Commit Graph

823 Commits

Author SHA1 Message Date
brooks
ac0325b4db Use an accessor function to access ifr_data.
This fixes 32-bit compat (no ioctl command defintions are required
as struct ifreq is the same size).  This is believed to be sufficent to
fully support ifconfig on 32-bit systems.

Reviewed by:	kib
Obtained from:	CheriBSD
MFC after:	1 week
Relnotes:	yes
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D14900
2018-03-30 18:50:13 +00:00
asomers
8d48e36cad audit(4): fix a typo in a comment
no functional change
2018-03-17 17:56:08 +00:00
eugen
7000d8296a mac_portacl(4): stop panicing INVARIANTS-enabled kernel by loading .ko
when kernel already has options MAC_PORTACL.

PR:		183817
Approved by:	avg (mentor)
MFC after:	1 week
2018-02-25 23:10:13 +00:00
brooks
90ef28a07c Reduce duplication in __mac_*_(file|link)(2) implementation.
Reviewed by:	rwatson
Obtained from:	CheriBSD
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D14175
2018-02-15 18:57:22 +00:00
kan
c8da6fae2c Do pass removing some write-only variables from the kernel.
This reduces noise when kernel is compiled by newer GCC versions,
such as one used by external toolchain ports.

Reviewed by: kib, andrew(sys/arm and sys/arm64), emaste(partial), erj(partial)
Reviewed by: jhb (sys/dev/pci/* sys/kern/vfs_aio.c and sys/kern/kern_synch.c)
Differential Revision: https://reviews.freebsd.org/D10385
2017-12-25 04:48:39 +00:00
pfg
4736ccfd9c sys: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:43:44 +00:00
mjg
fb0f2cc9b2 Sprinkle __read_frequently on few obvious places.
Note that some of annotated variables should probably change their types
to something smaller, preferably bit-sized.
2017-09-06 20:33:33 +00:00
emaste
074c17e1e4 Correct bitwise test in mac_bsdextended ugidfw_rule_valid()
PR:		218039
CID:		1008934
Reported by:	Coverity, PVS-Studio
Reviewed by:	kib
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D10300
2017-06-13 01:17:58 +00:00
kib
e75ba1d5c4 Commit the 64-bit inode project.
Extend the ino_t, dev_t, nlink_t types to 64-bit ints.  Modify
struct dirent layout to add d_off, increase the size of d_fileno
to 64-bits, increase the size of d_namlen to 16-bits, and change
the required alignment.  Increase struct statfs f_mntfromname[] and
f_mntonname[] array length MNAMELEN to 1024.

ABI breakage is mitigated by providing compatibility using versioned
symbols, ingenious use of the existing padding in structures, and
by employing other tricks.  Unfortunately, not everything can be
fixed, especially outside the base system.  For instance, third-party
APIs which pass struct stat around are broken in backward and
forward incompatible ways.

Kinfo sysctl MIBs ABI is changed in backward-compatible way, but
there is no general mechanism to handle other sysctl MIBS which
return structures where the layout has changed. It was considered
that the breakage is either in the management interfaces, where we
usually allow ABI slip, or is not important.

Struct xvnode changed layout, no compat shims are provided.

For struct xtty, dev_t tty device member was reduced to uint32_t.
It was decided that keeping ABI compat in this case is more useful
than reporting 64-bit dev_t, for the sake of pstat.

Update note: strictly follow the instructions in UPDATING.  Build
and install the new kernel with COMPAT_FREEBSD11 option enabled,
then reboot, and only then install new world.

Credits: The 64-bit inode project, also known as ino64, started life
many years ago as a project by Gleb Kurtsou (gleb).  Kirk McKusick
(mckusick) then picked up and updated the patch, and acted as a
flag-waver.  Feedback, suggestions, and discussions were carried
by Ed Maste (emaste), John Baldwin (jhb), Jilles Tjoelker (jilles),
and Rick Macklem (rmacklem).  Kris Moore (kris) performed an initial
ports investigation followed by an exp-run by Antoine Brodin (antoine).
Essential and all-embracing testing was done by Peter Holm (pho).
The heavy lifting of coordinating all these efforts and bringing the
project to completion were done by Konstantin Belousov (kib).

