diff options
Diffstat (limited to 'net/core/sock.c')
| -rw-r--r-- | net/core/sock.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index f67a3c5b0988..1d9466a1f54e 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -148,6 +148,8 @@ #include <linux/ethtool.h> +#include <uapi/linux/pidfd.h> + #include "dev.h" static DEFINE_MUTEX(proto_list_mutex); @@ -1879,6 +1881,7 @@ int sk_getsockopt(struct sock *sk, int level, int optname, { struct pid *peer_pid; struct file *pidfd_file = NULL; + unsigned int flags = 0; int pidfd; if (len > sizeof(pidfd)) @@ -1891,7 +1894,14 @@ int sk_getsockopt(struct sock *sk, int level, int optname, if (!peer_pid) return -ENODATA; - pidfd = pidfd_prepare(peer_pid, 0, &pidfd_file); + /* The use of PIDFD_STALE requires stashing of struct pid + * on pidfs with pidfs_register_pid() and only AF_UNIX + * were prepared for this. + */ + if (sk->sk_family == AF_UNIX) + flags = PIDFD_STALE; + + pidfd = pidfd_prepare(peer_pid, flags, &pidfd_file); put_pid(peer_pid); if (pidfd < 0) return pidfd; @@ -2130,6 +2140,8 @@ lenout: */ static inline void sock_lock_init(struct sock *sk) { + sk_owner_clear(sk); + if (sk->sk_kern_sock) sock_lock_init_class_and_name( sk, @@ -2226,6 +2238,9 @@ static void sk_prot_free(struct proto *prot, struct sock *sk) cgroup_sk_free(&sk->sk_cgrp_data); mem_cgroup_sk_free(sk); security_sk_free(sk); + + sk_owner_put(sk); + if (slab != NULL) kmem_cache_free(slab, sk); else |