On Mon, Aug 22, 2016 at 09:19:36PM -0400, Greg KH wrote:
On Tue, Aug 23, 2016 at 08:36:58AM +0800, kbuild test robot wrote:
drivers/staging/i4l/icn/icn.c:813:11-18: WARNING opportunity for memdup_user

 Use memdup_user rather than duplicating its implementation
 This is a little bit restricted to reduce false positives

Generated by: scripts/coccinelle/api/memdup_user.cocci

CC: Sudip Mukherjee <sudipm.mukher...@gmail.com>
Signed-off-by: Fengguang Wu <fengguang...@intel.com>
---

 0 files changed

rule starting on line 17: position variables or mixed modifs interfere with 
comm_assoc isobool (
(

(
(unknown *to == NULL)
  >>> IS_ERR(rule starting on line 17:to)

|
!unknown *to
  >>> IS_ERR(rule starting on line 17:to)

)
|
(unknown *NULL == unknown *to)
  >>> IS_ERR(rule starting on line 17:to)

) || ...)

There's no patch here, did something go wrong?

Yes, the above error messages look like problems in the cocci script.
CC Julia for possible inputs.

Hi Julia, here is the context of the problem:

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git 
staging-testing
head:   f5a9a15f8fd4168e415e94f5dce367f3cef08e03
commit: ee05e5f7113ea0b0db7eff7011a534c92fec2648 [251/347] staging: i4l: icn: 
donot assign in if statement

coccinelle warnings: (new ones prefixed by >>)

drivers/staging/i4l/icn/icn.c:813:11-18: WARNING opportunity for memdup_user

Thanks,
Fengguang
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