lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:   Thu, 20 Jan 2022 15:24:34 -0600
From:   "Gustavo A. R. Silva" <>
To:     Hans Verkuil <>,
        Mauro Carvalho Chehab <>
        "Gustavo A. R. Silva" <>,
Subject: [PATCH][next] media: usb: pwc-uncompress: Use struct_size() helper
 in pwc_decompress()

Make use of the struct_size() helper instead of an open-coded version,
in order to avoid any potential type mistakes or integer overflows that,
in the worst scenario, could lead to heap overflows.

Also, address the following sparse warnings:
drivers/media/usb/pwc/pwc-uncompress.c:44:44: warning: using sizeof on a flexible structure

Signed-off-by: Gustavo A. R. Silva <>
 drivers/media/usb/pwc/pwc-uncompress.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/usb/pwc/pwc-uncompress.c b/drivers/media/usb/pwc/pwc-uncompress.c
index 68bc3829c6b3..faf44cdeb268 100644
--- a/drivers/media/usb/pwc/pwc-uncompress.c
+++ b/drivers/media/usb/pwc/pwc-uncompress.c
@@ -41,7 +41,7 @@ int pwc_decompress(struct pwc_device *pdev, struct pwc_frame_buf *fbuf)
 		memcpy(raw_frame->cmd, pdev->cmd_buf, 4);
 		memcpy(raw_frame+1, yuv, pdev->frame_size);
 		vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0,
-			pdev->frame_size + sizeof(struct pwc_raw_frame));
+			struct_size(raw_frame, rawframe, pdev->frame_size));
 		return 0;

Powered by blists - more mailing lists