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authorDenis Efremov <efremov@linux.com>2020-08-11 10:49:53 +0300
committerJulia Lawall <Julia.Lawall@lip6.fr>2020-09-12 17:08:43 +0200
commit6519a5ab1a9ffe5cf8056f688a69960bf126e723 (patch)
treec2ff0f9edc72ea2a15dccbee062ceb6b13108d2c /scripts/coccinelle/api
parent7c9dc603d55617edcc3190f9a6d7b5cf763feb57 (diff)
coccinelle: api: update kzfree script to kfree_sensitive
Commit 453431a54934 ("mm, treewide: rename kzfree() to kfree_sensitive()") renames kzfree to kfree_sensitive and uses memzero_explicit(...) instead of memset(..., 0, ...) internally. Update cocci script to reflect these changes. Signed-off-by: Denis Efremov <efremov@linux.com> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Diffstat (limited to 'scripts/coccinelle/api')
-rw-r--r--scripts/coccinelle/api/kfree_sensitive.cocci (renamed from scripts/coccinelle/api/kzfree.cocci)29
1 files changed, 13 insertions, 16 deletions
diff --git a/scripts/coccinelle/api/kzfree.cocci b/scripts/coccinelle/api/kfree_sensitive.cocci
index 33625bd7cec9..e4a066a0b77d 100644
--- a/scripts/coccinelle/api/kzfree.cocci
+++ b/scripts/coccinelle/api/kfree_sensitive.cocci
@@ -1,13 +1,13 @@
// SPDX-License-Identifier: GPL-2.0-only
///
-/// Use kzfree, kvfree_sensitive rather than memset or
-/// memzero_explicit followed by kfree
+/// Use kfree_sensitive, kvfree_sensitive rather than memset or
+/// memzero_explicit followed by kfree.
///
// Confidence: High
// Copyright: (C) 2020 Denis Efremov ISPRAS
// Options: --no-includes --include-headers
//
-// Keywords: kzfree, kvfree_sensitive
+// Keywords: kfree_sensitive, kvfree_sensitive
//
virtual context
@@ -18,7 +18,8 @@ virtual report
@initialize:python@
@@
# kmalloc_oob_in_memset uses memset to explicitly trigger out-of-bounds access
-filter = frozenset(['kmalloc_oob_in_memset', 'kzfree', 'kvfree_sensitive'])
+filter = frozenset(['kmalloc_oob_in_memset',
+ 'kfree_sensitive', 'kvfree_sensitive'])
def relevant(p):
return not (filter & {el.current_element for el in p})
@@ -56,17 +57,13 @@ type T;
- memzero_explicit@m((T)E, size);
... when != E
when strict
-// TODO: uncomment when kfree_sensitive will be merged.
-// Only this case is commented out because developers
-// may not like patches like this since kzfree uses memset
-// internally (not memzero_explicit).
-//(
-//- kfree(E)@p;
-//+ kfree_sensitive(E);
-//|
+(
+- kfree(E)@p;
++ kfree_sensitive(E);
+|
- \(vfree\|kvfree\)(E)@p;
+ kvfree_sensitive(E, size);
-//)
+)
@rp_memset depends on patch@
expression E, size;
@@ -80,7 +77,7 @@ type T;
when strict
(
- kfree(E)@p;
-+ kzfree(E);
++ kfree_sensitive(E);
|
- \(vfree\|kvfree\)(E)@p;
+ kvfree_sensitive(E, size);
@@ -91,11 +88,11 @@ p << r.p;
@@
coccilib.report.print_report(p[0],
- "WARNING: opportunity for kzfree/kvfree_sensitive")
+ "WARNING: opportunity for kfree_sensitive/kvfree_sensitive")
@script:python depends on org@
p << r.p;
@@
coccilib.org.print_todo(p[0],
- "WARNING: opportunity for kzfree/kvfree_sensitive")
+ "WARNING: opportunity for kfree_sensitive/kvfree_sensitive")