Commit Graph

480827 Commits

Author SHA1 Message Date
Al Viro
41d28bca2d switch d_materialise_unique() users to d_splice_alias()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-19 13:01:20 -05:00
Al Viro
b5ae6b15bd merge d_materialise_unique() into d_splice_alias()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-19 13:01:19 -05:00
Al Viro
154e80e4c3 Merge branch 'for-gfs2' into for-next 2014-11-19 13:00:57 -05:00
Al Viro
427c77d461 d_add_ci() should just accept a hashed exact match if it finds one
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-19 13:00:10 -05:00
Al Viro
845409b49b gfs2_atomic_open(): simplify the use of finish_no_open()
In ->atomic_open(inode, dentry, file, opened) calling finish_no_open(file, NULL)
is equivalent to dget(dentry); return finish_no_open(file, dentry);

No need to open-code that...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-19 12:57:21 -05:00
Al Viro
81295ce635 gfs2_create_inode(): don't bother with d_splice_alias()
dentry is always hashed and negative, inode - non-error, non-NULL and
non-directory.  In such conditions d_splice_alias() is equivalent to
"d_instantiate(dentry, inode) and return NULL", which simplifies the
downstream code and is consistent with the "have to create a new object"
case.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-19 12:57:21 -05:00
Al Viro
986cdb862e gfs2: bugger off early if O_CREAT open finds a directory
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-19 12:57:14 -05:00
Al Viro
ca5358ef75 deal with deadlock in d_walk()
... by not hitting rename_retry for reasons other than rename having
happened.  In other words, do _not_ restart when finding that
between unlocking the child and locking the parent the former got
into __dentry_kill().  Skip the killed siblings instead...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-03 15:22:16 -05:00
Al Viro
946e51f2bf move d_rcu from overlapping d_child to overlapping d_alias
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-03 15:20:29 -05:00
Al Viro
a7400222e3 new helper: is_root_inode()
replace open-coded instances

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-31 17:48:54 -04:00
Miklos Szeredi
ac7576f4b1 vfs: make first argument of dir_context.actor typed
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-31 17:48:54 -04:00
Miklos Szeredi
9f2f7d4c8d ovl: initialize ->is_cursor
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-31 17:47:51 -04:00
David Jeffery
b2de525f09 Return short read or 0 at end of a raw device, not EIO
Author: David Jeffery <djeffery@redhat.com>
Changes to the basic direct I/O code have broken the raw driver when reading
to the end of a raw device.  Instead of returning a short read for a read that
extends partially beyond the device's end or 0 when at the end of the device,
these reads now return EIO.

The raw driver needs the same end of device handling as was added for normal
block devices.  Using blkdev_read_iter, which has the needed size checks,
prevents the EIO conditions at the end of the device.

Signed-off-by: David Jeffery <djeffery@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-31 06:33:26 -04:00
Al Viro
b0afd8e5db isofs: don't bother with ->d_op for normal case
we only need it for joliet and case-insensitive mounts

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-31 06:33:17 -04:00
Al Viro
f643ff550a isofs_cmp(): we'll never see a dentry for . or ..
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-28 18:37:40 -04:00
Miklos Szeredi
d1b72cc6d8 overlayfs: fix lockdep misannotation
In an overlay directory that shadows an empty lower directory, say
/mnt/a/empty102, do:

 	touch /mnt/a/empty102/x
 	unlink /mnt/a/empty102/x
 	rmdir /mnt/a/empty102

It's actually harmless, but needs another level of nesting between
I_MUTEX_CHILD and I_MUTEX_NORMAL.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Tested-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-28 18:32:47 -04:00
Miklos Szeredi
c2096537d4 ovl: fix check for cursor
ovl_cache_entry.name is now an array not a pointer, so it makes no sense
test for it being NULL.

Detected by coverity.

From: Miklos Szeredi <mszeredi@suse.cz>
Fixes: 68bf861107 ("overlayfs: make ovl_cache_entry->name an array instead of
+pointer")
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-28 18:31:54 -04:00
Al Viro
d45f00ae43 overlayfs: barriers for opening upper-layer directory
make sure that
	a) all stores done by opening struct file don't leak past storing
the reference in od->upperfile
	b) the lockless side has read dependency barrier

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-28 18:27:28 -04:00
Paul E. McKenney
54ef6df3f3 rcu: Provide counterpart to rcu_dereference() for non-RCU situations
Although rcu_dereference() and friends can be used in situations where
object lifetimes are being managed by something other than RCU, the
resulting sparse and lockdep-RCU noise can be annoying.  This commit
therefore supplies a lockless_dereference(), which provides the
protection for dereferences without the RCU-related debugging noise.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-28 18:25:17 -04:00
Daniel Thompson
5fecf3a1e1 staging: android: logger: Fix log corruption regression
Since commit cd678fce42 ("switch logger to ->write_iter()"), any
attempt to write to the log results in the log data being written over
its own metadata, thus rendering the log unreadable.

The problem was first detected when I ran an Android userspace on the
v3.18-rc1 kernel. However the issue can also be observed with a
non-Android userspace by using echo/cat to write to/from /dev/log_main .

This patch resolves the problem by using a temporary to track the status
of not-yet-committed writes to the log buffer.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-28 18:24:30 -04:00
Linus Torvalds
cac7f24298 Linux 3.18-rc2 2014-10-26 16:48:41 -07:00
Linus Torvalds
88e237610b ARM: SoC fixes for -rc2
Another week, another small batch of fixes.
 
 Most of these make zynq, socfpga and sunxi platforms work a bit
 better:
 
 * Due to new requirements for regulators, DWMMC on socfpga broke past 3.17.
 * SMP spinup fix for socfpga
 * A few DT fixes for zynq
 * Another option (FIXED_REGULATOR) for sunxi is needed that used to be selected
   by other options but no longer is.
 * A couple of small DT fixes for at91
 * ...and a couple for i.MX.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJUTSwQAAoJEIwa5zzehBx3D0AP/3ktsJ9ORSSDDEbpGWUPndQN
 bLGOT4DGfWWn/BOlMYN9kM2k7Gr6ttxFzqepKoeb0Dl5myUeqC4C42t8FqrI78TB
 wf8e9f2lXI+j3wve55FarTDk9JSh6PbQdavgnNCzVLJQddA//JKz9vZhL4jVYC/s
 kh8VeoLOYKeE/sdcYeBF36zNAkmy0CfaGjC01SZEcd7BjVv8qq0TvkXXSP1bjsry
 ztH+DN8OJ3gg7IKB8IntfzaxSnDQl+zxlVeOsPaU1Lvahs6wSFgRqA849Nc6KXdl
 rpAuaTH6Pa5RNEd1zqhE2+o4xZymk/BM+JU77pizq4dP0o3JnDy5tzzMMd24FuMG
 sD+JZrSCP9o58L1y9W1jhVgoxmpnRGZNO1n8FhABcnSTL50W3iAzIvlpxnOIu0/z
 SzNMdItA3dtCn/Aec7wL7eGLUlyI73khMIt4heQ0jPY+IncGJ0yvdFe2m8SZKmS2
 mDeQaChml8rjXvIdjiWIlDTagBpTkR1R1JX6aJh0lgZIF1K9qf1ZfzJ5dbLAXtZe
 xjGeoOe8hXRxR0spc1rRAJlPGJh/Fqkm0UeFLDwP0DOJISTcgz4daT/Y7zdDGRJ6
 n+1kjrmwv/M481wNifFt33sdZEB1EcUO/uNAYfUV0Wlpv5ye7x2aLsfbsnMEh+qd
 H0a6R6NZu7473ewhWxRu
 =MTvh
 -----END PGP SIGNATURE-----

Merge tag 'armsoc-for-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "Another week, another small batch of fixes.

  Most of these make zynq, socfpga and sunxi platforms work a bit
  better:

   - due to new requirements for regulators, DWMMC on socfpga broke past
     v3.17
   - SMP spinup fix for socfpga
   - a few DT fixes for zynq
   - another option (FIXED_REGULATOR) for sunxi is needed that used to
     be selected by other options but no longer is.
   - a couple of small DT fixes for at91
   - ...and a couple for i.MX"

* tag 'armsoc-for-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: dts: imx28-evk: Let i2c0 run at 100kHz
  ARM: i.MX6: Fix "emi" clock name typo
  ARM: multi_v7_defconfig: enable CONFIG_MMC_DW_ROCKCHIP
  ARM: sunxi_defconfig: enable CONFIG_REGULATOR_FIXED_VOLTAGE
  ARM: dts: socfpga: Add a 3.3V fixed regulator node
  ARM: dts: socfpga: Fix SD card detect
  ARM: dts: socfpga: rename gpio nodes
  ARM: at91/dt: sam9263: fix PLLB frequencies
  power: reset: at91-reset: fix power down register
  MAINTAINERS: add atmel ssc driver maintainer entry
  arm: socfpga: fix fetching cpu1start_addr for SMP
  ARM: zynq: DT: trivial: Fix mc node
  ARM: zynq: DT: Add cadence watchdog node
  ARM: zynq: DT: Add missing reference for memory-controller
  ARM: zynq: DT: Add missing reference for ADC
  ARM: zynq: DT: Add missing address for L2 pl310
  ARM: zynq: DT: Remove 222 MHz OPP
  ARM: zynq: DT: Fix GEM register area size
2014-10-26 11:35:51 -07:00
Linus Torvalds
d1e14f1d63 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs updates from Al Viro:
 "overlayfs merge + leak fix for d_splice_alias() failure exits"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  overlayfs: embed middle into overlay_readdir_data
  overlayfs: embed root into overlay_readdir_data
  overlayfs: make ovl_cache_entry->name an array instead of pointer
  overlayfs: don't hold ->i_mutex over opening the real directory
  fix inode leaks on d_splice_alias() failure exits
  fs: limit filesystem stacking depth
  overlay: overlay filesystem documentation
  overlayfs: implement show_options
  overlayfs: add statfs support
  overlay filesystem
  shmem: support RENAME_WHITEOUT
  ext4: support RENAME_WHITEOUT
  vfs: add RENAME_WHITEOUT
  vfs: add whiteout support
  vfs: export check_sticky()
  vfs: introduce clone_private_mount()
  vfs: export __inode_permission() to modules
  vfs: export do_splice_direct() to modules
  vfs: add i_op->dentry_open()
2014-10-26 11:19:18 -07:00
Olof Johansson
efc176a8ee The i.MX fixes for 3.18:
- Revert one patch which increases I2C bus frequency on imx28-evk
  - Fix a typo on imx6q EIM clock name
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQEcBAABAgAGBQJUTE8JAAoJEFBXWFqHsHzOGawH/0KGNaHbI3rj+Hx1HHtN056y
 3rgHSsLZSLQB89+bMd8aEVPJ2z0RKYXfyI1IvkcgEZxsqmHwRY8Fwlof4D38/bfP
 tRHnyzT2E+znnyhvUZlH9yd9foTd3VkXbxFxbEssRHl2W2OxA0+3MbskknERPZqs
 qr22DcMLKyrTbUH39iiEjS43qcJhuf/6vZmoVGCGdZonZwkH8WccIQ+kKneOn8/Z
 11U4ioB4pirqvhM1niYQ95RLG0TveBN6op3c1HWkhqY4EKOlraZHQb4EOoslSO/X
 vWoJqgB9DLH3eV+WTFI0FjGDK/6CFhgAth8q0FKVlHA3FFHr+fXdxv/+NLtagzQ=
 =elO/
 -----END PGP SIGNATURE-----

Merge tag 'imx-fixes-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into fixes

Merge "ARM: imx: fixes for 3.18" from Shawn Guo:

The i.MX fixes for 3.18:
 - Revert one patch which increases I2C bus frequency on imx28-evk
 - Fix a typo on imx6q EIM clock name

* tag 'imx-fixes-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  ARM: dts: imx28-evk: Let i2c0 run at 100kHz
  ARM: i.MX6: Fix "emi" clock name typo

Signed-off-by: Olof Johansson <olof@lixom.net>
2014-10-25 20:44:05 -07:00
Fabio Estevam
d1e61eb443 ARM: dts: imx28-evk: Let i2c0 run at 100kHz
Commit 78b81f4666 ("ARM: dts: imx28-evk: Run I2C0 at 400kHz") caused issues
when doing the following sequence in loop:

- Boot the kernel
- Perform audio playback
- Reboot the system via 'reboot' command

In many times the audio card cannot be probed, which causes playback to fail.

After restoring to the original i2c0 frequency of 100kHz there is no such
problem anymore.

This reverts commit 78b81f4666.

Cc: <stable@vger.kernel.org> # 3.16+
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
2014-10-25 20:17:36 +08:00
Steve Longerbeam
a1fc198046 ARM: i.MX6: Fix "emi" clock name typo
Fix a typo error, the "emi" names refer to the eim clocks.

