| Commit message (Collapse) | Author | Age | Files | Lines |
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1. New entries can be added to tsk->pi_state_list after task completed
exit_pi_state_list(). The result is memory leakage and deadlocks.
2. handle_mm_fault() is called under spinlock. The result is obvious.
3. results in self-inflicted deadlock inside glibc.
Sometimes futex_lock_pi returns -ESRCH, when it is not expected
and glibc enters to for(;;) sleep() to simulate deadlock. This problem
is quite obvious and I think the patch is right. Though it looks like
each "if" in futex_lock_pi() got some stupid special case "else if". :-)
4. sometimes futex_lock_pi() returns -EDEADLK,
when nobody has the lock. The reason is also obvious (see comment
in the patch), but correct fix is far beyond my comprehension.
I guess someone already saw this, the chunk:
if (rt_mutex_trylock(&q.pi_state->pi_mutex))
ret = 0;
is obviously from the same opera. But it does not work, because the
rtmutex is really taken at this point: wake_futex_pi() of previous
owner reassigned it to us. My fix works. But it looks very stupid.
I would think about removal of shift of ownership in wake_futex_pi()
and making all the work in context of process taking lock.
From: Thomas Gleixner <tglx@linutronix.de>
Fix 1) Avoid the tasklist lock variant of the exit race fix by adding
an additional state transition to the exit code.
This fixes also the issue, when a task with recursive segfaults
is not able to release the futexes.
Fix 2) Cleanup the lookup_pi_state() failure path and solve the -ESRCH
problem finally.
Fix 3) Solve the fixup_pi_state_owner() problem which needs to do the fixup
in the lock protected section by using the in_atomic userspace access
functions.
This removes also the ugly lock drop / unqueue inside of fixup_pi_state()
Fix 4) Fix a stale lock in the error path of futex_wake_pi()
Added some error checks for verification.
The -EDEADLK problem is solved by the rtmutex fixups.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ulrich Drepper <drepper@redhat.com>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Instead of returning the smallest available object return ZERO_SIZE_PTR.
A ZERO_SIZE_PTR can be legitimately used as an object pointer as long as it
is not deferenced. The dereference of ZERO_SIZE_PTR causes a distinctive
fault. kfree can handle a ZERO_SIZE_PTR in the same way as NULL.
This enables functions to use zero sized object. e.g. n = number of objects.
objects = kmalloc(n * sizeof(object));
for (i = 0; i < n; i++)
objects[i].x = y;
kfree(objects);
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* git://git.linux-xtensa.org/kernel/xtensa-feed:
Xtensa: use asm-generic/fcntl.h
[XTENSA] Remove non-rt signal handling
[XTENSA] Move common sections into bss sections
[XTENSA] clean-up header files
[XTENSA] Use generic 64-bit division
[XTENSA] Remove multi-exported symbols from xtensa_ksyms.c
[XTENSA] fix sources using deprecated assembler directive
[XTENSA] Spelling fixes in arch/xtensa
[XTENSA] fix bit operations in bitops.h
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Commit fc4fb2adf944d45a7f3d4d38df991c79ffdb6a43 "fixed" the Xtensa
asm/fcntl.h and in doing so ignored asm-generic/fcntl.h completely.
It turns out that it is now exactly the same as asm-generic/fcntl.h.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Chris Zankel <zankel@tensilica.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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The non-rt signal handling was never really used, so we don't break
anything. This patch also cleans up the signal stack-frame to make
it independent from the processor configuration. It also improves
the method used for controlling single-stepping. We now save and
restore the 'icountlevel' register that controls single stepping
and set or clear the saved state to enable or disable it.
Signed-off-by: Chris Zankel <chris@zankel.net>
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The header files in the asm-xtensa directory are not clean and
'make headers_check' fails. This is a first patch to fix most of
the header files. It removes unnecessary include statements and
adds some that are required for building the kernel. The linker
script required some updates or the linking stage would fail.
Signed-off-by: Chris Zankel <chris@zankel.net>
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Use generic 64-bit division algorithm from the asm-generic directory.\
Signed-off-by: Chris Zankel <chris@zankel.net>
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A macro used internally in the bitops.h file to identify the number of
leading zeros (__cntlz) was implemented incorrectly for Xtensa processors
that don't provide the 'nsa/nsau' instructions. As a result, the dependent
functions and macros (ffs, ffz, fls) were broken.
Signed-off-by: Chris Zankel <chris@zankel.net>
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master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (24 commits)
xfrm: Add security check before flushing SAD/SPD
[NET_SCHED]: Fix filter double free
[NET]: Avoid duplicate netlink notification when changing link state
[UDP]: Revert 2-pass hashing changes.
