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From: David Howells <dhowells@redhat.com>
To: Tomas Bortoli <tomasbortoli@gmail.com>
Cc: dhowells@redhat.com, linux-cachefs@redhat.com,
	linux-kernel@vger.kernel.org, syzkaller@googlegroups.com
Subject: Re: [PATCH] fscache: fscache_set_key() - align alloc and usage
Date: Fri, 03 Aug 2018 14:49:30 +0100	[thread overview]
Message-ID: <17157.1533304170@warthog.procyon.org.uk> (raw)
In-Reply-To: <20180722110519.23917-1-tomasbortoli@gmail.com>

Tomas Bortoli <tomasbortoli@gmail.com> wrote:

> The fscache_set_key() function allocates the buf pointer if index_key_len >
> sizeof(cookie->inline_key).  In such cases the allocated space might not be
> aligned with the pointer type.  This may result in an out-of-bound in the
> for-loop later in the same function, as the counter is rounded up.

Yeah, it's good idea anyway since I should tell the allocator everything that
I expect to use - though kmalloc() will effectively rounds up the size to a
multiple of 8 anyway (ie. the smallest allocation granule is 8 bytes).

David

  reply	other threads:[~2018-08-03 13:49 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-22 11:05 Tomas Bortoli
2018-08-03 13:49 ` David Howells [this message]
2018-08-03 17:26   ` Tomas Bortoli

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