The change fixes typo in EIM and EIM_SLOW pre-output dividers and
selectors clock names. Notably EIM_SLOW clock itself is named correctly.

Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
[vladimir_zapolskiy@mentor.com: ported to v3.17]
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Cc: Sascha Hauer <kernel@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
2014-10-25 20:01:09 +08:00
Al Viro
db6ec212b5 overlayfs: embed middle into overlay_readdir_data
same story...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-24 20:25:23 -04:00
Al Viro
49be4fb9cc overlayfs: embed root into overlay_readdir_data
no sense having it a pointer - all instances have it pointing to
local variable in the same stack frame

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-24 20:25:23 -04:00
Al Viro
68bf861107 overlayfs: make ovl_cache_entry->name an array instead of pointer
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-24 20:25:22 -04:00
Al Viro
3d268c9b13 overlayfs: don't hold ->i_mutex over opening the real directory
just use it to serialize the assignment

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-10-24 20:24:11 -04:00
Linus Torvalds
2cc91884b6 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS fixes from Ralf Baechle:
 "This is the first round of fixes and tying up loose ends for MIPS.

   - plenty of fixes for build errors in specific obscure configurations
   - remove redundant code on the Lantiq platform
   - removal of a useless SEAD I2C driver that was causing a build issue
   - fix an earlier TLB exeption handler fix to also work on Octeon.
   - fix ISA level dependencies in FPU emulator's instruction decoding.
   - don't hardcode kernel command line in Octeon software emulator.
   - fix an earlier fix for the Loondson 2 clock setting"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: SEAD3: Fix I2C device registration.
  MIPS: SEAD3: Nuke PIC32 I2C driver.
  MIPS: ftrace: Fix a microMIPS build problem
  MIPS: MSP71xx: Fix build error
  MIPS: Malta: Do not build the malta-amon.c file if CMP is not enabled
  MIPS: Prevent compiler warning from cop2_{save,restore}
  MIPS: Kconfig: Add missing MIPS_CPS dependencies to PM and cpuidle
  MIPS: idle: Remove leftover __pastwait symbol and its references
  MIPS: Sibyte: Include the swarm subdir to the sb1250 LittleSur builds
  MIPS: ptrace.h: Add a missing include
  MIPS: ath79: Fix compilation error when CONFIG_PCI is disabled
  MIPS: MSP71xx: Remove compilation error when CONFIG_MIPS_MT is present
  MIPS: Octeon: Remove special case for simulator command line.
  MIPS: tlbex: Properly fix HUGE TLB Refill exception handler
  MIPS: loongson2_cpufreq: Fix CPU clock rate setting mismerge
  pci: pci-lantiq: remove duplicate check on resource
  MIPS: Lasat: Add missing CONFIG_PROC_FS dependency to PICVUE_PROC
  MIPS: cp1emu: Fix ISA restrictions for cop1x_op instructions
2014-10-24 12:48:47 -07:00
Linus Torvalds
cdc63a0595 arm64 fixes:
- Enable 48-bit VA space now that KVM has been fixed, together with
   a couple of fixes for pgd allocation alignment and initial memblock
   current_limit. There is still a dependency on !ARM_SMMU which needs to
   be updated as it uses the page table manipulation macros of the host
   kernel
 - eBPF fixes following changes/conflicts during the merging window
 - Compat types affecting compat_elf_prpsinfo
 - Compilation error on UP builds
 - ASLR fix when /proc/sys/kernel/randomize_va_space == 0
 - DT definitions for CLCD support on ARMv8 model platform
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJUSowhAAoJEGvWsS0AyF7x4A8QAK/KJj3aEhRoJCFKtkrKcQer
 WydkHEVpJtk8Y+o9zIBU/J9HXDDakQlIZi3bNcWA+TQda1yr7zqEgVRZwhfaQMIu
 oXLzSLnZtiqe2HU7TaccJfFG293K+gysjTPRPixdAwWO/9hvoPOqJHnBRWKTDNzh
 8D04PTM9dcpKXvVjPcRHIxbk2oH04a/tjOBeTpi5uWaUdZLWjHt2dTjWwP/q0af4
 XsDrF5pYQaYEzCI9MczSbcQLwFPkxhS36JH+V+OhmVoCFv0PT7mm5o29DiU1N/Rt
 UsAwtBQ4oQV8seZMQaT5sVDNBqqqyfrYDAACdY0ewIr81PF7z8tdm5+G1P4JfQ0t
 iVguz3s1rJ6V0yXy0t18XHgpPFLLqpoEDEO6obYXYrhe2nTquQulgJoLaIu2qXmO
 jlL8R1rHWKRAQ7xIyLATjhUmW5dc2aK6xO+/3Xuz1+JOunNeOZW67xexpPzRU4Vh
 sw9S8sKwJmL5wH+ojqxsbg73WvTUs5dd4WoK7Tci8FZ0qfG14pyaX4s9iRhUZArQ
 4vx8lfF7FQma8nZ0ytXSY/666dAedL/bXZrmPhjVl/XYoEA4IFaW7uDIIqGbUMWr
 oNOe4QahxZu5jHI8CYncXHw51RXst+03oE5Uon30x7F3ZD71perLZe2dMTTaezKv
 2MX9/BULRrjpgkA4gW5L
 =QssH
 -----END PGP SIGNATURE-----

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:

 - enable 48-bit VA space now that KVM has been fixed, together with a
   couple of fixes for pgd allocation alignment and initial memblock
   current_limit.  There is still a dependency on !ARM_SMMU which needs
   to be updated as it uses the page table manipulation macros of the
   host kernel
 - eBPF fixes following changes/conflicts during the merging window
 - Compat types affecting compat_elf_prpsinfo
 - Compilation error on UP builds
 - ASLR fix when /proc/sys/kernel/randomize_va_space == 0
 - DT definitions for CLCD support on ARMv8 model platform

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Fix memblock current_limit with 64K pages and 48-bit VA
  arm64: ASLR: Don't randomise text when randomise_va_space == 0
  arm64: vexpress: Add CLCD support to the ARMv8 model platform
  arm64: Fix compilation error on UP builds
  Documentation/arm64/memory.txt: fix typo
  net: bpf: arm64: minor fix of type in jited
  arm64: bpf: add 'load 64-bit immediate' instruction
  arm64: bpf: add 'shift by register' instructions
  net: bpf: arm64: address randomize and write protect JIT code
  arm64: mm: Correct fixmap pagetable types
  arm64: compat: fix compat types affecting struct compat_elf_prpsinfo
  arm64: Align less than PAGE_SIZE pgds naturally
  arm64: Allow 48-bits VA space without ARM_SMMU
2014-10-24 12:48:04 -07:00
Linus Torvalds
83da00fbc0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Pull two sparc fixes from David Miller:

 1) Fix boots with gcc-4.9 compiled sparc64 kernels.

 2) Add missing __get_user_pages_fast() on sparc64 to fix hangs on
    futexes used in transparent hugepage areas.

    It's really idiotic to have a weak symbolled fallback that just
    returns zero, and causes this kind of bug.  There should be no
    backup implementation and the link should fail if the architecture
    fails to provide __get_user_pages_fast() and supports transparent
    hugepages.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Implement __get_user_pages_fast().
  sparc64: Fix register corruption in top-most kernel stack frame during boot.
2014-10-24 12:45:47 -07:00
Linus Torvalds
96971e9aa9 This is a pretty large update. I think it is roughly as big
as what I usually had for the _whole_ rc period.
 
 There are a few bad bugs where the guest can OOPS or crash the host.  We
 have also started looking at attack models for nested virtualization;
 bugs that usually result in the guest ring 0 crashing itself become
 more worrisome if you have nested virtualization, because the nested
 guest might bring down the non-nested guest as well.  For current
 uses of nested virtualization these do not really have a security
 impact, but you never know and bugs are bugs nevertheless.
 
 A lot of these bugs are in 3.17 too, resulting in a large number of
 stable@ Ccs.  I checked that all the patches apply there with no
 conflicts.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.22 (GNU/Linux)
 
 iQEcBAABAgAGBQJUSjmSAAoJEL/70l94x66D2cYH/3JKWsTzhXjHGxZcXQQ85CwR
 49hp/crCLWJ2YRKzyAOkvwPI0/SgYKM5wJ8kgtKlpLxrPZKYwhGd1S9tKf6EdAib
 5gc/SDDAgHmkqL3IrXmkyKzUVeUWvgD/IFi1Sqalko1blpRlaN/JyJV0mjjGCbA+
 yH3Qi5tD0X00u00ycuZCB6mrFH0PH87BmKFiz6bSSJ43tsgD9AVD64BZid6c6hwm
 iaIfNcIuShavlv1TKG80cSez2qtNXjRLeTN8A10gVZo3hof/wP8aRm+LxF/1JEZX
 OsoNCjOhhL29qafcZOg3j/atbiAzWtSGV3vjU+iWh5mnN5oFZHcPgIGucQsuFec=
 =9oQY
 -----END PGP SIGNATURE-----

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "This is a pretty large update.  I think it is roughly as big as what I
  usually had for the _whole_ rc period.

  There are a few bad bugs where the guest can OOPS or crash the host.
  We have also started looking at attack models for nested
  virtualization; bugs that usually result in the guest ring 0 crashing
  itself become more worrisome if you have nested virtualization,
  because the nested guest might bring down the non-nested guest as
  well.  For current uses of nested virtualization these do not really
  have a security impact, but you never know and bugs are bugs
  nevertheless.

  A lot of these bugs are in 3.17 too, resulting in a large number of
  stable@ Ccs.  I checked that all the patches apply there with no
  conflicts"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  kvm: vfio: fix unregister kvm_device_ops of vfio
  KVM: x86: Wrong assertion on paging_tmpl.h
  kvm: fix excessive pages un-pinning in kvm_iommu_map error path.
  KVM: x86: PREFETCH and HINT_NOP should have SrcMem flag
  KVM: x86: Emulator does not decode clflush well
  KVM: emulate: avoid accessing NULL ctxt->memopp
  KVM: x86: Decoding guest instructions which cross page boundary may fail
  kvm: x86: don't kill guest on unknown exit reason
  kvm: vmx: handle invvpid vm exit gracefully
  KVM: x86: Handle errors when RIP is set during far jumps
  KVM: x86: Emulator fixes for eip canonical checks on near branches
  KVM: x86: Fix wrong masking on relative jump/call
  KVM: x86: Improve thread safety in pit
  KVM: x86: Prevent host from panicking on shared MSR writes.
  KVM: x86: Check non-canonical addresses upon WRMSR
2014-10-24 12:42:55 -07:00
Linus Torvalds
20ca57cde5 xen: bug fixes for 3.18-rc1
- Fix regression in xen_clocksource_read() which caused all Xen guests
   to crash early in boot.
 - Several fixes for super rare race conditions in the p2m.
 - Assorted other minor fixes.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQEcBAABAgAGBQJUSh3nAAoJEFxbo/MsZsTRw6IH/imL2J++b8cafVvHjmVRt1T/
 P7KuFYPh/Tym+LISDBfk7MeOXZWsffvUDP653cGQiIMgmumEgVrU1+vR2Z0qRiRe
 95ZDIuQBmyGNBG9MiB0+zB7+STsvLECkPVWYDJCNbGVgrlHL6UHne06edrSpfr30
 13PyZeJAojezrt2hzLO43V7bu9acRmLo6WNdh6N2stfJv8QSQYSQO87baRdRB+rO
 I1r2jP7TJp9ZRtzSTsYLfpyhCGLcvXY58bci+Tz9x6xWMJ/HH5HvfJjxO17HzbdD
 2se6MKFVbOXT7DQK+BvQBDIO52t731DWZs4t7SJg24kDoINL7XiC/qSHC0vHJJM=
 =Cs0b
 -----END PGP SIGNATURE-----

Merge tag 'stable/for-linus-3.18-b-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen bug fixes from David Vrabel:

 - Fix regression in xen_clocksource_read() which caused all Xen guests
   to crash early in boot.
 - Several fixes for super rare race conditions in the p2m.
 - Assorted other minor fixes.

