Commit 42e618f7 authored by Kees Cook's avatar Kees Cook Committed by Linus Torvalds

ipc/shm: remove special shm_alloc/free

There is nothing special about the shm_alloc/free routines any more, so
remove them to make code more readable.

[manfred@colorfullife.com: Rediff, to continue to keep rcu for free calls after a successful security_shm_alloc()]
Link: http://lkml.kernel.org/r/20170525185107.12869-18-manfred@colorfullife.comSigned-off-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarManfred Spraul <manfred@colorfullife.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 3d3653f9
......@@ -172,11 +172,6 @@ static inline void shm_lock_by_ptr(struct shmid_kernel *ipcp)
ipc_lock_object(&ipcp->shm_perm);
}
static void __shm_free(struct shmid_kernel *shp)
{
kvfree(shp);
}
static void shm_rcu_free(struct rcu_head *head)
{
struct kern_ipc_perm *ptr = container_of(head, struct kern_ipc_perm,
......@@ -184,7 +179,7 @@ static void shm_rcu_free(struct rcu_head *head)
struct shmid_kernel *shp = container_of(ptr, struct shmid_kernel,
shm_perm);
security_shm_free(shp);
__shm_free(shp);
kvfree(shp);
}
static inline void shm_rmid(struct ipc_namespace *ns, struct shmid_kernel *s)
......@@ -518,17 +513,6 @@ static const struct vm_operations_struct shm_vm_ops = {
#endif
};
static struct shmid_kernel *shm_alloc(void)
{
struct shmid_kernel *shp;
shp = kvmalloc(sizeof(*shp), GFP_KERNEL);
if (unlikely(!shp))
return NULL;
return shp;
}
/**
* newseg - Create a new shared memory segment
* @ns: namespace
......@@ -558,8 +542,8 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
ns->shm_tot + numpages > ns->shm_ctlall)
return -ENOSPC;
shp = shm_alloc();
if (!shp)
shp = kvmalloc(sizeof(*shp), GFP_KERNEL);
if (unlikely(!shp))
return -ENOMEM;
shp->shm_perm.key = key;
......@@ -569,7 +553,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
shp->shm_perm.security = NULL;
error = security_shm_alloc(shp);
if (error) {
__shm_free(shp);
kvfree(shp);
return error;
}
......
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