[PATCH 5.4 40/48] bpf: Fix cast to pointer from integer of different size warning

[Greg Kroah-Hartman]

From: Andrii Nakryiko <andriin@xxxxxx>

commit 2dedd7d2165565bafa89718eaadfc5d1a7865f66 upstream.

Fix "warning: cast to pointer from integer of different size" when
casting u64 addr to void *.

Fixes: a23740ec43ba ("bpf: Track contents of read-only maps as scalars")
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Signed-off-by: Andrii Nakryiko <andriin@xxxxxx>
Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Acked-by: Martin KaFai Lau <kafai@xxxxxx>
Link: https://lore.kernel.org/bpf/20191011172053.2980619-1-andriin@xxxxxx
Cc: Rafael David Tinoco <rafaeldtinoco@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 kernel/bpf/verifier.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -2792,7 +2792,7 @@ static int bpf_map_direct_read(struct bp
 	err = map->ops->map_direct_value_addr(map, &addr, off);
 	if (err)
 		return err;
-	ptr = (void *)addr + off;
+	ptr = (void *)(long)addr + off;
 
 	switch (size) {
 	case sizeof(u8):