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authorDenis Efremov <efremov@linux.com>2020-07-20 19:22:14 +0300
committerJulia Lawall <Julia.Lawall@lip6.fr>2020-08-04 22:46:59 +0200
commit547ade42ced037db77a82e67d70b55c0eecc49e0 (patch)
treedbb5b9a1e04f1fd042b3e10b24e98bceb0be53bf /scripts
parent7cf4be68b177855b620dbc045bf26606eed197ac (diff)
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coccinelle: api: extend memdup_user transformation with GFP_USER
Match GFP_USER and optional __GFP_NOWARN allocations with memdup_user.cocci rule. Commit 6c2c97a24f09 ("memdup_user(): switch to GFP_USER") switched memdup_user() from GFP_KERNEL to GFP_USER. In almost all cases it is still a good idea to recommend memdup_user() for GFP_KERNEL allocations. The motivation behind altering memdup_user() to GFP_USER: https://lkml.org/lkml/2018/1/6/333 Signed-off-by: Denis Efremov <efremov@linux.com> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/coccinelle/api/memdup_user.cocci8
1 files changed, 6 insertions, 2 deletions
diff --git a/scripts/coccinelle/api/memdup_user.cocci b/scripts/coccinelle/api/memdup_user.cocci
index c809ab10bbce..0e29d41ecab8 100644
--- a/scripts/coccinelle/api/memdup_user.cocci
+++ b/scripts/coccinelle/api/memdup_user.cocci
@@ -20,7 +20,9 @@ expression from,to,size;
identifier l1,l2;
@@
-- to = \(kmalloc\|kzalloc\)(size,GFP_KERNEL);
+- to = \(kmalloc\|kzalloc\)
+- (size,\(GFP_KERNEL\|GFP_USER\|
+- \(GFP_KERNEL\|GFP_USER\)|__GFP_NOWARN\));
+ to = memdup_user(from,size);
if (
- to==NULL
@@ -43,7 +45,9 @@ position p;
statement S1,S2;
@@
-* to = \(kmalloc@p\|kzalloc@p\)(size,GFP_KERNEL);
+* to = \(kmalloc@p\|kzalloc@p\)
+ (size,\(GFP_KERNEL\|GFP_USER\|
+ \(GFP_KERNEL\|GFP_USER\)|__GFP_NOWARN\));
if (to==NULL || ...) S1
if (copy_from_user(to, from, size) != 0)
S2