From: Souptick Joarder <jrdr.linux@gmail.com> To: akpm@linux-foundation.org, willy@infradead.org, mhocko@suse.com, boris.ostrovsky@oracle.com, jgross@suse.com, linux@armlinux.org.uk, robin.murphy@arm.com Cc: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RESEND PATCH v4 8/9] xen/gntdev.c: Convert to use vm_map_pages() Date: Tue, 19 Mar 2019 08:00:07 +0530 [thread overview] Message-ID: <88e56e82d2db98705c2d842e9c9806c00b366d67.1552921225.git.jrdr.linux@gmail.com> (raw) In-Reply-To: <cover.1552921225.git.jrdr.linux@gmail.com> Convert to use vm_map_pages() to map range of kernel memory to user vma. map->count is passed to vm_map_pages() and internal API verify map->count against count ( count = vma_pages(vma)) for page array boundary overrun condition. Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> --- drivers/xen/gntdev.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index 5efc5ee..5d64262 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -1084,7 +1084,7 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma) int index = vma->vm_pgoff; int count = vma_pages(vma); struct gntdev_grant_map *map; - int i, err = -EINVAL; + int err = -EINVAL; if ((vma->vm_flags & VM_WRITE) && !(vma->vm_flags & VM_SHARED)) return -EINVAL; @@ -1145,12 +1145,9 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma) goto out_put_map; if (!use_ptemod) { - for (i = 0; i < count; i++) { - err = vm_insert_page(vma, vma->vm_start + i*PAGE_SIZE, - map->pages[i]); - if (err) - goto out_put_map; - } + err = vm_map_pages(vma, map->pages, map->count); + if (err) + goto out_put_map; } else { #ifdef CONFIG_X86 /* -- 1.9.1
WARNING: multiple messages have this Message-ID (diff)
From: Souptick Joarder <jrdr.linux@gmail.com> To: akpm@linux-foundation.org, willy@infradead.org, mhocko@suse.com, kirill.shutemov@linux.intel.com, vbabka@suse.cz, riel@surriel.com, sfr@canb.auug.org.au, rppt@linux.vnet.ibm.com, peterz@infradead.org, linux@armlinux.org.uk, robin.murphy@arm.com, iamjoonsoo.kim@lge.com, treding@nvidia.com, keescook@chromium.org, m.szyprowski@samsung.com, stefanr@s5r6.in-berlin.de, hjc@rock-chips.com, heiko@sntech.de, airlied@linux.ie, oleksandr_andrushchenko@epam.com, joro@8bytes.org, pawel@osciak.com, kyungmin.park@samsung.com, mchehab@kernel.org, boris.ostrovsky@oracle.com, jgross@suse.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux1394-devel@lists.sourceforge.net, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, xen-devel@lists.xen.org, iommu@lists.linux-foundation.org, linux-media@vger.kernel.org, Souptick Joarder <jrdr.linux@gmail.com> Subject: [REBASE PATCH v5 8/9] xen/gntdev.c: Convert to use vm_map_pages() Date: Tue, 16 Apr 2019 17:19:49 +0530 [thread overview] Message-ID: <88e56e82d2db98705c2d842e9c9806c00b366d67.1552921225.git.jrdr.linux@gmail.com> (raw) Message-ID: <20190416114949.IriRKxpAeJXsUkH7hIQA6h6wH62Kqd6458itbcZ0JXk@z> (raw) In-Reply-To: <cover.1552921225.git.jrdr.linux@gmail.com> In-Reply-To: <cover.1552921225.git.jrdr.linux@gmail.com> Convert to use vm_map_pages() to map range of kernel memory to user vma. map->count is passed to vm_map_pages() and internal API verify map->count against count ( count = vma_pages(vma)) for page array boundary overrun condition. Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> --- drivers/xen/gntdev.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index 5efc5ee..5d64262 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -1084,7 +1084,7 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma) int index = vma->vm_pgoff; int count = vma_pages(vma); struct gntdev_grant_map *map; - int i, err = -EINVAL; + int err = -EINVAL; if ((vma->vm_flags & VM_WRITE) && !(vma->vm_flags & VM_SHARED)) return -EINVAL; @@ -1145,12 +1145,9 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma) goto out_put_map; if (!use_ptemod) { - for (i = 0; i < count; i++) { - err = vm_insert_page(vma, vma->vm_start + i*PAGE_SIZE, - map->pages[i]); - if (err) - goto out_put_map; - } + err = vm_map_pages(vma, map->pages, map->count); + if (err) + goto out_put_map; } else { #ifdef CONFIG_X86 /* -- 1.9.1
next prev parent reply other threads:[~2019-03-19 2:25 UTC|newest] Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-03-19 2:22 [RESEND PATCH v4 0/9] mm: Use vm_map_pages() and vm_map_pages_zero() API Souptick Joarder 2019-03-19 2:23 ` [RESEND PATCH v4 1/9] mm: Introduce new " Souptick Joarder 2019-04-16 11:49 ` [REBASE PATCH v5 " Souptick Joarder 2019-03-19 2:24 ` [RESEND PATCH v4 2/9] arm: mm: dma-mapping: Convert to use vm_map_pages() Souptick Joarder 2019-04-16 11:49 ` [REBASE PATCH v5 " Souptick Joarder 2019-03-19 2:25 ` [RESEND PATCH v4 3/9] drivers/firewire/core-iso.c: Convert to use vm_map_pages_zero() Souptick Joarder 2019-04-16 11:49 ` [REBASE PATCH v5 " Souptick Joarder 2019-03-19 2:26 ` [RESEND PATCH v4 4/9] drm/rockchip/rockchip_drm_gem.c: Convert to use vm_map_pages() Souptick Joarder 2019-04-16 11:49 ` [REBASE PATCH v5 " Souptick Joarder 2019-03-19 2:27 ` [RESEND PATCH v4 5/9] drm/xen/xen_drm_front_gem.c: " Souptick Joarder 2019-04-16 11:49 ` [REBASE PATCH v5 " Souptick Joarder 2019-03-19 2:28 ` [RESEND PATCH v4 6/9] iommu/dma-iommu.c: " Souptick Joarder 2019-04-16 11:49 ` [REBASE PATCH v5 " Souptick Joarder 2019-03-19 2:29 ` [RESEND PATCH v4 7/9] videobuf2/videobuf2-dma-sg.c: " Souptick Joarder 2019-04-16 11:49 ` [REBASE PATCH v5 " Souptick Joarder 2019-03-19 2:30 ` Souptick Joarder [this message] 2019-04-16 11:49 ` [REBASE PATCH v5 8/9] xen/gntdev.c: " Souptick Joarder 2019-03-19 2:30 ` [RESEND PATCH v4 9/9] xen/privcmd-buf.c: Convert to use vm_map_pages_zero() Souptick Joarder 2019-04-16 11:49 ` [REBASE PATCH v5 " Souptick Joarder 2019-04-01 5:26 ` [RESEND PATCH v4 0/9] mm: Use vm_map_pages() and vm_map_pages_zero() API Souptick Joarder 2019-04-09 6:17 ` Souptick Joarder 2019-04-16 11:49 ` [REBASE PATCH v5 " Souptick Joarder
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