From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Russell King - ARM Linux <linux@armlinux.org.uk>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Richard Henderson <rth@twiddle.net>,
Will Deacon <will.deacon@arm.com>,
Haavard Skinnemoen <hskinnemoen@gmail.com>,
Vineet Gupta <vgupta@synopsys.com>,
Steven Miao <realmz6@gmail.com>,
Jesper Nilsson <jesper.nilsson@axis.com>,
Mark Salter <msalter@redhat.com>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Richard Kuo <rkuo@codeaurora.org>,
Tony Luck <tony.luck@intel.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
James Hogan <james.hogan@imgtec.com>,
Michal Simek <monstr@monstr.eu>,
David Howells <dhowells@redhat.com>,
Ley Foon Tan <lftan@altera.com>, Jonas Bonn <jonas@southpole.se>,
Helge Deller <deller@gmx.de>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Ralf Baechle <ralf@linux-mips.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Chen Liqin <liqin.linux@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Chris Metcalf <cmetcalf@mellanox.com>,
Richard Weinberger <richard@nod.at>,
Guan Xuetao <gxt@mprc.pku.edu.cn>,
Thomas Gleixner <tglx@linutronix.de>,
Chris Zankel <chris@zankel.net>
Subject: Re: [RFC][CFT][PATCHSET v1] uaccess unification
Date: Thu, 30 Mar 2017 19:54:27 +0100 [thread overview]
Message-ID: <20170330185427.GT29622@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20170330184824.GS29622@ZenIV.linux.org.uk>
On Thu, Mar 30, 2017 at 07:48:24PM +0100, Al Viro wrote:
> BTW, ..._inatomic is a very unfortunate name, IMO - it's *not* safe
> to use in atomic contexts as-is, to start with; the caller needs to take
> care of pagefault_disable(). If anything, __copy_from_user_nofault() would
> probably be better...
Not even that - again, it will happily trigger page faults unless the
caller disables those. __copy_from_user_I_know_what_I_am_doing()?
WARNING: multiple messages have this Message-ID (diff)
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Russell King - ARM Linux <linux@armlinux.org.uk>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Richard Henderson <rth@twiddle.net>,
Will Deacon <will.deacon@arm.com>,
Haavard Skinnemoen <hskinnemoen@gmail.com>,
Vineet Gupta <vgupta@synopsys.com>,
Steven Miao <realmz6@gmail.com>,
Jesper Nilsson <jesper.nilsson@axis.com>,
Mark Salter <msalter@redhat.com>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Richard Kuo <rkuo@codeaurora.org>,
Tony Luck <tony.luck@intel.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
James Hogan <james.hogan@imgtec.com>,
Michal Simek <monstr@monstr.eu>,
David Howells <dhowells@redhat.com>,
Ley Foon Tan <lftan@altera.com>, Jonas Bonn <jonas@southpole>
Subject: Re: [RFC][CFT][PATCHSET v1] uaccess unification
Date: Thu, 30 Mar 2017 19:54:27 +0100 [thread overview]
Message-ID: <20170330185427.GT29622@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20170330184824.GS29622@ZenIV.linux.org.uk>
On Thu, Mar 30, 2017 at 07:48:24PM +0100, Al Viro wrote:
> BTW, ..._inatomic is a very unfortunate name, IMO - it's *not* safe
> to use in atomic contexts as-is, to start with; the caller needs to take
> care of pagefault_disable(). If anything, __copy_from_user_nofault() would
> probably be better...
Not even that - again, it will happily trigger page faults unless the
caller disables those. __copy_from_user_I_know_what_I_am_doing()?
