- 11 Sep, 2013 40 commits
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Alexandre Courbot authored
When decompressing into memory, the output buffer length is set to some arbitrarily high value (0x7fffffff) to indicate the output is, virtually, unlimited in size. The problem with this is that some platforms have their physical memory at high physical addresses (0x80000000 or more), and that the output buffer address and its "unlimited" length cannot be added without overflowing. An example of this can be found in inflate_fast(): /* next_out is the output buffer address */ out = strm->next_out - OFF; /* avail_out is the output buffer size. end will overflow if the output * address is >= 0x80000104 */ end = out + (strm->avail_out - 257); This has huge consequences on the performance of kernel decompression, since the following exit condition of inflate_fast() will be always true: } while (in < last && out < end); Indeed, "end" has overflowed and is now always lower than "out". As a result, inflate_fast() will return after processing one single byte of input data, and will thus need to be called an unreasonably high number of times. This probably went unnoticed because kernel decompression is fast enough even with this issue. Nonetheless, adjusting the output buffer length in such a way that the above pointer arithmetic never overflows results in a kernel decompression that is about 3 times faster on affected machines. Signed-off-by:
Alexandre Courbot <acourbot@nvidia.com> Tested-by:
Jon Medhurst <tixy@linaro.org> Cc: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Gu Zheng authored
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by:
Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by:
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Emilio López authored
The documentation mentions a "name" parameter, which does not exist. This commit removes such mention from the function documentation. Signed-off-by:
Emilio López <emilio@elopez.com.ar> Signed-off-by:
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Joe Perches authored
It's clearer to have patterns marked as directories. Change the directory patterns without terminating slashes. Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
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Christian Daudt authored
Add ownership to maintainers file for the mach-bcm related files, including drivers that are used for the SoCs defined in mach-bcm. Signed-off-by:
Christian Daudt <csd@broadcom.com> Cc: Olof Johansson <olof@lixom.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by:
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Joe Perches authored
Commit c50cd357 ("net: gre: move GSO functions to gre_offload") renamed and separated the file into multiple files. Update the patterns. Signed-off-by:
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Joe Perches authored
Commit a0e63123 ("usb: phy: move all PHY drivers to drivers/usb/phy/") deleted the files, remove the file pattern. Signed-off-by:
Felipe Balbi <balbi@ti.com> Signed-off-by:
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Joe Perches authored
Commit f3bc64d6 ("USB: EHCI: DT support for generic bus glue") removed the ehci-vt8500.c file, update the file pattern to include ehci-platform.c. Signed-off-by:
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Joe Perches authored
Commit 6659a20a ("ARC: MAINTAINERS update for ARC") typoed the file pattern. Fix it. Signed-off-by:
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Joe Perches authored
Commit 45fcac1a ("mfd: Move ssbi driver into drivers/mfd") move the files, update the patterns. Signed-off-by:
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Joe Perches authored
Commit d7104bff ("[media] MAINTAINERS: add drivers/media/tuners/it913x*") used the incorrect file patterns. Fix it. Signed-off-by:
Antti Palosaari <crope@iki.fi> Cc: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by:
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Joe Perches authored
Commit c937ca03 ("[media] MAINTAINERS: Add maintainer entry for si4713 FM transmitter driver") typoed the pattern, fix it. Signed-off-by:
Eduardo Valentin <edubezval@gmail.com> Cc: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by:
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Joe Perches authored
Commit 786baecf ("[media] dvb-usb: move it to drivers/media/usb/dvb-usb") moved the files, update the pattern. Signed-off-by:
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Joe Perches authored
Commit 77c5f5d2 ("ghes_edac: Register at EDAC core the BIOS report") typoed the file pattern. Fix it. Signed-off-by:
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Joe Perches authored
Commit 09ec1d7e ("ARM: S3C24XX: Remove plat-s3c24xx directory in arch/arm/") moved the files, remove the pattern. Signed-off-by:
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Joe Perches authored
