Let the kememdup_array() take care about multiplication and possible
overflows.
Signed-off-by: Yu Jiaoliang <yujiaoliang@xxxxxxxx>
---
net/core/filter.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/core/filter.c b/net/core/filter.c
index 45ec3dc805b1..eb946d3a9326 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -1265,8 +1265,8 @@ static struct bpf_prog *bpf_migrate_filter(struct bpf_prog *fp)
* so we need to keep the user BPF around until the 2nd
* pass. At this time, the user BPF is stored in fp->insns.
*/
- old_prog = kmemdup(fp->insns, old_len * sizeof(struct sock_filter),
- GFP_KERNEL | __GFP_NOWARN);
+ old_prog = kmemdup_array(fp->insns, old_len, sizeof(struct sock_filter),
+ GFP_KERNEL | __GFP_NOWARN);
if (!old_prog) {
err = -ENOMEM;
goto out_err;
--
2.34.1
