Thomas Gleixner [Thu, 16 Dec 2010 13:06:35 +0000 (13:06 +0000)]
drivers: serial: apbuart: Handle OF failures gracefully
The apbuart driver depends on OF and relies on everything being
available. So if it's probed on a platform which has OF support, but
no device tree is available it crashes. Triggered by the upcoming x86
OF support in randconfig testing.
Further it's inconsistent vs. the probing and exiting from the
of_match loop.
Make it robust and consistent:
- check the availablility of OF nodes before dereferencing
- return -ENODEV when the device tree lookup fails
- return -ENODEV when no uart port configuration is found
- return -ENODEV when invalid uart port configuration is found
Remove the enum_done check while at it. Driver init functions are only
called once. Remove the pointless vendor and device queries as well.
Reported-by: Ingo Molnar <mingo.elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Kristoffer Glembo <kristoffer@gaisler.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Timur Tabi [Mon, 13 Dec 2010 20:08:53 +0000 (14:08 -0600)]
tty: fix typos/errors in tty_driver.h comments
Fix various typos and other errors in comments of tty_driver.h. The most
significant is the wrong name of a function for the description of
TTY_DRIVER_DYNAMIC_DEV.
Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Tomoya MORINAGA [Thu, 16 Dec 2010 07:13:29 +0000 (16:13 +0900)]
pch_uart : fix warnings for 64bit compile
Fix the following warnings
drivers/serial/pch_uart.c: In function ‘dma_handle_rx’:
drivers/serial/pch_uart.c:685:24: warning: cast from pointer to integer of different size
drivers/serial/pch_uart.c: In function ‘dma_handle_tx’:
drivers/serial/pch_uart.c:778:23: warning: cast from pointer to integer of different size
drivers/serial/pch_uart.c: In function ‘pch_uart_init_port’:
drivers/serial/pch_uart.c:1289:20: warning: cast to pointer from integer of different size
drivers/serial/pch_uart.c: In function ‘pch_uart_exit_port’:
drivers/serial/pch_uart.c:1328:2: warning: cast from pointer to integer of different size
Ondrej Puzman [Sat, 4 Dec 2010 20:17:38 +0000 (21:17 +0100)]
8250: fix uninitialized FIFOs
I have found a bug in 8250.c driver which causes that 16550A uart FIFOs
are not turned on during initialization if they are manually configured
by setserial. UART is then working only as plain 16450 without FIFOs. On
systems with higher interrupt latency this causes buffer overruns and
loss of received data when using higher communication speeds.
I'm working for a company which produces industrial computers. These
devices typically contain high number (8 or more) of traditional 16550A
uarts - we use TL16C554A chips, but that is not much relevant. UARTs are
connected to the CPU by ISA bus (Celeron based devices) or LPC bus (Atom
based devices).
In the Linux the UARTs are using standard 8250.c driver and are
initialized using setserial command:
setserial /dev/ttyS4 uart 16550A port 0x3E0 irq 10 baud_base 115200
This executes the UART initialization through serial8250_startup()
function. At the beginning of the function up->capabilities is
initialized from uart_config:
up->capabilities = uart_config[up->port.type].flags;
Please note that neither up->port.fifosize nor up->tx_loadsz is
initialized here!!
Later in the same function serial8250_clear_fifos() is called and
disables FIFOs. The above comment says that they will be reenabled in
set_termios (they won't ...)
After serial8250_startup() the serial8250_set_termios() is called. In
this function the following check fails because up->port.fifosize is
zero because it is not initialized correctly.
fcr variable remains zero and in the end the FCR register is set to zero
which results in disabled FIFOs even if the UART type is 16550A. This is
also true for other types of UARTs with FIFOs.
If the UART is autoconfigured via 'setserial /dev/ttySx autoconfig' then
port.fifosize and tx_loadsz are initialized correctly in the
autoconfig() function and the UART is working correctly then.
I checked the source codes and I can say that this bug is present in
2.6.x series of kernels for a couple of years. Namely I can confirm its
presence in 2.6.16.57, 2.6.32.24 and 2.6.36.1 (tested all of them on our
hardware).
