path: root/scripts/coccinelle/misc/cstptr.cocci
diff options
authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-30 18:14:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-30 18:14:05 -0700
commita7697b945e6e5025f184d6762e7285f1c498411d (patch)
tree3cf6ddd963c454cbadc581c8160e560894fdb2a1 /scripts/coccinelle/misc/cstptr.cocci
parentMerge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild (diff)
parentscripts/patch-kernel: digest kernel.org hosted .xz patches (diff)
Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull non-critical part of kbuild from Michal Marek: - New semantic patches, make coccicheck M= fix - make gtags speedup - make tags/TAGS always removes struct forward declarations - make deb-pkg fixes (some patches are still pending, I know) - scripts/patch-kernel fix from the last user of this script ;) * 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: scripts/patch-kernel: digest kernel.org hosted .xz patches scripts/coccinelle/api/ptr_ret.cocci: semantic patch for ptr_err scripts: refactor remove structure forward declarations kbuild: incremental tags update for GNU Global coccinelle: semantic patch for bool issues coccinelle: semantic patch to check for PTR_ERR after reassignment coccinelle: semantic patch converting 0 test to null test coccinelle: semantic patch for missing iounmap coccinelle: semantic patch for missing clk_put kbuild: Fix out-of-tree build for 'make deb-pkg' kbuild: Only build linux-image package for UML kbuild: Fix link to headers in 'make deb-pkg' coccicheck: change handling of C={1,2} when M= is set
Diffstat (limited to 'scripts/coccinelle/misc/cstptr.cocci')
1 files changed, 41 insertions, 0 deletions
diff --git a/scripts/coccinelle/misc/cstptr.cocci b/scripts/coccinelle/misc/cstptr.cocci
new file mode 100644
index 000000000000..d42564484528
--- /dev/null
+++ b/scripts/coccinelle/misc/cstptr.cocci
@@ -0,0 +1,41 @@
+/// PTR_ERR should be applied before its argument is reassigned, typically
+/// to NULL
+// Confidence: High
+// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. GPLv2.
+// Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. GPLv2.
+// URL: http://coccinelle.lip6.fr/
+// Comments:
+// Options: -no_includes -include_headers
+virtual org
+virtual report
+virtual context
+@r exists@
+expression e,e1;
+constant c;
+position p1,p2;
+*e@p1 = c
+... when != e = e1
+ when != &e
+ when != true IS_ERR(e)
+@script:python depends on org@
+p1 << r.p1;
+p2 << r.p2;
+@script:python depends on report@
+p1 << r.p1;
+p2 << r.p2;
+msg = "ERROR: PTR_ERR applied after initialization to constant on line %s" % (p1[0].line)