diff options
Diffstat (limited to 'sys/kern/kern_fork.c')
| -rw-r--r-- | sys/kern/kern_fork.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c index a0b8688..da46522 100644 --- a/sys/kern/kern_fork.c +++ b/sys/kern/kern_fork.c @@ -269,14 +269,18 @@ fork1(td, flags, procp) * Unshare file descriptors (from parent.) */ if (flags & RFFDG) { + FILEDESC_LOCK(p1->p_fd); if (p1->p_fd->fd_refcnt > 1) { struct filedesc *newfd; + newfd = fdcopy(td); + FILEDESC_UNLOCK(p1->p_fd); PROC_LOCK(p1); fdfree(td); p1->p_fd = newfd; PROC_UNLOCK(p1); - } + } else + FILEDESC_UNLOCK(p1->p_fd); } *procp = NULL; return (0); @@ -519,9 +523,11 @@ again: if (flags & RFCFDG) fd = fdinit(td); - else if (flags & RFFDG) + else if (flags & RFFDG) { + FILEDESC_LOCK(p1->p_fd); fd = fdcopy(td); - else + FILEDESC_UNLOCK(p1->p_fd); + } else fd = fdshare(p1); PROC_LOCK(p2); p2->p_fd = fd; |
