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  1. 30 Apr, 2013 3 commits
  3. 16 Apr, 2013 2 commits
  5. 12 Apr, 2013 1 commit
  7. 11 Apr, 2013 2 commits
    • Eric Paris's avatar
      Audit: do not print error when LSMs disabled · ad395abe
      Eric Paris authored 
      RHBZ: 785936

If the audit system collects a record about one process sending a signal
to another process it includes in that collection the 'secid' or 'an int
used to represet an LSM label.'  If there is no LSM enabled it will
collect a 0.  The problem is that when we attempt to print that record
we ask the LSM to convert the secid back to a string.  Since there is no
LSM it returns EOPNOTSUPP.

Most code in the audit system checks if the secid is 0 and does not
print LSM info in that case.  The signal information code however forgot
that check.  Thus users will see a message in syslog indicating that
converting the sid to string failed.  Add the right check.
Signed-off-by: default avatarEric Paris <eparis@redhat.com>
      ad395abe
    • Eric Paris's avatar
      audit: use data= not msg= for AUDIT_USER_TTY messages · f7616102
      Eric Paris authored 
      Userspace parsing libraries assume that msg= is only for userspace audit
records, not for user tty records.  Make this consistent with the other
tty records.
Reported-by: default avatarSteve Grubb <sgrubb@redhat.com>
Signed-off-by: default avatarEric Paris <eparis@redhat.com>
      f7616102
  9. 10 Apr, 2013 6 commits
  11. 08 Apr, 2013 4 commits
  13. 18 Feb, 2013 3 commits
  15. 15 Feb, 2013 9 commits
  17. 14 Feb, 2013 4 commits
    • David S. Miller's avatar
      sunvdc: Fix off-by-one in generic_request(). · f4d96054
      David S. Miller authored 
      The 'operations' bitmap corresponds one-for-one with the operation
codes, no adjustment is necessary.
Reported-by: default avatarMark Kettenis <mark.kettenis@xs4all.nl>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f4d96054
    • Tomi Valkeinen's avatar
      omapdrm: fix the dependency to omapdss · 91e83ffd
      Tomi Valkeinen authored 
      omapdrm uses "select" in Kconfig to enable omapdss. This doesn't work
correctly, as "select" forces omapdss to be enabled in the config even
if it normally could not be enabled because of missing Kconfig
dependencies.

This causes a build break on ARM, when using allyesconfig:

drivers/video/omap2/dss/dss.c: In function 'dss_calc_clock_div':
drivers/video/omap2/dss/dss.c:572:20: error: 'CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK' undeclared (first use in this function)
drivers/video/omap2/dss/dss.c:572:20: note: each undeclared identifier is reported only once for each function it appears in

Instead of using select, this patch changes omapdrm to use "depend
on".
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
      91e83ffd
    • NeilBrown's avatar
      OMAPDSS: add FEAT_DPI_USES_VDDS_DSI to omap3630_dss_feat_list · eb91e79b
      NeilBrown authored 
      commit 195e672a
   OMAPDSS: DPI: Remove cpu_is_xxxx checks

made the mistake of assuming that cpu_is_omap34xx() is exclusive of
other cpu_is_* predicates whereas it includes cpu_is_omap3630().

So on an omap3630, code that was previously enabled by
  if (cpu_is_omap34xx())
is now disabled as
  dss_has_feature(FEAT_DPI_USES_VDDS_DSI)
fails.

So add FEAT_DPI_USES_VDDS_DSI to omap3630_dss_feat_list.

Cc: Chandrabhanu Mahapatra <cmahapatra@ti.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
      eb91e79b
    • Satoru Takeuchi's avatar
      efi: Clear EFI_RUNTIME_SERVICES rather than EFI_BOOT by "noefi" boot parameter · 1de63d60
      Satoru Takeuchi authored 
      There was a serious problem in samsung-laptop that its platform driver is
designed to run under BIOS and running under EFI can cause the machine to
become bricked or can cause Machine Check Exceptions.

    Discussion about this problem:
    https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557
    https://bugzilla.kernel.org/show_bug.cgi?id=47121

    The patches to fix this problem:
    efi: Make 'efi_enabled' a function to query EFI facilities
    83e68189

    samsung-laptop: Disable on EFI hardware
    e0094244

Unfortunately this problem comes back again if users specify "noefi" option.
This parameter clears EFI_BOOT and that driver continues to run even if running
under EFI. Refer to the document, this parameter should clear
EFI_RUNTIME_SERVICES instead.

