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Server : Apache/2.4.18 (Ubuntu) System : Linux canvaswebdesign 3.13.0-71-generic #114-Ubuntu SMP Tue Dec 1 02:34:22 UTC 2015 x86_64 User : oppastar ( 1041) PHP Version : 7.0.33-0ubuntu0.16.04.15 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority, Directory : /usr/src/linux-headers-4.4.0-116-generic/scripts/coccinelle/free/ |
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/// 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);
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debugfs_remove(E);
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debugfs_remove_recursive(E);
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usb_free_urb(E);
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kmem_cache_destroy(E);
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mempool_destroy(E);
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dma_pool_destroy(E);
)
@r depends on context || report || org @
expression E;
position p;
@@
* if (E != NULL)
* \(kfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\|
* usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\|
* dma_pool_destroy@p\)(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 freeing functions like kfree, debugfs_remove, debugfs_remove_recursive or usb_free_urb is not needed. Maybe consider reorganizing relevant code to avoid passing NULL values."
coccilib.report.print_report(p[0], msg)