summaryrefslogtreecommitdiff
path: root/scripts/coccinelle/null/kmerr.cocci
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2010-10-29 03:18:59 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-29 03:18:59 +0400
commite596c79050eafea89cf9fe26b7a807643a2a9904 (patch)
tree36a0c9b0d4cb149c2c5098be2257639631e5d6c6 /scripts/coccinelle/null/kmerr.cocci
parent51399a391940e676877c7a791138081f13a0bab7 (diff)
parent9231d9e02a1f92b52bbb1e4474bfd1903835a993 (diff)
downloadlinux-e596c79050eafea89cf9fe26b7a807643a2a9904.tar.xz
Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6
* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: (39 commits) Revert "namespace: add source file location exceptions" Coccinelle: Add contextual message Coccinelle: Fix documentation Coccinelle: Find doubled arguments to boolean or bit operators. Coccinelle: Find nested lock+irqsave functions that use the same flags variables. namespace: add source file location exceptions scripts/extract-ikconfig: add support for bzip2, lzma and lzo kbuild: check return value of asprintf() scripts/namespace.pl: improve to get more correct results scripts/namespace.pl: some bug fixes scripts/namespace.pl: update file exclusion list scripts/namespace.pl: fix wrong source path Coccinelle: Use the -no_show_diff option for org and report mode Coccinelle: Add a new mode named 'chain' Coccinelle: Use new comment format to explain kfree.cocci Coccinelle: Improve user information with a new kind of comment Coccinelle: Update documentation MAINTAINERS: Coccinelle: Update email address Documentation/kbuild: modules.txt cleanup Documentation/kbuild: major edit of modules.txt sections 5-8 ...
Diffstat (limited to 'scripts/coccinelle/null/kmerr.cocci')
-rw-r--r--scripts/coccinelle/null/kmerr.cocci72
1 files changed, 72 insertions, 0 deletions
diff --git a/scripts/coccinelle/null/kmerr.cocci b/scripts/coccinelle/null/kmerr.cocci
new file mode 100644
index 000000000000..949bf656c64c
--- /dev/null
+++ b/scripts/coccinelle/null/kmerr.cocci
@@ -0,0 +1,72 @@
+/// This semantic patch looks for kmalloc etc that are not followed by a
+/// NULL check. It only gives a report in the case where there is some
+/// error handling code later in the function, which may be helpful
+/// in determining what the error handling code for the call to kmalloc etc
+/// should be.
+///
+// Confidence: High
+// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
+// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
+// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
+// URL: http://coccinelle.lip6.fr/
+// Comments:
+// Options: -no_includes -include_headers
+
+virtual context
+virtual org
+virtual report
+
+@withtest@
+expression x;
+position p;
+identifier f,fld;
+@@
+
+x@p = f(...);
+... when != x->fld
+\(x == NULL \| x != NULL\)
+
+@fixed depends on context && !org && !report@
+expression x,x1;
+position p1 != withtest.p;
+statement S;
+position any withtest.p;
+identifier f;
+@@
+
+*x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
+...
+*x1@p = f(...);
+if (!x1) S
+
+// ------------------------------------------------------------------------
+
+@rfixed depends on (org || report) && !context exists@
+expression x,x1;
+position p1 != withtest.p;
+position p2;
+statement S;
+position any withtest.p;
+identifier f;
+@@
+
+x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
+...
+x1@p = f@p2(...);
+if (!x1) S
+
+@script:python depends on org@
+p1 << rfixed.p1;
+p2 << rfixed.p2;
+@@
+
+cocci.print_main("alloc call",p1)
+cocci.print_secs("possible model",p2)
+
+@script:python depends on report@
+p1 << rfixed.p1;
+p2 << rfixed.p2;
+@@
+
+msg = "alloc with no test, possible model on line %s" % (p2[0].line)
+coccilib.report.print_report(p1[0],msg)