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Wed, 4 Apr 2018 11:32:57 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:43888 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751976AbeDDPcy (ORCPT ); Wed, 4 Apr 2018 11:32:54 -0400 Subject: Patch "media: v4l2-compat-ioctl32.c: avoid sizeof(type)" has been added to the 3.18-stable tree To: mchehab@s-opensource.com, alexander.levin@microsoft.com, gregkh@linuxfoundation.org, hans.verkuil@cisco.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@infradead.org, sakari.ailus@linux.intel.com Cc: , From: Date: Wed, 04 Apr 2018 17:32:43 +0200 In-Reply-To: Message-ID: <152285596322238@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit X-stable: commit Sender: stable-commits-owner@vger.kernel.org Reply-To: linux-kernel@vger.kernel.org X-Mailing-List: stable-commits@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled media: v4l2-compat-ioctl32.c: avoid sizeof(type) to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Wed Apr 4 17:30:18 CEST 2018 From: Mauro Carvalho Chehab Date: Wed, 28 Mar 2018 15:12:25 -0300 Subject: media: v4l2-compat-ioctl32.c: avoid sizeof(type) To: Linux Media Mailing List , stable@vger.kernel.org Cc: Hans Verkuil , Mauro Carvalho Chehab , Linux Kernel Mailing List , Mauro Carvalho Chehab , Sasha Levin Message-ID: From: Hans Verkuil commit 333b1e9f96ce05f7498b581509bb30cde03018bf upstream. Instead of doing sizeof(struct foo) use sizeof(*up). There even were cases where 4 * sizeof(__u32) was used instead of sizeof(kp->reserved), which is very dangerous when the size of the reserved array changes. Signed-off-by: Hans Verkuil Acked-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 80 ++++++++++++-------------- 1 file changed, 38 insertions(+), 42 deletions(-) --- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c +++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c @@ -47,7 +47,7 @@ struct v4l2_window32 { static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up) { - if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_window32)) || + if (!access_ok(VERIFY_READ, up, sizeof(*up)) || copy_from_user(&kp->w, &up->w, sizeof(up->w)) || get_user(kp->field, &up->field) || get_user(kp->chromakey, &up->chromakey) || @@ -64,7 +64,7 @@ static int get_v4l2_window32(struct v4l2 if (get_user(p, &up->clips)) return -EFAULT; uclips = compat_ptr(p); - kclips = compat_alloc_user_space(n * sizeof(struct v4l2_clip)); + kclips = compat_alloc_user_space(n * sizeof(*kclips)); kp->clips = kclips; while (--n >= 0) { if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c))) @@ -152,14 +152,14 @@ static int __get_v4l2_format32(struct v4 static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up) { - if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_format32))) + if (!access_ok(VERIFY_READ, up, sizeof(*up))) return -EFAULT; return __get_v4l2_format32(kp, up); } static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up) { - if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_create_buffers32)) || + if (!access_ok(VERIFY_READ, up, sizeof(*up)) || copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format))) return -EFAULT; return __get_v4l2_format32(&kp->format, &up->format); @@ -196,17 +196,17 @@ static int __put_v4l2_format32(struct v4 static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up) { - if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32)) || - put_user(kp->type, &up->type)) + if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) return -EFAULT; return __put_v4l2_format32(kp, up); } static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up) { - if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_create_buffers32)) || - copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format.fmt))) - return -EFAULT; + if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || + copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format)) || + copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved))) + return -EFAULT; return __put_v4l2_format32(&kp->format, &up->format); } @@ -222,7 +222,7 @@ struct v4l2_standard32 { static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up) { /* other fields are not set by the user, nor used by the