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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 <jslaby@suse.cz>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Cc: Jeff Layton <jlayton@poochiereds.net>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Jeff Layton <jlayton@redhat.com>
zero-colors
Jiri Slaby 2017-06-13 13:35:50 +02:00 committed by Jeff Layton
parent 94073ad77f
commit 393cc3f511
3 changed files with 6 additions and 6 deletions
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7
fs/fcntl.c
View File

@ -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);

2
include/linux/fs.h
View File

@ -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);

3
net/socket.c
View File

@ -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: