From: Denis Efremov <efremov@linux.com> To: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Denis Efremov <efremov@linux.com>, Joe Perches <joe@perches.com>, cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org Subject: [PATCH v2] coccinelle: api: add kzfree script Date: Thu, 4 Jun 2020 23:48:46 +0300 [thread overview] Message-ID: <20200604204846.15897-1-efremov@linux.com> (raw) In-Reply-To: <20200604140805.111613-1-efremov@linux.com> Check for memset()/memset_explicit() with 0 followed by kfree()/vfree()/kvfree(). Signed-off-by: Denis Efremov <efremov@linux.com> --- Changes in v2: - memset_explicit() added - kvfree_sensitive() added - forall added to r1 - ... between memset and kfree added Unfortunately, it doesn't work as I would expect it to in "patch" mode. I've added my comment about it in the rule. It can be safely removed from the patch if I misunderstood something. Another "strange" behaviour that I faced that r2 rule works only if I write 2 expression lines: expression *E; expression size; If I try to use a single line "expression *E, size;" then r2 matches nothing. scripts/coccinelle/api/kzfree.cocci | 65 +++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 scripts/coccinelle/api/kzfree.cocci diff --git a/scripts/coccinelle/api/kzfree.cocci b/scripts/coccinelle/api/kzfree.cocci new file mode 100644 index 000000000000..5c7e4bb13bb7 --- /dev/null +++ b/scripts/coccinelle/api/kzfree.cocci @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Use kzfree, kvfree_sensitive rather than memset or +/// memset_explicit with 0 followed by kfree +/// +// Confidence: High +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// +// Keywords: kzfree, kvfree_sensitive +// + +virtual context +virtual patch +virtual org +virtual report + + +// Ignore kzfree definition +// Ignore kasan test +@r depends on !patch && !(file in "lib/test_kasan.c") && !(file in "mm/slab_common.c") forall@ +expression *E; +position p; +@@ + +* \(memset\|memset_explicit\)(E, 0, ...); + ... when != E + when strict +* \(kfree\|vfree\|kvfree\)(E)@p; + +@r1 depends on patch && !(file in "lib/test_kasan.c") && !(file in "mm/slab_common.c")@ +expression *E; +expression size; +@@ + +- \(memset\|memset_explicit\)(E, 0, size); +/// Unfortunately, it doesn't work as in !patch mode. +/// spatch (v1.0.8) should patch 4 functions in linux 5.7 with this rule +/// and uncommented "when" lines. With only "... when != E" line 2 functions +/// are patched, none with "when strict". 3 functions patch is produced by the +/// rule with "when" lines commented out. +// ... when != E +// when strict +( +- kfree(E); ++ kzfree(E); +| +- vfree(E); ++ kvfree_sensitive(E, size); +| +- kvfree(E); ++ kvfree_sensitive(E, size); +) + +@script:python depends on report@ +p << r.p; +@@ + +coccilib.report.print_report(p[0], "WARNING opportunity for kzfree/kvfree_sensitive") + +@script:python depends on org@ +p << r.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING opportunity for kzfree/kvfree_sensitive") -- 2.26.2
WARNING: multiple messages have this Message-ID (diff)
From: Denis Efremov <efremov@linux.com> To: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Joe Perches <joe@perches.com>, cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org Subject: [Cocci] [PATCH v2] coccinelle: api: add kzfree script Date: Thu, 4 Jun 2020 23:48:46 +0300 [thread overview] Message-ID: <20200604204846.15897-1-efremov@linux.com> (raw) In-Reply-To: <20200604140805.111613-1-efremov@linux.com> Check for memset()/memset_explicit() with 0 followed by kfree()/vfree()/kvfree(). Signed-off-by: Denis Efremov <efremov@linux.com> --- Changes in v2: - memset_explicit() added - kvfree_sensitive() added - forall added to r1 - ... between memset and kfree added Unfortunately, it doesn't work as I would expect it to in "patch" mode. I've added my comment about it in the rule. It can be safely removed from the patch if I misunderstood something. Another "strange" behaviour that I faced that r2 rule works only if I write 2 expression lines: expression *E; expression size; If I try to use a single line "expression *E, size;" then r2 matches nothing. scripts/coccinelle/api/kzfree.cocci | 65 +++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 scripts/coccinelle/api/kzfree.cocci diff --git a/scripts/coccinelle/api/kzfree.cocci b/scripts/coccinelle/api/kzfree.cocci new file mode 100644 index 000000000000..5c7e4bb13bb7 --- /dev/null +++ b/scripts/coccinelle/api/kzfree.cocci @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Use kzfree, kvfree_sensitive rather than memset or +/// memset_explicit with 0 followed by kfree +/// +// Confidence: High +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// +// Keywords: kzfree, kvfree_sensitive +// + +virtual context +virtual patch +virtual org +virtual report + + +// Ignore kzfree definition +// Ignore kasan test +@r depends on !patch && !(file in "lib/test_kasan.c") && !(file in "mm/slab_common.c") forall@ +expression *E; +position p; +@@ + +* \(memset\|memset_explicit\)(E, 0, ...); + ... when != E + when strict +* \(kfree\|vfree\|kvfree\)(E)@p; + +@r1 depends on patch && !(file in "lib/test_kasan.c") && !(file in "mm/slab_common.c")@ +expression *E; +expression size; +@@ + +- \(memset\|memset_explicit\)(E, 0, size); +/// Unfortunately, it doesn't work as in !patch mode. +/// spatch (v1.0.8) should patch 4 functions in linux 5.7 with this rule +/// and uncommented "when" lines. With only "... when != E" line 2 functions +/// are patched, none with "when strict". 3 functions patch is produced by the +/// rule with "when" lines commented out. +// ... when != E +// when strict +( +- kfree(E); ++ kzfree(E); +| +- vfree(E); ++ kvfree_sensitive(E, size); +| +- kvfree(E); ++ kvfree_sensitive(E, size); +) + +@script:python depends on report@ +p << r.p; +@@ + +coccilib.report.print_report(p[0], "WARNING opportunity for kzfree/kvfree_sensitive") + +@script:python depends on org@ +p << r.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING opportunity for kzfree/kvfree_sensitive") -- 2.26.2 _______________________________________________ Cocci mailing list Cocci@systeme.lip6.fr https://systeme.lip6.fr/mailman/listinfo/cocci
next prev parent reply other threads:[~2020-06-04 20:49 UTC|newest] Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-06-04 14:08 [PATCH] coccinelle: api: add kzfree script Denis Efremov 2020-06-04 14:08 ` [Cocci] " Denis Efremov 2020-06-04 14:15 ` Julia Lawall 2020-06-04 14:15 ` [Cocci] " Julia Lawall 2020-06-04 15:39 ` Denis Efremov 2020-06-04 15:39 ` [Cocci] " Denis Efremov 2020-06-04 15:51 ` Julia Lawall 2020-06-04 15:51 ` [Cocci] " Julia Lawall 2020-06-04 17:22 ` Denis Efremov 2020-06-04 17:22 ` [Cocci] " Denis Efremov 2020-06-04 17:28 ` Julia Lawall 2020-06-04 17:28 ` [Cocci] " Julia Lawall 2020-06-04 16:27 ` Joe Perches 2020-06-04 16:27 ` [Cocci] " Joe Perches 2020-06-04 17:30 ` Denis Efremov 2020-06-04 17:30 ` [Cocci] " Denis Efremov 2020-06-04 17:36 ` Joe Perches 2020-06-04 17:36 ` [Cocci] " Joe Perches 2020-06-14 19:42 ` Denis Efremov 2020-06-14 19:42 ` [Cocci] " Denis Efremov 2020-06-14 20:01 ` Joe Perches 2020-06-14 20:01 ` [Cocci] " Joe Perches 2020-06-15 12:03 ` Dan Carpenter 2020-06-15 12:03 ` [Cocci] " Dan Carpenter 2020-06-15 13:51 ` Denis Efremov 2020-06-15 13:51 ` [Cocci] " Denis Efremov 2020-06-04 20:48 ` Denis Efremov [this message] 2020-06-04 20:48 ` [Cocci] [PATCH v2] " Denis Efremov 2020-06-04 20:57 ` Julia Lawall 2020-06-04 20:57 ` Julia Lawall 2020-06-04 21:03 ` Denis Efremov 2020-06-04 21:03 ` Denis Efremov 2020-06-04 21:25 ` Denis Efremov 2020-06-04 21:25 ` Denis Efremov 2020-06-06 8:16 ` Julia Lawall 2020-06-06 8:16 ` Julia Lawall 2020-06-14 21:54 ` [PATCH v3] " Denis Efremov 2020-06-14 21:54 ` [Cocci] " Denis Efremov 2020-06-17 20:42 ` Julia Lawall 2020-06-17 20:42 ` Julia Lawall 2020-06-17 21:42 ` Denis Efremov 2020-06-17 21:42 ` Denis Efremov 2020-07-07 21:35 ` Julia Lawall 2020-07-07 21:35 ` Julia Lawall 2020-07-17 11:57 ` [PATCH v4] " Denis Efremov 2020-07-17 11:57 ` [Cocci] " Denis Efremov 2020-07-17 20:39 ` Julia Lawall 2020-07-17 20:39 ` [Cocci] " Julia Lawall 2020-08-10 23:45 ` Eric Biggers 2020-08-10 23:45 ` [Cocci] " Eric Biggers 2020-08-11 7:12 ` Denis Efremov 2020-08-11 7:12 ` [Cocci] " Denis Efremov 2020-08-11 7:49 ` [PATCH] coccinelle: api: update kzfree script to kfree_sensitive Denis Efremov 2020-08-11 7:49 ` [Cocci] " Denis Efremov 2020-08-26 8:12 ` Denis Efremov 2020-08-26 8:12 ` [Cocci] " Denis Efremov 2020-09-12 15:08 ` Julia Lawall 2020-09-12 15:08 ` [Cocci] " Julia Lawall 2020-06-05 5:50 [PATCH v2] coccinelle: api: add kzfree script Markus Elfring 2020-06-05 6:43 Markus Elfring 2020-06-05 6:43 ` Markus Elfring
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