From 6dd9379e8f327e70d182b15be3ba21aa2b5d2cba Mon Sep 17 00:00:00 2001 From: Yann Droneaud Date: Mon, 23 May 2016 17:07:19 +0200 Subject: coccinelle: also catch kzfree() issues Since commit 3ef0e5ba4673 ('slab: introduce kzfree()'), kfree() is no more the only function to be considered: kzfree() should be recognized too. In particular, kzfree() must not be called on memory allocated through devm_*() functions. Cc: Johannes Weiner Acked-by: Julia Lawall Signed-off-by: Yann Droneaud Signed-off-by: Michal Marek --- scripts/coccinelle/free/devm_free.cocci | 2 ++ scripts/coccinelle/free/ifnullfree.cocci | 4 +++- scripts/coccinelle/free/kfree.cocci | 18 +++++++++++++++--- scripts/coccinelle/free/kfreeaddr.cocci | 6 +++++- 4 files changed, 25 insertions(+), 5 deletions(-) (limited to 'scripts') diff --git a/scripts/coccinelle/free/devm_free.cocci b/scripts/coccinelle/free/devm_free.cocci index 3d9349012bb3..83c03adec1c5 100644 --- a/scripts/coccinelle/free/devm_free.cocci +++ b/scripts/coccinelle/free/devm_free.cocci @@ -48,6 +48,8 @@ position p; ( * kfree@p(x) | +* kzfree@p(x) +| * free_irq@p(x) | * iounmap@p(x) diff --git a/scripts/coccinelle/free/ifnullfree.cocci b/scripts/coccinelle/free/ifnullfree.cocci index 52bd235286fa..14a4cd98e83b 100644 --- a/scripts/coccinelle/free/ifnullfree.cocci +++ b/scripts/coccinelle/free/ifnullfree.cocci @@ -19,6 +19,8 @@ expression E; - if (E != NULL) ( kfree(E); +| + kzfree(E); | debugfs_remove(E); | @@ -39,7 +41,7 @@ position p; @@ * if (E != NULL) -* \(kfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\| +* \(kfree@p\|kzfree@p\|debugfs_remove@p\|debugfs_remove_recursive@p\| * usb_free_urb@p\|kmem_cache_destroy@p\|mempool_destroy@p\| * dma_pool_destroy@p\)(E); diff --git a/scripts/coccinelle/free/kfree.cocci b/scripts/coccinelle/free/kfree.cocci index 577b78056990..ac438da4fd7b 100644 --- a/scripts/coccinelle/free/kfree.cocci +++ b/scripts/coccinelle/free/kfree.cocci @@ -20,7 +20,11 @@ expression E; position p1; @@ -kfree@p1(E) +( +* kfree@p1(E) +| +* kzfree@p1(E) +) @print expression@ constant char [] c; @@ -60,7 +64,11 @@ position ok; @@ while (1) { ... - kfree@ok(E) +( +* kfree@ok(E) +| +* kzfree@ok(E) +) ... when != break; when != goto l; when forall @@ -74,7 +82,11 @@ statement S; position free.p1!=loop.ok,p2!={print.p,sz.p}; @@ -kfree@p1(E,...) +( +* kfree@p1(E,...) +| +* kzfree@p1(E,...) +) ... ( iter(...,subE,...) S // no use diff --git a/scripts/coccinelle/free/kfreeaddr.cocci b/scripts/coccinelle/free/kfreeaddr.cocci index ce8aacc314cb..d46063b1db8b 100644 --- a/scripts/coccinelle/free/kfreeaddr.cocci +++ b/scripts/coccinelle/free/kfreeaddr.cocci @@ -16,7 +16,11 @@ identifier f; position p; @@ +( * kfree@p(&e->f) +| +* kzfree@p(&e->f) +) @script:python depends on org@ p << r.p; @@ -28,5 +32,5 @@ cocci.print_main("kfree",p) p << r.p; @@ -msg = "ERROR: kfree of structure field" +msg = "ERROR: invalid free of structure field" coccilib.report.print_report(p[0],msg) -- cgit v1.2.1