I think it was not noticed before because not many people use manually
configured non PNP UARTs on ISA/LPC bus these days. Also the data loss
caused by buffer overruns occures only if IRQ latency is higher then
time needed to receive one character on given communication speed.
For example our hardware looses received characters only if the UARTs
are connected throught LPC bus with SERIRQ (serial IRQ transport) and
not if they are connected to ISA bus because LPC SERIRQ has higher
interrupt latency then parallel ISA interupt lines.
Here is the patch to correct the bug created against 2.6.36.1:
Signed-off-by: Ondrej Puzman <puzman@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jamie Iles [Wed, 1 Dec 2010 23:39:36 +0000 (23:39 +0000)]
8250: add a UPIO_DWAPB32 for 32 bit accesses
Some platforms contain a Synopsys DesignWare APB UART that is attached
to a 32-bit APB bus where sub-word accesses are not allowed. Add a new
IO type (UPIO_DWAPB32) that performs 32 bit acccesses to the UART.
v2:
- don't test for 32 bit in the output fast path, provide a
separate dwabp32_serial_out() function. Refactor
dwabp_serial_out() so that we can reuse the LCR saving
code.
v3:
- rebased on top of "8250: use container_of() instead of
casting"
Jamie Iles [Wed, 1 Dec 2010 23:39:35 +0000 (23:39 +0000)]
8250: use container_of() instead of casting
The 8250 driver structure uart_8250_port took advantage of the fact
that the struct uart_port was the first member of its structure and
used an explicit cast to convert to the derived class. Replace the
explicit casts with container_of() for safety and clarity.
Cosmin Cojocar [Sun, 5 Dec 2010 15:15:10 +0000 (16:15 +0100)]
serial: omap-serial: Add support for kernel debugger
The kgdb invokes the poll_put_char and poll_get_char when communicating
with the host. This patch also changes the initialization order because the
kgdb will check at the very beginning, if there is a valid serial
driver.
Randy Dunlap [Thu, 2 Dec 2010 17:19:48 +0000 (09:19 -0800)]
serial: fix pch_uart kconfig & build
The dma_request_channel/dma_release_channel interfaces are not
built when DMADEVICES is not enabled, so make the driver depend on
DMADEVICES. Also, the help text says that the driver enables & uses
PCH_DMA, which is not enabled, so select that.
Tomoya MORINAGA [Wed, 17 Nov 2010 00:55:54 +0000 (09:55 +0900)]
Serial: EG20T: add PCH_UART driver
UART driver of Intel EG20T(Topcliff) PCH
Intel EG20T PCH is the platform controller hub that is going to be used in
Intel's general embedded platform. All IO peripherals in
Intel EG20T PCH are actually devices sitting on AMBA bus.
Intel EG20T PCH has UART I/F. Using this I/F, it is able to access system
devices connected to UART.
Jiri Slaby [Thu, 4 Nov 2010 15:20:21 +0000 (16:20 +0100)]
parisc: cleanup console handling
* use newly added for_each_console for iterating consoles
* add proper console locking
* do not initialize tmp twice
* no need to declare console_drivers, it's already done in console.h
Jiri Slaby [Thu, 4 Nov 2010 15:20:24 +0000 (16:20 +0100)]
console: add /proc/consoles
It allows users to see what consoles are currently known to the system
and with what flags.
It is based on Werner's patch, the part about traversing fds was
removed, the code was moved to kernel/printk.c, where consoles are
handled and it makes more sense to me.
Setting Rx FIFO size to 1 reduces reader process wakeup latency up to
20x for baud rates <= 9600. This patch sets the Rx FIFO size to 1 for
baud rates <= 9600 or if low latency has been requested for the tty.
Signed-off-by: Michael Trimarchi <michael@gandalf.sssup.it> Signed-off-by: Bruno Morelli <bruno@evidence.eu.com> Signed-off-by: Baurzhan Ismagulov <ibr@radix50.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Claudio Scordino [Thu, 11 Nov 2010 10:22:36 +0000 (11:22 +0100)]
serial: add Documentation about RS485 serial communications
Documentation about RS485 serial communications
Signed-off-by: Claudio Scordino <claudio@evidence.eu.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Russell King <linux@arm.linux.org.uk> Acked-by: Grant Edwards <grant.b.edwards@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Alan Cox [Thu, 4 Nov 2010 15:17:03 +0000 (15:17 +0000)]
n_gsm: Fix support for legacy encoding
The mux supports several encoding schemes. Encoding 0 is a "not
recommended" mode still sometimes used. This has now been tested with
hardware that supports this mode, and found wanting.
Fix the FCS handling in this mode and correct the state machine.
Signed-off-by: Ken Mills <ken.k.mills@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Alexey Charkov [Mon, 8 Nov 2010 17:33:20 +0000 (20:33 +0300)]
serial: Add support for UART on VIA VT8500 and compatibles
This adds a driver for the serial ports found in VIA and WonderMedia
Systems-on-Chip. Interrupt-driven FIFO operation is implemented.
The hardware also supports pure register-based operation (which is
slower) and DMA-based FIFO operation. As the FIFOs are only 16 bytes
long, DMA operation is probably not worth the hassle.
Linus Torvalds [Mon, 8 Nov 2010 19:54:53 +0000 (11:54 -0800)]
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: Add new ext4 inode tracepoints
ext4: Don't call sb_issue_discard() in ext4_free_blocks()
ext4: do not try to grab the s_umount semaphore in ext4_quota_off
ext4: fix potential race when freeing ext4_io_page structures
ext4: handle writeback of inodes which are being freed
ext4: initialize the percpu counters before replaying the journal
ext4: "ret" may be used uninitialized in ext4_lazyinit_thread()
ext4: fix lazyinit hang after removing request
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
TTY: move .gitignore from drivers/char/ to drivers/tty/vt/
TTY: create drivers/tty/vt and move the vt code there
TTY: create drivers/tty and move the tty core files there
Linus Torvalds [Mon, 8 Nov 2010 18:54:49 +0000 (10:54 -0800)]
Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-next-2.6
* 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-next-2.6:
Staging: ath6kl: remove empty files that mess with 'distclean'
staging: ath6kl: Fixing the driver to use modified mmc_host structure
Staging: solo6x10: fix build problem
Linus Torvalds [Mon, 8 Nov 2010 18:53:21 +0000 (10:53 -0800)]
Merge branch 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh: clkfwk: Fix up checkpatch warnings.
sh: make some needlessly global sh7724 clocks static
sh: add clk_round_parent() to optimize parent clock rate
sh: Simplify phys_addr_mask()/PTE_PHYS_MASK for 29/32-bit.
sh: nommu: Support building without an uncached mapping.
sh: nommu: use 32-bit phys mode.
sh: mach-se: Fix up SE7206 no ioport build.
sh: intc: Update for single IRQ reservation helper.
sh: clkfwk: Fix up rate rounding error handling.
sh: mach-se: Rip out superfluous 7751 PIO routines.
sh: mach-se: Rip out superfluous 770x PIO routines.
sh: mach-edosk7705: Kill off machtype, consolidate board def.
sh: mach-edosk7705: update for this century, kill off PIO trapping.
sh: mach-se: Rip out superfluous 7206 PIO routines.
sh: mach-systemh: Kill off dead board.
sh: mach-snapgear: Kill off machtype, consolidate board def.
sh: mach-snapgear: Rip out superfluous PIO routines.
sh: mach-microdev: SuperIO-relative ioport mapping.
Theodore Ts'o [Mon, 8 Nov 2010 18:49:33 +0000 (13:49 -0500)]
ext4: Don't call sb_issue_discard() in ext4_free_blocks()
Commit 5c521830cf (ext4: Support discard requests when running in
no-journal mode) attempts to add sb_issue_discard() for data blocks
(in data=writeback mode) and in no-journal mode. Unfortunately, this
no longer works, because in commit dd3932eddf (block: remove
BLKDEV_IFL_WAIT), sb_issue_discard() only presents a synchronous
interface, and there are times when we call ext4_free_blocks() when we
are are holding a spinlock, or are otherwise in an atomic context.
For now, I've removed the call to sb_issue_discard() to prevent a
deadlock or (if spinlock debugging is enabled) failures like this:
Theodore Ts'o [Mon, 8 Nov 2010 18:43:33 +0000 (13:43 -0500)]
ext4: handle writeback of inodes which are being freed
The following BUG can occur when an inode which is getting freed when
it still has dirty pages outstanding, and it gets deleted (in this
because it was the target of a rename). In ordered mode, we need to
make sure the data pages are written just in case we crash before the
rename (or unlink) is committed. If the inode is being freed then
when we try to igrab the inode, we end up tripping the BUG_ON at
fs/ext4/page-io.c:146.
To solve this problem, we need to keep track of the number of io
callbacks which are pending, and avoid destroying the inode until they
have all been completed. That way we don't have to bump the inode
count to keep the inode from being destroyed; an approach which
doesn't work because the count could have already been dropped down to
zero before the inode writeback has started (at which point we're not
allowed to bump the count back up to 1, since it's already started
getting freed).
Thanks to Dave Chinner for suggesting this approach, which is also
used by XFS.
sh: add clk_round_parent() to optimize parent clock rate
Sometimes it is possible and reasonable to adjust the parent clock rate to
improve precision of the child clock, e.g., if the child clock has no siblings.
clk_round_parent() is a new addition to the SH clock-framework API, that
implements such an optimization for child clocks with divisors, taking all
integer values in a range.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Vivek Goyal [Sat, 6 Nov 2010 12:16:05 +0000 (08:16 -0400)]
floppy: fix another use-after-free
While scanning the floopy code due to c093ee4f07f4 ("floppy: fix
use-after-free in module load failure path"), I found one more instance
of trying to access disk->queue pointer after doing put_disk() on
gendisk. For some reason , floppy moule still loads/unloads fine. The
object is probably still around with right pointer values.
o There seems to be one more instance of trying to cleanup the request
queue after we have called put_disk() on associated gendisk.
o This fix is more out of code inspection. Even without this fix for
some reason I am able to load/unload floppy module without any
issues.
TTY: move .gitignore from drivers/char/ to drivers/tty/vt/
The autogenerated files (consolemap_deftbl.c and defkeymap.c) need to
be ignored by git, so move the .gitignore file that was doing it to the
properly location now that the files have moved as well.
Linus Torvalds [Sat, 6 Nov 2010 01:57:04 +0000 (18:57 -0700)]
ipw2x00: remove the right /proc/net entry
Commit 27ae60f8f7aa ("ipw2x00: replace "ieee80211" with "libipw" where
appropriate") changed DRV_NAME to be "libipw", but didn't properly fix
up the places where it was used to specify the name for the /proc/net/
directory.
For backwards compatibility reasons, that directory name remained
"ieee80211", but due to the DRV_NAME change, the error case printouts
and the cleanup functions now used "libipw" instead. Which made it all
fail badly.
For example, on module unload as reported by Randy:
WARNING: at fs/proc/generic.c:816 remove_proc_entry+0x156/0x35e()
name 'libipw'
because it's trying to unregister a /proc directory that obviously
doesn't even exist.
Clean it all up to use DRV_PROCNAME for the actual /proc directory name.
Reported-and-tested-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Pavel Roskin <proski@gnu.org> Cc: John W. Linville <linville@tuxdriver.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 6 Nov 2010 00:49:22 +0000 (17:49 -0700)]
Merge branch 'kvm-updates/2.6.37' of git://git.kernel.org/pub/scm/virt/kvm/kvm
* 'kvm-updates/2.6.37' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: PPC: BookE: Load the lower half of MSR
KVM: PPC: BookE: fix sleep with interrupts disabled
KVM: PPC: e500: Call kvm_vcpu_uninit() before kvmppc_e500_tlb_uninit().
PPC: KVM: Book E doesn't have __end_interrupts.
KVM: x86: Issue smp_call_function_many with preemption disabled
KVM: x86: fix information leak to userland
KVM: PPC: fix information leak to userland
KVM: MMU: fix rmap_remove on non present sptes
KVM: Write protect memory after slot swap
Linus Torvalds [Sat, 6 Nov 2010 00:45:59 +0000 (17:45 -0700)]
floppy: fix use-after-free in module load failure path
Commit 488211844e0c ("floppy: switch to one queue per drive instead of
sharing a queue") introduced a use-after-free. We do "put_disk()" on
the disk device _before_ we then clean up the queue associated with that
disk.
