From: David Howells <dhowells@redhat.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: dhowells@redhat.com, David Sterba <dsterba@suse.cz>,
Eric Biggers <ebiggers@kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/2] pipe: Fixes [ver #2]
Date: Fri, 06 Dec 2019 21:26:12 +0000 [thread overview]
Message-ID: <15058.1575667572@warthog.procyon.org.uk> (raw)
In-Reply-To: <CAHk-=wiN_pWbcRaw5L-J2EFUyCn49Due0McwETKwmFFPp88K8Q@mail.gmail.com>
Linus Torvalds <torvalds@linux-foundation.org> wrote:
> I think I found it.
>
> TOTALLY UNTESTED patch appended. It's whitespace-damaged and may be
> completely wrong. And might not fix it.
>
> The first hunk is purely syntactic sugar - use the normal head/tail
> order. The second/third hunk is what I think fixes the problem:
> iter_file_splice_write() had the same buggy "let's cache
> head/tail/mask" pattern as pipe_write() had.
>
> You can't cache them over a 'pipe_wait()' that drops the pipe lock,
> and there's one in splice_from_pipe_next().
That seems to fix it.
Tested-by: David Howells <dhowells@redhat.com>
prev parent reply other threads:[~2019-12-06 21:26 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-05 22:30 [PATCH 0/2] pipe: Fixes [ver #2] David Howells
2019-12-05 22:30 ` [PATCH 1/2] pipe: Remove assertion from pipe_poll() " David Howells
2019-12-05 22:30 ` [PATCH 2/2] pipe: Fix missing mask update after pipe_wait() " David Howells
2019-12-05 23:58 ` Linus Torvalds
2019-12-06 13:56 ` [PATCH 0/2] pipe: Fixes " David Sterba
2019-12-06 17:09 ` Linus Torvalds
2019-12-06 17:42 ` Linus Torvalds
2019-12-06 18:59 ` Linus Torvalds
2019-12-07 21:31 ` Akemi Yagi
2019-12-07 21:31 ` Akemi Yagi
2019-12-08 16:45 ` Akemi Yagi
2019-12-08 18:04 ` Linus Torvalds
2019-12-09 3:07 ` Linus Torvalds
2019-12-06 20:28 ` Linus Torvalds
2019-12-06 21:04 ` Linus Torvalds
2019-12-07 3:50 ` Linus Torvalds
2019-12-07 4:01 ` Linus Torvalds
2019-12-07 22:47 ` Linus Torvalds
2019-12-09 9:53 ` Vincent Guittot
2019-12-09 17:48 ` Linus Torvalds
2019-12-09 17:57 ` Akemi Yagi
2019-12-09 18:18 ` Linus Torvalds
2019-12-09 18:24 ` Linus Torvalds
2019-12-18 20:59 ` Josh Triplett
2019-12-10 2:58 ` DJ Delorie
2019-12-10 14:38 ` Vincent Guittot
2019-12-10 17:39 ` Linus Torvalds
2019-12-11 18:09 ` DJ Delorie
2019-12-11 18:59 ` Linus Torvalds
2019-12-12 10:18 ` Konstantin Khlebnikov
2019-12-18 22:51 ` Linus Torvalds
2019-12-19 0:03 ` Josh Triplett
2019-12-19 0:14 ` Josh Triplett
2019-12-19 0:51 ` Linus Torvalds
2019-12-19 0:54 ` Linus Torvalds
2019-12-19 7:56 ` David Howells
2019-12-19 16:35 ` Linus Torvalds
2019-12-11 20:55 ` David Howells
2019-12-12 1:28 ` Linus Torvalds
2019-12-12 7:34 ` David Howells
2019-12-09 14:55 ` David Sterba
2019-12-06 21:26 ` David Howells [this message]
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