[AF_UNIX]: Fix stream recvmsg() race.
[NETFILTER]: nf_conntrack_amanda: fix textsearch_prepare() error check
[NETFILTER]: ip_tables: fix compat related crash
[NETFILTER]: nf_conntrack: fix helper module unload races
[RTNETLINK]: ifindex 0 does not exist
[NETLINK]: Mark netlink policies const
[TCP] tcp_probe: Attach printf attribute properly to printl().
[TCP]: Use LIMIT_NETDEBUG in tcp_retransmit_timer().
[NET]: Merge dst_discard_in and dst_discard_out.
[RFKILL]: Make rfkill->name const
[IPV4]: Restore old behaviour of default config values
[IPV4]: Add default config support after inetdev_init
[IPV4]: Convert IPv4 devconf to an array
[IPV4]: Only panic if inetdev_init fails for loopback
[TCP]: Honour sk_bound_dev_if in tcp_v4_send_ack
[BNX2]: Update version and reldate.
...
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Currently we check for permission before deleting entries from SAD and
SPD, (see security_xfrm_policy_delete() security_xfrm_state_delete())
However we are not checking for authorization when flushing the SPD and
the SAD completely. It was perhaps missed in the original security hooks
patch.
This patch adds a security check when flushing entries from the SAD and
SPD. It runs the entire database and checks each entry for a denial.
If the process attempting the flush is unable to remove all of the
entries a denial is logged the the flush function returns an error
without removing anything.
This is particularly useful when a process may need to create or delete
its own xfrm entries used for things like labeled networking but that
same process should not be able to delete other entries or flush the
entire database.
Signed-off-by: Joy Latten<latten@austin.ibm.com>
Signed-off-by: Eric Paris <eparis@parisplace.org>
Signed-off-by: James Morris <jmorris@namei.org>
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This reverts changesets:
6aaf47fa48d3c44280810b1b470261d340e4ed87
b7b5f487ab39bc10ed0694af35651a03d9cb97ff
de34ed91c4ffa4727964a832c46e624dd1495cf5
fc038410b4b1643766f8033f4940bcdb1dace633
There are still some correctness issues recently
discovered which do not have a known fix that doesn't
involve doing a full hash table scan on port bind.
So revert for now.
Signed-off-by: David S. Miller <davem@davemloft.net>
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check_compat_entry_size_and_hooks iterates over the matches and calls
compat_check_calc_match, which loads the match and calculates the
compat offsets, but unlike the non-compat version, doesn't call
->checkentry yet. On error however it calls cleanup_matches, which in
turn calls ->destroy, which can result in crashes if the destroy
function (validly) expects to only get called after the checkentry
function.
Add a compat_release_match function that only drops the module reference
on error and rename compat_check_calc_match to compat_find_calc_match to
reflect the fact that it doesn't call the checkentry function.
Reported by Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Dmitry Mishin <dim@openvz.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The rfkill name can be made const safely,
this makes the compiler happy when drivers make
it point to some const string used elsewhere.
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Previously inet devices were only constructed when addresses are added
(or rarely in ipmr). Therefore the default config values they get are
the ones at the time of these operations.
Now that we're creating inet devices earlier, this changes the
behaviour of default config values in an incompatible way (see bug
#8519).
This patch creates a compromise by setting the default values at the
same point as before but only for those that have not been explicitly
set by the user since the inet device's creation.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Previously once inetdev_init has been called on a device any changes
made to ipv4_devconf_dflt would have no effect on that device's
configuration.
This creates a problem since we have moved the point where
inetdev_init is called from when an address is added to where the
device is registered.
This patch is the first half of a set that tries to mimic the old
behaviour while still calling inetdev_init.
It propagates any changes to ipv4_devconf_dflt to those devices that
have not had the corresponding attribute set.
The next patch will forcibly set all values at the point where
inetdev_init was previously called.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch converts the ipv4_devconf config members (everything except
sysctl) to an array. This allows easier manipulation which will be
needed later on to provide better management of default config values.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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A time_wait socket inherits sk_bound_dev_if from the original socket,
but it is not used when sending ACK packets using ip_send_reply.
Fix by passing the oif to ip_send_reply in struct ip_reply_arg and
use it for output routing.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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* master.kernel.org:/home/rmk/linux-2.6-arm:
[ARM] pxa: fix pxa27x keyboard driver
[ARM] Fix 4417/1: Serial: Fix AMBA drivers locking
[ARM] 4421/1: AT91: Value of _KEY fields.
[ARM] Solve buggy smp_processor_id() usage
[ARM] 4422/1: Fix default value handling in gpio_direction_output (PXA)
[ARM] 4419/1: AT91: SAM9 USB clocks check for suspending
[ARM] 4418/1: AT91: Number of programmable clocks differs
[ARM] 4392/2: Do not corrupt the SP register in compressed/head.S
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Use the actual value (0xA5) for the AT91_SHDW_KEY and AT91_WDT_KEY
register fields instead of a bitmask.
This is consistent with how AT91_RSTC_KEY is defined, and is easier to
use in code.
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The default value passed through to pxa_gpio_mode() is lost
due to a missing GPIO_DFLT_HIGH mask for nonzero values. The enclosed
patch fixes this programming error.
Signed-off-by: Bill Gatliff <bgat@billgatliff.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
[MIPS] Fix warning by moving do_default_vi into CONFIG_CPU_MIPSR2_SRS
[MIPS] Fix some minor typoes in arch/mips/Kconfig.
[MIPS] Remove prototype for deleted function qemu_handle_int
[MIPS] Fix some system calls with long long arguments
[MIPS] Make dma_map_sg handle sg elements which are longer than one page
[MIPS] Drop __ARCH_WANT_SYS_FADVISE64
[MIPS] Fix VGA corruption on RM300C
[MIPS] RM300: Fix MMIO problems by marking the PCI INT ACK region busy
[MIPS] EMMA2RH: remove dead KGDB code
[MIPS] Remove duplicate fpu enable hazard code.
[MIPS] Atlas, Malta, SEAD: Remove scroll from interrupt handler.
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sys_fadvise64() is not used on MIPS. The libc can implement
both posix_fadvise() and posix_fadvise64() using sys_fadvise64_64().
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Use common code from hazards.h instead.
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Aside of being handy for debugging this has never been a particularly
good idea but is now getting in the way of dyntick / tickless kernels
and general cleanups.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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In file included from /usr/src/linux-2.6-2/net/ipv4/ip_input.c:118:
include2/asm/system.h:245: error: parse error before "__cmpxchg_32"
include2/asm/system.h:245: error: parse error before '*' token
include2/asm/system.h:245: warning: type defaults to `int' in declaration of `__cmpxchg_32'
include2/asm/system.h:245: warning: function declaration isn't a prototype
include2/asm/system.h:245: warning: data definition has no type or storage class
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh: Fix se73180 platform device registration.
sh: ioremap() through PMB needs asm/mmu.h.
sh: voyagergx: Fix build warnings.
sh: Fix SH4-202 clock fwk set_rate() mismatch.
sh: microdev: Fix compile warnings.
sh: Fix in_nmi symbol build error.
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Copy and paste error from se7343, fix it up.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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It's not just sun4v hypervisor platforms that should return true
for this, sun4u with UltraSPARC-IV should return true too.
Signed-off-by: David S. Miller <davem@davemloft.net>
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The scheduling domain hierarchy is:
all cpus -->
cpus that share an instruction cache -->
cpus that share an integer execution unit
Signed-off-by: David S. Miller <davem@davemloft.net>
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If the system supports hypervisor based statistics, allow them to
be fetched, enabled, and disabled via sysfs.
Enable and disable via the boolean:
/sys/devices/systems/cpu/cpuN/mmustat_enable
Statistic values are provided under:
/sys/devices/systems/cpu/cpuN/mmu_status/
Signed-off-by: David S. Miller <davem@davemloft.net>
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* git://git.infradead.org/mtd-2.6:
[JFFS2] Fix obsoletion of metadata nodes in jffs2_add_tn_to_tree()
[MTD] Fix error checking after get_mtd_device() in get_sb_mtd functions
[JFFS2] Fix buffer length calculations in jffs2_get_inode_nodes()
[JFFS2] Fix potential memory leak of dead xattrs on unmount.
[JFFS2] Fix BUG() caused by failing to discard xattrs on deleted files.
[MTD] generalise the handling of MTD-specific superblocks
[MTD] [MAPS] don't force uclinux mtd map to be root dev
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Generalise the handling of MTD-specific superblocks so that JFFS2 and ROMFS
can both share it.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
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Several people have reported LITE-ON LTR-48246S detection failed
because SETXFER fails. It seems the device raises IRQ too early after
SETXFER. This is controller independent. The same problem has been
reported for different controllers.
