162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-only
262306a36Sopenharmony_ci/// NULL check before some freeing functions is not needed.
362306a36Sopenharmony_ci///
462306a36Sopenharmony_ci/// Based on checkpatch warning
562306a36Sopenharmony_ci/// "kfree(NULL) is safe this check is probably not required"
662306a36Sopenharmony_ci/// and kfreeaddr.cocci by Julia Lawall.
762306a36Sopenharmony_ci///
862306a36Sopenharmony_ci// Copyright: (C) 2014 Fabian Frederick.
962306a36Sopenharmony_ci// Comments: -
1062306a36Sopenharmony_ci// Options: --no-includes --include-headers
1162306a36Sopenharmony_ci
1262306a36Sopenharmony_civirtual patch
1362306a36Sopenharmony_civirtual org
1462306a36Sopenharmony_civirtual report
1562306a36Sopenharmony_civirtual context
1662306a36Sopenharmony_ci
1762306a36Sopenharmony_ci@r2 depends on patch@
1862306a36Sopenharmony_ciexpression E;
1962306a36Sopenharmony_ci@@
2062306a36Sopenharmony_ci- if (E != NULL)
2162306a36Sopenharmony_ci(
2262306a36Sopenharmony_ci  kfree(E);
2362306a36Sopenharmony_ci|
2462306a36Sopenharmony_ci  kvfree(E);
2562306a36Sopenharmony_ci|
2662306a36Sopenharmony_ci  kfree_sensitive(E);
2762306a36Sopenharmony_ci|
2862306a36Sopenharmony_ci  kvfree_sensitive(E, ...);
2962306a36Sopenharmony_ci|
3062306a36Sopenharmony_ci  vfree(E);
3162306a36Sopenharmony_ci|
3262306a36Sopenharmony_ci  debugfs_remove(E);
3362306a36Sopenharmony_ci|
3462306a36Sopenharmony_ci  debugfs_remove_recursive(E);
3562306a36Sopenharmony_ci|
3662306a36Sopenharmony_ci  usb_free_urb(E);
3762306a36Sopenharmony_ci|
3862306a36Sopenharmony_ci  kmem_cache_destroy(E);
3962306a36Sopenharmony_ci|
4062306a36Sopenharmony_ci  mempool_destroy(E);
4162306a36Sopenharmony_ci|
4262306a36Sopenharmony_ci  dma_pool_destroy(E);
4362306a36Sopenharmony_ci)
4462306a36Sopenharmony_ci
4562306a36Sopenharmony_ci@r depends on context || report || org @
4662306a36Sopenharmony_ciexpression E;
4762306a36Sopenharmony_ciposition p;
4862306a36Sopenharmony_ci@@
4962306a36Sopenharmony_ci
5062306a36Sopenharmony_ci* if (E != NULL)
5162306a36Sopenharmony_ci*	\(kfree@p\|kvfree@p\|kfree_sensitive@p\|kvfree_sensitive@p\|vfree@p\|
5262306a36Sopenharmony_ci*         debugfs_remove@p\|debugfs_remove_recursive@p\|
5362306a36Sopenharmony_ci*         usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\|
5462306a36Sopenharmony_ci*         dma_pool_destroy@p\)(E, ...);
5562306a36Sopenharmony_ci
5662306a36Sopenharmony_ci@script:python depends on org@
5762306a36Sopenharmony_cip << r.p;
5862306a36Sopenharmony_ci@@
5962306a36Sopenharmony_ci
6062306a36Sopenharmony_cicocci.print_main("NULL check before that freeing function is not needed", p)
6162306a36Sopenharmony_ci
6262306a36Sopenharmony_ci@script:python depends on report@
6362306a36Sopenharmony_cip << r.p;
6462306a36Sopenharmony_ci@@
6562306a36Sopenharmony_ci
6662306a36Sopenharmony_cimsg = "WARNING: NULL check before some freeing functions is not needed."
6762306a36Sopenharmony_cicoccilib.report.print_report(p[0], msg)
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