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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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119 lines
2.1 KiB
Plaintext
119 lines
2.1 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0-only
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/// PTR_ERR should access the value just tested by IS_ERR
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//# There can be false positives in the patch case, where it is the call to
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//# IS_ERR that is wrong.
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///
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// Confidence: High
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// Copyright: (C) 2012, 2015 Julia Lawall, INRIA.
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// Copyright: (C) 2012, 2015 Gilles Muller, INRIA.
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// URL: https://coccinelle.gitlabpages.inria.fr/website
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// Options: --no-includes --include-headers
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virtual patch
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virtual context
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virtual org
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virtual report
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@ok1 exists@
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expression x,e;
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position p;
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@@
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if (IS_ERR(x=e) || ...) {
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<...
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PTR_ERR@p(x)
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...>
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}
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@ok2 exists@
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expression x,e1,e2;
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position p;
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@@
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if (IS_ERR(x) || ...) {
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<...
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(
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PTR_ERR@p(\(e1 ? e2 : x\|e1 ? x : e2\))
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PTR_ERR@p(x)
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)
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...>
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}
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@r1 depends on patch && !context && !org && !report exists@
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expression x,y;
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position p != {ok1.p,ok2.p};
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@@
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if (IS_ERR(x) || ...) {
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... when any
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when != IS_ERR(...)
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(
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PTR_ERR(x)
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PTR_ERR@p(
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- y
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+ x
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)
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)
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... when any
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}
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// ----------------------------------------------------------------------------
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@r1_context depends on !patch && (context || org || report) exists@
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position p != {ok1.p,ok2.p};
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expression x, y;
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position j0, j1;
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@@
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if (IS_ERR@j0(x) || ...) {
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... when any
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when != IS_ERR(...)
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(
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PTR_ERR(x)
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PTR_ERR@j1@p(
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y
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)
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)
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... when any
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}
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@r1_disj depends on !patch && (context || org || report) exists@
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position p != {ok1.p,ok2.p};
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expression x, y;
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position r1_context.j0, r1_context.j1;
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@@
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* if (IS_ERR@j0(x) || ...) {
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... when any
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when != IS_ERR(...)
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* PTR_ERR@j1@p(
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y
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)
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... when any
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}
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// ----------------------------------------------------------------------------
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@script:python r1_org depends on org@
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j0 << r1_context.j0;
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j1 << r1_context.j1;
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@@
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msg = "inconsistent IS_ERR and PTR_ERR"
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coccilib.org.print_todo(j0[0], msg)
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coccilib.org.print_link(j1[0], "")
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// ----------------------------------------------------------------------------
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@script:python r1_report depends on report@
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j0 << r1_context.j0;
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j1 << r1_context.j1;
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@@
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msg = "inconsistent IS_ERR and PTR_ERR on line %s." % (j1[0].line)
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coccilib.report.print_report(j0[0], msg)
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