* tag 'stable/for-linus-3.18-b-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/pci: Allocate memory for physdev_pci_device_add's optarr
  x86/xen: panic on bad Xen-provided memory map
  x86/xen: Fix incorrect per_cpu accessor in xen_clocksource_read()
  x86/xen: avoid race in p2m handling
  x86/xen: delay construction of mfn_list_list
  x86/xen: avoid writing to freed memory after race in p2m handling
  xen/balloon: Don't continue ballooning when BP_ECANCELED is encountered
2014-10-24 12:41:50 -07:00
Linus Torvalds
c6d13403a1 sound fixes for 3.18-rc2
Here are a chunk of small fixes since rc1: two PCM core fixes, one is
 a long-standing annoyance about lockdep and another is an ARM64 mmap
 fix.  The rest are a HD-audio HDMI hotplug notification fix, a fix for
 missing NULL termination in Realtek codec quirks and a few new
 device/codec-specific quirks as usual.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQIcBAABAgAGBQJUSgjCAAoJEGwxgFQ9KSmklGAP/iPygJ0Pm6j2osKxBAxUXTu4
 daLgoRJAC5+eHi2U4PLpNI6EzB6rhIAmbvm4CVMs3XmYKIptabVfTtsUpOshQsU+
 WYkZQ8WFHZf4ZtM8OgSbC3NVTmdJe5N98NBM+XY9ow6h9RXM3ZV1m1TAgVYMARn0
 Ue4wtWiD3fsJcm50nV11n8hjKF+BfwB94K/b5dAstFxUwe20FRvYpphptDWsPP4u
 NoMi10L7DLLujF3qNyY12+6XGv1ECL6jUX0jEdx76bG3jS/JOxrLyavA0+rx8dcm
 iOa4EgfTq3eYM9smdVdVTCJ+suG6pBuDg24xLn5dwCR8S/rUYU6EXfaPDKYqVYTa
 /O3lKtYIFbWONEnGhULEX1lV87ZbzZHaQP4Cr/QlH3D4AwLdpLqdv9/jDs3i/+S9
 GVozlbl/IffhxCuLPriNGdDZFZmo4eRPBzywOLiooVgR5LHdUSSufgDvzU858BTL
 L08BOs2DjeWFVb4cuBnzsWGS4QSCX/01EM0ftEAgX2SdseibtHNBze9ntHR/c1be
 ieijRu0jQMa4VNWSjmIOzR9fFKy7Bw1mN7EEl0a2t43IXc7gpog5jezMZEhMs2bA
 NW3j65d+Vd3UUWAzfwMuNJ776lCg30r0hzpnGr54frhfjYbe0Rrs5hHOQkW9kcJv
 E+LzcPoWfoT61wpH39dz
 =VrJV
 -----END PGP SIGNATURE-----

Merge tag 'sound-3.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Here are a chunk of small fixes since rc1: two PCM core fixes, one is
  a long-standing annoyance about lockdep and another is an ARM64 mmap
  fix.

  The rest are a HD-audio HDMI hotplug notification fix, a fix for
  missing NULL termination in Realtek codec quirks and a few new
  device/codec-specific quirks as usual"

* tag 'sound-3.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Add missing terminating entry to SND_HDA_PIN_QUIRK macro
  ALSA: pcm: Fix false lockdep warnings
  ALSA: hda - Fix inverted LED gpio setup for Lenovo Ideapad
  ALSA: hda - hdmi: Fix missing ELD change event on plug/unplug
  ALSA: usb-audio: Add support for Steinberg UR22 USB interface
  ALSA: ALC283 codec - Avoid pop noise on headphones during suspend/resume
  ALSA: pcm: use the same dma mmap codepath both for arm and arm64
2014-10-24 12:35:48 -07:00
Linus Torvalds
14d4cc0883 This adds a memzero_explicit() call which is guaranteed not to be
optimized away by GCC.  This is important when we are wiping
 cryptographically sensitive material.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQIcBAABCAAGBQJUQTmuAAoJENNvdpvBGATwFToP/jOGL/Z5NE7Oa33jC+oRDdEC
 6gDXi27emzkll5BsxRLOR26vxXZ9AsBBI+U9pmhy64pcSUSxocTIZ+Bh0bx/LQyd
 w6HTTTYFk9GNtQCGrxRoNBPLdH/qz83ClvlWmpjsYpIEFfSOU3YncygSbps3uSeZ
 tdXiI5G1zZNGrljQrL+roJCZX5TP4XxHFbdUjeyV9Z8210oYTwCfpzHjg9+D24f0
 rwTOHa0Lp6IrecU4Vlq4PFP+y4/ZdYYVwnpyX5UtTHP3QP176PcrwvnAl4Ys/8Lx
 9uqj+gNrUnC6KHsSKhUxwMq9Ch7nu6iLLAYuIUMvxZargsmbNQFShHZyu2mwDgko
 bp+oTw8byOQyv6g/hbFpTVwfwpiv/AGu8VxmG3ORGqndOldTh+oQ9xMnuBZA8sXX
 PxHxEUY9hr66nVFg4iuxT/2KJJA+Ol8ARkB0taCWhwavzxXJeedEVEw5nbtQxRsM
 AJGxjBsAgSw7SJD03yAQH5kRGYvIdv03JRbIiMPmKjlP+pl1JkzOAPhVMUD+24vI
 x6oFpSa5FH5utlt3nCZuxlOYBuWhWKIhUzEoY2HwCsyISQScPcwL9EP15sWceY5i
 8+Wylvf+yqGVU3KopCBBV/oX3Wm/kj1A8OP/4Kk8UHw9k2btjYETYayhP1DHKnIt
 /4pr4+oGd5GlFOHRteXp
 =i29U
 -----END PGP SIGNATURE-----

Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random

Pull /dev/random updates from Ted Ts'o:
 "This adds a memzero_explicit() call which is guaranteed not to be
  optimized away by GCC.  This is important when we are wiping
  cryptographically sensitive material"

* tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
  crypto: memzero_explicit - make sure to clear out sensitive data
  random: add and use memzero_explicit() for clearing data
2014-10-24 12:33:32 -07:00
Linus Torvalds
1c45d9a920 ACPI and power management updates for 3.18-rc2
- Fix for a recent PCI power management change that overlooked
    the fact that some IRQ chips might not be able to configure
    PCIe PME for system wakeup from Lucas Stach.
 
  - Fix for a bug introduced in 3.17 where acpi_device_wakeup()
    is called with a wrong ordering of arguments from Zhang Rui.
 
  - A bunch of intel_pstate driver fixes (all -stable candidates)
    from Dirk Brandewie, Gabriele Mazzotta and Pali Rohár.
 
  - Fixes for a rather long-standing problem with the OOM killer
    and the freezer that frozen processes killed by the OOM do
    not actually release any memory until they are thawed, so
    OOM-killing them is rather pointless, with a couple of
    cleanups on top (Michal Hocko, Cong Wang, Rafael J Wysocki).
 