Commit 694e33a7 ("ARM: plat-nomadik: move MTU, kill plat-nomadik") moved the files, update the patterns. Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Joe Perches authored
Commit a7ed099f ("ARM: spear: move all files to mach-spear") moved all the files into a single directory, delete the now unnecessary duplicate sections and update the pattern. Signed-off-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
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Joe Perches authored
Commit 85fd6d63 ("ARM: S3C2410: move mach-s3c2410/* into mach-s3c24xx/") moved the files, update the patterns. Signed-off-by:
Kukjin Kim <kgene.kim@samsung.com> Signed-off-by:
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Joe Perches authored
Commit 49815399 ("ARM: OMAP2+: powerdomain/PRM: move the low-level powerdomain") renamed the files, update the patterns. Identical to a patch earlier sent by Cesar Eduardo Barros. Signed-off-by:
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Joe Perches authored
Commit 4bd5259e ("ARM: OMAP2/3: clockdomain/PRM/CM: move the low-level clockdomain functions into PRM/CM") deleted the files, update the pattern. Identical to a patch earlier sent by Cesar Eduardo Barros. Signed-off-by:
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Joe Perches authored
Commit ca914350 ("ARM: EXYNOS: Remove unused board files") removed the files, remove the patterns too. Signed-off-by:
Kyungmin Park <kyungmin.park@samsung.com> Cc: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by:
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Oleg Nesterov authored
No functional changes, just comments. Signed-off-by:
Oleg Nesterov <oleg@redhat.com> Signed-off-by:
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Oleg Nesterov authored
Trivial. Remove the unnecessary "work = NULL" initialization and turn read_barrier_depends() into smp_read_barrier_depends() in task_work_cancel(). Signed-off-by:
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David Daney authored
As in commit f21afc25 ("smp.h: Use local_irq_{save,restore}() in !SMP version of on_each_cpu()"), we don't want to enable irqs if they are not already enabled. I don't know of any bugs currently caused by this unconditional local_irq_enable(), but I want to use this function in MIPS/OCTEON early boot (when we have early_boot_irqs_disabled). This also makes this function have similar semantics to on_each_cpu() which is good in itself. Signed-off-by:
David Daney <david.daney@cavium.com> Cc: Gilad Ben-Yossef <gilad@benyossef.com> Cc: Christoph Lameter <cl@linux.com> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by:
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Sergei Trofimovich authored
Unclutter -Wmissing-prototypes warning types (enabled at make W=1) linux/include/linux/syscalls.h:190:18: warning: no previous prototype for 'SyS_semctl' [-Wmissing-prototypes] asmlinkage long SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ ^ linux/include/linux/syscalls.h:183:2: note: in expansion of macro '__SYSCALL_DEFINEx' __SYSCALL_DEFINEx(x, sname, __VA_ARGS__) ^ by adding forward declarations right before definitions. Signed-off-by:Sergei Trofimovich <slyfox@gentoo.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Uwe Kleine-König authored
At least on ARM no-MMU the extable is empty and so there is nothing to sort. So add a check for the table to be empty which effectively only changes that the misleading pr_notice is suppressed. Signed-off-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: David Daney <david.daney@cavium.com> Cc: "H. Peter Anvin" <hpa@linux.intel.com> Cc: Borislav Petkov <bp@suse.de> Signed-off-by:
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David Daney authored
All of the other non-trivial !SMP versions of functions in smp.h are out-of-line in up.c. Move on_each_cpu() there as well. This allows us to get rid of the #include <linux/irqflags.h>. The drawback is that this makes both the x86_64 and i386 defconfig !SMP kernels about 200 bytes larger each. Signed-off-by:
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David Daney authored
The SMP version of this function doesn't unconditionally enable irqs, so neither should this !SMP version. There are no know problems caused by this, but we make the change for consistency's sake. Signed-off-by:
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David Daney authored
As in commit f21afc25 ("smp.h: Use local_irq_{save,restore}() in !SMP version of on_each_cpu()"), we don't want to enable irqs if they are not already enabled. There are currently no known problematical callers of these functions, but since it is a known failure pattern, we preemptively fix them. Since they are not trivial functions, make them non-inline by moving them to up.c. This also makes it so we don't have to fix #include dependancies for preempt_{disable,enable}. Signed-off-by:
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Will Deacon authored
