| // 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) | |
| ( | |
| free(E); | |
| | | |
| kfree(E); | |
| | | |
| vfree(E); | |
| | | |
| vfree_recursive(E); | |
| | | |
| kmem_cache_free(E); | |
| | | |
| kmem_cache_destroy(E); | |
| | | |
| gzfree(E); | |
| ) | |
| @r depends on context || report || org @ | |
| expression E; | |
| position p; | |
| @@ | |
| * if (E != NULL) | |
| * \(free@p\|kfree@p\|vfree@p\|debugfs_remove_recursive@p\| | |
| * kmem_cache_free@p\|kmem_cache_destroy@p\|gzfree@p\)(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) |