| /// 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); | |
| | | |
| kzfree(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) | |
| * \(kfree@p\|kzfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\| | |
| * usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\| | |
| * dma_pool_destroy@p\)(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) |