| Commit message (Collapse) | Author | Age |
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Do not go beyond ARRAY_SIZE of viocd_diskinfo
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Currently blkfront gives a warning when hot unplugging due to calling
del_gendisk() with interrupts disabled (due to blkif_io_lock).
WARNING: at kernel/softirq.c:124 local_bh_enable+0x36/0x84()
Modules linked in: xenfs xen_netfront ext3 jbd mbcache xen_blkfront
Pid: 13, comm: xenwatch Not tainted 2.6.29-xs5.5.0.13 #3
Call Trace:
[<c012611c>] warn_slowpath+0x80/0xb6
[<c0104cf1>] xen_sched_clock+0x16/0x63
[<c0104710>] xen_force_evtchn_callback+0xc/0x10
[<c0104e32>] check_events+0x8/0xe
[<c0104d9b>] xen_restore_fl_direct_end+0x0/0x1
[<c0103749>] xen_mc_flush+0x10a/0x13f
[<c0105bd2>] __switch_to+0x114/0x14e
[<c011d92b>] dequeue_task+0x62/0x70
[<c0123b6f>] finish_task_switch+0x2b/0x84
[<c0299877>] schedule+0x66d/0x6e7
[<c0104710>] xen_force_evtchn_callback+0xc/0x10
[<c0104710>] xen_force_evtchn_callback+0xc/0x10
[<c012a642>] local_bh_enable+0x36/0x84
[<c022f9a7>] sk_filter+0x57/0x5c
[<c0233dae>] netlink_broadcast+0x1d5/0x315
[<c01c6371>] kobject_uevent_env+0x28d/0x331
[<c01e7ead>] device_del+0x10f/0x120
[<c01e7ec6>] device_unregister+0x8/0x10
[<c015f86d>] bdi_unregister+0x2d/0x39
[<c01bf6f4>] unlink_gendisk+0x23/0x3e
[<c01ac946>] del_gendisk+0x7b/0xe7
[<d0828c19>] blkfront_closing+0x28/0x6e [xen_blkfront]
[<d082900c>] backend_changed+0x3ad/0x41d [xen_blkfront]
We can fix this by calling del_gendisk() later in blkfront_closing, after
releasing blkif_io_lock. Since the queue is stopped during the interrupts
disabled phase I don't think there is any danger of an event occuring between
releasing the blkif_io_lock and deleting the disk.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Connected
This situation can occur when attempting to attach a block device whose
backend is an empty physical CD-ROM driver. The backend in this case
will go directly from the Initialising state to Closing->Closed.
Previously this would result in a NULL pointer deref on info->gd
(xenbus_dev_fatal does not return as a1a15ac5 seems to expect)
Cc: stable@kernel.org
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
cifs: fix pointer initialization and checks in cifs_follow_symlink (try #4)
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This is the third respin of the patch posted yesterday to fix the error
handling in cifs_follow_symlink. It also includes a fix for a bogus NULL
pointer check in CIFSSMBQueryUnixSymLink that Jeff Moyer spotted.
It's possible for CIFSSMBQueryUnixSymLink to return without setting
target_path to a valid pointer. If that happens then the current value
to which we're initializing this pointer could cause an oops when it's
kfree'd.
This patch is a little more comprehensive than the last patches. It
reorganizes cifs_follow_link a bit for (hopefully) better readability.
It should also eliminate the uneeded allocation of full_path on servers
without unix extensions (assuming they can get to this point anyway, of
which I'm not convinced).
On a side note, I'm not sure I agree with the logic of enabling this
query even when unix extensions are disabled on the client. It seems
like that should disable this as well. But, changing that is outside the
scope of this fix, so I've left it alone for now.
Reported-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Reviewed-by: Christoph Hellwig <hch@inraded.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6:
mfd: pcf50633: fix unsafe disable_irq()
mfd: Keep a cache of WM8350 volatile values
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Without this change Openmoko Freerunner (GTA02) bootstrap will deadlock.
As pointed out in other patches this issue is in the wild since the merge
of:
: commit 3aa551c9b4c40018f0e261a178e3d25478dc04a9
: Author: Thomas Gleixner <tglx@linutronix.de>
: Date: Mon Mar 23 18:28:15 2009 +0100
:
: genirq: add threaded interrupt handler support
:
: Add support for threaded interrupt handlers
Signed-off-by: Nelson Castillo <arhuaco@freaks-unidos.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: <balajirrao@openmoko.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Due to the way that the WM8350 audio driver handles CODEC_ENA many of
the WM8350 audio registers are marked as volatile when they aren't
actually so. Allow the audio driver to see a cache of these values for
inspection during interrupt context.
To do this we need to stop satisfying any bits from volatile registers
from cache - there's no real benefit from doing so anyway, we did the
read already.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
ipv4: make default for INET_LRO consistent with help text
net: fix skb_seq_read returning wrong offset/length for page frag data
pkt_sched: gen_estimator: use 64 bit intermediate counters for bps
be2net: add two new pci device ids to pci device table
sch_teql: should not dereference skb after ndo_start_xmit()
tcp: fix MSG_PEEK race check
Doc: fixed descriptions on /proc/sys/net/core/* and /proc/sys/net/unix/*
Neterion: *FIFO1_DMA_ERR set twice, should 2nd be *FIFO2_DMA_ERR?
mv643xx_eth: fix PPC DMA breakage
bonding: fix link down handling in 802.3ad mode
bridge: fix initial packet flood if !STP
bridge: relay bridge multicast pkgs if !STP
NET: Meth: Fix unsafe mix of irq and non-irq spinlocks.
mlx4_en: Fix not deleted napi structures
ipconfig: handle case of delayed DHCP server
netpoll: don't dereference NULL dev from np
wimax/i2400m: fix device crash: fix optimization in _roq_queue_update_ws
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Commit e81963b1 ("ipv4: Make INET_LRO a bool instead of tristate.")
changed this config from tristate to bool. Add default so that it is
consistent with the help text.
Signed-off-by: Frans Pop <elendil@planet.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When called with a consumed value that is less than skb_headlen(skb)
bytes into a page frag, skb_seq_read() incorrectly returns an
offset/length relative to skb->data. Ensure that data which should come
from a page frag does.
Signed-off-by: Thomas Chenault <thomas_chenault@dell.com>
Tested-by: Shyam Iyer <shyam_iyer@dell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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gen_estimator can overflow bps (bytes per second) with Gb links, while
it was designed with a u32 API, with a theorical limit of 34360Mbit
(2^32 bytes)
Using 64 bit intermediate avbps/brate counters can allow us to reach
this theorical limit.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Ajit Khaparde <ajitk@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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It is illegal to dereference a skb after a successful ndo_start_xmit()
call. We must store skb length in a local variable instead.
Bug was introduced in 2.6.27 by commit 0abf77e55a2459aa9905be4b226e4729d5b4f0cb
(net_sched: Add accessor function for packet length for qdiscs)
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 518a09ef11 (tcp: Fix recvmsg MSG_PEEK influence of
blocking behavior) lets the loop run longer than the race check
did previously expect, so we need to be more careful with this
check and consider the work we have been doing.
I tried my best to deal with urg hole madness too which happens
here:
if (!sock_flag(sk, SOCK_URGINLINE)) {
++*seq;
...
by using additional offset by one but I certainly have very
little interest in testing that part.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Tested-by: Frans Pop <elendil@planet.nl>
Tested-by: Ian Zimmermann <itz@buug.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Wang Tinggong <wangtinggong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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FIFO1_DMA_ERR is set twice, the second should be FIFO2_DMA_ERR.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Ram Vepa <ram.vepa@neterion.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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After 2.6.29, PPC no more admits passing NULL to the dev parameter of
the DMA API. The result is a BUG followed by solid lock-up when the
mv643xx_eth driver brings an interface up. The following patch makes
the driver work on my Pegasos again; it is mostly a search and replace
of NULL by mp->dev->dev.parent in dma allocation/freeing/mapping/unmapping
functions.