driver */ - if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) || + if (!access_ok(VERIFY_READ, up, sizeof(*up)) || get_user(kp->index, &up->index)) return -EFAULT; return 0; @@ -230,13 +230,13 @@ static int get_v4l2_standard32(struct v4 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up) { - if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) || + if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || put_user(kp->index, &up->index) || copy_to_user(up->id, &kp->id, sizeof(__u64)) || - copy_to_user(up->name, kp->name, 24) || + copy_to_user(up->name, kp->name, sizeof(up->name)) || copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) || put_user(kp->framelines, &up->framelines) || - copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32))) + copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved))) return -EFAULT; return 0; } @@ -284,7 +284,7 @@ static int get_v4l2_plane32(struct v4l2_ if (copy_in_user(up, up32, 2 * sizeof(__u32)) || copy_in_user(&up->data_offset, &up32->data_offset, - sizeof(__u32))) + sizeof(up->data_offset))) return -EFAULT; if (memory == V4L2_MEMORY_USERPTR) { @@ -294,11 +294,11 @@ static int get_v4l2_plane32(struct v4l2_ if (put_user((unsigned long)up_pln, &up->m.userptr)) return -EFAULT; } else if (memory == V4L2_MEMORY_DMABUF) { - if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(int))) + if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(up32->m.fd))) return -EFAULT; } else { if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset, - sizeof(__u32))) + sizeof(up32->m.mem_offset))) return -EFAULT; } @@ -310,19 +310,19 @@ static int put_v4l2_plane32(struct v4l2_ { if (copy_in_user(up32, up, 2 * sizeof(__u32)) || copy_in_user(&up32->data_offset, &up->data_offset, - sizeof(__u32))) + sizeof(up->data_offset))) return -EFAULT; /* For MMAP, driver might've set up the offset, so copy it back. * USERPTR stays the same (was userspace-provided), so no copying. */ if (memory == V4L2_MEMORY_MMAP) if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset, - sizeof(__u32))) + sizeof(up->m.mem_offset))) return -EFAULT; /* For DMABUF, driver might've set up the fd, so copy it back. */ if (memory == V4L2_MEMORY_DMABUF) if (copy_in_user(&up32->m.fd, &up->m.fd, - sizeof(int))) + sizeof(up->m.fd))) return -EFAULT; return 0; @@ -336,7 +336,7 @@ static int get_v4l2_buffer32(struct v4l2 int num_planes; int ret; - if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) || + if (!access_ok(VERIFY_READ, up, sizeof(*up)) || get_user(kp->index, &up->index) || get_user(kp->type, &up->type) || get_user(kp->flags, &up->flags) || @@ -348,8 +348,7 @@ static int get_v4l2_buffer32(struct v4l2 if (get_user(kp->bytesused, &up->bytesused) || get_user(kp->field, &up->field) || get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) || - get_user(kp->timestamp.tv_usec, - &up->timestamp.tv_usec)) + get_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec)) return -EFAULT; if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) { @@ -366,13 +365,12 @@ static int get_v4l2_buffer32(struct v4l2 uplane32 = compat_ptr(p); if (!access_ok(VERIFY_READ, uplane32, - num_planes * sizeof(struct v4l2_plane32))) + num_planes * sizeof(*uplane32))) return -EFAULT; /* We don't really care if userspace decides to kill itself * by passing a very big num_planes value */ - uplane = compat_alloc_user_space(num_planes * - sizeof(struct v4l2_plane)); + uplane = compat_alloc_user_space(num_planes * sizeof(*uplane)); kp->m.planes = (__force struct v4l2_plane *)uplane; while (--num_planes >= 0) { @@ -420,7 +418,7 @@ static int put_v4l2_buffer32(struct v4l2 int num_planes; int ret; - if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) || + if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || put_user(kp->index, &up->index) || put_user(kp->type, &up->type) || put_user(kp->flags, &up->flags) || @@ -431,7 +429,7 @@ static int put_v4l2_buffer32(struct v4l2 put_user(kp->field, &up->field) || put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) || put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) || - copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) || + copy_to_user(&up->timecode, &kp->timecode, sizeof(kp->timecode)) || put_user(kp->sequence, &up->sequence) || put_user(kp->reserved2, &up->reserved2) || put_user(kp->reserved, &up->reserved) || @@ -499,7 +497,7 @@ static int get_v4l2_framebuffer32(struct { u32 tmp; - if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) || + if (!access_ok(VERIFY_READ, up, sizeof(*up)) || get_user(tmp, &up->base) || get_user(kp->capability, &up->capability) || get_user(kp->flags, &up->flags) || @@ -513,7 +511,7 @@ static int put_v4l2_framebuffer32(struct { u32 tmp = (u32)((unsigned long)kp->base); - if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) || + if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || put_user(tmp, &up->base) || put_user(kp->capability, &up->capability) || put_user(kp->flags, &up->flags) || @@ -537,14 +535,14 @@ struct v4l2_input32 { Otherwise it is identical to the 32-bit version. */ static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up) { - if (copy_from_user(kp, up, sizeof(struct v4l2_input32))) + if (copy_from_user(kp, up, sizeof(*up))) return -EFAULT; return 0; } static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up) { - if (copy_to_user(up, kp, sizeof(struct v4l2_input32))) + if (copy_to_user(up, kp, sizeof(*up))) return -EFAULT; return 0; } @@ -592,7 +590,7 @@ static int get_v4l2_ext_controls32(struc int n; compat_caddr_t p; - if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) || + if (!access_ok(VERIFY_READ, up, sizeof(*up)) || get_user(kp->ctrl_class, &up->ctrl_class) || get_user(kp->count, &up->count) || get_user(kp->error_idx, &up->error_idx) || @@ -606,10 +604,9 @@ static int get_v4l2_ext_controls32(struc if (get_user(p, &up->controls)) return -EFAULT; ucontrols = compat_ptr(p); - if (!access_ok(VERIFY_READ, ucontrols, - n * sizeof(struct v4l2_ext_control32))) + if (!access_ok(VERIFY_READ, ucontrols, n * sizeof(*ucontrols))) return -EFAULT; - kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control)); + kcontrols = compat_alloc_user_space(n * sizeof(*kcontrols)); kp->controls = (__force struct v4l2_ext_control *)kcontrols; while (--n >= 0) { u32 id; @@ -641,7 +638,7 @@ static int put_v4l2_ext_controls32(struc int n = kp->count; compat_caddr_t p; - if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) || + if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || put_user(kp->ctrl_class, &up->ctrl_class) || put_user(kp->count, &up->count) || put_user(kp->error_idx, &up->error_idx) || @@ -653,8 +650,7 @@ static int put_v4l2_ext_controls32(struc if (get_user(p, &up->controls)) return -EFAULT; ucontrols = compat_ptr(p); - if (!access_ok(VERIFY_WRITE, ucontrols, - n * sizeof(struct v4l2_ext_control32))) + if (!access_ok(VERIFY_WRITE, ucontrols, n * sizeof(*ucontrols))) return -EFAULT; while (--n >= 0) { @@ -690,7 +686,7 @@ struct v4l2_event32 { static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up) { - if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) || + if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || put_user(kp->type, &up->type) || copy_to_user(&up->u, &kp->u, sizeof(kp->u)) || put_user(kp->pending, &up->pending) || @@ -698,7 +694,7 @@ static int put_v4l2_event32(struct v4l2_ put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) || put_user(kp->timestamp.tv_nsec, &up->timestamp.tv_nsec) || put_user(kp->id, &up->id) || - copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32))) + copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved))) return -EFAULT; return 0; } @@ -715,7 +711,7 @@ static int get_v4l2_edid32(struct v4l2_e { u32 tmp; - if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_edid32)) || + if (!access_ok(VERIFY_READ, up, sizeof(*up)) || get_user(kp->pad, &up->pad) || get_user(kp->start_block, &up->start_block) || get_user(kp->blocks, &up->blocks) || @@ -730,7 +726,7 @@ static int put_v4l2_edid32(struct v4l2_e { u32 tmp = (u32)((unsigned long)kp->edid); - if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_edid32)) || + if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || put_user(kp->pad, &up->pad) || put_user(kp->start_block, &up->start_block) || put_user(kp->blocks, &up->blocks) || Patches currently in stable-queue which might be from mchehab@s-opensource.com are queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch