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kernel add
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/// PTR_ERR should access the value just tested by IS_ERR
//# There can be false positives in the patch case, where it is the call to
//# IS_ERR that is wrong.
///
// Confidence: High
// Copyright: (C) 2012, 2015 Julia Lawall, INRIA. GPLv2.
// Copyright: (C) 2012, 2015 Gilles Muller, INRIA. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Options: --no-includes --include-headers
virtual patch
virtual context
virtual org
virtual report
@ok1 exists@
expression x,e;
position p;
@@
if (IS_ERR(x=e) || ...) {
<...
PTR_ERR@p(x)
...>
}
@ok2 exists@
expression x,e1,e2;
position p;
@@
if (IS_ERR(x) || ...) {
<...
(
PTR_ERR@p(\(e1 ? e2 : x\|e1 ? x : e2\))
|
PTR_ERR@p(x)
)
...>
}
@r1 depends on patch && !context && !org && !report exists@
expression x,y;
position p != {ok1.p,ok2.p};
@@
if (IS_ERR(x) || ...) {
... when any
when != IS_ERR(...)
(
PTR_ERR(x)
|
PTR_ERR@p(
- y
+ x
)
)
... when any
}
// ----------------------------------------------------------------------------
@r1_context depends on !patch && (context || org || report) exists@
position p != {ok1.p,ok2.p};
expression x, y;
position j0, j1;
@@
if (IS_ERR@j0(x) || ...) {
... when any
when != IS_ERR(...)
(
PTR_ERR(x)
|
PTR_ERR@j1@p(
y
)
)
... when any
}
@r1_disj depends on !patch && (context || org || report) exists@
position p != {ok1.p,ok2.p};
expression x, y;
position r1_context.j0, r1_context.j1;
@@
* if (IS_ERR@j0(x) || ...) {
... when any
when != IS_ERR(...)
* PTR_ERR@j1@p(
y
)
... when any
}
// ----------------------------------------------------------------------------
@script:python r1_org depends on org@
j0 << r1_context.j0;
j1 << r1_context.j1;
@@
msg = "inconsistent IS_ERR and PTR_ERR"
coccilib.org.print_todo(j0[0], msg)
coccilib.org.print_link(j1[0], "")
// ----------------------------------------------------------------------------
@script:python r1_report depends on report@
j0 << r1_context.j0;
j1 << r1_context.j1;
@@
msg = "inconsistent IS_ERR and PTR_ERR on line %s." % (j1[0].line)
coccilib.report.print_report(j0[0], msg)
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