Signed-off-by: Gabriel Paubert <paubert@iram.es>
Acked-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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One of the purposes of bonding is to allow for redundant links, and failover
correctly if the cable is pulled. If all the members of a bonded device have
no carrier present, the bonded device itself needs to report no carrier present
to user space so management tools (like routing daemons) can respond.
Bonding in 802.3ad mode does not work correctly for this because it incorrectly
chooses a link that is down as a possible aggregator.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/inaky/wimax
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When the i2400m receives data and the device indicates there has to be
reordering, we keep an sliding window implementation to sort the
packets before sending them to the network stack.
One of the "operations" that the device indicates is "queue a packet
and update the window start". When the queue is empty, this is
equivalent to "deliver the packet and update the window start".
That case was optimized in i2400m_roq_queue_update_ws() so that we
would not pointlessly queue and dequeue a packet. However, when the
optimization was active, it wasn't updating the window start. That
caused the reorder management code to get confused later on with what
seemed to be wrong reorder requests from the device.
Thus the fix implemented is to do the right thing and update the
window start in both cases, when the queue is empty (and the
optimization is done) and when not.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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If bridge is configured with no STP and forwarding delay of 0 (which
is typical for virtualization) then when link starts it will flood all
packets for the first 20 seconds.
This bug was introduced by a combination of earlier changes:
* forwarding database uses hold time of zero to indicate
user wants to always flood packets
* optimzation of the case of forwarding delay of 0 avoids the initial
timer tick
The fix is to just skip all the topology change detection code if
kernel STP is not being used.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently the bridge catches all STP packets; even if STP is turned
off. This prevents other systems (which do have STP turned on)
from being able to detect loops in the network.
With this patch, if STP is off, then any packet sent to the STP
multicast group address is forwarded to all ports.
Based on earlier patch by Joakim Tjernlund with changes
to go through forwarding (not local chain), and optimization
that only last octet needs to be checked.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Mixing of normal and irq spinlocks results in the following lockdep messages
on bootup on IP32:
[...]
Sending DHCP requests .
======================================================
[ INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected ]
