From: Matthew Wilcox <willy@infradead.org>
To: Chen Huang <chenhuang5@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Al Viro <viro@zeniv.linux.org.uk>,
Randy Dunlap <rdunlap@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
linux-mm <linux-mm@kvack.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [BUG] arm64: an infinite loop in generic_perform_write()
Date: Thu, 24 Jun 2021 04:24:46 +0100 [thread overview]
Message-ID: <YNP6/p/yJzLLr8M8@casper.infradead.org> (raw)
In-Reply-To: <1c635945-fb25-8871-7b34-f475f75b2caf@huawei.com>
On Thu, Jun 24, 2021 at 11:10:41AM +0800, Chen Huang wrote:
> In userspace, I perform such operation:
>
> fd = open("/tmp/test", O_RDWR | O_SYNC);
> access_address = (char *)mmap(NULL, uio_size, PROT_READ, MAP_SHARED, uio_fd, 0);
> ret = write(fd, access_address + 2, sizeof(long));
... you know that accessing this at unaligned offsets isn't going to
work. It's completely meaningless. Why are you trying to do it?
next prev parent reply other threads:[~2021-06-24 3:26 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-23 2:39 [BUG] arm64: an infinite loop in generic_perform_write() Chen Huang
2021-06-23 2:50 ` Al Viro
2021-06-23 3:24 ` Xiaoming Ni
2021-06-23 4:27 ` Al Viro
2021-06-23 9:32 ` Catalin Marinas
2021-06-23 11:51 ` Matthew Wilcox
2021-06-23 13:04 ` Al Viro
2021-06-23 13:22 ` Mark Rutland
2021-06-24 3:10 ` Chen Huang
2021-06-24 3:24 ` Matthew Wilcox [this message]
2021-06-24 3:52 ` Chen Huang
2021-06-24 7:04 ` Christoph Hellwig
2021-06-24 11:15 ` Matthew Wilcox
2021-06-24 13:22 ` Robin Murphy
2021-06-24 16:27 ` Al Viro
2021-06-24 16:38 ` Robin Murphy
2021-06-24 16:39 ` Al Viro
2021-06-24 17:24 ` Robin Murphy
2021-06-24 18:55 ` Catalin Marinas
2021-06-24 20:36 ` Robin Murphy
2021-06-25 10:39 ` Catalin Marinas
2021-06-28 16:22 ` Robin Murphy
2021-06-29 8:30 ` Catalin Marinas
2021-06-29 10:01 ` Robin Murphy
2021-07-06 17:50 ` Catalin Marinas
2021-07-06 19:15 ` Robin Murphy
2021-07-07 9:55 ` David Laight
2021-07-07 11:04 ` Robin Murphy
2021-07-07 12:50 ` Catalin Marinas
2021-06-24 15:09 ` Catalin Marinas
2021-06-24 16:17 ` Al Viro
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