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// SPDX-License-Identifier: GPL-2.0-only
/// 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.
// 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);
|
kvfree(E);
|
kfree_sensitive(E);
|
kvfree_sensitive(E, ...);
|
vfree(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)
* \(kfree@p\|kvfree@p\|kfree_sensitive@p\|kvfree_sensitive@p\|vfree@p\|
* debugfs_remove@p\|debugfs_remove_recursive@p\|
* usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\|
* dma_pool_destroy@p\)(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 some freeing functions is not needed."
coccilib.report.print_report(p[0], msg)