Commit f855f4ab authored by Ziyi Guo's avatar Ziyi Guo Committed by Mike Marshall
Browse files

orangefs: add usercopy whitelist to orangefs_op_cache 



orangefs_op_cache is created with kmem_cache_create(), which provides
no usercopy whitelist. orangefs_devreq_read() copies the tag and upcall
fields directly from slab objects to userspace via copy_to_user(). With
CONFIG_HARDENED_USERCOPY enabled, this triggers usercopy_abort().

Switch to kmem_cache_create_usercopy() with a whitelist covering the
tag and upcall fields, matching the pattern already used by
orangefs_inode_cache in super.c.

Signed-off-by: default avatarZiyi Guo <n7l8m4@u.northwestern.edu>
Signed-off-by: default avatarMike Marshall <hubcap@omnibond.com>
parent dbd6a823

fs/orangefs/orangefs-cache.c

+5 −1
Original line number Diff line number Diff line
@@ -19,10 +19,14 @@ static struct kmem_cache *op_cache; 


int op_cache_initialize(void)

{

	op_cache = kmem_cache_create("orangefs_op_cache",

	op_cache = kmem_cache_create_usercopy("orangefs_op_cache",

				     sizeof(struct orangefs_kernel_op_s),

				     0,

				     0,

					 offsetof(struct orangefs_kernel_op_s, tag),

					 offsetof(struct orangefs_kernel_op_s, upcall) +

					     sizeof(struct orangefs_upcall_s) -

						 offsetof(struct orangefs_kernel_op_s, tag),

				     NULL);



	if (!op_cache) {