The only users of ipc_alloc() were ipc_rcu_alloc() and the on-heap sem_io fall-back memory. Better to just open-code these to make things easier to read.
Signed-off-by: Kees Cook <[email protected]> [[email protected]: Rediff due to inclusion of memset() into ipc_rcu_alloc().] Signed-off-by: Manfred Spraul <[email protected]> --- ipc/sem.c | 8 +++++--- ipc/util.c | 27 +++------------------------ ipc/util.h | 6 ------ 3 files changed, 8 insertions(+), 33 deletions(-) diff --git a/ipc/sem.c b/ipc/sem.c index bdff6d9..484ccf8 100644 --- a/ipc/sem.c +++ b/ipc/sem.c @@ -1368,7 +1368,8 @@ static int semctl_main(struct ipc_namespace *ns, int semid, int semnum, } sem_unlock(sma, -1); rcu_read_unlock(); - sem_io = ipc_alloc(sizeof(ushort)*nsems); + sem_io = kvmalloc_array(nsems, sizeof(ushort), + GFP_KERNEL); if (sem_io == NULL) { ipc_rcu_putref(&sma->sem_perm, sem_rcu_free); return -ENOMEM; @@ -1402,7 +1403,8 @@ static int semctl_main(struct ipc_namespace *ns, int semid, int semnum, rcu_read_unlock(); if (nsems > SEMMSL_FAST) { - sem_io = ipc_alloc(sizeof(ushort)*nsems); + sem_io = kvmalloc_array(nsems, sizeof(ushort), + GFP_KERNEL); if (sem_io == NULL) { ipc_rcu_putref(&sma->sem_perm, sem_rcu_free); return -ENOMEM; @@ -1480,7 +1482,7 @@ static int semctl_main(struct ipc_namespace *ns, int semid, int semnum, wake_up_q(&wake_q); out_free: if (sem_io != fast_sem_io) - ipc_free(sem_io); + kvfree(sem_io); return err; } diff --git a/ipc/util.c b/ipc/util.c index 9dcc08b..dd73feb 100644 --- a/ipc/util.c +++ b/ipc/util.c @@ -395,29 +395,6 @@ void ipc_rmid(struct ipc_ids *ids, struct kern_ipc_perm *ipcp) } /** - * ipc_alloc - allocate ipc space - * @size: size desired - * - * Allocate memory from the appropriate pools and return a pointer to it. - * NULL is returned if the allocation fails - */ -void *ipc_alloc(int size) -{ - return kvmalloc(size, GFP_KERNEL); -} - -/** - * ipc_free - free ipc space - * @ptr: pointer returned by ipc_alloc - * - * Free a block created with ipc_alloc(). - */ -void ipc_free(void *ptr) -{ - kvfree(ptr); -} - -/** * ipc_rcu_alloc - allocate ipc space * @size: size desired * @@ -429,9 +406,11 @@ struct kern_ipc_perm *ipc_rcu_alloc(int size) /* * We prepend the allocation with the rcu struct */ - struct kern_ipc_perm *out = ipc_alloc(size); + struct kern_ipc_perm *out = kvmalloc(size, GFP_KERNEL); if (unlikely(!out)) return NULL; + + memset(out, 0, size); atomic_set(&out->refcount, 1); return out; } diff --git a/ipc/util.h b/ipc/util.h index 09d0f91..2578fd9 100644 --- a/ipc/util.h +++ b/ipc/util.h @@ -107,12 +107,6 @@ void ipc_rmid(struct ipc_ids *, struct kern_ipc_perm *); /* must be called with ipcp locked */ int ipcperms(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp, short flg); -/* for rare, potentially huge allocations. - * both function can sleep - */ -void *ipc_alloc(int size); -void ipc_free(void *ptr); - /* * For allocation that need to be freed by RCU. * Objects are reference counted, they start with reference count 1. -- 2.9.3
