From: Jens Freimann <jfrei@linux.vnet.ibm.com>
Date: Mon, 16 Mar 2015 11:17:13 +0000 (+0100)
Subject: KVM: s390: fix get_all_floating_irqs
X-Git-Tag: omap-for-v4.2/o2_dc~192^2~19^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=94aa033efcac47b09db22cb561e135baf37b7887;p=pandora-kernel.git

KVM: s390: fix get_all_floating_irqs

This fixes a bug introduced with commit c05c4186bbe4 ("KVM: s390:
add floating irq controller").

get_all_floating_irqs() does copy_to_user() while holding
a spin lock. Let's fix this by filling a temporary buffer
first and copy it to userspace after giving up the lock.

Cc: <stable@vger.kernel.org> # 3.18+: 69a8d4562638 KVM: s390: no need to hold...

Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---

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