From: Christopher Lameter <cl@linux.com>
To: Qian Cai <cai@lca.pw>
Cc: axboe@kernel.dk, viro@zeniv.linux.org.uk, hare@suse.com,
bcrl@kvack.org, linux-aio@kvack.org,
Linux-MM <linux-mm@kvack.org>
Subject: Re: io_submit with slab free object overwritten
Date: Fri, 22 Feb 2019 15:36:42 +0000 [thread overview]
Message-ID: <0100016915da021c-63475bd3-9a4f-4a88-a42e-e47dab17fa00-000000@email.amazonses.com> (raw)
In-Reply-To: <4a56fc9f-27f7-5cb5-feed-a4e33f05a5d1@lca.pw>
On Fri, 22 Feb 2019, Qian Cai wrote:
> [23424.121182] BUG aio_kiocb (Tainted: G B W L ): Poison overwritten
> [23424.121322] Object 00000000e207f30b: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
> 6b 6b 6b kkkkkkkkkkkkkkkk
> [23424.121326] Object 00000000a7a45634: 6b 6b 6b 6b 6b 6b 6b 6b ff ff ff ff 6b
> 6b 6b 6b kkkkkkkk....kkkk
Looks like a decrement of a counter after free. You can find the field by
calculating the offset from the beginning of the object and then use the
struct definition to find that.
next prev parent reply other threads:[~2019-02-22 15:36 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-22 5:40 Qian Cai
2019-02-22 15:36 ` Christopher Lameter [this message]
2019-02-22 21:07 ` Qian Cai
2019-02-22 21:42 ` Eric Sandeen
2019-02-22 21:48 ` Qian Cai
2019-02-22 21:58 ` Eric Sandeen
2019-02-22 22:06 ` Qian Cai
2019-02-22 22:25 ` Jeff Moyer
2019-02-22 22:40 ` Jens Axboe
2019-02-23 1:58 ` Qian Cai
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