Move the put_disk() down to avoid dereferencing a free'd data structure.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (41 commits)
inet_diag: Make sure we actually run the same bytecode we audited.
netlink: Make nlmsg_find_attr take a const nlmsghdr*.
fib: fib_result_assign() should not change fib refcounts
netfilter: ip6_tables: fix information leak to userspace
cls_cgroup: Fix crash on module unload
memory corruption in X.25 facilities parsing
net dst: fix percpu_counter list corruption and poison overwritten
rds: Remove kfreed tcp conn from list
rds: Lost locking in loop connection freeing
de2104x: fix panic on load
atl1 : fix panic on load
netxen: remove unused firmware exports
caif: Remove noisy printout when disconnecting caif socket
caif: SPI-driver bugfix - incorrect padding.
caif: Bugfix for socket priority, bindtodev and dbg channel.
smsc911x: Set Ethernet EEPROM size to supported device's size
ipv4: netfilter: ip_tables: fix information leak to userland
ipv4: netfilter: arp_tables: fix information leak to userland
cxgb4vf: remove call to stop TX queues at load time.
cxgb4: remove call to stop TX queues at load time.
...
Linus Torvalds [Fri, 5 Nov 2010 21:17:22 +0000 (14:17 -0700)]
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
firewire: ohci: fix race when reading count in AR descriptor
firewire: ohci: avoid reallocation of AR buffers
firewire: ohci: fix race in AR split packet handling
firewire: ohci: fix buffer overflow in AR split packet handling
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
cifs: make cifs_set_oplock_level() take a cifsInodeInfo pointer
cifs: dereferencing first then checking
cifs: trivial comment fix: tlink_tree is now a rbtree
[CIFS] Cleanup unused variable build warning
cifs: convert tlink_tree to a rbtree
cifs: store pointer to master tlink in superblock (try #2)
cifs: trivial doc fix: note setlease implemented
CIFS: Add cifs_set_oplock_level
FS: cifs, remove unneeded NULL tests
Oleg Nesterov [Fri, 5 Nov 2010 15:53:42 +0000 (16:53 +0100)]
posix-cpu-timers: workaround to suppress the problems with mt exec
posix-cpu-timers.c correctly assumes that the dying process does
posix_cpu_timers_exit_group() and removes all !CPUCLOCK_PERTHREAD
timers from signal->cpu_timers list.
But, it also assumes that timer->it.cpu.task is always the group
leader, and thus the dead ->task means the dead thread group.
This is obviously not true after de_thread() changes the leader.
After that almost every posix_cpu_timer_ method has problems.
It is not simple to fix this bug correctly. First of all, I think
that timer->it.cpu should use struct pid instead of task_struct.
Also, the locking should be reworked completely. In particular,
tasklist_lock should not be used at all. This all needs a lot of
nontrivial and hard-to-test changes.
Change __exit_signal() to do posix_cpu_timers_exit_group() when
the old leader dies during exec. This is not the fix, just the
temporary hack to hide the problem for 2.6.37 and stable. IOW,
this is obviously wrong but this is what we currently have anyway:
cpu timers do not work after mt exec.
In theory this change adds another race. The exiting leader can
detach the timers which were attached to the new leader. However,
the window between de_thread() and release_task() is small, we
can pretend that sys_timer_create() was called before de_thread().
Pavel Shilovsky [Wed, 3 Nov 2010 07:58:57 +0000 (10:58 +0300)]
cifs: make cifs_set_oplock_level() take a cifsInodeInfo pointer
All the callers already have a pointer to struct cifsInodeInfo. Use it.
Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Jean Delvare [Fri, 5 Nov 2010 14:59:29 +0000 (10:59 -0400)]
hwmon: (ltc4261) Fix error message format
adapter->id is deprecated and not set by any adapter driver, so this
was certainly not what the author wanted to use. adapter->nr maybe,
but as dev_err() already includes this value, as well as the client's
address, there's no point repeating them. Better print a simple error
message in plain English words.
