From: Andrey Konovalov <andreyknvl@google.com>
To: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org,
dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org,
linux-media@vger.kernel.org, kvm@vger.kernel.org,
linux-kselftest@vger.kernel.org
Cc: Mark Rutland <mark.rutland@arm.com>,
Szabolcs Nagy <Szabolcs.Nagy@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Kostya Serebryany <kcc@google.com>,
Khalid Aziz <khalid.aziz@oracle.com>,
Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
Felix Kuehling <Felix.Kuehling@amd.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Jacob Bramley <Jacob.Bramley@arm.com>,
Leon Romanovsky <leon@kernel.org>,
Christoph Hellwig <hch@infradead.org>,
Jason Gunthorpe <jgg@ziepe.ca>, Dave Martin <Dave.Martin@arm.com>,
Evgeniy Stepanov <eugenis@google.com>,
Kevin Brodsky <kevin.brodsky@arm.com>,
Kees Cook <keescook@chromium.org>,
Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>,
Andrey Konovalov <andreyknvl@google.com>,
Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>,
Alex Williamson <alex.williamson@redhat.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Dmitry Vyukov <dvyukov@google.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Yishai Hadas <yishaih@mellanox.com>,
Jens Wiklander <jens.wiklander@linaro.org>,
Lee Smith <Lee.Smith@arm.com>,
Alexander Deucher <Alexander.Deucher@amd.com>,
Andrew Morton <akpm@linux-foundation.org>, enh <enh@google.com>,
Robin Murphy <robin.murphy@arm.com>,
Christian Koenig <Christian.Koenig@amd.com>,
Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Subject: [PATCH v16 13/16] media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get
Date: Mon, 3 Jun 2019 18:55:15 +0200 [thread overview]
Message-ID: <31821f3538ddacb7e57e0248e86a3d28f9789d2f.1559580831.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1559580831.git.andreyknvl@google.com>
This patch is a part of a series that extends arm64 kernel ABI to allow to
pass tagged user pointers (with the top byte set to something else other
than 0x00) as syscall arguments.
videobuf_dma_contig_user_get() uses provided user pointers for vma
lookups, which can only by done with untagged pointers.
Untag the pointers in this function.
Acked-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
drivers/media/v4l2-core/videobuf-dma-contig.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/media/v4l2-core/videobuf-dma-contig.c b/drivers/media/v4l2-core/videobuf-dma-contig.c
index e1bf50df4c70..8a1ddd146b17 100644
--- a/drivers/media/v4l2-core/videobuf-dma-contig.c
+++ b/drivers/media/v4l2-core/videobuf-dma-contig.c
@@ -160,6 +160,7 @@ static void videobuf_dma_contig_user_put(struct videobuf_dma_contig_memory *mem)
static int videobuf_dma_contig_user_get(struct videobuf_dma_contig_memory *mem,
struct videobuf_buffer *vb)
{
+ unsigned long untagged_baddr = untagged_addr(vb->baddr);
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
unsigned long prev_pfn, this_pfn;
@@ -167,22 +168,22 @@ static int videobuf_dma_contig_user_get(struct videobuf_dma_contig_memory *mem,
unsigned int offset;
int ret;
- offset = vb->baddr & ~PAGE_MASK;
+ offset = untagged_baddr & ~PAGE_MASK;
mem->size = PAGE_ALIGN(vb->size + offset);
ret = -EINVAL;
down_read(&mm->mmap_sem);
- vma = find_vma(mm, vb->baddr);
+ vma = find_vma(mm, untagged_baddr);
if (!vma)
goto out_up;
- if ((vb->baddr + mem->size) > vma->vm_end)
+ if ((untagged_baddr + mem->size) > vma->vm_end)
goto out_up;
pages_done = 0;
prev_pfn = 0; /* kill warning */
- user_address = vb->baddr;
+ user_address = untagged_baddr;
while (pages_done < (mem->size >> PAGE_SHIFT)) {
ret = follow_pfn(vma, user_address, &this_pfn);
--
2.22.0.rc1.311.g5d7573a151-goog
