From: Hou Tao <houtao1@xxxxxxxxxx> For global per-cpu allocator, the size of free object in free list doesn't match with unit_size and now there is no way to get the size of per-cpu pointer saved in free object, so just skip the checking. Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> Closes: https://lore.kernel.org/bpf/20230913133436.0eeec4cb@xxxxxxxxxxxxxxxx/ Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx> --- kernel/bpf/memalloc.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/kernel/bpf/memalloc.c b/kernel/bpf/memalloc.c index aad558cdc70f..0ad175277f89 100644 --- a/kernel/bpf/memalloc.c +++ b/kernel/bpf/memalloc.c @@ -491,6 +491,13 @@ static int check_obj_size(struct bpf_mem_cache *c, unsigned int idx) struct llist_node *first; unsigned int obj_size; + /* For per-cpu allocator, the size of free objects in free list doesn't + * match with unit_size and now there is no way to get the size of + * per-cpu pointer saved in free object, so just skip the checking. + */ + if (c->percpu_size) + return 0; + first = c->free_llist.first; if (!first) return 0; -- 2.29.2
