From: Oleg Nesterov <oleg@redhat.com>
To: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: schwidefsky@de.ibm.com, linux-kernel@vger.kernel.org,
torvalds@linux-foundation.org, akpm@linux-foundation.org
Subject: Re: [PATCH] kernel/kmod: fix use-after-free of the sub_info structure
Date: Thu, 16 Oct 2014 19:42:09 +0200 [thread overview]
Message-ID: <20141016174209.GB18318@redhat.com> (raw)
In-Reply-To: <201410170157.AFH86961.FQtFHJVLOFSOOM@I-love.SAKURA.ne.jp>
On 10/17, Tetsuo Handa wrote:
>
> For both UMH_NO_WAIT and UMH_WAIT_EXEC cases,
>
> kernel_thread(call_helper, sub_info, CLONE_VFORK | SIGCHLD)
>
> in __call_usermodehelper() waits for do_execve() to succeed or do_exit(),
Well, not really. kernel_thread(CLONE_VFORK) waits for do_exit() or
exec_mmap(), and exec can fail after that.
Oleg.
next prev parent reply other threads:[~2014-10-16 17:45 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-16 14:00 [PATCH] kernel/kmod: fix use-after-free of the sub_info structure Martin Schwidefsky
2014-10-16 16:57 ` Tetsuo Handa
2014-10-16 17:42 ` Oleg Nesterov [this message]
2014-10-16 21:30 ` [PATCH] kernel/kmod: fix use-after-free of the sub_infostructure Tetsuo Handa
2014-10-16 21:58 ` Oleg Nesterov
2014-10-17 7:04 ` Martin Schwidefsky
2014-10-17 7:36 ` Martin Schwidefsky
2014-10-17 12:55 ` [PATCH] kernel/kmod: fix use-after-free of the sub_info structure Tetsuo Handa
2014-10-17 15:21 ` [PATCH] kernel/kmod: fix use-after-free of the sub_infostructure Oleg Nesterov
2014-10-17 19:15 ` [PATCH 0/2] (Was: kernel/kmod: fix use-after-free of the sub_infostructure) Oleg Nesterov
2014-10-17 19:16 ` [PATCH 1/2] usermodehelper: don't use CLONE_VFORK for ____call_usermodehelper() Oleg Nesterov
2014-10-17 19:16 ` [PATCH 2/2] usermodehelper: kill the kmod_thread_locker logic Oleg Nesterov
2014-10-17 23:54 ` [PATCH 0/2] (Was: kernel/kmod: fix use-after-free of thesub_infostructure) Tetsuo Handa
2014-10-17 7:02 ` [PATCH] kernel/kmod: fix use-after-free of the sub_infostructure Martin Schwidefsky
2014-10-16 17:37 ` [PATCH] kernel/kmod: fix use-after-free of the sub_info structure Oleg Nesterov
2014-10-16 20:16 ` Oleg Nesterov
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