diff options
| author | Hou Tao <houtao1@huawei.com> | 2023-09-13 21:59:43 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-09-15 10:22:24 -0700 |
| commit | dca7acd84e93f2881e3f63465bbb5d89a40b5d17 (patch) | |
| tree | 8bf380533d252ace728ae6856e18c5a57b394d3b | |
| parent | 837723b22a63cfbff584655b009b9d488d0e9087 (diff) | |
bpf: Skip unit_size checking for global per-cpu allocator
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@canb.auug.org.au>
Closes: https://lore.kernel.org/bpf/20230913133436.0eeec4cb@canb.auug.org.au/
Signed-off-by: Hou Tao <houtao1@huawei.com>
Tested-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20230913135943.3137292-1-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
| -rw-r--r-- | kernel/bpf/memalloc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/bpf/memalloc.c b/kernel/bpf/memalloc.c index 1c22b90e754a..cf1941516643 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; |