next prev parent reply other threads:[~2017-03-30 18:54 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-29 5:57 [RFC][CFT][PATCHSET v1] uaccess unification Al Viro
2017-03-29 5:57 ` Al Viro
2017-03-29 20:08 ` Vineet Gupta
2017-03-29 20:08 ` Vineet Gupta
2017-03-29 20:08 ` Vineet Gupta
2017-03-29 20:29 ` Al Viro
2017-03-29 20:29 ` Al Viro
2017-03-29 20:37 ` Linus Torvalds
2017-03-29 20:37 ` Linus Torvalds
2017-03-29 21:03 ` Al Viro
2017-03-29 21:03 ` Al Viro
2017-03-29 21:24 ` Linus Torvalds
2017-03-29 21:24 ` Linus Torvalds
2017-03-29 23:09 ` Al Viro
2017-03-29 23:09 ` Al Viro
2017-03-29 23:43 ` Linus Torvalds
2017-03-29 23:43 ` Linus Torvalds
2017-03-30 15:31 ` Al Viro
2017-03-30 15:31 ` Al Viro
2017-03-29 21:14 ` Vineet Gupta
2017-03-29 21:14 ` Vineet Gupta
2017-03-29 23:42 ` Al Viro
2017-03-29 23:42 ` Al Viro
2017-03-30 0:02 ` Vineet Gupta
2017-03-30 0:02 ` Vineet Gupta
2017-03-30 0:27 ` Linus Torvalds
2017-03-30 0:27 ` Linus Torvalds
2017-03-30 1:15 ` Al Viro
2017-03-30 1:15 ` Al Viro
2017-03-30 20:40 ` Vineet Gupta
2017-03-30 20:40 ` Vineet Gupta
2017-03-30 20:59 ` Linus Torvalds
2017-03-30 20:59 ` Linus Torvalds
2017-03-30 23:21 ` Russell King - ARM Linux
2017-03-30 23:21 ` Russell King - ARM Linux
2017-03-30 12:32 ` Martin Schwidefsky
2017-03-30 12:32 ` Martin Schwidefsky
2017-03-30 14:48 ` Al Viro
2017-03-30 14:48 ` Al Viro
2017-03-30 16:22 ` Russell King - ARM Linux
2017-03-30 16:22 ` Russell King - ARM Linux
2017-03-30 16:43 ` Al Viro
2017-03-30 16:43 ` Al Viro
2017-03-30 17:18 ` Linus Torvalds
2017-03-30 17:18 ` Linus Torvalds
2017-03-30 18:48 ` Al Viro
2017-03-30 18:48 ` Al Viro
2017-03-30 18:54 ` Al Viro [this message]
2017-03-30 18:54 ` Al Viro
2017-03-30 18:59 ` Linus Torvalds
2017-03-30 18:59 ` Linus Torvalds
2017-03-30 19:10 ` Al Viro
2017-03-30 19:10 ` Al Viro
2017-03-30 19:19 ` Linus Torvalds
2017-03-30 19:19 ` Linus Torvalds
2017-03-30 21:08 ` Al Viro
2017-03-30 21:08 ` Al Viro
2017-03-30 18:56 ` Linus Torvalds
2017-03-30 18:56 ` Linus Torvalds
2017-03-31 0:21 ` Kees Cook
2017-03-31 0:21 ` Kees Cook
2017-03-31 13:38 ` James Hogan
2017-03-31 13:38 ` James Hogan
2017-04-03 16:27 ` James Morse
2017-04-03 16:27 ` James Morse
2017-04-04 20:26 ` Max Filippov
2017-04-04 20:26 ` Max Filippov
2017-04-04 20:26 ` Max Filippov
2017-04-04 20:52 ` Al Viro
2017-04-04 20:52 ` Al Viro
2017-04-05 5:05 ` ia64 exceptions (Re: [RFC][CFT][PATCHSET v1] uaccess unification) Al Viro
2017-04-05 5:05 ` Al Viro
2017-04-05 8:08 ` Al Viro
2017-04-05 8:08 ` Al Viro
2017-04-05 18:44 ` Tony Luck
2017-04-05 18:44 ` Tony Luck
2017-04-05 20:33 ` Al Viro
2017-04-05 20:33 ` Al Viro
2017-04-07 0:24 ` [RFC][CFT][PATCHSET v2] uaccess unification Al Viro
2017-04-07 0:24 ` Al Viro
2017-04-07 0:35 ` Al Viro
2017-04-07 0:35 ` Al Viro
[not found] <CACVxJT8+fQqvpSPb9rTWFy6g7moqUqxi+Ewjcg0ykuqo=vm4Ow@mail.gmail.com>
2017-03-30 13:27 ` [RFC][CFT][PATCHSET v1] " Alexey Dobriyan
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