From 393cc3f51135ea2520521f776ef3afdf3395c797 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 13 Jun 2017 13:35:50 +0200 Subject: [PATCH] fs/fcntl: f_setown, allow returning error Allow f_setown to return an error value. We will fail in the next patch with EINVAL for bad input to f_setown, so tile the path for the later patch. Signed-off-by: Jiri Slaby Reviewed-by: Jeff Layton Cc: Jeff Layton Cc: "J. Bruce Fields" Cc: Alexander Viro Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Jeff Layton --- fs/fcntl.c | 7 ++++--- include/linux/fs.h | 2 +- net/socket.c | 3 +-- 3 files changed, 6 insertions(+), 6 deletions(-) diff --git a/fs/fcntl.c b/fs/fcntl.c index bbf8034..313eba8 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -109,7 +109,7 @@ void __f_setown(struct file *filp, struct pid *pid, enum pid_type type, } EXPORT_SYMBOL(__f_setown); -void f_setown(struct file *filp, unsigned long arg, int force) +int f_setown(struct file *filp, unsigned long arg, int force) { enum pid_type type; struct pid *pid; @@ -123,6 +123,8 @@ void f_setown(struct file *filp, unsigned long arg, int force) pid = find_vpid(who); __f_setown(filp, pid, type, force); rcu_read_unlock(); + + return 0; } EXPORT_SYMBOL(f_setown); @@ -305,8 +307,7 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg, force_successful_syscall_return(); break; case F_SETOWN: - f_setown(filp, arg, 1); - err = 0; + err = f_setown(filp, arg, 1); break; case F_GETOWN_EX: err = f_getown_ex(filp, arg); diff --git a/include/linux/fs.h b/include/linux/fs.h index aa4affb..25ee1ff 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1249,7 +1249,7 @@ extern void fasync_free(struct fasync_struct *); extern void kill_fasync(struct fasync_struct **, int, int); extern void __f_setown(struct file *filp, struct pid *, enum pid_type, int force); -extern void f_setown(struct file *filp, unsigned long arg, int force); +extern int f_setown(struct file *filp, unsigned long arg, int force); extern void f_delown(struct file *filp); extern pid_t f_getown(struct file *filp); extern int send_sigurg(struct fown_struct *fown); diff --git a/net/socket.c b/net/socket.c index c2564eb..a30a1e32 100644 --- a/net/socket.c +++ b/net/socket.c @@ -950,8 +950,7 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) err = -EFAULT; if (get_user(pid, (int __user *)argp)) break; - f_setown(sock->file, pid, 1); - err = 0; + err = f_setown(sock->file, pid, 1); break; case FIOGETOWN: case SIOCGPGRP: -- 2.7.4