diff options
Diffstat (limited to 'sys/kern/vfs_lookup.c')
| -rw-r--r-- | sys/kern/vfs_lookup.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/kern/vfs_lookup.c b/sys/kern/vfs_lookup.c index a6e663a..4a520e9 100644 --- a/sys/kern/vfs_lookup.c +++ b/sys/kern/vfs_lookup.c @@ -45,6 +45,7 @@ __FBSDID("$FreeBSD$"); #include <sys/systm.h> #include <sys/kernel.h> #include <sys/fcntl.h> +#include <sys/jail.h> #include <sys/lock.h> #include <sys/mutex.h> #include <sys/namei.h> @@ -446,6 +447,7 @@ lookup(struct nameidata *ndp) struct vnode *dp = 0; /* the directory we are searching */ struct vnode *tdp; /* saved dp */ struct mount *mp; /* mount table entry */ + struct prison *pr; int docache; /* == 0 do not cache last component */ int wantparent; /* 1 => wantparent or lockparent flag */ int rdonly; /* lookup read-only flag bit */ @@ -603,9 +605,14 @@ dirloop: goto bad; } for (;;) { + for (pr = cnp->cn_cred->cr_prison; pr != NULL; + pr = pr->pr_parent) + if (dp == pr->pr_root) + break; if (dp == ndp->ni_rootdir || dp == ndp->ni_topdir || dp == rootvnode || + pr != NULL || ((dp->v_vflag & VV_ROOT) != 0 && (cnp->cn_flags & NOCROSSMOUNT) != 0)) { ndp->ni_dvp = dp; |
