From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Ross Lagerwall <ross.lagerwall@citrix.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Sasha Levin <alexander.levin@microsoft.com>
Subject: [PATCH 3.18 21/24] xen/gntdev: Fix off-by-one error when unmapping with holes
Date: Fri, 2 Mar 2018 09:51:18 +0100 [thread overview]
Message-ID: <20180302084240.180620324@linuxfoundation.org> (raw)
In-Reply-To: <20180302084239.157503766@linuxfoundation.org>
3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ross Lagerwall <ross.lagerwall@citrix.com>
[ Upstream commit 951a010233625b77cde3430b4b8785a9a22968d1 ]
If the requested range has a hole, the calculation of the number of
pages to unmap is off by one. Fix it.
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/xen/gntdev.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -348,10 +348,8 @@ static int unmap_grant_pages(struct gran
}
range = 0;
while (range < pages) {
- if (map->unmap_ops[offset+range].handle == -1) {
- range--;
+ if (map->unmap_ops[offset+range].handle == -1)
break;
- }
range++;
}
err = __unmap_grant_pages(map, offset, range);
next prev parent reply other threads:[~2018-03-02 8:53 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-02 8:50 [PATCH 3.18 00/24] 3.18.98-stable review Greg Kroah-Hartman
2018-03-02 8:50 ` [PATCH 3.18 01/24] ipv6: Skip XFRM lookup if dst_entry in socket cache is valid Greg Kroah-Hartman
2018-03-02 8:50 ` [PATCH 3.18 02/24] hrtimer: Ensure POSIX compliance (relative CLOCK_REALTIME hrtimers) Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 03/24] mtd: nand: gpmi: Fix failure when a erased page has a bitflip at BBM Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 04/24] ipv6: icmp6: Allow icmp messages to be looped back Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 05/24] sget(): handle failures of register_shrinker() Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 06/24] spi: atmel: fixed spin_lock usage inside atmel_spi_remove Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 07/24] net: arc_emac: fix arc_emac_rx() error paths Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 08/24] scsi: storvsc: Fix scsi_cmd error assignments in storvsc_handle_error Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 09/24] tg3: Add workaround to restrict 5762 MRRS to 2048 Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 10/24] tg3: Enable PHY reset in MTU change path for 5720 Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 11/24] bnx2x: Improve reliability in case of nested PCI errors Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 12/24] led: core: Fix brightness setting when setting delay_off=0 Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 13/24] s390/dasd: fix wrongly assigned configuration data Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 14/24] xfs: quota: fix missed destroy of qi_tree_lock Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 15/24] xfs: quota: check result of register_shrinker() Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 16/24] e1000: fix disabling already-disabled warning Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 17/24] drm/ttm: check the return value of kzalloc Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 18/24] xen-netfront: enable device after manual module load Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 19/24] mdio-sun4i: Fix a memory leak Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 20/24] SolutionEngine771x: fix Ether platform data Greg Kroah-Hartman
2018-03-02 8:51 ` Greg Kroah-Hartman [this message]
2018-03-02 8:51 ` [PATCH 3.18 22/24] xen/gntdev: Fix partial gntdev_mmap() cleanup Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 23/24] sctp: make use of pre-calculated len Greg Kroah-Hartman
2018-03-02 8:51 ` [PATCH 3.18 24/24] net: gianfar_ptp: move set_fipers() to spinlock protecting area Greg Kroah-Hartman
2018-03-02 12:58 ` [PATCH 3.18 00/24] 3.18.98-stable review kernelci.org bot
2018-03-02 17:33 ` Guenter Roeck
2018-03-02 17:41 ` Harsh Shandilya
2018-03-02 18:53 ` Greg Kroah-Hartman
2018-03-02 21:31 ` Shuah Khan
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