From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-667456-1519839809-2-8301358740497399800 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.249, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES enro, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='uk', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1519839808; b=KoORIbv8J7kuFFHS4jjE+ADba95eOUymdDu7Vbhcc5dtDyO nfsbVrHjitarUc+zb9BDGyBo9tzVDBQOAe/djs0jim+itBf3onoIZ50cdqROIfId 7ucq0ehSWfJYplObUpLB/vztx/EGfWjPGXTQyfZgrNw5aYoeuElB2IlcqIHiPItt QO51+WYPCSr9Howgi9JiaZa/ULOqHYxzAsK13pqna6SOsZjEejHgh1uSEONhwGbf +zJsu5afdwL3LMgm9346/Mhf52HwHDQVnguu7KiePsndO8QJKGs0YLXtSi76dQID c7FOEQ/u4VoJ61in/B3A2s+mUuBcdUBsKmHun3Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=content-type:content-transfer-encoding :mime-version:from:to:cc:date:message-id:subject:in-reply-to :sender:list-id; s=arctest; t=1519839808; bh=zu6zbZr2jxXFF7PMCCI qT9+gA/Mjcl/QVS/oSHwtPas=; b=hcPA6hSE38LJGcq7h+HhMczKfwnfYfMIzW5 +D745Wz4MYxWhH26/9ZirWLZ02wMy4mOClpqd620ZvIX879i6iOsLHQJCwYRdqJC WsWOI7hVF3FsLaVBnItxnMQ1VUE6K4YrPonm4NN0eGB03Fz7nDVkvP5/+yMUmBvw g6MVCsZpEo5ROlD3CIYhVqxN1vZ454ryyqVx+vb3ixPhjdwmDO7PqWJbgV5zP+Af Id837f7/Kgor61vaowrJek0RnhfPU+kuCIon/dSIhRdJhKYwoSZxgH7ZgZhtiPqT aodH84nBSxsgkqJekI8WwxGTKWJyUCSdAZThU3+6Z2w225hSNSA== ARC-Authentication-Results: i=1; mx4.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=decadent.org.uk; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=decadent.org.uk header.result=pass header_is_org_domain=yes Authentication-Results: mx4.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=decadent.org.uk; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=decadent.org.uk header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933954AbeB1Rkg (ORCPT ); Wed, 28 Feb 2018 12:40:36 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:33127 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932483AbeB1PWM (ORCPT ); Wed, 28 Feb 2018 10:22:12 -0500 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Hans Verkuil" , "Mauro Carvalho Chehab" , "Sakari Ailus" Date: Wed, 28 Feb 2018 15:20:22 +0000 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.2 131/140] media: v4l2-compat-ioctl32.c: avoid sizeof(type) In-Reply-To: X-SA-Exim-Connect-IP: 2a02:8011:400e:2:6f00:88c8:c921:d332 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 3.2.100-rc1 review patch. If anyone has any objections, please let me know. ------------------ 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 [bwh: Rebased on top of some earlier fixes] Signed-off-by: Ben Hutchings --- --- a/drivers/media/video/v4l2-compat-ioctl32.c +++ b/drivers/media/video/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))) @@ -156,14 +156,14 @@ 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); @@ -207,14 +207,14 @@ 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))) + 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)) || + 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; @@ -233,7 +233,7 @@ 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; @@ -241,13 +241,13 @@ 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) || put_user(kp->id, &up->id) || - 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; } @@ -293,7 +293,7 @@ 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) { @@ -304,7 +304,7 @@ static int get_v4l2_plane32(struct v4l2_ return -EFAULT; } else { if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset, - sizeof(__u32))) + sizeof(up32->m.mem_offset))) return -EFAULT; } @@ -316,14 +316,14 @@ 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; return 0; @@ -337,7 +337,7 @@ 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) || @@ -349,8 +349,7 @@ 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)) { @@ -370,13 +369,13 @@ 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)); + sizeof(*uplane)); kp->m.planes = (__force struct v4l2_plane *)uplane; while (--num_planes >= 0) { @@ -422,7 +421,7 @@ 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) || @@ -434,7 +433,7 @@ 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->reserved, &up->reserved)) return -EFAULT; @@ -489,7 +488,7 @@ 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) || @@ -503,7 +502,7 @@ 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) || @@ -528,14 +527,14 @@ 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; } @@ -583,7 +582,7 @@ 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) || @@ -597,10 +596,9 @@ 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; @@ -632,7 +630,7 @@ 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) || @@ -644,8 +642,7 @@ 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) { @@ -682,14 +679,14 @@ 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) || put_user(kp->sequence, &up->sequence) || put_compat_timespec(&kp->timestamp, &up->timestamp) || 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; }