Documentation/kernel-parameters.txt:
===============================================================================
...
	noefi		[X86] Disable EFI runtime services support.
...
===============================================================================

Documentation/x86/x86_64/uefi.txt:
===============================================================================
...
- If some or all EFI runtime services don't work, you can try following
  kernel command line parameters to turn off some or all EFI runtime
  services.
	noefi		turn off all EFI runtime services
...
===============================================================================
Signed-off-by: default avatarSatoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Link: http://lkml.kernel.org/r/511C2C04.2070108@jp.fujitsu.com
Cc: Matt Fleming <matt.fleming@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
      1de63d60
  19. 13 Feb, 2013 6 commits
    • Cyril Roelandt's avatar
      xen: remove redundant NULL check before unregister_and_remove_pcpu(). · 4f8c8527
      Cyril Roelandt authored 
      unregister_and_remove_pcpu on a NULL pointer is a no-op, so the NULL check in
sync_pcpu can be removed.
Signed-off-by: default avatarCyril Roelandt <tipecaml@gmail.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      4f8c8527
    • Jan Beulich's avatar
      x86/xen: don't assume %ds is usable in xen_iret for 32-bit PVOPS. · 13d2b4d1
      Jan Beulich authored 
      This fixes CVE-2013-0228 / XSA-42

Drew Jones while working on CVE-2013-0190 found that that unprivileged guest user
in 32bit PV guest can use to crash the > guest with the panic like this:

-------------
general protection fault: 0000 [#1] SMP
last sysfs file: /sys/devices/vbd-51712/block/xvda/dev
Modules linked in: sunrpc ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4
iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6
xt_state nf_conntrack ip6table_filter ip6_tables ipv6 xen_netfront ext4
mbcache jbd2 xen_blkfront dm_mirror dm_region_hash dm_log dm_mod [last
unloaded: scsi_wait_scan]

Pid: 1250, comm: r Not tainted 2.6.32-356.el6.i686 #1
EIP: 0061:[<c0407462>] EFLAGS: 00010086 CPU: 0
EIP is at xen_iret+0x12/0x2b
EAX: eb8d0000 EBX: 00000001 ECX: 08049860 EDX: 00000010
ESI: 00000000 EDI: 003d0f00 EBP: b77f8388 ESP: eb8d1fe0
 DS: 0000 ES: 007b FS: 0000 GS: 00e0 SS: 0069
Process r (pid: 1250, ti=eb8d0000 task=c2953550 task.ti=eb8d0000)
Stack:
 00000000 0027f416 00000073 00000206 b77f8364 0000007b 00000000 00000000
Call Trace:
Code: c3 8b 44 24 18 81 4c 24 38 00 02 00 00 8d 64 24 30 e9 03 00 00 00
8d 76 00 f7 44 24 08 00 00 02 80 75 33 50 b8 00 e0 ff ff 21 e0 <8b> 40
10 8b 04 85 a0 f6 ab c0 8b 80 0c b0 b3 c0 f6 44 24 0d 02
EIP: [<c0407462>] xen_iret+0x12/0x2b SS:ESP 0069:eb8d1fe0
general protection fault: 0000 [#2]
---[ end trace ab0d29a492dcd330 ]---
Kernel panic - not syncing: Fatal exception
Pid: 1250, comm: r Tainted: G      D    ---------------
2.6.32-356.el6.i686 #1
Call Trace:
 [<c08476df>] ? panic+0x6e/0x122
 [<c084b63c>] ? oops_end+0xbc/0xd0
 [<c084b260>] ? do_general_protection+0x0/0x210
 [<c084a9b7>] ? error_code+0x73/
-------------

Petr says: "
 I've analysed the bug and I think that xen_iret() cannot cope with
 mangled DS, in this case zeroed out (null selector/descriptor) by either
 xen_failsafe_callback() or RESTORE_REGS because the corresponding LDT
 entry was invalidated by the reproducer. "

Jan took a look at the preliminary patch and came up a fix that solves
this problem:

"This code gets called after all registers other than those handled by
IRET got already restored, hence a null selector in %ds or a non-null
one that got loaded from a code or read-only data descriptor would
cause a kernel mode fault (with the potential of crashing the kernel
as a whole, if panic_on_oops is set)."

The way to fix this is to realize that the we can only relay on the
registers that IRET restores. The two that are guaranteed are the
%cs and %ss as they are always fixed GDT selectors. Also they are
inaccessible from user mode - so they cannot be altered. This is
the approach taken in this patch.

Another alternative option suggested by Jan would be to relay on
the subtle realization that using the %ebp or %esp relative references uses
the %ss segment.  In which case we could switch from using %eax to %ebp and
would not need the %ss over-rides. That would also require one extra
instruction to compensate for the one place where the register is used
as scaled index. However Andrew pointed out that is too subtle and if
further work was to be done in this code-path it could escape folks attention
and lead to accidents.
Reviewed-by: default avatarPetr Matousek <pmatouse@redhat.com>
Reported-by: default avatarPetr Matousek <pmatouse@redhat.com>
Reviewed-by: default avatarAndrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: default avatarJan Beulich <jbeulich@suse.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      13d2b4d1
    • David S. Miller's avatar
      sparc64: Fix get_user_pages_fast() wrt. THP. · 89a77915
      David S. Miller authored 
      Mostly mirrors the s390 logic, as unlike x86 we don't need the
SetPageReferenced() bits.

On sparc64 we also lack a user/privileged bit in the huge PMDs.

