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/2018/1/6/333Signed-off-by: Denis Efremov <[email protected]> --- scripts/coccinelle/api/memdup_user.cocci | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/scripts/coccinelle/api/memdup_user.cocci b/scripts/coccinelle/api/memdup_user.cocci index c809ab10bbce..cadcc2e87881 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 -- 2.26.2
