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| author | Kees Cook <kees@kernel.org> | 2026-02-20 23:49:23 -0800 |
|---|---|---|
| committer | Kees Cook <kees@kernel.org> | 2026-02-21 01:02:28 -0800 |
| commit | 69050f8d6d075dc01af7a5f2f550a8067510366f (patch) | |
| tree | bb265f94d9dfa7876c06a5d9f88673d496a15341 /ipc/sem.c | |
| parent | d39a1d7486d98668dd34aaa6732aad7977c45f5a (diff) | |
| download | lwn-69050f8d6d075dc01af7a5f2f550a8067510366f.tar.gz lwn-69050f8d6d075dc01af7a5f2f550a8067510366f.zip | |
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:
Single allocations: kmalloc(sizeof(TYPE), ...)
are replaced with: kmalloc_obj(TYPE, ...)
Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with: kmalloc_objs(TYPE, COUNT, ...)
Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...)
(where TYPE may also be *VAR)
The resulting allocations no longer return "void *", instead returning
"TYPE *".
Signed-off-by: Kees Cook <kees@kernel.org>
Diffstat (limited to 'ipc/sem.c')
| -rw-r--r-- | ipc/sem.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/ipc/sem.c b/ipc/sem.c index 0f06e4bd4673..2a19244cff22 100644 --- a/ipc/sem.c +++ b/ipc/sem.c @@ -514,7 +514,7 @@ static struct sem_array *sem_alloc(size_t nsems) if (nsems > (INT_MAX - sizeof(*sma)) / sizeof(sma->sems[0])) return NULL; - sma = kvzalloc(struct_size(sma, sems, nsems), GFP_KERNEL_ACCOUNT); + sma = kvzalloc_flex(*sma, sems, nsems, GFP_KERNEL_ACCOUNT); if (unlikely(!sma)) return NULL; @@ -1853,7 +1853,7 @@ static inline int get_undo_list(struct sem_undo_list **undo_listp) undo_list = current->sysvsem.undo_list; if (!undo_list) { - undo_list = kzalloc(sizeof(*undo_list), GFP_KERNEL_ACCOUNT); + undo_list = kzalloc_obj(*undo_list, GFP_KERNEL_ACCOUNT); if (undo_list == NULL) return -ENOMEM; spin_lock_init(&undo_list->lock); @@ -1938,7 +1938,7 @@ static struct sem_undo *find_alloc_undo(struct ipc_namespace *ns, int semid) rcu_read_unlock(); /* step 2: allocate new undo structure */ - new = kvzalloc(struct_size(new, semadj, nsems), GFP_KERNEL_ACCOUNT); + new = kvzalloc_flex(*new, semadj, nsems, GFP_KERNEL_ACCOUNT); if (!new) { ipc_rcu_putref(&sma->sem_perm, sem_rcu_free); return ERR_PTR(-ENOMEM); @@ -2234,7 +2234,7 @@ static long do_semtimedop(int semid, struct sembuf __user *tsops, return -EINVAL; if (nsops > SEMOPM_FAST) { - sops = kvmalloc_array(nsops, sizeof(*sops), GFP_KERNEL); + sops = kvmalloc_objs(*sops, nsops, GFP_KERNEL); if (sops == NULL) return -ENOMEM; } |