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From: Juergen Gross <jgross@suse.com>
To: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org
Cc: "Boris Ostrovsky" <boris.ostrovsky@oracle.com>,
	"Stefano Stabellini" <sstabellini@kernel.org>,
	stable@vger.kernel.org,
	"Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>
Subject: Re: [PATCH] xen/gntdev: fix gntdev_mmap() error exit path
Date: Mon, 10 May 2021 11:26:31 +0200	[thread overview]
Message-ID: <4b034ebb-4b41-ab00-3cf7-d8943e62474a@suse.com> (raw)
In-Reply-To: <20210423054038.26696-1-jgross@suse.com>


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On 23.04.21 07:40, Juergen Gross wrote:
> Commit d3eeb1d77c5d0af ("xen/gntdev: use mmu_interval_notifier_insert")
> introduced an error in gntdev_mmap(): in case the call of
> mmu_interval_notifier_insert_locked() fails the exit path should not
> call mmu_interval_notifier_remove(), as this might result in NULL
> dereferences.
> 
> One reason for failure is e.g. a signal pending for the running
> process.
> 
> Fixes: d3eeb1d77c5d0af ("xen/gntdev: use mmu_interval_notifier_insert")
> Cc: stable@vger.kernel.org
> Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
> Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
> Signed-off-by: Juergen Gross <jgross@suse.com>

Pushed to xen/tip.git for-linus-5.13b


Juergen

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      parent reply	other threads:[~2021-05-10  9:26 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-23  5:40 Juergen Gross
2021-04-23  6:55 ` Luca Fancellu
2021-04-23  7:00   ` Juergen Gross
2021-04-23  7:04     ` Luca Fancellu
2021-05-08  0:41       ` Marek Marczykowski-Górecki
2021-05-10  9:26 ` Juergen Gross [this message]

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