Sponsored by:	The FreeBSD Foundation (emaste, kib)
Differential revision:	https://reviews.freebsd.org/D10439
2017-05-23 09:29:05 +00:00
rwatson
88c3c9069d Break audit_bsm_klib.c into two files: one (audit_bsm_klib.c)
retaining various utility functions used during BSM generation,
and a second (audit_bsm_db.c) that contains the various in-kernel
databases supporting various audit activities (the class and
event-name tables).

(No functional change is intended.)

Obtained from:	TrustedBSD Project
MFC after:	3 weeks
Sponsored by:	DARPA, AFRL
2017-04-03 10:15:58 +00:00
rwatson
c7eb7cd2dd Correct macro names and signatures for !AUDIT versions of canonical
path auditing.

Obtained from:	TrustedBSD Project
MFC after:	3 weeks
Sponsored by:	DARPA, AFRL
2017-03-31 14:13:13 +00:00
rwatson
a374d6c3a6 Audit arguments to POSIX message queues, semaphores, and shared memory.
This requires minor changes to the audit framework to allow capturing
paths that are not filesystem paths (i.e., will not be canonicalised
relative to the process current working directory and/or filesystem
root).

Obtained from:	TrustedBSD Project
MFC after:	3 weeks
Sponsored by:	DARPA, AFRL
2017-03-31 13:43:00 +00:00
rwatson
c0efcd5fde Audit arguments to System V IPC system calls implementing sempahores,
message queues, and shared memory.

Obtained from:	TrustedBSD Project
MFC after:	3 weeks
Sponsored by:	DARPA, AFRL
2017-03-30 22:26:15 +00:00
rwatson
0bae9c75d9 Various BSM generation improvements when auditing AUE_ACCEPT,
AUE_PROCCTL, AUE_SENDFILE, AUE_ACL_*, and AUE_POSIX_FALLOCATE.
Audit AUE_SHMUNLINK path in the path token rather than as a
text string, and AUE_SHMOPEN flags as an integer token rather
than a System V IPC address token.

Obtained from:	TrustedBSD Project
MFC after:	3 weeks
Sponsored by:	DARPA, AFRL
2017-03-30 21:39:03 +00:00
rwatson
277c03b353 Don't ifdef KDTRACE_HOOKS struct, variable, and function prototype
definitions for the DTrace audit provider, so that the dtaudit module
can compile in the absence of kernel DTrace support.  This doesn't
really make run-time sense (since the binary dependencies for the
module won't be present), but it allows the dtaudit module to compile
successfully regardless of the kernel configuration.

MFC after:	3 weeks
Sponsored by:	DARPA, AFRL
Reported by:	kib
2017-03-30 12:35:56 +00:00
rwatson
67e972eb25 When handling msgsys(2), semsys(2), and shmsys(2) multiplex system calls,
map the 'which' argument into a suitable audit event identifier for the
specific operation requested.

Obtained from:	TrustedBSD Project
MFC after:	3 weeks
Sponsored by:	DARPA, AFRL
2017-03-29 23:31:35 +00:00
rwatson
67c4e33a20 Add an experimental DTrace audit provider, which allows users of DTrace to
instrument security event auditing rather than relying on conventional BSM
trail files or audit pipes:

- Add a set of per-event 'commit' probes, which provide access to
  particular auditable events at the time of commit in system-call return.
  These probes gain access to audit data via the in-kernel audit_record
  data structure, providing convenient access to system-call arguments and
  return values in a single probe.

- Add a set of per-event 'bsm' probes, which provide access to particular
  auditable events at the time of BSM record generation in the audit
  worker thread. These probes have access to the in-kernel audit_record
  data structure and BSM representation as would be written to a trail
  file or audit pipe -- i.e., asynchronously in the audit worker thread.

