On Tue, Jul 18, 2017 at 08:42:51AM +0200, Martin Pieuchot wrote: > `so_state' and `so_rcv' need to be checked atomically, so extend the > scope of the lock. > > ok?
OK bluhm@ > > Index: kern/sys_socket.c > =================================================================== > RCS file: /cvs/src/sys/kern/sys_socket.c,v > retrieving revision 1.30 > diff -u -p -r1.30 sys_socket.c > --- kern/sys_socket.c 22 Feb 2017 10:20:21 -0000 1.30 > +++ kern/sys_socket.c 18 Jul 2017 06:41:10 -0000 > @@ -180,14 +180,13 @@ soo_stat(struct file *fp, struct stat *u > > memset(ub, 0, sizeof (*ub)); > ub->st_mode = S_IFSOCK; > - if ((so->so_state & SS_CANTRCVMORE) == 0 || > - so->so_rcv.sb_cc != 0) > + s = solock(so); > + if ((so->so_state & SS_CANTRCVMORE) == 0 || so->so_rcv.sb_cc != 0) > ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH; > if ((so->so_state & SS_CANTSENDMORE) == 0) > ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH; > ub->st_uid = so->so_euid; > ub->st_gid = so->so_egid; > - s = solock(so); > (void) ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, > (struct mbuf *)ub, NULL, NULL, p)); > sounlock(s);
