From: Jason Gunthorpe <jgg@nvidia.com>
To: Pavel Skripkin <paskripkin@gmail.com>
Cc: zyjzyj2000@gmail.com, dledford@redhat.com, leon@kernel.org,
linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
syzbot+aab53008a5adf26abe91@syzkaller.appspotmail.com
Subject: Re: [PATCH] RDMA: fix use-after-free in rxe_queue_cleanup
Date: Thu, 25 Nov 2021 13:25:55 -0400 [thread overview]
Message-ID: <20211125172555.GA490586@nvidia.com> (raw)
In-Reply-To: <20211121202239.3129-1-paskripkin@gmail.com>
On Sun, Nov 21, 2021 at 11:22:39PM +0300, Pavel Skripkin wrote:
> On error handling path in rxe_qp_from_init() qp->sq.queue is freed and
> then rxe_create_qp() will drop last reference to this object. qp clean
> up function will try to free this queue one time and it causes UAF bug.
>
> Fix it by zeroing queue pointer after freeing queue in
> rxe_qp_from_init().
>
> Fixes: 514aee660df4 ("RDMA: Globally allocate and release QP memory")
> Reported-by: syzbot+aab53008a5adf26abe91@syzkaller.appspotmail.com
> Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
> Reviewed-by: Zhu Yanjun <zyjzyj2000@gmail.com>
> ---
> drivers/infiniband/sw/rxe/rxe_qp.c | 1 +
> 1 file changed, 1 insertion(+)
Applied to for-next, thanks
Jason
prev parent reply other threads:[~2021-11-25 17:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-19 9:27 [syzbot] KASAN: use-after-free Read in rxe_queue_cleanup syzbot
2021-11-20 15:02 ` Pavel Skripkin
2021-11-21 14:15 ` Leon Romanovsky
2021-11-21 14:43 ` Zhu Yanjun
2021-11-21 20:22 ` [PATCH] RDMA: fix use-after-free " Pavel Skripkin
2021-11-22 2:04 ` Zhu Yanjun
2021-11-25 17:25 ` Jason Gunthorpe [this message]
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