edlinger
2020-03-02 21:49                     ` Eric W. Biederman
2020-03-02 22:00                       ` Bernd Edlinger
2020-03-02 22:18                       ` [PATCHv4] " Bernd Edlinger
2020-03-03  2:26                         ` Kees Cook
2020-03-03  4:54                           ` Bernd Edlinger
2020-03-03  5:29                             ` Kees Cook
2020-03-03  8:08                               ` Bernd Edlinger
2020-03-03  8:34                                 ` Christian Brauner
2020-03-03  8:43                                   ` Christian Brauner
2020-03-04 15:30                                 ` Christian Brauner
2020-03-03  8:58                           ` Christian Brauner
2020-03-03 10:34                             ` Bernd Edlinger
2020-03-03 11:23                               ` Bernd Edlinger
2020-03-03 14:20                                 ` Christian Brauner
2020-03-03 13:02                             ` [PATCHv5] " Bernd Edlinger
2020-03-03 15:18                               ` Eric W. Biederman
2020-03-03 16:48                                 ` Bernd Edlinger
2020-03-03 17:01                                   ` Christian Brauner
2020-03-03 17:20                                     ` Christian Brauner
2020-03-03 20:08                                   ` Eric W. Biederman
2020-03-04 14:37                                     ` Bernd Edlinger
2020-03-04 16:33                                       ` Eric W. Biederman
2020-03-04 21:49                                         ` Bernd Edlinger
2020-03-04 21:56                                         ` [PATCHv6] " Bernd Edlinger
2020-03-05 18:36                                           ` Bernd Edlinger
2020-03-05 21:14                                             ` [PATCH 0/2] Infrastructure to allow fixing exec deadlocks Eric W. Biederman
2020-03-05 21:15                                               ` [PATCH 1/2] exec: Properly mark the point of no return Eric W. Biederman
2020-03-05 22:34                                                 ` Bernd Edlinger
2020-03-06  5:19                                                   ` Eric W. Biederman
2020-03-05 22:56                                                 ` Bernd Edlinger
2020-03-06  5:09                                                   ` Eric W. Biederman
2020-03-06 16:26                                                     ` Bernd Edlinger
2020-03-06 17:16                                                       ` Eric W. Biederman
2020-03-05 21:16                                               ` [PATCH 2/2] exec: Add a exec_update_mutex to replace cred_guard_mutex Eric W. Biederman
2020-03-05 21:51                                                 ` Bernd Edlinger
2020-03-06  5:17                                                   ` Eric W. Biederman
2020-03-06 11:46                                                     ` Bernd Edlinger
2020-03-06 21:18                                                       ` Eric W. Biederman
2020-03-06 19:16                                                     ` Bernd Edlinger
2020-03-06 21:58                                                       ` Eric W. Biederman
2020-03-06 22:29                                                         ` Eric W. Biederman
2020-03-07  1:03                                                           ` Eric W. Biederman
2020-03-08 12:58                                                             ` [PATCH] exec: make de_thread alloc new signal struct earlier Bernd Edlinger
2020-03-08 18:12                                                               ` Eric W. Biederman
2020-03-05 22:31                                               ` [PATCH 0/2] Infrastructure to allow fixing exec deadlocks Bernd Edlinger
2020-03-06  5:06                                                 ` Eric W. Biederman
2020-03-08 21:34                                               ` [PATCH 0/5] " Eric W. Biederman
2020-03-08 21:35                                                 ` [PATCH v2 1/5] exec: Only compute current once in flush_old_exec Eric W. Biederman
2020-03-09 13:56                                                   ` Bernd Edlinger
2020-03-09 17:34                                                     ` Eric W. Biederman
2020-03-09 17:56                                                       ` Bernd Edlinger
2020-03-09 19:27                                                         ` Bernd Edlinger
2020-03-10 20:17                                                   ` Kees Cook
2020-03-10 21:12                                                   ` Christian Brauner
2020-03-08 21:36                                                 ` [PATCH v2 2/5] exec: Factor unshare_sighand out of de_thread and call it separately Eric W. Biederman
2020-03-09 19:28                                                   ` Bernd Edlinger
2020-03-10 20:29                                                   ` Kees Cook
2020-03-10 20:34                                                     ` Bernd Edlinger
2020-03-10 20:57                                                       ` Kees Cook
2020-03-10 21:21                                                   ` Christian Brauner
2020-03-08 21:36                                                 ` [PATCH v2 3/5] exec: Move cleanup of posix timers on exec out of de_thread Eric W. Biederman
2020-03-09 19:30                                                   ` Bernd Edlinger
2020-03-09 19:59                                                   ` Christian Brauner
2020-03-09 20:06                                                     ` Eric W. Biederman
2020-03-09 20:17                                                       ` Christian Brauner
2020-03-09 20:48                                                         ` Eric W. Biederman
2020-03-10  8:55                                                           ` Christian Brauner
2020-03-10 18:52                                                             ` [PATCH] pidfd: Stop taking cred_guard_mutex Eric W. Biederman
2020-03-10 19:15                                                               ` Christian Brauner
2020-03-10 19:16                                                               ` Jann Horn
2020-03-10 19:27                                                                 ` Eric W. Biederman
2020-03-10 20:00                                                                   ` Jann Horn
2020-03-10 20:10                                                                     ` Jann Horn
2020-03-10 20:22                                                                       ` Bernd Edlinger
2020-03-11  6:11                                                                         ` Bernd Edlinger
2020-03-11 14:56                                                                           ` Jann Horn
2020-03-10 20:57                                                                       ` Eric W. Biederman
2020-03-10 21:29                                                                         ` Christian Brauner
2020-03-11 18:49                                                                         ` Kees Cook
2020-03-14  9:12                                                                           ` [PATCH] pidfd: Use new infrastructure to fix deadlocks in execve Bernd Edlinger
2020-03-10 20:16                                                           ` [PATCH v2 3/5] exec: Move cleanup of posix timers on exec out of de_thread Kees Cook
2020-03-10 20:31                                                   ` Kees Cook
2020-03-10 20:57                                                   ` Jann Horn
2020-03-10 21:05                                                     ` Eric W. Biederman
2020-03-10 21:22                                                   ` Christian Brauner
2020-03-08 21:38                                                 ` [PATCH v2 4/5] exec: Move exec_mmap right after de_thread in flush_old_exec Eric W. Biederman
2020-03-09 19:34                                                   ` Bernd Edlinger
2020-03-09 19:45                                                     ` Eric W. Biederman
2020-03-09 19:52                                                       ` Bernd Edlinger
2020-03-09 19:58                                                         ` Eric W. Biederman
2020-03-09 20:03                                                           ` Bernd Edlinger
2020-03-09 20:35                                                             ` Eric W. Biederman
2020-03-10 20:44                                                   ` Kees Cook
2020-03-10 21:20                                                     ` Eric W. Biederman
2020-03-10 20:47                                                   ` Kees Cook
2020-03-10 21:09                                                     ` Eric W. Biederman
2020-03-08 21:38                                                 ` [PATCH v2 5/5] exec: Add a exec_update_mutex to replace cred_guard_mutex Eric W. Biederman
2020-03-09 13:45                                                   ` Bernd Edlinger
2020-03-09 17:40                                                     ` Eric W. Biederman
2020-03-09 18:01                                                       ` Bernd Edlinger
2020-03-09 18:10                                                         ` Eric W. Biederman
2020-03-09 18:24                                                           ` Eric W. Biederman
2020-03-09 18:36                                                             ` Eric W. Biederman
2020-03-09 18:47                                                               ` Bernd Edlinger
2020-03-09 19:02                                                                 ` Eric W. Biederman
2020-03-09 19:24                                                                   ` Bernd Edlinger
2020-03-09 19:35                                                                     ` Eric W. Biederman
2020-03-09 19:39                                                                     ` Eric W. Biederman
2020-03-10 13:43                                                                       ` [PATCH 0/4] Use new infrastructure to fix deadlocks in execve Bernd Edlinger
2020-03-10 15:35                                                                         ` Eric W. Biederman
2020-03-10 17:44                                                                           ` [PATCH 0/4] Use new infrastructure in more simple cases Bernd Edlinger
2020-03-10 17:45                                                                           ` [PATCH 1/4] kernel/kcmp.c: Use new infrastructure to fix deadlocks in execve Bernd Edlinger
2020-03-10 19:01                                                                             ` Eric W. Biederman
2020-03-10 19:42                                                                               ` Bernd Edlinger
2020-03-10 17:45                                                                           ` [PATCH 2/4] proc: " Bernd Edlinger
2020-03-11 18:59                                                                             ` Kees Cook
2020-03-11 19:10                                                                             ` Kees Cook
2020-03-11 19:38                                                                               ` Bernd Edlinger
2020-03-10 17:45                                                                           ` [PATCH 3/4] proc: io_accounting: " Bernd Edlinger
2020-03-10 19:06                                                                             ` Eric W. Biederman
2020-03-10 20:19                                                                               ` Bernd Edlinger
2020-03-10 21:25                                                                                 ` Eric W. Biederman
2020-03-11 19:08                                                                             ` Kees Cook