So, now we have pata_via where the controller raises IRQ before it's
ready after SETXFER and a device which does similar thing. This patch
makes libata always execute SETXFER via polling. As this only happens
during EH, performance impact is nil. Setting ATA_TFLAG_POLLING is
also moved from issue hot path to ata_dev_set_xfermode() - the only
place where SETXFER can be issued.
Note that ATA_TFLAG_POLLING applies only to drivers which implement
SFF TF interface and use libata HSM. More advanced controllers ignore
the flag. This doesn't matter for this fix as SFF TF controllers are
the problematic ones.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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The unix_state_*() locking macros imply that there is some
rwlock kind of thing going on, but the implementation is
actually a spinlock which makes the code more confusing than
it needs to be.
So use plain unix_state_lock and unix_state_unlock.
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
[POWERPC] Fix zImage.coff generation for 32-bit pmac
[POWERPC] Fix compile breakage for IBM/AMCC 4xx arch/ppc platforms
[POWERPC] Don't allow PMAC_APM_EMU for 64-bit
[POWERPC] Compare irq numbers with NO_IRQ not IRQ_NONE
[POWERPC] Fix return from pte_alloc_one() in out-of-memory case
[POWERPC] Fix compile warning in pseries xics code
[POWERPC] Don't use HOSTCFLAGS in BOOTCFLAGS
[POWERPC] Create a zImage for legacy iSeries
[POWERPC] pasemi idle uses hard_smp_processor_id
[POWERPC] ps3/interrupt.c uses get_hard_smp_processor_id
[POWERPC] Fix possible access to free pages
[POWERPC] Fix compiler/assembler flags for Ebony platform boot files
[POWERPC] Fix ppc32 single-stepping out of syscalls
[POWERPC] Update documentation for of_find_node_by_type()
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pte_alloc_one() is expected to return NULL if out of memory.
But it returns virt_to_page(NULL), which is not NULL.
This fixes it.
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Akinobu Mita <mita@fixstars.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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I think we have a subtle race on ppc64 with the tlb batching. The
common code expects tlb_flush() to actually flush any pending TLB
batch. It does that because it delays all page freeing until after
tlb_flush() is called, in order to ensure no stale reference to
those pages exist in any TLB, thus causing potential access to
the freed pages.
However, our tlb_flush only triggers the RCU for freeing page
table pages, it does not currently trigger a flush of a pending
TLB/hash batch, which is, I think, an error. This fixes it.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Add __init to:
acpi_initialize_subsystem() (and un-export it)
acpi_os_initialize()
Add __initdata to:
acpi_osl_dmi_table[]
Signed-off-by: Len Brown <len.brown@intel.com>
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The boot option "acpi_osi=" has always disabled Linux _OSI support,
thus disabling all OS Interface strings which are advertised
by Linux to the BIOS.
Now...
acpi_osi="string" adds the interface string, and
acpi_osi="!string" invalidates the pre-defined interface string
eg. acpi_osi="!Windows 2006"
would disable Linux's claim of Vista compatibility.
Signed-off-by: Len Brown <len.brown@intel.com>
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Implemented support to allow Package objects to be passed as
method arguments to the acpi_evaluate_object interface. Previously,
this would return an AE_NOT_IMPLEMENTED exception.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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Last of the "Section mismatch" errors from ia64 builds! acpi_map_pxm_to_node()
is defined with attribute __cpuinit, but is called by "normal" kernel functions
acpi_getnode() and acpi_map_cpu2node().
Commit f363d16fbb9374c0bd7f2757d412c287169094c9 moved the data structures on
which this routine operates from __cpuinitdata to regular memory, so this
routine can also move out of init space.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
firewire: Install firewire-constants.h and firewire-cdev.h for userspace.
firewire: Change struct fw_cdev_iso_packet to not use bitfields.
firewire: Implement suspend/resume PCI driver hooks.
firewire: add to MAINTAINERS
firewire: fw-sbp2: implement sysfs ieee1394_id
ieee1394: sbp2: offer SAM-conforming target port ID in sysfs
ieee1394: fix calculation of sysfs attribute "address"
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This just adds them to include/linux/Kbuild using header-y.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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The struct is part of the userspace interface and can not use
bitfields. This patch replaces the bitfields with a __u32 'control'
word and provides access macros to set the bits.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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The <linux/serial_core.h> header refers to handle_sysrq(), but does not
include <linux/sysrq.h> which provides a declaration of the function. This
may result in an implicit declaration and a warning if the actual one is
seen later on.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Add comment for errnos related to restart syscall to avoid the leakage of
them to user programs.
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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