Currently generic_map_update_batch will reject all valid command flags for
BPF_MAP_UPDATE_ELEM other than BPF_F_LOCK, which is overkill, map updating
semantic does allow specify BPF_NOEXIST or BPF_EXIST even for batching
update.
Signed-off-by: Lin Feng <linf@xxxxxxxxxx>
---
kernel/bpf/syscall.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 869265852d51..d85361f9a9b8 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -1852,7 +1852,7 @@ int generic_map_update_batch(struct bpf_map *map, struct file *map_file,
void *key, *value;
int err = 0;
- if (attr->batch.elem_flags & ~BPF_F_LOCK)
+ if ((attr->batch.elem_flags & ~BPF_F_LOCK) > BPF_EXIST)
return -EINVAL;
if ((attr->batch.elem_flags & BPF_F_LOCK) &&