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch/tile: mark "hardwall" device as non-seekable
asm-generic/stat.h: support 64-bit file time_t for stat()
arch/tile: don't allow user code to set the PL via ptrace or signal return
arch/tile: correct double syscall restart for nested signals
arch/tile: avoid __must_check warning on one strict_strtol check
arch/tile: bomb raw_local_irq_ to arch_local_irq_
arch/tile: complete migration to new kmap_atomic scheme
Scott Wood [Thu, 30 Sep 2010 19:28:50 +0000 (14:28 -0500)]
KVM: PPC: BookE: fix sleep with interrupts disabled
It is not legal to call mutex_lock() with interrupts disabled.
This will assert with debug checks enabled.
If there's a real need to disable interrupts here, it could be done
after the mutex is acquired -- but I don't see why it's needed at all.
Signed-off-by: Scott Wood <scottwood@freescale.com> Reviewed-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
Vasiliy Kulikov [Sat, 30 Oct 2010 18:54:47 +0000 (22:54 +0400)]
KVM: x86: fix information leak to userland
Structures kvm_vcpu_events, kvm_debugregs, kvm_pit_state2 and
kvm_clock_data are copied to userland with some padding and reserved
fields unitialized. It leads to leaking of contents of kernel stack
memory. We have to initialize them to zero.
In patch v1 Jan Kiszka suggested to fill reserved fields with zeros
instead of memset'ting the whole struct. It makes sense as these
fields are explicitly marked as padding. No more fields need zeroing.
1. userspace calls GET_DIRTY_LOG
2. kvm_mmu_slot_remove_write_access is called and makes a page ro
3. page fault happens and makes the page writeable
fault is logged in the bitmap appropriately
4. kvm_vm_ioctl_get_dirty_log swaps slot pointers
a lot of time passes
5. guest writes into the page
6. userspace calls GET_DIRTY_LOG
At point (5), bitmap is clean and page is writeable,
thus, guest modification of memory is not logged
and GET_DIRTY_LOG returns an empty bitmap.
The rule is that all pages are either dirty in the current bitmap,
or write-protected, which is violated here.
It seems that just moving kvm_mmu_slot_remove_write_access down
to after the slot pointer swap should fix this bug.
KVM-Stable-Tag. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Linus Torvalds [Fri, 5 Nov 2010 14:54:40 +0000 (07:54 -0700)]
Merge branch 'for-linus-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
* 'for-linus-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
m68k, m68knommu: Do not include linux/hardirq.h in asm/irqflags.h
m68knommu: add back in declaration of do_IRQ
Jeff Layton [Tue, 2 Nov 2010 20:22:50 +0000 (16:22 -0400)]
cifs: dereferencing first then checking
This patch is based on Dan's original patch. His original description is
below:
Smatch complained about a couple checking for NULL after dereferencing
bugs. I'm not super familiar with the code so I did the conservative
thing and move the dereferences after the checks.
The dereferences in cifs_lock() and cifs_fsync() were added in ba00ba64cf0 "cifs: make various routines use the cifsFileInfo->tcon
pointer". The dereference in find_writable_file() was added in 6508d904e6f "cifs: have find_readable/writable_file filter by fsuid".
The comments there say it's possible to trigger the NULL dereference
under stress.
Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Nelson Elhage [Wed, 3 Nov 2010 16:35:41 +0000 (16:35 +0000)]
inet_diag: Make sure we actually run the same bytecode we audited.
We were using nlmsg_find_attr() to look up the bytecode by attribute when
auditing, but then just using the first attribute when actually running
bytecode. So, if we received a message with two attribute elements, where only
the second had type INET_DIAG_REQ_BYTECODE, we would validate and run different
bytecode strings.
Fix this by consistently using nlmsg_find_attr everywhere.
Signed-off-by: Nelson Elhage <nelhage@ksplice.com> Signed-off-by: Thomas Graf <tgraf@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Thu, 4 Nov 2010 01:21:39 +0000 (01:21 +0000)]
fib: fib_result_assign() should not change fib refcounts
After commit ebc0ffae5 (RCU conversion of fib_lookup()),
fib_result_assign() should not change fib refcounts anymore.
