| Server IP : 49.231.201.246 / Your IP : 216.73.216.149 Web Server : Apache/2.4.18 (Ubuntu) System : Linux 246 4.4.0-210-generic #242-Ubuntu SMP Fri Apr 16 09:57:56 UTC 2021 x86_64 User : root ( 0) PHP Version : 7.0.33-0ubuntu0.16.04.16 Disable Function : exec,passthru,shell_exec,system,proc_open,popen,pcntl_exec MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /proc/11584/root/usr/src/linux-headers-4.4.0-210/scripts/coccinelle/free/ |
Upload File : |
/// NULL check before some freeing functions is not needed.
///
/// Based on checkpatch warning
/// "kfree(NULL) is safe this check is probably not required"
/// and kfreeaddr.cocci by Julia Lawall.
///
// Copyright: (C) 2014 Fabian Frederick. GPLv2.
// Comments: -
// Options: --no-includes --include-headers
virtual patch
virtual org
virtual report
virtual context
@r2 depends on patch@
expression E;
@@
- if (E != NULL)
(
kfree(E);
|
debugfs_remove(E);
|
debugfs_remove_recursive(E);
|
usb_free_urb(E);
|
kmem_cache_destroy(E);
|
mempool_destroy(E);
|
dma_pool_destroy(E);
)
@r depends on context || report || org @
expression E;
position p;
@@
* if (E != NULL)
* \(kfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\|
* usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\|
* dma_pool_destroy@p\)(E);
@script:python depends on org@
p << r.p;
@@
cocci.print_main("NULL check before that freeing function is not needed", p)
@script:python depends on report@
p << r.p;
@@
msg = "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."
coccilib.report.print_report(p[0], msg)