DTrace probe arguments consist of the name of the audit event (to support
future mechanisms of instrumenting multiple events via a single probe --
e.g., using classes), a pointer to the in-kernel audit record, and an
optional pointer to the BSM data and its length. For human convenience,
upper-case audit event names (AUE_...) are converted to lower case in
DTrace.

DTrace scripts can now cause additional audit-based data to be collected
on system calls, and inspect internal and BSM representations of the data.
They do not affect data captured in the audit trail or audit pipes
configured in the system. auditd(8) must be configured and running in
order to provide a database of event information, as well as other audit
configuration parameters (e.g., to capture command-line arguments or
environmental variables) for the provider to operate.

Reviewed by:	gnn, jonathan, markj
Sponsored by:	DARPA, AFRL
MFC after:	3 weeks
Differential Revision:	https://reviews.freebsd.org/D10149
2017-03-29 19:58:00 +00:00
rwatson
1eefe93a8f Introduce an audit event identifier -> audit event name mapping
database in the kernel audit implementation, similar the exist
class mapping database.  This will be used by the DTrace audit
provider to map audit event identifiers originating in the
system-call table back into strings for the purposes of setting
probe names.  The database is initialised and maintained by
auditd(8), which reads values in from the audit_events
configuration file, and then manages them using the A_GETEVENT
and A_SETEVENT auditon(2) operations.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, AFRL
MFC after:	3 weeks
2017-03-27 10:38:53 +00:00
rwatson
4315cc14ea Extend comment describing path canonicalisation in audit.
Sponsored by:	DARPA, AFRL
Obtained from:	TrustedBSD Project
MFC after:	3 days
2017-03-27 08:29:17 +00:00
rwatson
312591fedd Audit 'fd' and 'cmd' arguments to fcntl(2), and when generating BSM,
always audit the file-descriptor number and vnode information for all
fnctl(2) commands, not just locking-related ones.  This was likely an
oversight in the original adaptation of this code from XNU.

MFC after:	3 days
Sponsored by:	DARPA, AFRL
2016-11-22 00:41:24 +00:00
bdrewery
30f99dbeef Fix improper use of "its".
Sponsored by:	Dell EMC Isilon
2016-11-08 23:59:41 +00:00
jhb
b3eaf2f302 Don't check aq64_minfree which is unsigned for negative values.
This fixes a tautological comparison warning.

Reviewed by:	rwatson
Differential Revision:	https://reviews.freebsd.org/D7682
2016-09-08 19:47:57 +00:00
rwatson
e2edde369a Audit the accepted (or rejected) username argument to setlogin(2).
(NB: This was likely a mismerge from XNU in audit support, where the
text argument to setlogin(2) is captured -- but as a text token,
whereas this change uses the dedicated login-name field in struct
audit_record.)

MFC after:	2 weeks
Sponsored by:	DARPA, AFRL
2016-08-20 20:28:08 +00:00
rwatson
c3c54bd15a Add AUE_WAIT6 handling to the BSM conversion switch statement, reusing
the BSM encoding used for AUE_WAIT4.

MFC after:	3 days
Sponsored by:	DARPA, AFRL
2016-07-11 13:06:17 +00:00
rwatson
a898890305 Implement AUE_PREAD and AUE_PWRITE BSM conversion support, eliminating
console warnings when pread(2) and pwrite(2) are used with full
system-call auditing enabled.  We audit the same file-descriptor data
for these calls as we do read(2) and write(2).

Approved by:	re (kib)
MFC after:	3 days
Sponsored by:	DARPA, AFRL
2016-06-13 09:22:20 +00:00
pfg
9d9aae4d84 sys/security: minor spelling fixes.
No functional change.
2016-05-06 16:59:04 +00:00
pfg
42747553f4 sys: use our nitems() macro when param.h is available.
This should cover all the remaining cases in the kernel.

