Change the current working directory to be inside the jail created byreleng/7.2

the jail(8) command. [10:04]

Fix a one-NUL-byte buffer overflow in libopie. [10:05]

Correctly sanity-check a buffer length in nfs mount. [10:06]

Approved by:	so (cperciva)
Approved by:	re (kensmith)
Security:	FreeBSD-SA-10:04.jail
Security:	FreeBSD-SA-10:05.opie
Security:	FreeBSD-SA-10:06.nfsclient

1 files changed, 8 insertions, 1 deletions

diff --git a/lib/libc/sys/mount.2 b/lib/libc/sys/mount.2
index 6ce2d4d2fa74..3d48f4110fce 100644
--- a/lib/libc/sys/mount.2
+++ b/lib/libc/sys/mount.2
@@ -107,7 +107,7 @@ This restriction can be removed by setting the
 .Va vfs.usermount
 .Xr sysctl 8
 variable
-to a non-zero value.
+to a non-zero value; see the BUGS section for more information.
 .Pp
 The following
 .Fa flags
@@ -370,3 +370,10 @@ functions appeared in
 .At v6 .
 .Sh BUGS
 Some of the error codes need translation to more obvious messages.
+.Pp
+Allowing untrusted users to mount arbitrary media, e.g. by enabling
+.Va vfs.usermount ,
+should not be considered safe.
+Most file systems in
+.Fx
+were not built to safeguard against malicious devices.