In order to make this work for THP and non-THP builds, some header
file adjustments were necessary.  Namely, provide the PMD_HUGE_* bit
defines and the pmd_large() inline unconditionally rather than
protected by TRANSPARENT_HUGEPAGE.
Reported-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      89a77915
    • David S. Miller's avatar
      sparc64: Add missing HAVE_ARCH_TRANSPARENT_HUGEPAGE. · b9156ebb
      David S. Miller authored 
      This got missed in the cleanups done for the S390 THP
support.

CC: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b9156ebb
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 323a72d8
      Linus Torvalds authored 
      Pull networking fixes from David Miller:
 "This is primarily to get those r8169 reverts sorted, but other fixes
  have accumulated meanwhile.

   1) Revert two r8169 changes to fix suspend/resume for some users,
      from Francois Romieu.

   2) PCI dma mapping errors in atl1c are not checked for and this cause
      hard crashes for some users, from Xiong Huang.

   3) In 3.8.x we merged the removal of the EXPERIMENTAL dependency for
      'dlm' but the same patch for 'sctp' got lost somewhere, resulting
      in the potential for build errors since there are cross
      dependencies.  From Kees Cook.

   4) SCTP's ipv6 socket route validation makes boolean tests
      incorrectly, fix from Daniel Borkmann.

   5) mac80211 does sizeof(ptr) instead of (sizeof(ptr) * nelem), from
      Cong Ding.

   6) arp_rcv() can crash on shared non-linear packets, from Eric
      Dumazet.

   7) Avoid crashes in macvtap by setting ->gso_type consistently in
      ixgbe, qlcnic, and bnx2x drivers.  From Michael S Tsirkin and
      Alexander Duyck.

   8) Trinity fuzzer spots infinite loop in __skb_recv_datagram(), fix
      from Eric Dumazet.

   9) STP protocol frames should use high packet priority, otherwise an
      overloaded bridge can get stuck.  From Stephen Hemminger.

  10) The HTB packet scheduler was converted some time ago to store
      internal timestamps in nanoseconds, but we don't convert back into
      psched ticks for the user during dumps.  Fix from Jiri Pirko.

  11) mwl8k channel table doesn't set the .band field properly,
      resulting in NULL pointer derefs.  Fix from Jonas Gorski.

  12) mac80211 doesn't accumulate channels properly during a scan so we
      can downgrade heavily to a much less desirable connection speed.
      Fix from Johannes Berg.

  13) PHY probe failure in stmmac can result in resource leaks and
      double MDIO registery later, from Giuseppe CAVALLARO.

  14) Correct ipv6 checksumming in ip6t_NPT netfilter module, also fix
      address prefix mangling, from YOSHIFUJI Hideaki."

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (27 commits)
  net, sctp: remove CONFIG_EXPERIMENTAL
  net: sctp: sctp_v6_get_dst: fix boolean test in dst cache
  batman-adv: Fix NULL pointer dereference in DAT hash collision avoidance
  net/macb: fix race with RX interrupt while doing NAPI
  atl1c: add error checking for pci_map_single functions
  htb: fix values in opt dump
  ixgbe: Only set gso_type to SKB_GSO_TCPV4 as RSC does not support IPv6
  net: fix infinite loop in __skb_recv_datagram()
  net: qmi_wwan: add Yota / Megafon M100-1 4g modem
  mwl8k: fix band for supported channels
  bridge: set priority of STP packets
  mac80211: fix channel selection bug
  arp: fix possible crash in arp_rcv()
  bnx2x: set gso_type
  qlcnic: set gso_type
  ixgbe: fix gso type
  stmmac: mdio register has to fail if the phy is not found
  stmmac: fix macro used for debugging the xmit
  Revert "r8169: enable internal ASPM and clock request settings".
  Revert "r8169: enable ALDPS for power saving".
  ...
      323a72d8
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 42976ad0
      Linus Torvalds authored 
      Pull x86 fixes from Peter Anvin:
 "One (hopefully) last batch of x86 fixes.  You asked for the patch by
  patch justifications, so here they are:

      x86, MCE: Retract most UAPI exports

   This one unexports from userspace a bunch of definitions which should
   never have been exported.  We really don't want to create an
   accidental legacy here.

      x86, doc: Add a bootloader ID for OVMF

   This is a documentation-only patch, just recording the official
   assignment of a boot loader ID.

      x86: Do not leak kernel page mapping locations

   Security: avoid making it needlessly easy for user space to probe the
   kernel memory layout.

      x86/mm: Check if PUD is large when validating a kernel address

   Prevent failures using /proc/kcore when using 1G pages.

      x86/apic: Work around boot failure on HP ProLiant DL980 G7 Server systems

   Works around a BIOS problem causing boot failures on affected hardware."

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm: Check if PUD is large when validating a kernel address
  x86/apic: Work around boot failure on HP ProLiant DL980 G7 Server systems
  x86, doc: Add a bootloader ID for OVMF
  x86: Do not leak kernel page mapping locations
  x86, MCE: Retract most UAPI exports
      42976ad0
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