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next prev parent reply other threads:[~2019-06-03 16:58 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-03 16:55 [PATCH v16 00/16] arm64: untag user pointers passed to the kernel Andrey Konovalov
2019-06-03 16:55 ` [PATCH v16 01/16] uaccess: add untagged_addr definition for other arches Andrey Konovalov
2019-06-03 17:02 ` Khalid Aziz
2019-06-03 17:06 ` Andrey Konovalov
2019-06-03 17:24 ` Khalid Aziz
2019-06-03 17:29 ` Christoph Hellwig
2019-06-03 18:17 ` Khalid Aziz
2019-06-04 11:45 ` Andrey Konovalov
2019-06-03 16:55 ` [PATCH v16 02/16] arm64: untag user pointers in access_ok and __uaccess_mask_ptr Andrey Konovalov
2019-06-08 3:51 ` Kees Cook
2019-06-10 17:53 ` Catalin Marinas
2019-06-10 18:07 ` Kees Cook
2019-06-10 18:53 ` Catalin Marinas
2019-06-10 20:36 ` Kees Cook
2019-06-11 14:57 ` Catalin Marinas
2019-06-11 17:09 ` Vincenzo Frascino
2019-06-12 9:32 ` Catalin Marinas
2019-06-12 11:52 ` Vincenzo Frascino
2019-06-11 17:09 ` Andrey Konovalov
2019-06-11 17:39 ` Catalin Marinas
2019-06-12 11:03 ` Andrey Konovalov
2019-06-12 11:04 ` Catalin Marinas
2019-06-03 16:55 ` [PATCH v16 03/16] lib, arm64: untag user pointers in strn*_user Andrey Konovalov
2019-06-08 3:48 ` Kees Cook
2019-06-11 20:06 ` Khalid Aziz
2019-06-03 16:55 ` [PATCH v16 04/16] mm: untag user pointers in do_pages_move Andrey Konovalov
2019-06-08 3:49 ` Kees Cook
2019-06-11 20:18 ` Khalid Aziz
2019-06-12 11:08 ` Andrey Konovalov
2019-06-03 16:55 ` [PATCH v16 05/16] arm64: untag user pointers passed to memory syscalls Andrey Konovalov
2019-06-08 3:51 ` Kees Cook
2019-06-10 14:28 ` Catalin Marinas
2019-06-11 15:35 ` Andrey Konovalov
2019-06-11 17:44 ` Catalin Marinas
2019-06-12 11:13 ` Andrey Konovalov
2019-06-03 16:55 ` [PATCH v16 06/16] mm, arm64: untag user pointers in mm/gup.c Andrey Konovalov
2019-06-08 3:59 ` Kees Cook
2019-06-03 16:55 ` [PATCH v16 07/16] mm, arm64: untag user pointers in get_vaddr_frames Andrey Konovalov
2019-06-08 4:00 ` Kees Cook
2019-06-10 14:29 ` Catalin Marinas
2019-06-03 16:55 ` [PATCH v16 08/16] fs, arm64: untag user pointers in copy_mount_options Andrey Konovalov
2019-06-08 4:02 ` Kees Cook
2019-06-11 14:38 ` Andrey Konovalov
2019-06-12 11:36 ` Andrey Konovalov
2019-06-03 16:55 ` [PATCH v16 09/16] fs, arm64: untag user pointers in fs/userfaultfd.c Andrey Konovalov
2019-06-08 4:03 ` Kees Cook
2019-06-12 10:45 ` Catalin Marinas
2019-06-03 16:55 ` [PATCH v16 10/16] drm/amdgpu, arm64: untag user pointers Andrey Konovalov
2019-06-03 16:55 ` [PATCH v16 11/16] drm/radeon, arm64: untag user pointers in radeon_gem_userptr_ioctl Andrey Konovalov
2019-06-03 16:55 ` [PATCH v16 12/16] IB, arm64: untag user pointers in ib_uverbs_(re)reg_mr() Andrey Konovalov
2019-06-03 17:46 ` Jason Gunthorpe
2019-06-04 12:18 ` Andrey Konovalov
2019-06-04 12:27 ` Jason Gunthorpe
2019-06-04 12:45 ` Andrey Konovalov
2019-06-04 13:02 ` Jason Gunthorpe
2019-06-04 13:09 ` Andrey Konovalov
2019-06-12 11:01 ` Catalin Marinas
2019-06-03 16:55 ` Andrey Konovalov [this message]
2019-06-08 3:52 ` [PATCH v16 13/16] media/v4l2-core, arm64: untag user pointers in videobuf_dma_contig_user_get Kees Cook
2019-06-03 16:55 ` [PATCH v16 14/16] tee, arm64: untag user pointers in tee_shm_register Andrey Konovalov
2019-06-07 5:33 ` Jens Wiklander
2019-06-08 4:05 ` Kees Cook
2019-06-03 16:55 ` [PATCH v16 15/16] vfio/type1, arm64: untag user pointers in vaddr_get_pfn Andrey Konovalov
2019-06-08 3:58 ` Kees Cook
2019-06-12 10:38 ` Catalin Marinas
2019-06-03 16:55 ` [PATCH v16 16/16] selftests, arm64: add a selftest for passing tagged pointers to kernel Andrey Konovalov
2019-06-08 3:56 ` Kees Cook
2019-06-10 22:08 ` shuah
2019-06-11 15:01 ` Catalin Marinas
2019-06-11 17:18 ` Andrey Konovalov
2019-06-11 17:50 ` Catalin Marinas
2019-06-12 11:14 ` Andrey Konovalov
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