diff mbox series

[5.16,0503/1017] libbpf: Fix memleak in libbpf_netlink_recv()

Message ID 20220405070409.229958390@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman April 5, 2022, 7:23 a.m. UTC 
From: Andrii Nakryiko <andrii@kernel.org>

[ Upstream commit 1b8c924a05934d2e758ec7da7bd217ef8ebd80ce ]

Ensure that libbpf_netlink_recv() frees dynamically allocated buffer in
all code paths.

Fixes: 9c3de619e13e ("libbpf: Use dynamically allocated buffer when receiving netlink messages")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/20220217073958.276959-1-andrii@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/lib/bpf/netlink.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/tools/lib/bpf/netlink.c b/tools/lib/bpf/netlink.c
index 69b353d55dbf..fadde7d80a51 100644
--- a/tools/lib/bpf/netlink.c
+++ b/tools/lib/bpf/netlink.c
@@ -176,7 +176,8 @@  static int libbpf_netlink_recv(int sock, __u32 nl_pid, int seq,
 				libbpf_nla_dump_errormsg(nh);
 				goto done;
 			case NLMSG_DONE:
-				return 0;
+				ret = 0;
+				goto done;
 			default:
 				break;
 			}
@@ -188,9 +189,10 @@  static int libbpf_netlink_recv(int sock, __u32 nl_pid, int seq,
 				case NL_NEXT:
 					goto start;
 				case NL_DONE:
-					return 0;
+					ret = 0;
+					goto done;
 				default:
-					return ret;
+					goto done;
 				}
 			}
 		}