2.6.30-rc5-00164-g41baeef #30
------------------------------------------------------
swapper/1 [HC0[0]:SC0[1]:HE0:SE0] is trying to acquire:
(&priv->meth_lock){+.+...}, at: [<ffffffff8026388c>] meth_tx+0x48/0x43c
and this task is already holding:
(_xmit_ETHER#2){+.-...}, at: [<ffffffff802d3a00>] __qdisc_run+0x118/0x30c
which would create a new lock dependency:
(_xmit_ETHER#2){+.-...} -> (&priv->meth_lock){+.+...}
but this new dependency connects a SOFTIRQ-irq-safe lock:
(_xmit_ETHER#2){+.-...}
... which became SOFTIRQ-irq-safe at:
[<ffffffff80061458>] __lock_acquire+0x784/0x1a14
[<ffffffff800627e0>] lock_acquire+0xf8/0x150
[<ffffffff800128d0>] _spin_lock+0x30/0x44
[<ffffffff802d2b88>] dev_watchdog+0x70/0x398
[<ffffffff800433b8>] run_timer_softirq+0x1a8/0x248
[<ffffffff8003da5c>] __do_softirq+0xec/0x208
[<ffffffff8003dbd8>] do_softirq+0x60/0xe4
[<ffffffff8003dda0>] irq_exit+0x54/0x9c
[<ffffffff80004420>] ret_from_irq+0x0/0x4
[<ffffffff80004720>] r4k_wait+0x20/0x40
[<ffffffff80015418>] cpu_idle+0x30/0x60
[<ffffffff804cd934>] start_kernel+0x3ec/0x404
to a SOFTIRQ-irq-unsafe lock:
(&priv->meth_lock){+.+...}
... which became SOFTIRQ-irq-unsafe at:
... [<ffffffff800614f8>] __lock_acquire+0x824/0x1a14
[<ffffffff800627e0>] lock_acquire+0xf8/0x150
[<ffffffff800128d0>] _spin_lock+0x30/0x44
[<ffffffff80263f20>] meth_reset+0x118/0x2d8
[<ffffffff8026424c>] meth_open+0x28/0x140
[<ffffffff802c1ae8>] dev_open+0xe0/0x18c
[<ffffffff802c1268>] dev_change_flags+0xd8/0x1d4
[<ffffffff804e7770>] ip_auto_config+0x1d4/0xf28
[<ffffffff80012e68>] do_one_initcall+0x58/0x170
[<ffffffff804cd190>] kernel_init+0x98/0x104
[<ffffffff8001520c>] kernel_thread_helper+0x10/0x18
other info that might help us debug this:
2 locks held by swapper/1:
#0: (rcu_read_lock){.+.+..}, at: [<ffffffff802c0954>] dev_queue_xmit+0x1e0/0x4b0
#1: (_xmit_ETHER#2){+.-...}, at: [<ffffffff802d3a00>] __qdisc_run+0x118/0x30c
the SOFTIRQ-irq-safe lock's dependencies:
-> (_xmit_ETHER#2){+.-...} ops: 0 {
HARDIRQ-ON-W at:
[<ffffffff800614d0>] __lock_acquire+0x7fc/0x1a14
[<ffffffff800627e0>] lock_acquire+0xf8/0x150
[<ffffffff800128d0>] _spin_lock+0x30/0x44
[<ffffffff802d2b88>] dev_watchdog+0x70/0x398
[<ffffffff800433b8>] run_timer_softirq+0x1a8/0x248
[<ffffffff8003da5c>] __do_softirq+0xec/0x208
[<ffffffff8003dbd8>] do_softirq+0x60/0xe4
[<ffffffff8003dda0>] irq_exit+0x54/0x9c
[<ffffffff80004420>] ret_from_irq+0x0/0x4
[<ffffffff80004720>] r4k_wait+0x20/0x40
[<ffffffff80015418>] cpu_idle+0x30/0x60
[<ffffffff804cd934>] start_kernel+0x3ec/0x404
IN-SOFTIRQ-W at:
[<ffffffff80061458>] __lock_acquire+0x784/0x1a14
[<ffffffff800627e0>] lock_acquire+0xf8/0x150
[<ffffffff800128d0>] _spin_lock+0x30/0x44
[<ffffffff802d2b88>] dev_watchdog+0x70/0x398
[<ffffffff800433b8>] run_timer_softirq+0x1a8/0x248
[<ffffffff8003da5c>] __do_softirq+0xec/0x208
[<ffffffff8003dbd8>] do_softirq+0x60/0xe4
[<ffffffff8003dda0>] irq_exit+0x54/0x9c
[<ffffffff80004420>] ret_from_irq+0x0/0x4
[<ffffffff80004720>] r4k_wait+0x20/0x40
[<ffffffff80015418>] cpu_idle+0x30/0x60
