From bf478dcffbc3c568fb3a3c8e8b93b3e7b66f4228 Mon Sep 17 00:00:00 2001 From: Yu Watanabe Date: Thu, 17 Apr 2025 04:47:49 +0900 Subject: [PATCH] sd-netlink: prepare buffer for dropping unexpected message Follow-up for c7460cce79fd358f2745bd390bd2e7ded450ee62 (v219). Fixes #35654. --- src/libsystemd/sd-netlink/netlink-socket.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/libsystemd/sd-netlink/netlink-socket.c b/src/libsystemd/sd-netlink/netlink-socket.c index 9d2b3984c2..5959959f42 100644 --- a/src/libsystemd/sd-netlink/netlink-socket.c +++ b/src/libsystemd/sd-netlink/netlink-socket.c @@ -181,6 +181,12 @@ static int socket_recv_message(int fd, void *buf, size_t buf_size, uint32_t *ret log_debug("sd-netlink: ignoring message from PID %"PRIu32, sender.nl.nl_pid); if (peek) { + _cleanup_free_ uint8_t *b = new(uint8_t, n); + if (!b) + return -ENOMEM; + + iov = IOVEC_MAKE(b, n); + /* drop the message */ n = recvmsg_safe(fd, &msg, 0); if (n < 0)