  - ACPICA update to upstream release 20140926, inlcuding mostly
    cleanups reducing differences between the upstream ACPICA and
    the kernel code, tools changes (acpidump, acpiexec) and
    support for the _DDN object (Bob Moore, Lv Zheng).
 
  - New PM QoS class for memory bandwidth from Tomeu Vizoso.
 
  - Default 32-bit DMA mask for platform devices enumerated by ACPI
    (this change is mostly needed for some drivers development in
    progress targeted at 3.19) from Heikki Krogerus.
 
  - ACPI EC driver cleanups, mostly related to debugging, from
    Lv Zheng.
 
  - cpufreq-dt driver updates from Thomas Petazzoni.
 
  - powernv cpuidle driver update from Preeti U Murthy.
 
 /
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.22 (GNU/Linux)
 
 iQIcBAABCAAGBQJUSjZFAAoJEILEb/54YlRxyfIP/irc/f7DDb0mElF755ANtSXp
 CTVIQSn6uZ2P//ElQO0+nckZSo39jrBkHVu11vDxmVt2PJE2VBgNjHJLyf1boaPI
 9aR5kzVmL6jzJ9wA3gYqr91uCVegY1KDFx2KrAlrNomrlc2xtTGf6F17I4tI9qHL
 pgc8jhJZ1swn4wL0qnqffLsmx3Hoq3uIO5PNAXD+qUSgm5+8zZwLLlvnrM8upOO4
 cHTvxh+ZwXrak4RO4NciYZPKJQAD47MTcJCDR/bg7MKxeiJPrzLrR+WrbCYr5md1
 iSiVThZDZnnYTiDLPiemcXoe3jpG2bigXncxJVRDJ7MBOO7ZX7mppwdNnMaNM5kN
 92kvLOy269NSS2SFJ0N/B6Xr1jQ0HEdwj7erl4xJIkobKRuvN9fYyVWkoL9i3sj4
 OQ7fqhXoEON9CW0KwC5FRAswIungB//o5OjN7VlNKTBKfPdWAjgVQOyeeZ+gSoQo
 9tbR/QEEEcHn8fiQpBM9cQw2NL0Rx1ZzHXs7dB0U6ynfG5Drge4OTTwl/Gm4mavB
 8Tv3ji26VvQdFr+It2SsijjjjjzVIsdK5iUpSHYo876u4l20CEH3gSpVA/jNhgH6
 HaAN5DYIot4Qq5ifjDydRT6WGIyxsVMk3SqehjF47TDaX4l1FbSYWGVyKxfjnQs3
 2rWJ3yuDjH28Cfmi0MO0
 =4Q8f
 -----END PGP SIGNATURE-----

Merge tag 'pm+acpi-3.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management updates from Rafael Wysocki:
 "This is material that didn't make it to my 3.18-rc1 pull request for
  various reasons, mostly related to timing and travel (LinuxCon EU /
  LPC) plus a couple of fixes for recent bugs.

  The only really new thing here is the PM QoS class for memory
  bandwidth, but it is simple enough and users of it will be added in
  the next cycle.  One major change in behavior is that platform devices
  enumerated by ACPI will use 32-bit DMA mask by default.  Also included
  is an ACPICA update to a new upstream release, but that's mostly
  cleanups, changes in tools and similar.  The rest is fixes and
  cleanups mostly.

  Specifics:

   - Fix for a recent PCI power management change that overlooked the
     fact that some IRQ chips might not be able to configure PCIe PME
     for system wakeup from Lucas Stach.

   - Fix for a bug introduced in 3.17 where acpi_device_wakeup() is
     called with a wrong ordering of arguments from Zhang Rui.

   - A bunch of intel_pstate driver fixes (all -stable candidates) from
     Dirk Brandewie, Gabriele Mazzotta and Pali Rohár.

   - Fixes for a rather long-standing problem with the OOM killer and
     the freezer that frozen processes killed by the OOM do not actually
     release any memory until they are thawed, so OOM-killing them is
     rather pointless, with a couple of cleanups on top (Michal Hocko,
     Cong Wang, Rafael J Wysocki).

   - ACPICA update to upstream release 20140926, inlcuding mostly
     cleanups reducing differences between the upstream ACPICA and the
     kernel code, tools changes (acpidump, acpiexec) and support for the
     _DDN object (Bob Moore, Lv Zheng).

   - New PM QoS class for memory bandwidth from Tomeu Vizoso.

   - Default 32-bit DMA mask for platform devices enumerated by ACPI
     (this change is mostly needed for some drivers development in
     progress targeted at 3.19) from Heikki Krogerus.

   - ACPI EC driver cleanups, mostly related to debugging, from Lv
     Zheng.

   - cpufreq-dt driver updates from Thomas Petazzoni.

   - powernv cpuidle driver update from Preeti U Murthy"

* tag 'pm+acpi-3.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (34 commits)
  intel_pstate: Correct BYT VID values.
  intel_pstate: Fix BYT frequency reporting
  intel_pstate: Don't lose sysfs settings during cpu offline
  cpufreq: intel_pstate: Reflect current no_turbo state correctly
  cpufreq: expose scaling_cur_freq sysfs file for set_policy() drivers
  cpufreq: intel_pstate: Fix setting max_perf_pct in performance policy
  PCI / PM: handle failure to enable wakeup on PCIe PME
  ACPI: invoke acpi_device_wakeup() with correct parameters
  PM / freezer: Clean up code after recent fixes
  PM: convert do_each_thread to for_each_process_thread
  OOM, PM: OOM killed task shouldn't escape PM suspend
  freezer: remove obsolete comments in __thaw_task()
  freezer: Do not freeze tasks killed by OOM killer
  ACPI / platform: provide default DMA mask
  cpuidle: powernv: Populate cpuidle state details by querying the device-tree
  cpufreq: cpufreq-dt: adjust message related to regulators
  cpufreq: cpufreq-dt: extend with platform_data
  cpufreq: allow driver-specific data
  ACPI / EC: Cleanup coding style.
  ACPI / EC: Refine event/query debugging messages.
  ...
2014-10-24 11:29:31 -07:00
Linus Torvalds
8264fce6de Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Pull thermal management updates from Zhang Rui:
 "Sorry that I missed the merge window as there is a bug found in the
  last minute, and I have to fix it and wait for the code to be tested
  in linux-next tree for a few days.  Now the buggy patch has been
  dropped entirely from my next branch.  Thus I hope those changes can
  still be merged in 3.18-rc2 as most of them are platform thermal
  driver changes.