[<ffffffff804cd934>] start_kernel+0x3ec/0x404
INITIAL USE at:
[<ffffffff80061570>] __lock_acquire+0x89c/0x1a14
[<ffffffff800627e0>] lock_acquire+0xf8/0x150
[<ffffffff800128d0>] _spin_lock+0x30/0x44
[<ffffffff802d2b88>] dev_watchdog+0x70/0x398
[<ffffffff800433b8>] run_timer_softirq+0x1a8/0x248
[<ffffffff8003da5c>] __do_softirq+0xec/0x208
[<ffffffff8003dbd8>] do_softirq+0x60/0xe4
[<ffffffff8003dda0>] irq_exit+0x54/0x9c
[<ffffffff80004420>] ret_from_irq+0x0/0x4
[<ffffffff80004720>] r4k_wait+0x20/0x40
[<ffffffff80015418>] cpu_idle+0x30/0x60
[<ffffffff804cd934>] start_kernel+0x3ec/0x404
}
... key at: [<ffffffff80cf93f0>] netdev_xmit_lock_key+0x8/0x1c8
the SOFTIRQ-irq-unsafe lock's dependencies:
-> (&priv->meth_lock){+.+...} ops: 0 {
HARDIRQ-ON-W at:
[<ffffffff800614d0>] __lock_acquire+0x7fc/0x1a14
[<ffffffff800627e0>] lock_acquire+0xf8/0x150
[<ffffffff800128d0>] _spin_lock+0x30/0x44
[<ffffffff80263f20>] meth_reset+0x118/0x2d8
[<ffffffff8026424c>] meth_open+0x28/0x140
[<ffffffff802c1ae8>] dev_open+0xe0/0x18c
[<ffffffff802c1268>] dev_change_flags+0xd8/0x1d4
[<ffffffff804e7770>] ip_auto_config+0x1d4/0xf28
[<ffffffff80012e68>] do_one_initcall+0x58/0x170
[<ffffffff804cd190>] kernel_init+0x98/0x104
[<ffffffff8001520c>] kernel_thread_helper+0x10/0x18
SOFTIRQ-ON-W at:
[<ffffffff800614f8>] __lock_acquire+0x824/0x1a14
[<ffffffff800627e0>] lock_acquire+0xf8/0x150
[<ffffffff800128d0>] _spin_lock+0x30/0x44
[<ffffffff80263f20>] meth_reset+0x118/0x2d8
[<ffffffff8026424c>] meth_open+0x28/0x140
[<ffffffff802c1ae8>] dev_open+0xe0/0x18c
[<ffffffff802c1268>] dev_change_flags+0xd8/0x1d4
[<ffffffff804e7770>] ip_auto_config+0x1d4/0xf28
[<ffffffff80012e68>] do_one_initcall+0x58/0x170
[<ffffffff804cd190>] kernel_init+0x98/0x104
[<ffffffff8001520c>] kernel_thread_helper+0x10/0x18
INITIAL USE at:
[<ffffffff80061570>] __lock_acquire+0x89c/0x1a14
[<ffffffff800627e0>] lock_acquire+0xf8/0x150
[<ffffffff800128d0>] _spin_lock+0x30/0x44
[<ffffffff80263f20>] meth_reset+0x118/0x2d8
[<ffffffff8026424c>] meth_open+0x28/0x140
[<ffffffff802c1ae8>] dev_open+0xe0/0x18c
[<ffffffff802c1268>] dev_change_flags+0xd8/0x1d4
[<ffffffff804e7770>] ip_auto_config+0x1d4/0xf28
[<ffffffff80012e68>] do_one_initcall+0x58/0x170
[<ffffffff804cd190>] kernel_init+0x98/0x104
[<ffffffff8001520c>] kernel_thread_helper+0x10/0x18
}
... key at: [<ffffffff80cf6ce8>] __key.32424+0x0/0x8
stack backtrace:
Call Trace:
[<ffffffff8000ed0c>] dump_stack+0x8/0x34
[<ffffffff80060b74>] check_usage+0x470/0x4a0
[<ffffffff80060c34>] check_irq_usage+0x90/0x130
[<ffffffff80061f78>] __lock_acquire+0x12a4/0x1a14
[<ffffffff800627e0>] lock_acquire+0xf8/0x150
[<ffffffff80012a0c>] _spin_lock_irqsave+0x60/0x84
[<ffffffff8026388c>] meth_tx+0x48/0x43c
[<ffffffff802d3a38>] __qdisc_run+0x150/0x30c
[<ffffffff802c0aa8>] dev_queue_xmit+0x334/0x4b0
[<ffffffff804e7e6c>] ip_auto_config+0x8d0/0xf28
[<ffffffff80012e68>] do_one_initcall+0x58/0x170
[<ffffffff804cd190>] kernel_init+0x98/0x104
[<ffffffff8001520c>] kernel_thread_helper+0x10/0x18
..... timed out!
