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: 05d3ef8bba77c1b5f98d941d8b2d4aeab8118ef1 authored by Linus Torvalds on 22 October 2023, 22:11:21 UTC
Linux 6.6-rc7
Linux 6.6-rc7
Tip revision: 05d3ef8
itnull.cocci
// SPDX-License-Identifier: GPL-2.0-only
/// Many iterators have the property that the first argument is always bound
/// to a real list element, never NULL.
//# False positives arise for some iterators that do not have this property,
//# or in cases when the loop cursor is reassigned. The latter should only
//# happen when the matched code is on the way to a loop exit (break, goto,
//# or return).
///
// Confidence: Moderate
// Copyright: (C) 2010-2012 Nicolas Palix.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6.
// URL: https://coccinelle.gitlabpages.inria.fr/website
// Comments:
// Options: --no-includes --include-headers
virtual patch
virtual context
virtual org
virtual report
@depends on patch@
iterator I;
expression x,E,E1,E2;
statement S,S1,S2;
@@
I(x,...) { <...
(
- if (x == NULL && ...) S
|
- if (x != NULL || ...)
S
|
- (x == NULL) ||
E
|
- (x != NULL) &&
E
|
- (x == NULL && ...) ? E1 :
E2
|
- (x != NULL || ...) ?
E1
- : E2
|
- if (x == NULL && ...) S1 else
S2
|
- if (x != NULL || ...)
S1
- else S2
|
+ BAD(
x == NULL
+ )
|
+ BAD(
x != NULL
+ )
)
...> }
@r depends on !patch exists@
iterator I;
expression x,E;
position p1,p2;
@@
*I@p1(x,...)
{ ... when != x = E
(
* x@p2 == NULL
|
* x@p2 != NULL
)
... when any
}
@script:python depends on org@
p1 << r.p1;
p2 << r.p2;
@@
cocci.print_main("iterator-bound variable",p1)
cocci.print_secs("useless NULL test",p2)
@script:python depends on report@
p1 << r.p1;
p2 << r.p2;
@@
msg = "ERROR: iterator variable bound on line %s cannot be NULL" % (p1[0].line)
coccilib.report.print_report(p2[0], msg)