  Specifics:

   - introduce ACPI INT340X thermal drivers.

     Newer laptops and tablets may have thermal sensors and other
     devices with thermal control capabilities that are exposed for the
     OS to use via the ACPI INT340x device objects.  Several drivers are
     introduced to expose the temperature information and cooling
     ability from these objects to user-space via the normal thermal
     framework.

     From: Lu Aaron, Lan Tianyu, Jacob Pan and Zhang Rui.

   - introduce a new thermal governor, which just uses a hysteresis to
     switch abruptly on/off a cooling device.  This governor can be used
     to control certain fan devices that can not be throttled but just
     switched on or off.  From: Peter Feuerer.

   - introduce support for some new thermal interrupt functions on
     i.MX6SX, in IMX thermal driver.  From: Anson, Huang.

   - introduce tracing support on thermal framework.  From: Punit
     Agrawal.

   - small fixes in OF thermal and thermal step_wise governor"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (25 commits)
  Thermal: int340x thermal: select ACPI fan driver
  Thermal: int3400_thermal: use acpi_thermal_rel parsing APIs
  Thermal: int340x_thermal: expose acpi thermal relationship tables
  Thermal: introduce int3403 thermal driver
  Thermal: introduce INT3402 thermal driver
  Thermal: move the KELVIN_TO_MILLICELSIUS macro to thermal.h
  ACPI / Fan: support INT3404 thermal device
  ACPI / Fan: add ACPI 4.0 style fan support
  ACPI / fan: convert to platform driver
  ACPI / fan: use acpi_device_xxx_power instead of acpi_bus equivelant
  ACPI / fan: remove no need check for device pointer
  ACPI / fan: remove unused macro
  Thermal: int3400 thermal: register to thermal framework
  Thermal: int3400 thermal: add capability to detect supporting UUIDs
  Thermal: introduce int3400 thermal driver
  ACPI: add ACPI_TYPE_LOCAL_REFERENCE support to acpi_extract_package()
  ACPI: make acpi_create_platform_device() an external API
  thermal: step_wise: fix: Prevent from binary overflow when trend is dropping
  ACPI: introduce ACPI int340x thermal scan handler
  thermal: Added Bang-bang thermal governor
  ...
2014-10-24 11:21:43 -07:00
Catalin Marinas
3dec0fe48a arm64: Fix memblock current_limit with 64K pages and 48-bit VA
With 48-bit VA space, the 64K page configuration uses 3 levels instead
of 2 and PUD_SIZE != PMD_SIZE. Since with 64K pages we only cover
PMD_SIZE with the initial swapper_pg_dir populated in head.S, the
memblock current_limit needs to be set accordingly in map_mem() to avoid
allocating unmapped memory. The memblock current_limit is progressively
increased as more blocks are mapped.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-10-24 18:16:47 +01:00
David S. Miller
06090e8ed8 sparc64: Implement __get_user_pages_fast().
It is not sufficient to only implement get_user_pages_fast(), you
must also implement the atomic version __get_user_pages_fast()
otherwise you end up using the weak symbol fallback implementation
which simply returns zero.

This is dangerous, because it causes the futex code to loop forever
if transparent hugepages are supported (see get_futex_key()).

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-24 09:59:02 -07:00
David S. Miller
ef3e035c3a sparc64: Fix register corruption in top-most kernel stack frame during boot.
Meelis Roos reported that kernels built with gcc-4.9 do not boot, we
eventually narrowed this down to only impacting machines using
UltraSPARC-III and derivitive cpus.

The crash happens right when the first user process is spawned:

[   54.451346] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004
[   54.451346]
[   54.571516] CPU: 1 PID: 1 Comm: init Not tainted 3.16.0-rc2-00211-gd7933ab #96
[   54.666431] Call Trace:
[   54.698453]  [0000000000762f8c] panic+0xb0/0x224
[   54.759071]  [000000000045cf68] do_exit+0x948/0x960
[   54.823123]  [000000000042cbc0] fault_in_user_windows+0xe0/0x100
[   54.902036]  [0000000000404ad0] __handle_user_windows+0x0/0x10
[   54.978662] Press Stop-A (L1-A) to return to the boot prom
[   55.050713] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004

Further investigation showed that compiling only per_cpu_patch() with
an older compiler fixes the boot.

Detailed analysis showed that the function is not being miscompiled by
gcc-4.9, but it is using a different register allocation ordering.

With the gcc-4.9 compiled function, something during the code patching
causes some of the %i* input registers to get corrupted.  Perhaps
we have a TLB miss path into the firmware that is deep enough to
cause a register window spill and subsequent restore when we get
back from the TLB miss trap.

Let's plug this up by doing two things:

1) Stop using the firmware stack for client interface calls into
   the firmware.  Just use the kernel's stack.

2) As soon as we can, call into a new function "start_early_boot()"
   to put a one-register-window buffer between the firmware's
   deepest stack frame and the top-most initial kernel one.

Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-24 09:52:49 -07:00
Arun Chandran
92980405f3 arm64: ASLR: Don't randomise text when randomise_va_space == 0
When user asks to turn off ASLR by writing "0" to
/proc/sys/kernel/randomize_va_space there should not be
any randomization to mmap base, stack, VDSO, libs, text and heap

Currently arm64 violates this behavior by randomising text.
Fix this by defining a constant ELF_ET_DYN_BASE. The randomisation of
mm->mmap_base is done by setup_new_exec -> arch_pick_mmap_layout ->
mmap_base -> mmap_rnd.

Signed-off-by: Arun Chandran <achandran@mvista.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-10-24 15:47:49 +01:00
Ralf Baechle
4846f11816 MIPS: SEAD3: Fix I2C device registration.
This isn't a module and shouldn't be one.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-10-24 13:34:42 +02:00
Wanpeng Li
571ee1b685 kvm: vfio: fix unregister kvm_device_ops of vfio
After commit 80ce163 (KVM: VFIO: register kvm_device_ops dynamically),
kvm_device_ops of vfio can be registered dynamically. Commit 3c3c29fd
(kvm-vfio: do not use module_init) move the dynamic register invoked by
kvm_init in order to fix broke unloading of the kvm module. However,
kvm_device_ops of vfio is unregistered after rmmod kvm-intel module
which lead to device type collision detection warning after kvm-intel
module reinsmod.