When running with GENERIC_LOCKBREAK=y, the locking implementations emit calls to arch_{read,write,spin}_relax when spinning on a contended lock in order to allow architectures to favour the CPU owning the lock if possible. In reality, everybody apart from PowerPC and S390 just does cpu_relax() here, so make that the default behaviour and allow it to be overridden if required. Signed-off-by:Will Deacon <will.deacon@arm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Chen Gang authored
When failure occurs in hotplug_cfd(), need release related resources, or will cause memory leak. Signed-off-by:
Chen Gang <gang.chen@asianux.com> Acked-by:
Wang YanQing <udknight@gmail.com> Signed-off-by:
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Gu Zheng authored
Free the bio_integrity_pool in the fail path of biovec_create_pool in function bioset_integrity_create(). Signed-off-by:
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Andi Kleen authored
We cannot assume that the inline assembler code always ends up in the same file as the original C file. So make any assembler labels that are called with "extern" by C global Signed-off-by:
Andi Kleen <ak@linux.intel.com> Cc: Wim Van Sebroeck <wim@iguana.be> Signed-off-by:
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Andi Kleen authored
const has to use __initconst, not __initdata Signed-off-by:
David Howells <dhowells@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
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Mathieu Desnoyers authored
I found the following pattern that leads in to interesting findings: grep -r "ret.*|=.*__put_user" * grep -r "ret.*|=.*__get_user" * grep -r "ret.*|=.*__copy" * The __put_user() calls in compat_ioctl.c, ptrace compat, signal compat, since those appear in compat code, we could probably expect the kernel addresses not to be reachable in the lower 32-bit range, so I think they might not be exploitable. For the "__get_user" cases, I don't think those are exploitable: the worse that can happen is that the kernel will copy kernel memory into in-kernel buffers, and will fail immediately afterward. The alpha csum_partial_copy_from_user() seems to be missing the access_ok() check entirely. The fix is inspired from x86. This could lead to information leak on alpha. I also noticed that many architectures map csum_partial_copy_from_user() to csum_partial_copy_generic(), but I wonder if the latter is performing the access checks on every architectures. Signed-off-by:
Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Oleg Nesterov <oleg@redhat.com> Cc: David Miller <davem@davemloft.net> Signed-off-by:
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Jingoo Han authored
The use of strict_strtoul() is not preferred, because strict_strtoul() is obsolete. Thus, kstrtoul() should be used. Signed-off-by:
Jingoo Han <jg1.han@samsung.com> Cc: Matt Fleming <matt.fleming@intel.com> Cc: Tom Gundersen <teg@jklm.no> Cc: Mike Waychison <mikew@google.com> Acked-by:
Mike Waychison <mikew@google.com> Signed-off-by:
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Shuah Khan authored
Convert drivers/platform/x86/apple-gmux to use dev_pm_ops instead of legacy pm_ops. This patch depends on pnp driver bus ops change to invoke pnp_driver dev_pm_ops. Signed-off-by:
Shuah Khan <shuah.kh@samsung.com> Cc: Matthew Garrett <matthew.garrett@nebula.com> Cc: Leonidas Da Silva Barbosa <leosilva@linux.vnet.ibm.com> Cc: Ashley Lai <ashley@ashleylai.com> Cc: Rajiv Andrade <mail@srajiv.net> Cc: Marcel Selhorst <tpmdd@selhorst.net> Cc: Sirrix AG <tpmdd@sirrix.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Peter Hüwe <PeterHuewe@gmx.de> Signed-off-by:
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Shuah Khan authored
Convert drivers/char/tpm/tpm_tis.c to use dev_pm_ops instead of legacy pm_ops. This patch depends on pnp driver bus ops change to invoke pnp_driver dev_pm_ops. Signed-off-by:
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Shuah Khan authored
Convert drivers/rtc/rtc-cmos to use dev_pm_ops instead of legacy pm_ops. This patch depends on pnp driver bus ops change to invoke pnp_driver dev_pm_ops. Signed-off-by:
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Shuah Khan authored
pnp_bus_suspend() and pnp_bus_resume() invoke legacy pm_ops from pnp_driver. Changed pnp_bus_suspend() and pnp_bus_resume() to check if pnp driver has dev_pm_ops and call. If dev_pm_ops don't exist, then call use legacy pm_ops. Without this change, pnp_driver dev_pm_ops will not get called. In addition to the pnp driver bus pm_ops change to invoke driver dev_pm_ops, this patch set contains changes to rtc-cmos, tpm_tis, and apple-gmux pnp drivers to convert from legacy pm_ops to dev_pm_ops. This patch (of 4): pnp_bus_suspend() and pnp_bus_resume() invoke legacy pm_ops from pnp_driver. Changed pnp_bus_suspend() and pnp_bus_resume() to check if pnp driver has dev_pm_ops and call. If dev_pm_ops don't exist, then call use legacy pm_ops. Without this change, pnp_driver dev_pm_ops will not get called. Signed-off-by:
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