diff options
| author | des <des@FreeBSD.org> | 2013-09-10 10:05:59 +0000 |
|---|---|---|
| committer | des <des@FreeBSD.org> | 2013-09-10 10:05:59 +0000 |
| commit | 21e6fd796b765b83afb4869cb49eb219ade8c54d (patch) | |
| tree | 9f08d8dd919edd55c79e7cca2864adf598448f6e /sys/fs/nullfs/null_vnops.c | |
| parent | 96543c86c6fa7e82c3f4df84a1f9ad5a8a844674 (diff) | |
| download | FreeBSD-src-21e6fd796b765b83afb4869cb49eb219ade8c54d.zip FreeBSD-src-21e6fd796b765b83afb4869cb49eb219ade8c54d.tar.gz | |
Fix the length calculation for the final block of a sendfile(2)
transmission which could be tricked into rounding up to the nearest
page size, leaking up to a page of kernel memory. [13:11]
In IPv6 and NetATM, stop SIOCSIFADDR, SIOCSIFBRDADDR, SIOCSIFDSTADDR
and SIOCSIFNETMASK at the socket layer rather than pass them on to the
link layer without validation or credential checks. [SA-13:12]
Prevent cross-mount hardlinks between different nullfs mounts of the
same underlying filesystem. [SA-13:13]
Security: CVE-2013-5666
Security: FreeBSD-SA-13:11.sendfile
Security: CVE-2013-5691
Security: FreeBSD-SA-13:12.ifioctl
Security: CVE-2013-5710
Security: FreeBSD-SA-13:13.nullfs
Approved by: re
Diffstat (limited to 'sys/fs/nullfs/null_vnops.c')
| -rw-r--r-- | sys/fs/nullfs/null_vnops.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sys/fs/nullfs/null_vnops.c b/sys/fs/nullfs/null_vnops.c index 70402e3..cf3762e 100644 --- a/sys/fs/nullfs/null_vnops.c +++ b/sys/fs/nullfs/null_vnops.c @@ -858,6 +858,15 @@ null_vptocnp(struct vop_vptocnp_args *ap) return (error); } +static int +null_link(struct vop_link_args *ap) +{ + + if (ap->a_tdvp->v_mount != ap->a_vp->v_mount) + return (EXDEV); + return (null_bypass((struct vop_generic_args *)ap)); +} + /* * Global vfs data structures */ @@ -871,6 +880,7 @@ struct vop_vector null_vnodeops = { .vop_getwritemount = null_getwritemount, .vop_inactive = null_inactive, .vop_islocked = vop_stdislocked, + .vop_link = null_link, .vop_lock1 = null_lock, .vop_lookup = null_lookup, .vop_open = null_open, |
