// SPDX-License-Identifier: GPL-2.0
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/// Make sure calls to d_find_alias() have a corresponding call to dput().
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//
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// Keywords: d_find_alias, dput
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//
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// Confidence: Moderate
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// URL: http://coccinelle.lip6.fr/
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// Options: --include-headers
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virtual context
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virtual org
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virtual patch
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virtual report
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@r exists@
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local idexpression struct dentry *dent;
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expression E, E1;
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statement S1, S2;
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position p1, p2;
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@@
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(
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if (!(dent@p1 = d_find_alias(...))) S1
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dent@p1 = d_find_alias(...)
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)
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<...when != dput(dent)
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when != if (...) { <+... dput(dent) ...+> }
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when != true !dent || ...
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when != dent = E
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when != E = dent
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if (!dent || ...) S2
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...>
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(
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return <+...dent...+>;
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return @p2 ...;
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dent@p2 = E1;
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E1 = dent;
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)
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@depends on context@
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local idexpression struct dentry *r.dent;
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position r.p1,r.p2;
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@@
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* dent@p1 = ...
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...
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(
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* return@p2 ...;
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* dent@p2
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)
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@script:python depends on org@
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p1 << r.p1;
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p2 << r.p2;
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@@
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cocci.print_main("Missing call to dput()",p1)
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cocci.print_secs("",p2)
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@depends on patch@
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local idexpression struct dentry *r.dent;
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position r.p2;
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@@
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(
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+ dput(dent);
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return @p2 ...;
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+ dput(dent);
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dent@p2 = ...;
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)
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@script:python depends on report@
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p1 << r.p1;
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p2 << r.p2;
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@@
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msg = "Missing call to dput() at line %s."
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coccilib.report.print_report(p1[0], msg % (p2[0].line))
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