From 4969f8a073977123504609d7310b42a588297aa4 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Tue, 9 Jun 2020 16:21:38 -0700 Subject: [PATCH] pidfd: Add missing sock updates for pidfd_getfd() The sock counting (sock_update_netprioidx() and sock_update_classid()) was missing from pidfd's implementation of received fd installation. Add a call to the new __receive_sock() helper. Cc: Christian Brauner Cc: Christoph Hellwig Cc: Sargun Dhillon Cc: Jakub Kicinski Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org Fixes: 8649c322f75c ("pid: Implement pidfd_getfd syscall") Signed-off-by: Kees Cook --- kernel/pid.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/kernel/pid.c b/kernel/pid.c index f1496b757162..ee58530d1aca 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -42,6 +42,7 @@ #include #include #include +#include struct pid init_struct_pid = { .count = REFCOUNT_INIT(1), @@ -642,10 +643,12 @@ static int pidfd_getfd(struct pid *pid, int fd) } ret = get_unused_fd_flags(O_CLOEXEC); - if (ret < 0) + if (ret < 0) { fput(file); - else + } else { + __receive_sock(file); fd_install(ret, file); + } return ret; }