Acquire Giant in link() so that we can mark it as MSTD in

syscalls.master.  Don't want to do it in kern_link() since the
Linux emulation code calls kern_link() after performing other
actions requiring Giant.

1 files changed, 5 insertions, 1 deletions

diff --git a/sys/kern/vfs_extattr.c b/sys/kern/vfs_extattr.c
index 10ff13f..38b21e4 100644
--- a/sys/kern/vfs_extattr.c
+++ b/sys/kern/vfs_extattr.c
@@ -1338,8 +1338,12 @@ link(td, uap)
 		char *link;
 	} */ *uap;
 {
+	int error;
 
-	return (kern_link(td, uap->path, uap->link, UIO_USERSPACE));
+	mtx_lock(&Giant);
+	error = kern_link(td, uap->path, uap->link, UIO_USERSPACE);
+	mtx_unlock(&Giant);
+	return (error);
 }
 
 SYSCTL_DECL(_security_bsd);