mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 02:23:16 +00:00
02da7b4277
The original version only considered the case where the then branch contains only one call to PTR_ERR. Reimplement the whole thing to allow multiple calls, with potentially different arguments. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Michal Marek <mmarek@suse.cz>
118 lines
2.1 KiB
Plaintext
118 lines
2.1 KiB
Plaintext
/// 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)
|
|
|