IP-Config: Retrying forever (NFS root)...
Sending DHCP requests ., OK
[...]
Fixed by converting all locks to irq locks.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Tested-by: Andrew Randrianasulu <randrik_a@yahoo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Napi structures are being created each time we open a port, but when
the port is closed the napi structure is only disabled but not removed.
This bug caused hang while removing the driver.
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If a DHCP server is delayed, it's possible for the client to receive the
DHCPOFFER after it has already sent out a new DHCPDISCOVER message from
a second interface. The client then sends out a DHCPREQUEST from the
second interface, but the server doesn't recognize the device and
rejects the request.
This patch simply tracks the current device being configured and throws
away the OFFER if it is not intended for the current device. A more
sophisticated approach would be to put the OFFER information into the
struct ic_device rather than storing it globally.
Signed-off-by: Chris Friesen <cfriesen@nortel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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It looks like the dev in netpoll_poll can be NULL - at lease it's
checked at the function beginning. Thus the dev->netde_ops dereference
looks dangerous.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/holtmann/bluetooth-2.6
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git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
TPM: get_event_name stack corruption
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get_event_name uses sprintf to fill a buffer declared on the stack. It fills
the buffer 2 bytes at a time. What the code doesn't take into account is that
sprintf(buf, "%02x", data) actually writes 3 bytes. 2 bytes for the data and
then it nul terminates the string. Since we declare buf to be 40 characters
long and then we write 40 bytes of data into buf sprintf is going to write 41
characters. The fix is to leave room in buf for the nul terminator.
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
futex: setup writeable mapping for futex ops which modify user space data
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The futex code installs a read only mapping via get_user_pages_fast()
even if the futex op function has to modify user space data. The
eventual fault was fixed up by futex_handle_fault() which walked the
VMA with mmap_sem held.
After the cleanup patches which removed the mmap_sem dependency of the
futex code commit 4dc5b7a36a49eff97050894cf1b3a9a02523717 (futex:
clean up fault logic) removed the private VMA walk logic from the
futex code. This change results in a stale RO mapping which is not
fixed up.
Instead of reintroducing the previous fault logic we set up the
mapping in get_user_pages_fast() read/write for all operations which
modify user space data. Also handle private futexes in the same way
and make the current unconditional access_ok(VERIFY_WRITE) depend on
the futex op.
Reported-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
CC: stable@kernel.org
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Produce correct output for
- tagged commit (v2.6.30-rc6)
- past tagged commit (v2.6.30-rc5-299-g7c7327d)
- no tag
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* 'fixes-for-linus' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: Fix kind-of-intr checking against number of interrupts
microblaze: Update Microblaze defconfig
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+ Fix typographic fault.
Signed-off-by: Michal Simek <monstr@monstr.eu>
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Signed-off-by: Michal Simek <monstr@monstr.eu>
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git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6:
regulator: da903x: add missing __devexit_p()
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The remove function uses __devexit, so the .remove assignment needs
__devexit_p() to fix a build error with hotplug disabled.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
CC: Liam Girdwood <lrg@slimlogic.co.uk>
CC: Mike Rapoport <mike@compulab.co.il>
CC: Eric Miao <eric.miao@marvell.com>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
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Martin Knoblauch reports that trying to build 2.6.30-rc6-git3 with
RHEL4.3 userspace (gcc (GCC) 3.4.5 20051201 (Red Hat 3.4.5-2)) causes an
internal compiler error (ICE):
drivers/char/random.c: In function `get_random_int':
drivers/char/random.c:1672: error: unrecognizable insn:
(insn 202 148 150 0 /scratch/build/linux-2.6.30-rc6-git3/arch/x86/include/asm/tsc.h:23 (set (reg:SI 0 ax [91])
(subreg:SI (plus:DI (plus:DI (reg:DI 0 ax [88])
(subreg:DI (reg:SI 6 bp) 0))
(const_int -4 [0xfffffffffffffffc])) 0)) -1 (nil)
(nil))
drivers/char/random.c:1672: internal compiler error: in extract_insn, at recog.c:2083
and after some debugging it turns out that it's due to the code trying
to figure out the rough value of the current stack pointer by taking an
address of an uninitialized variable and casting that to an integer.
