When building a 64bit kernel which includes all necessary drivers and
filesystems the vmlinux kernel often gets so huge, that the linker won't
be able to resolve the branch stubs. This patch overcomes this limit by
providing an option to compile the kernel with the -mlong-calls compiler
option.
Signed-off-by: Helge Deller <deller@gmx.de>
This comment describes incredibly subtle code, so it should be right!
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
The current Makefile will only choose the hppa64 cross compiler when
running natively on hppa in a 32bit userspace.
This patch additionally chooses the correct 32/64 bit hppa compiler even
when doing real cross compiling to hppa/hppa64 from another architecture.
Signed-off-by: Helge Deller <deller@gmx.de>
PARISC fixes on 20130213
This is a couple of patches, one to fix a broken build with HPUX compatibility
and the other to solve a coherency problem we've been seeing in our TLB where
setting a page read only occasionally fails to trigger a COW because of a
stale writeable TLB entry.
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Pull input subsystem fixes from Dmitry Torokhov:
"Two small driver fixups and a documentation update for managed input
devices"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: wacom - fix wacom_set_report retry logic
Input: document that unregistering managed devices is not necessary
Input: lm8323 - fix checking PWM interrupt status
Commit c060f943d0 ("mm: use aligned zone start for pfn_to_bitidx
calculation") fixed out calculation of the index into the pageblock
bitmap when a !SPARSEMEM zome was not aligned to pageblock_nr_pages.
However, the _allocation_ of that bitmap had never taken this alignment
requirement into accout, so depending on the exact size and alignment of
the zone, the use of that index could then access past the allocation,
resulting in some very subtle memory corruption.
This was reported (and bisected) by Ingo Molnar: one of his random
config builds would hang with certain very specific kernel command line
options.
In the meantime, commit c060f943d0 has been marked for stable, so this
fix needs to be back-ported to the stable kernels that backported the
commit to use the right alignment.
Bisected-and-tested-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull xen fixes from Konrad Rzeszutek Wilk:
"Two fixes:
- A simple bug-fix for redundant NULL check.
- CVE-2013-0228/XSA-42: x86/xen: don't assume %ds is usable in
xen_iret for 32-bit PVOPS
and two reverts:
- Revert the PVonHVM kexec. The patch introduces a regression with
older hypervisor stacks, such as Xen 4.1."
* tag 'stable/for-linus-3.8-rc7-tag-two' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
Revert "xen PVonHVM: use E820_Reserved area for shared_info"
Revert "xen/PVonHVM: fix compile warning in init_hvm_pv_info"
xen: remove redundant NULL check before unregister_and_remove_pcpu().
x86/xen: don't assume %ds is usable in xen_iret for 32-bit PVOPS.
As reported by Klaus Schmidinger:
"In VDR I use an ioctl() call with FE_READ_UNCORRECTED_BLOCKS on a
device (using stb0899). After this call I check 'errno' for
EOPNOTSUPP to determine whether this device supports this call. This
used to work just fine, until a few months ago I noticed that my
devices using stb0899 didn't display their signal quality in VDR's OSD
any more. After further investigation I found that
ioctl(FE_READ_UNCORRECTED_BLOCKS) no longer returns EOPNOTSUPP, but
rather ENOTTY. And since I stop getting the signal quality in case
any unknown errno value appears, this broke my signal quality query
function."
While the changes reflect what is there at:
http://comments.gmane.org/gmane.linux.kernel/1235728
it does cause regression on userspace. So, revert it to stop the
damage.
This reverts commit 177ffe506c ("[media] dvb_frontend: return -ENOTTY
for unimplement IOCTL").
Reported-by: Klaus Schmidinger <Klaus.Schmidinger@tvdr.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull sparc fixes from David Miller:
"A couple small fixes for sparc including some THP brown-paper-bag
material:
1) During the merging of all the THP support for various
architectures, sparc missed adding a
HAVE_ARCH_TRANSPARENT_HUGEPAGE to it's Kconfig, oops.
2) Sparc needs to be mindful of hugepages in get_user_pages_fast().
3) Fix memory leak in SBUS probe, from Cong Ding.
4) The sunvdc virtual disk client driver has a test of the bitmask of
vdisk server supported operations which was off by one bit"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sunvdc: Fix off-by-one in generic_request().
sparc64: Fix get_user_pages_fast() wrt. THP.
sparc64: Add missing HAVE_ARCH_TRANSPARENT_HUGEPAGE.
sparc: kernel/sbus.c: fix memory leakage
Pull one more x86 fix from Peter Anvin:
"Sigh. One more patch in the "please don't brick my Samsung" series"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi: Clear EFI_RUNTIME_SERVICES rather than EFI_BOOT by "noefi" boot parameter
Pull PCI fix from Bjorn Helgaas:
"This is another fix for v3.8. It fixes an oops that happens when a
Thunderbolt adapter is unplugged (remove device, poll for PME events
on no-longer-existing device, oops)."
* tag '3.8-pci-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI/PM: Clean up PME state when removing a device
Pull omapdss fixes from Tomi Valkeinen:
"It'd be great if these two late fixes would still make it into 3.8.
The other one fixes ARM kernel compilation when using 'allyesconfig',
and the other makes DPI displays function again on OMAP3630 boards:
- Fix ARM compilation with "allyesconfig" (omapdrm: fix the
dependency to omapdss)
- fix DPI displays on OMAP3630 (OMAPDSS: add FEAT_DPI_USES_VDDS_DSI
to omap3630_dss_feat_list)"
* tag 'omapdss-for-3.8-rc8' of git://gitorious.org/linux-omap-dss2/linux:
omapdrm: fix the dependency to omapdss
OMAPDSS: add FEAT_DPI_USES_VDDS_DSI to omap3630_dss_feat_list
Pull i2c maintainer info update from Wolfram Sang:
"Since my old email and repos are not working anymore, and this already
caused some confusion, I think a MAINTAINERS update for 3.8 is
helpful. So, people trying I2C with the new kernel can properly reach
me and find my repos."
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
MAINTAINERS: change my email and repos
This reverts commit 9d02b43dee.
We are doing this b/c on 32-bit PVonHVM with older hypervisors
(Xen 4.1) it ends up bothing up the start_info. This is bad b/c
we use it for the time keeping, and the timekeeping code loops
forever - as the version field never changes. Olaf says to
revert it, so lets do that.
Acked-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The 'operations' bitmap corresponds one-for-one with the operation
codes, no adjustment is necessary.
Reported-by: Mark Kettenis <mark.kettenis@xs4all.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
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: Tomi Valkeinen <tomi.valkeinen@ti.com>
commit 195e672a76
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: NeilBrown <neilb@suse.de>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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/1040557https://bugzilla.kernel.org/show_bug.cgi?id=47121
The patches to fix this problem:
efi: Make 'efi_enabled' a function to query EFI facilities
83e6818974
samsung-laptop: Disable on EFI hardware
e0094244e4
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: Satoru 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: H. Peter Anvin <hpa@linux.intel.com>
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: Cyril Roelandt <tipecaml@gmail.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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: Petr Matousek <pmatouse@redhat.com>
Reported-by: Petr Matousek <pmatouse@redhat.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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".
...
Helge Deller
John David Anglin
Linus Torvalds
Mauro Carvalho Chehab
Konrad Rzeszutek Wilk
David S. Miller
Tomi Valkeinen
NeilBrown
Satoru Takeuchi
Cyril Roelandt
Jan Beulich