    WARNING: CPU: 1 PID: 10358 at /root/cathy/kvm/arch/x86/kvm/../../../virt/kvm/kvm_main.c:3289 kvm_init+0x234/0x282 [kvm]()
    Modules linked in: kvm_intel(O+) kvm(O) nfsv3 nfs_acl auth_rpcgss oid_registry nfsv4 dns_resolver nfs fscache lockd sunrpc pci_stub bridge stp llc autofs4 8021q cpufreq_ondemand ipv6 joydev microcode pcspkr igb i2c_algo_bit ehci_pci ehci_hcd e1000e i2c_i801 ixgbe ptp pps_core hwmon mdio tpm_tis tpm ipmi_si ipmi_msghandler acpi_cpufreq isci libsas scsi_transport_sas button dm_mirror dm_region_hash dm_log dm_mod [last unloaded: kvm_intel]
    CPU: 1 PID: 10358 Comm: insmod Tainted: G        W  O   3.17.0-rc1 #2
    Hardware name: Intel Corporation S2600CP/S2600CP, BIOS RMLSDP.86I.00.29.D696.1311111329 11/11/2013
     0000000000000cd9 ffff880ff08cfd18 ffffffff814a61d9 0000000000000cd9
     0000000000000000 ffff880ff08cfd58 ffffffff810417b7 ffff880ff08cfd48
     ffffffffa045bcac ffffffffa049c420 0000000000000040 00000000000000ff
    Call Trace:
     [<ffffffff814a61d9>] dump_stack+0x49/0x60
     [<ffffffff810417b7>] warn_slowpath_common+0x7c/0x96
     [<ffffffffa045bcac>] ? kvm_init+0x234/0x282 [kvm]
     [<ffffffff810417e6>] warn_slowpath_null+0x15/0x17
     [<ffffffffa045bcac>] kvm_init+0x234/0x282 [kvm]
     [<ffffffffa016e995>] vmx_init+0x1bf/0x42a [kvm_intel]
     [<ffffffffa016e7d6>] ? vmx_check_processor_compat+0x64/0x64 [kvm_intel]
     [<ffffffff810002ab>] do_one_initcall+0xe3/0x170
     [<ffffffff811168a9>] ? __vunmap+0xad/0xb8
     [<ffffffff8109c58f>] do_init_module+0x2b/0x174
     [<ffffffff8109d414>] load_module+0x43e/0x569
     [<ffffffff8109c6d8>] ? do_init_module+0x174/0x174
     [<ffffffff8109c75a>] ? copy_module_from_user+0x39/0x82
     [<ffffffff8109b7dd>] ? module_sect_show+0x20/0x20
     [<ffffffff8109d65f>] SyS_init_module+0x54/0x81
     [<ffffffff814a9a12>] system_call_fastpath+0x16/0x1b
    ---[ end trace 0626f4a3ddea56f3 ]---

The bug can be reproduced by:

    rmmod kvm_intel.ko
    insmod kvm_intel.ko

without rmmod/insmod kvm.ko
This patch fixes the bug by unregistering kvm_device_ops of vfio when the
kvm-intel module is removed.

Reported-by: Liu Rongrong <rongrongx.liu@intel.com>
Fixes: 3c3c29fd0d
Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-24 13:30:47 +02:00
Nadav Amit
1715d0dcb0 KVM: x86: Wrong assertion on paging_tmpl.h
Even after the recent fix, the assertion on paging_tmpl.h is triggered.
Apparently, the assertion wants to check that the PAE is always set on
long-mode, but does it in incorrect way.  Note that the assertion is not
enabled unless the code is debugged by defining MMU_DEBUG.

Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-24 13:30:37 +02:00
Quentin Casasnovas
3d32e4dbe7 kvm: fix excessive pages un-pinning in kvm_iommu_map error path.
The third parameter of kvm_unpin_pages() when called from
kvm_iommu_map_pages() is wrong, it should be the number of pages to un-pin
and not the page size.

This error was facilitated with an inconsistent API: kvm_pin_pages() takes
a size, but kvn_unpin_pages() takes a number of pages, so fix the problem
by matching the two.

This was introduced by commit 350b8bd ("kvm: iommu: fix the third parameter
of kvm_iommu_put_pages (CVE-2014-3601)"), which fixes the lack of
un-pinning for pages intended to be un-pinned (i.e. memory leak) but
unfortunately potentially aggravated the number of pages we un-pin that
should have stayed pinned. As far as I understand though, the same
practical mitigations apply.

This issue was found during review of Red Hat 6.6 patches to prepare
Ksplice rebootless updates.

Thanks to Vegard for his time on a late Friday evening to help me in
understanding this code.

Fixes: 350b8bd ("kvm: iommu: fix the third parameter of... (CVE-2014-3601)")
Cc: stable@vger.kernel.org
Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Jamie Iles <jamie.iles@oracle.com>
Reviewed-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-24 13:30:37 +02:00
Nadav Amit
3f6f1480d8 KVM: x86: PREFETCH and HINT_NOP should have SrcMem flag
The decode phase of the x86 emulator assumes that every instruction with the
ModRM flag, and which can be used with RIP-relative addressing, has either
SrcMem or DstMem.  This is not the case for several instructions - prefetch,
hint-nop and clflush.

Adding SrcMem|NoAccess for prefetch and hint-nop and SrcMem for clflush.

This fixes CVE-2014-8480.

Fixes: 41061cdb98
Cc: stable@vger.kernel.org
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-24 13:30:36 +02:00
Nadav Amit
13e457e0ee KVM: x86: Emulator does not decode clflush well
Currently, all group15 instructions are decoded as clflush (e.g., mfence,
xsave).  In addition, the clflush instruction requires no prefix (66/f2/f3)
would exist. If prefix exists it may encode a different instruction (e.g.,
clflushopt).

Creating a group for clflush, and different group for each prefix.

This has been the case forever, but the next patch needs the cflush group
in order to fix a bug introduced in 3.17.

Fixes: 41061cdb98
Cc: stable@vger.kernel.org
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-24 13:30:36 +02:00
Paolo Bonzini
a430c91663 KVM: emulate: avoid accessing NULL ctxt->memopp
A failure to decode the instruction can cause a NULL pointer access.
This is fixed simply by moving the "done" label as close as possible
to the return.

This fixes CVE-2014-8481.

Reported-by: Andy Lutomirski <luto@amacapital.net>
Cc: stable@vger.kernel.org
Fixes: 41061cdb98
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-24 13:30:35 +02:00