This is clearly a compiler bug, but it's not worth fighting - while the
current stack kernel pointer might be somewhat hard to predict in user
space, it's also not generally going to change for a lot of the call
chains for a particular process.
So just drop it, and mumble some incoherent curses at the compiler.
Tested-by: Martin Knoblauch <spamtrap@knobisoft.de>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The problem is that permission checking is skipped if atomic open is
possible, but when exec opens a file, it just opens it O_READONLY which
means EXEC permission will not be checked at that time.
This problem is observed by the following sequence (executed as root):
mount -t nfs4 server:/ /mnt4
echo "ls" >/mnt4/foo
chmod 744 /mnt4/foo
su guest -c "mnt4/foo"
Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
Tested-by: Eugene Teo <eugeneteo@kernel.sg>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc: Explicit alignment for .data.cacheline_aligned
powerpc/ps3: Update ps3_defconfig
powerpc/ftrace: Fix constraint to be early clobber
powerpc/ftrace: Use pr_devel() in ftrace.c
powerpc: Do not assert pte_locked for hugepage PTE entries
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I don't think anything guarantees that the objects in data.page_aligned
are a multiple of PAGE_SIZE, thus the section may end on any boundary.
So the following section, .data.cacheline_aligned needs an explicit
alignment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Refresh and set these options:
CONFIG_SYSFS_DEPRECATED_V2: y -> n
CONFIG_INPUT_JOYSTICK: y -> n
CONFIG_HID_SONY: n -> m
CONFIG_RTC_DRV_PS3: - -> m
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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After upgrading my distcc boxes from gcc 4.2.2 to 4.4.0, the function
graph tracer broke. This was discovered on my x86 boxes.
The issue is that gcc used the same register for an output as it did for
an input in an asm statement. I first thought this was a bug in gcc and
reported it. I was notified that gcc was correct and that the output had
to be flagged as an "early clobber".
I noticed that powerpc had the same issue and this patch fixes it.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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pr_debug() can now result in code being generated even when #DEBUG
is not defined. That's not really desirable in the ftrace code
which we want to be snappy.
With CONFIG_DYNAMIC_DEBUG=y:
size before:
text data bss dec hex filename
3334 672 4 4010 faa arch/powerpc/kernel/ftrace.o
size after:
text data bss dec hex filename
2616 360 4 2980 ba4 arch/powerpc/kernel/ftrace.o
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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With CONFIG_DEBUG_VM, an assertion is made when changing the protection
flags of a PTE that the PTE is locked. Huge pages use a different pagetable
format and the assertion is bogus and will always trigger with a bug looking
something like
Unable to handle kernel paging request for data at address 0xf1a00235800006f8
Faulting instruction address: 0xc000000000034a80
Oops: Kernel access of bad area, sig: 11 [#1]
SMP NR_CPUS=32 NUMA Maple
Modules linked in: dm_snapshot dm_mirror dm_region_hash
dm_log dm_mod loop evdev ext3 jbd mbcache sg sd_mod ide_pci_generic
