https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: c02ed2e75ef4c74e41e421acb4ef1494671585e8 authored by Linus Torvalds on 26 March 2017, 21:15:16 UTC
Linux 4.11-rc4
Linux 4.11-rc4
Tip revision: c02ed2e
devm_free.cocci
/// Find uses of standard freeing functons on values allocated using devm_
/// functions. Values allocated using the devm_functions are freed when
/// the device is detached, and thus the use of the standard freeing
/// function would cause a double free.
/// See Documentation/driver-model/devres.txt for more information.
///
/// A difficulty of detecting this problem is that the standard freeing
/// function might be called from a different function than the one
/// containing the allocation function. It is thus necessary to make the
/// connection between the allocation function and the freeing function.
/// Here this is done using the specific argument text, which is prone to
/// false positives. There is no rule for the request_region and
/// request_mem_region variants because this heuristic seems to be a bit
/// less reliable in these cases.
///
// Confidence: Moderate
// Copyright: (C) 2011 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2011 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: --no-includes --include-headers
virtual org
virtual report
virtual context
@r depends on context || org || report@
expression x;
@@
(
x = devm_kmalloc(...)
|
x = devm_kvasprintf(...)
|
x = devm_kasprintf(...)
|
x = devm_kzalloc(...)
|
x = devm_kmalloc_array(...)
|
x = devm_kcalloc(...)
|
x = devm_kstrdup(...)
|
x = devm_kmemdup(...)
|
x = devm_get_free_pages(...)
|
x = devm_request_irq(...)
|
x = devm_ioremap(...)
|
x = devm_ioremap_nocache(...)
|
x = devm_ioport_map(...)
)
@pb@
expression r.x;
position p;
@@
(
* kfree@p(x)
|
* kzfree@p(x)
|
* __krealloc@p(x, ...)
|
* krealloc@p(x, ...)
|
* free_pages@p(x, ...)
|
* free_page@p(x)
|
* free_irq@p(x)
|
* iounmap@p(x)
|
* ioport_unmap@p(x)
)
@script:python depends on org@
p << pb.p;
@@
msg="WARNING: invalid free of devm_ allocated data"
coccilib.org.print_todo(p[0], msg)
@script:python depends on report@
p << pb.p;
@@
msg="WARNING: invalid free of devm_ allocated data"
coccilib.report.print_report(p[0], msg)