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authorJulia Lawall <Julia.Lawall@lip6.fr>2018-07-01 19:32:05 +0200
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>2018-07-25 14:35:12 +0200
commit2e3134caf63694bf1dbb2e68829871e14d543613 (patch)
tree55db564e291bf8ef073c902ae49fb2a05f408038 /drivers/media/usb/gspca
parentmedia: tw686x: Fix oops on buffer alloc failure (diff)
downloadlinux-2e3134caf63694bf1dbb2e68829871e14d543613.tar.xz
linux-2e3134caf63694bf1dbb2e68829871e14d543613.zip
media: gspca_kinect: cast sizeof to int for comparison
Comparing an int to a size, which is unsigned, causes the int to become unsigned, giving the wrong result. kinect_read returns the result of usb_control_msg, which can return a negtive error code. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ int x; expression e,e1; identifier f; @@ *x = f(...); ... when != x = e1 when != if (x < 0 || ...) { ... return ...; } *x < sizeof(e) // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/usb/gspca')
-rw-r--r--drivers/media/usb/gspca/kinect.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/usb/gspca/kinect.c b/drivers/media/usb/gspca/kinect.c
index 0cfdf8a1e19d..f993f6280c56 100644
--- a/drivers/media/usb/gspca/kinect.c
+++ b/drivers/media/usb/gspca/kinect.c
@@ -163,7 +163,7 @@ static int send_cmd(struct gspca_dev *gspca_dev, uint16_t cmd, void *cmdbuf,
actual_len = kinect_read(udev, ibuf, 0x200);
} while (actual_len == 0);
gspca_dbg(gspca_dev, D_USBO, "Control reply: %d\n", actual_len);
- if (actual_len < sizeof(*rhdr)) {
+ if (actual_len < (int)sizeof(*rhdr)) {
pr_err("send_cmd: Input control transfer failed (%d)\n",
actual_len);
return actual_len < 0 ? actual_len : -EREMOTEIO;