pata_amd ata_generic ipr libata tg3 libphy scsi_mod windfarm_pid
windfarm_smu_sat windfarm_max6690_sensor windfarm_lm75_sensor
windfarm_cpufreq_clamp windfarm_core i2c_powermac
NIP: c000000000034a80 LR: c000000000034b18 CTR: 0000000000000003
REGS: c000000003037600 TRAP: 0300 Not tainted (2.6.30-rc3-autokern1)
MSR: 9000000000009032 <EE,ME,IR,DR> CR: 28002484 XER: 200fffff
DAR: f1a00235800006f8, DSISR: 0000000040010000
TASK = c0000002e54cc740[2960] 'map_high_trunca' THREAD: c000000003034000 CPU: 2
GPR00: 4000000000000000 c000000003037880 c000000000895d30 c0000002e5a2e500
GPR04: 00000000a0000000 c0000002edc40880 0000005700000393 0000000000000001
GPR08: f000000011ac0000 01a00235800006e8 00000000000000f5 f1a00235800006e8
GPR12: 0000000028000484 c0000000008dd780 0000000000001000 0000000000000000
GPR16: fffffffffffff000 0000000000000000 00000000a0000000 c000000003037a20
GPR20: c0000002e5f4ece8 0000000000001000 c0000002edc40880 0000000000000000
GPR24: c0000002e5f4ece8 0000000000000000 00000000a0000000 c0000002e5f4ece8
GPR28: 0000005700000393 c0000002e5a2e500 00000000a0000000 c000000003037880
NIP [c000000000034a80] .assert_pte_locked+0xa4/0xd0
LR [c000000000034b18] .ptep_set_access_flags+0x6c/0xb4
Call Trace:
[c000000003037880] [c000000003037990] 0xc000000003037990 (unreliable)
[c000000003037910] [c000000000034b18] .ptep_set_access_flags+0x6c/0xb4
[c0000000030379b0] [c00000000014bef8] .hugetlb_cow+0x124/0x674
[c000000003037b00] [c00000000014c930] .hugetlb_fault+0x4e8/0x6f8
[c000000003037c00] [c00000000013443c] .handle_mm_fault+0xac/0x828
[c000000003037cf0] [c0000000000340a8] .do_page_fault+0x39c/0x584
[c000000003037e30] [c0000000000057b0] handle_page_fault+0x20/0x5c
Instruction dump:
7d29582a 7d200074 7800d182 0b000000 3c004000 3960ffff 780007c6 796b00c4
7d290214 7929a302 1d290068 7d6b4a14 <800b0010> 7c000074 7800d182 0b000000
This patch fixes the problem by not asseting the PTE is locked for VMAs
backed by huge pages.
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: Fix fallback sched_clock()'s offset when using jiffies
* 'core-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
lockdep: increase MAX_LOCKDEP_ENTRIES and MAX_LOCKDEP_CHAINS
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Now that lockdep coverage has increased it has become easier to
run out of entries:
[ 21.401387] BUG: MAX_LOCKDEP_ENTRIES too low!
[ 21.402007] turning off the locking correctness validator.
[ 21.402007] Pid: 1555, comm: S99local Not tainted 2.6.30-rc5-tip #2
[ 21.402007] Call Trace:
[ 21.402007] [<ffffffff81069789>] add_lock_to_list+0x53/0xba
[ 21.402007] [<ffffffff810eb615>] ? lookup_mnt+0x19/0x53
[ 21.402007] [<ffffffff8106be14>] check_prev_add+0x14b/0x1c7
[ 21.402007] [<ffffffff8106c304>] validate_chain+0x474/0x52a
[ 21.402007] [<ffffffff8106c6fc>] __lock_acquire+0x342/0x3c7
[ 21.402007] [<ffffffff8106c842>] lock_acquire+0xc1/0xe5
[ 21.402007] [<ffffffff810eb615>] ? lookup_mnt+0x19/0x53
[ 21.402007] [<ffffffff8153aedc>] _spin_lock+0x31/0x66
Double the size - as we've done in the past.
[ Impact: allow lockdep to cover more locks ]
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Account for the initial offset to the jiffy count.
[ Impact: fix printk timestamps on architectures using fallback sched_clock() ]
Signed-off-by: Ron Lee <ron@debian.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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