Discussed in:	freebsd-current
2016-04-21 19:40:10 +00:00
pfg
fc65edc1cd Remove slightly used const values that can be replaced with nitems().
Suggested by:	jhb
2016-04-21 15:38:28 +00:00
pfg
99e1acfb71 audit(8): leave unsigned comparison for last.
aq64_minfree is unsigned so comparing to find out if it is less
than zero is a nonsense. Move the comparison to the last position
as we don't want to spend time if any of the others triggers first.

hile it would be tempting to just remove it, it may be important to
keep  it for portability with platforms where may be signed(?) or
in case we may want to change it in the future.
2016-04-08 03:26:21 +00:00
kib
5c5d8c09ac Busy the mount point which is the owner of the audit vnode, around
audit_record_write().  This is important so that VFS_STATFS() is not
done on the NULL or freed mp and the check for free space is
consistent with the vnode used for write.

Add vn_start_write() braces around VOP_FSYNC() calls on the audit vnode.

Move repeated code to fsync vnode and panic to the helper
audit_worker_sync_vp().

Reviewed by:	rwatson
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2016-01-16 10:06:33 +00:00
kib
e884cfc968 Move the funsetown(9) call from audit_pipe_close() to cdevpriv
destructor.  As result, close method becomes trivial and removed.
Final cdevsw close method might be called without file
context (e.g. in vn_open_vnode() if the vnode is reclaimed meantime),
which leaves ap_sigio registered for notification, despite cdevpriv
destructor frees the memory later.

Call destructor instead of doing a cleanup inline, for
devfs_set_cdevpriv() failure in open.  This adds missed funsetown(9)
call and locks ap to satisfy audit_pipe_free() invariants.

Reported and tested by:	pho (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2016-01-13 14:02:07 +00:00
brueffer
01cacc356b Merge from contrib/openbsm to bring the kernel audit bits up to date with OpenBSM 1.2 alpha 4:
- remove $P4$
- fix a comment
2015-12-20 23:22:04 +00:00
markj
fa1b8e9a4f Fix style issues around existing SDT probes.
- Use SDT_PROBE<N>() instead of SDT_PROBE(). This has no functional effect
  at the moment, but will be needed for some future changes.
- Don't hardcode the module component of the probe identifier. This is
  set automatically by the SDT framework.

MFC after:	1 week
2015-12-16 23:39:27 +00:00
mjg
feeee4c707 fd: make 'rights' a manadatory argument to fget* functions 2015-07-05 19:05:16 +00:00
mjg
1a3e7a935e Replace struct filedesc argument in getvnode with struct thread
This is is a step towards removal of spurious arguments.
2015-06-16 13:09:18 +00:00
mjg
a5a3a94b02 fd: make rights a mandatory argument to fget_unlocked 2015-06-16 09:52:36 +00:00
mjg
054f9cab59 cred: add proc_set_cred helper
The goal here is to provide one place altering process credentials.

This eases debugging and opens up posibilities to do additional work when such
an action is performed.
2015-03-16 00:10:03 +00:00
mjg
cad4d97aa8 audit: fix cred assignment when A_SETPMASK is used
The code used to modify curproc instead of the target process.

Discussed with: rwatson
MFC after:	3 days
2015-03-15 21:43:43 +00:00
gleb
5c99f46b3b Adjust printf format specifiers for dev_t and ino_t in kernel.
ino_t and dev_t are about to become uint64_t.

Reviewed by:	kib, mckusick
2014-12-17 07:27:19 +00:00
davide
c71af9be63 Replace dev_clone with cdevpriv(9) KPI in audit_pipe code.
This is (yet another) step towards the removal of device
cloning from our kernel.

CR:	https://reviews.freebsd.org/D441
Reviewed by:	kib, rwatson
Tested by:	pho
2014-08-20 16:04:30 +00:00
hselasky
35b126e324 Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
gjb
fc21f40567 Revert r267961, r267973:
These changes prevent sysctl(8) from returning proper output,
such as:

