fs/compat_ioctl.c: fix an underflow issue (harmless)
We cap "nmsgs" at I2C_RDRW_IOCTL_MAX_MSGS (42) but the current code
allows negative values. It's harmless but it makes my static checker
upset so I've made nsmgs unsigned.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index dc52e13..3881610 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -680,7 +680,8 @@
struct i2c_msg __user *tmsgs;
struct i2c_msg32 __user *umsgs;
compat_caddr_t datap;
- int nmsgs, i;
+ u32 nmsgs;
+ int i;
if (get_user(nmsgs, &udata->nmsgs))
return -EFAULT;