Thanks to Michael who did the bisection and bug report.
Reported-by: Michael Ellerman <michael@ellerman.id.au> Tested-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Paul Mundt [Thu, 4 Nov 2010 03:51:08 +0000 (12:51 +0900)]
sh: Simplify phys_addr_mask()/PTE_PHYS_MASK for 29/32-bit.
Given that __in_29bit_mode() is a constant for the non-PMB case, we can
simply use the PMB-facing version of phys_addr_mask() and drop the other
variants.
Paul Mundt [Thu, 4 Nov 2010 03:46:19 +0000 (12:46 +0900)]
sh: nommu: Support building without an uncached mapping.
Now that nommu selects 32BIT we run in to the situation where SH-2A
supports an uncached identity mapping by way of the BSC, while the SH-2
does not. This provides stubs for the PC manglers and tidies up some of
the system*.h mess in the process.
Paul Mundt [Thu, 4 Nov 2010 03:32:24 +0000 (12:32 +0900)]
sh: nommu: use 32-bit phys mode.
The nommu code has regressed somewhat in that 29BIT gets set for the
SH-2/2A configs regardless of the fact that they are really 32BIT sans
MMU or PMB. This does a bit of tidying to get nommu properly selecting
32BIT as it was before.
Paul Mundt [Thu, 4 Nov 2010 03:21:25 +0000 (12:21 +0900)]
mmc: sh_mmcif: Convert extern inline to static inline.
Presently the extern inline case results in a compiler warning on ARM due
to the memory barrier definition used in the I/O routines. These
ultimately all want to be static inline anyways, so just convert them all
in place.
Herbert Xu [Wed, 3 Nov 2010 13:31:05 +0000 (13:31 +0000)]
cls_cgroup: Fix crash on module unload
Somewhere along the lines net_cls_subsys_id became a macro when
cls_cgroup is built as a module. Not only did it make cls_cgroup
completely useless, it also causes it to crash on module unload.
This patch fixes this by removing that macro.
Thanks to Eric Dumazet for diagnosing this problem.
Reported-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Reviewed-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xiaotian Feng [Tue, 2 Nov 2010 16:11:05 +0000 (16:11 +0000)]
net dst: fix percpu_counter list corruption and poison overwritten
There're some percpu_counter list corruption and poison overwritten warnings
in recent kernel, which is resulted by fc66f95c.
commit fc66f95c switches to use percpu_counter, in ip6_route_net_init, kernel
init the percpu_counter for dst entries, but, the percpu_counter is never destroyed
in ip6_route_net_exit. So if the related data is freed by kernel, the freed percpu_counter
is still on the list, then if we insert/remove other percpu_counter, list corruption
resulted. Also, if the insert/remove option modifies the ->prev,->next pointer of
the freed value, the poison overwritten is resulted then.
With the following patch, the percpu_counter list corruption and poison overwritten
warnings disappeared.
Signed-off-by: Xiaotian Feng <dfeng@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: "Pekka Savola (ipv6)" <pekkas@netcore.fi> Cc: James Morris <jmorris@namei.org> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: Patrick McHardy <kaber@trash.net> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Amerigo Wang [Tue, 2 Nov 2010 18:25:31 +0000 (18:25 +0000)]
netxen: remove unused firmware exports
Quote from Amit Salecha:
"Actually I was not updated, NX_UNIFIED_ROMIMAGE_NAME (phanfw.bin) is already
submitted and its present in linux-firmware.git.
I will get back to you on NX_P2_MN_ROMIMAGE_NAME, NX_P3_CT_ROMIMAGE_NAME and
NX_P3_MN_ROMIMAGE_NAME. Whether this will be submitted ?"
We have to remove these, otherwise we will get wrong info from modinfo.
Signed-off-by: WANG Cong <amwang@redhat.com> Cc: Amit Kumar Salecha <amit.salecha@qlogic.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dhananjay Phadke <dhananjay.phadke@qlogic.com> Cc: Narender Kumar <narender.kumar@qlogic.com> Acked-by: Amit Kumar Salecha <amit.salecha@qlogic.com>-- Signed-off-by: David S. Miller <davem@davemloft.net>
projects / linux-beck.git / log