2020-03-11 19:48                                                                               ` Bernd Edlinger
2020-03-11 19:48                                                                               ` Eric W. Biederman
2020-03-10 17:45                                                                           ` [PATCH 4/4] perf: " Bernd Edlinger
2020-03-10 13:43                                                                       ` [PATCH 1/4] exec: Fix a deadlock in ptrace Bernd Edlinger
2020-03-10 15:13                                                                         ` Eric W. Biederman
2020-03-10 15:17                                                                           ` Bernd Edlinger
2020-03-10 21:00                                                                         ` Kees Cook
2020-03-10 13:44                                                                       ` [PATCH 2/4] selftests/ptrace: add test cases for dead-locks Bernd Edlinger
2020-03-10 21:36                                                                         ` Kees Cook
2020-03-10 22:41                                                                         ` Dmitry V. Levin
2020-03-10 13:44                                                                       ` [PATCH 3/4] mm: docs: Fix a comment in process_vm_rw_core Bernd Edlinger
2020-03-11 18:53                                                                         ` Kees Cook
2020-03-10 13:44                                                                       ` [PATCH 4/4] kernel: doc: remove outdated comment cred.c Bernd Edlinger
2020-03-11 18:54                                                                         ` Kees Cook
2020-03-09 19:33                                                                   ` [PATCH v2 5/5] exec: Add a exec_update_mutex to replace cred_guard_mutex Dmitry V. Levin
2020-03-09 19:42                                                                     ` Eric W. Biederman
2020-03-10 20:55                                                                   ` Kees Cook
2020-03-10 21:02                                                                     ` Eric W. Biederman
2020-03-10 21:21                                                   ` Jann Horn
2020-03-10 21:30                                                     ` Eric W. Biederman
2020-03-10 23:21                                                       ` Jann Horn
2020-03-11  0:15                                                         ` Eric W. Biederman
2020-03-11  6:33                                                           ` Bernd Edlinger
2020-03-11 16:29                                                             ` Eric W. Biederman
2020-03-11 13:18                                                   ` Qian Cai
2020-03-12 10:27                                                   ` Kirill Tkhai
2020-03-12 12:24                                                     ` Eric W. Biederman
2020-03-12 13:45                                                       ` Kirill Tkhai
2020-03-12 14:38                                                         ` Eric W. Biederman
2020-03-12 15:23                                                           ` Kirill Tkhai
2020-03-13  1:05                                                           ` Bernd Edlinger
2020-03-13  9:13                                                             ` Kirill Tkhai
2020-03-14  9:11                                                               ` [PATCH v3 " Bernd Edlinger
2020-03-17  8:56                                                                 ` Kirill Tkhai
2020-03-17 21:53                                                                   ` Bernd Edlinger
2020-03-18 12:22                                                                     ` Kirill Tkhai
2020-03-18 20:06                                                                       ` Bernd Edlinger
2020-03-19  7:13                                                                         ` Kirill Tkhai
2020-03-19  7:19                                                                           ` Bernd Edlinger
2020-03-19  9:11                                                                           ` [PATCH v4 3/5] " Bernd Edlinger
2020-03-19  9:13                                                                             ` Bernd Edlinger
2020-03-19  9:19                                                                               ` Greg Kroah-Hartman
2020-03-19  9:20                                                                                 ` Bernd Edlinger
2020-03-21 22:53                                                                                 ` Bernd Edlinger [this message]
2020-03-14  9:12                                                               ` [PATCH 0/2] exec: Fix dead-lock in de_thread with ptrace_attach Bernd Edlinger
2020-03-14  9:12                                                               ` [PATCH 1/2] " Bernd Edlinger
2020-03-14  9:13                                                               ` [PATCH 2/2] doc: Update documentation of ->exec_*_mutex Bernd Edlinger
2020-03-14  9:57                                                               ` [PATCH v2 5/5] exec: Add a exec_update_mutex to replace cred_guard_mutex Bernd Edlinger
2020-03-14 10:02                                                                 ` Bernd Edlinger
2020-03-17  8:58                                                                   ` Kirill Tkhai
2020-03-09 13:58                                                 ` [PATCH 0/5] Infrastructure to allow fixing exec deadlocks Bernd Edlinger
2020-03-03 16:50                                 ` [PATCHv5] exec: Fix a deadlock in ptrace Christian Brauner
2020-03-02 12:28         ` [PATCHv2] " Oleg Nesterov
2020-03-02 15:56           ` Bernd Edlinger
2020-03-02  7:47       ` [PATCH] " Christian Brauner
2020-03-02  7:48         ` Christian Brauner

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