archives/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-03-08 01:04:41 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

lib/group_cpus: handle const qualifier from clusters allocation type

Browse source 
In preparation for making the kmalloc family of allocators type aware, we
need to make sure that the returned type from the allocation matches the
type of the variable being assigned.  (Before, the allocator would always
return "void *", which can be implicitly cast to any pointer type.)

The assigned type is "const struct cpumask **", but the returned type,
while matching, is not const qualified.  To get them exactly matching,
just use the dereferenced pointer for the sizeof().

Link: https://lkml.kernel.org/r/20260206222010.work.349-kees@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
Cc: Wangyang Guo <wangyang.guo@intel.com>
Cc: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kees Cook 2026-02-06 14:20:13 -08:00 • committed by Andrew Morton
parent f7a553b813
commit 90627a1e08
1 changed files with 1 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
lib/group_cpus.c
View file

@ -320,7 +320,7 @@ static int alloc_cluster_groups(unsigned int ncpus,
goto no_cluster;
/* Allocate memory based on cluster number. */
clusters = kcalloc(ncluster, sizeof(struct cpumask *), GFP_KERNEL);
clusters = kcalloc(ncluster, sizeof(*clusters), GFP_KERNEL);
if (!clusters)
goto no_cluster;
cluster_groups = kcalloc(ncluster, sizeof(struct node_groups), GFP_KERNEL);