linux-kernel - drivers/media/dvb-core/dvb_frontend.c:154:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values.

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Message-ID: <201711271722.IU7xlxg2%fengguang.wu@intel.com>
Date:   Mon, 27 Nov 2017 17:25:29 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Mauro Carvalho Chehab <m.chehab@...sung.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org
Subject: drivers/media/dvb-core/dvb_frontend.c:154:2-7: WARNING: NULL check
 before freeing functions like kfree, debugfs_remove,
 debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider
 reorganizing relevant code to avoid passing NULL values.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323
commit: b1cb7372fa822af6c06c8045963571d13ad6348b dvb_frontend: don't use-after-free the frontend struct
date:   3 weeks ago


coccinelle warnings: (new ones prefixed by >>)

>> drivers/media/dvb-core/dvb_frontend.c:154:2-7: WARNING: NULL check before freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values.

Please review and possibly fold the followup patch.

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