bpf: Change kvfree to kfree in generic_map_lookup_batch()

buf_prevkey in generic_map_lookup_batch() is allocated with
kmalloc(). It's safe to free it with kfree().

Fixes: cb4d03ab499d ("bpf: Add generic support for lookup batch op")
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200601162814.17426-1-efremov@linux.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 9de3540..e83b081 100644 (file)
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -1399,7 +1399,7 @@ int generic_map_lookup_batch(struct bpf_map *map,
 
        buf = kmalloc(map->key_size + value_size, GFP_USER | __GFP_NOWARN);
        if (!buf) {
-               kvfree(buf_prevkey);
+               kfree(buf_prevkey);
                return -ENOMEM;
        }