diff options
| -rw-r--r-- | sbin/mountd/mountd.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/sbin/mountd/mountd.c b/sbin/mountd/mountd.c index ffb1b6ebb525..268b210e127c 100644 --- a/sbin/mountd/mountd.c +++ b/sbin/mountd/mountd.c @@ -1596,7 +1596,8 @@ do_mount(ep, grp, exflags, anoncrp, dirp, dirplen, fsb) int dirplen; struct statfs *fsb; { - char *cp = (char *)NULL; + struct statfs fsb1; + char *cp = NULL; u_int32_t **addrp; int done; char savedc = '\0'; @@ -1705,6 +1706,13 @@ do_mount(ep, grp, exflags, anoncrp, dirp, dirplen, fsb) } savedc = *cp; *cp = '\0'; + /* Check that we're still on the same filesystem. */ + if (statfs(dirp, &fsb1) != 0 || bcmp(&fsb1.f_fsid, + &fsb->f_fsid, sizeof(fsb1.f_fsid)) != 0) { + *cp = savedc; + syslog(LOG_ERR, "can't export %s", dirp); + return (1); + } } if (addrp) { ++addrp; |