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LIBYA CYBER ARMY
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System : Linux uta-edu.server.ly 4.18.0-513.11.1.el8_9.x86_64 #1 SMP Wed Jan 17 02:00:40 EST 2024 x86_64
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Directory :  /usr/lib/modules/4.18.0-513.11.1.el8_9.x86_64/source/scripts/coccinelle/free/

Upload File :
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Current File : //usr/lib/modules/4.18.0-513.11.1.el8_9.x86_64/source/scripts/coccinelle/free/ifnullfree.cocci
/// 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);
|
  kfree_sensitive(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)
*	\(kfree@p\|kfree_sensitive@p\|debugfs_remove@p\|debugfs_remove_recursive@p\|
*         usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\|
*         dma_pool_destroy@p\)(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)

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