 1) no output from sysctl(8)
 2) erroneously returning ENOMEM with tools like truss(1)
    or uname(1)
 truss: can not get etype: Cannot allocate memory
2014-06-27 22:05:21 +00:00
hselasky
bd1ed65f0f Extend the meaning of the CTLFLAG_TUN flag to automatically check if
there is an environment variable which shall initialize the SYSCTL
during early boot. This works for all SYSCTL types both statically and
dynamically created ones, except for the SYSCTL NODE type and SYSCTLs
which belong to VNETs. A new flag, CTLFLAG_NOFETCH, has been added to
be used in the case a tunable sysctl has a custom initialisation
function allowing the sysctl to still be marked as a tunable. The
kernel SYSCTL API is mostly the same, with a few exceptions for some
special operations like iterating childrens of a static/extern SYSCTL
node. This operation should probably be made into a factored out
common macro, hence some device drivers use this. The reason for
changing the SYSCTL API was the need for a SYSCTL parent OID pointer
and not only the SYSCTL parent OID list pointer in order to quickly
generate the sysctl path. The motivation behind this patch is to avoid
parameter loading cludges inside the OFED driver subsystem. Instead of
adding special code to the OFED driver subsystem to post-load tunables
into dynamically created sysctls, we generalize this in the kernel.

Other changes:
- Corrected a possibly incorrect sysctl name from "hw.cbb.intr_mask"
to "hw.pcic.intr_mask".
- Removed redundant TUNABLE statements throughout the kernel.
- Some minor code rewrites in connection to removing not needed
TUNABLE statements.
- Added a missing SYSCTL_DECL().
- Wrapped two very long lines.
- Avoid malloc()/free() inside sysctl string handling, in case it is
called to initialize a sysctl from a tunable, hence malloc()/free() is
not ready when sysctls from the sysctl dataset are registered.
- Bumped FreeBSD version to indicate SYSCTL API change.

MFC after:	2 weeks
Sponsored by:	Mellanox Technologies
2014-06-27 16:33:43 +00:00
mjg
186a13d55c audit: plug FILEDESC_LOCK leak in audit_canon_path.
MFC after:	3 days
2014-03-21 01:30:33 +00:00
rwatson
33fdc14c0c Update kernel inclusions of capability.h to use capsicum.h instead; some
further refinement is required as some device drivers intended to be
portable over FreeBSD versions rely on __FreeBSD_version to decide whether
to include capability.h.

MFC after:	3 weeks
2014-03-16 10:55:57 +00:00
glebius
80e85e32a5 Remove AppleTalk support.
AppleTalk was a network transport protocol for Apple Macintosh devices
in 80s and then 90s. Starting with Mac OS X in 2000 the AppleTalk was
a legacy protocol and primary networking protocol is TCP/IP. The last
Mac OS X release to support AppleTalk happened in 2009. The same year
routing equipment vendors (namely Cisco) end their support.

Thus, AppleTalk won't be supported in FreeBSD 11.0-RELEASE.
2014-03-14 06:29:43 +00:00
glebius
d494babace Remove IPX support.
IPX was a network transport protocol in Novell's NetWare network operating
system from late 80s and then 90s. The NetWare itself switched to TCP/IP
as default transport in 1998. Later, in this century the Novell Open
Enterprise Server became successor of Novell NetWare. The last release
that claimed to still support IPX was OES 2 in 2007. Routing equipment
vendors (e.g. Cisco) discontinued support for IPX in 2011.

Thus, IPX won't be supported in FreeBSD 11.0-RELEASE.
2014-03-14 02:58:48 +00:00
bz
96b652a34d As constantly reported during kernel compilation, m_buflen is unsigned so
can never be < 0.  Remove the expression, which can never be true.

MFC after:	1 week
2013-12-25 20:10:17 +00:00
jhb
d4261af73d There is no sysctl with the MIB { CTL_KERN, KERN_MAXID }.
MFC after:	2 weeks
2013-12-05 21:55:10 +00:00
avg
71889a5eff dtrace sdt: remove the ugly sname parameter of SDT_PROBE_DEFINE
In its stead use the Solaris / illumos approach of emulating '-' (dash)
in probe names with '__' (two consecutive underscores).

Reviewed by:	markj
MFC after:	3 weeks
2013-11-26 08:46:27 +00:00