- 17 Feb, 2016 1 commit
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Heiko Carstens authored
When fixing the DAT off bug ("s390: fix DAT off memory access, e.g. on kdump") both Christian and I missed that we can save an additional stnsm instruction. This saves us a couple of cycles which could improve the speed of memcpy_real. Signed-off-by:Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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- 11 Feb, 2016 4 commits
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Heiko Carstens authored
The diagnose tracer will indirectly call back into the lockdep code when lockdep does not expect it (arch_spinlock). This causes lockdep to disable itself and therefore we don't have a working lock dependency validator anymore. This patch effectively disables tracing of diag 0x9c and 0x44 if lockdep is enabled. If however lockdep is enabled spinlocks are mainly implemented using a trylock variant, which will not issue any diag 0x9c or 0x44. So this change has hardly any effect on tracing except when arch_spinlock and friends are explicitly used. Reported-and-Tested-by:
David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by:
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Stefan Haberland authored
Add refcount to the DASD device when a summary unit check worker is scheduled. This prevents that the device is set offline with worker in place. Cc: stable@vger.kernel.org Signed-off-by:
Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by:
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Stefan Haberland authored
The channel checks the specified length and the provided amount of data for CCWs and provides an incorrect length error if the size does not match. Under z/VM with simulation activated the length may get changed. Having the suppress length indication bit set is stated as good CCW coding practice and avoids errors under z/VM. Cc: stable@vger.kernel.org Signed-off-by:
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Christian Borntraeger authored
commit 204ee2c5 ("s390/irqflags: optimize irq restore") optimized irqrestore to really only care about interrupts and adapted the remaining low level users. One spot (memcpy_real) was not touched, though - fix it. Otherwise a kdump kernel will fail while reading the old kernel. As we re-enable irqs with a non-standard function we have to tell lockdep about that. Fixes: 204ee2c5 ("s390/irqflags: optimize irq restore") Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:
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- 10 Feb, 2016 8 commits
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Heiko Carstens authored
git commit dc7ee00d ("s390: lowcore stack pointer offsets") introduced a regression in regard to s390_backtrace(). The stack pointer for the asynchronous stack in the lowcore now has an additional offset applied. This offset needs to be taken into account in the calculation for the low and high address for the stack. This bug was already partially fixed with commit 9cc5c206 ("s390/dumpstack: fix address ranges for asynchronous and panic stack"). This patch fixes it also for the oprofile code. Fixes: dc7ee00d ("s390: lowcore stack pointer offsets") Signed-off-by:
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Heiko Carstens authored
git commit dc7ee00d ("s390: lowcore stack pointer offsets") introduced a regression in regard to perf_callchain_kernel(). The stack pointer for the asynchronous stack in the lowcore now has an additional offset applied. This offset needs to be taken into account in the calculation for the low and high address for the stack. This bug was already partially fixed with 9cc5c206 ("s390/dumpstack: fix address ranges for asynchronous and panic stack"). This patch fixes it also for the perf_event code. Fixes: dc7ee00d ("s390: lowcore stack pointer offsets") Signed-off-by:
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Pratyush Anand authored
Implement save_stack_trace_regs, so that a stack trace of a kprobe event can be obtained. Without this we see following warning: "save_stack_trace_regs() not implemented yet." when we execute: echo stacktrace > /sys/kernel/debug/tracing/trace_options echo "p kfree" >> /sys/kernel/debug/tracing/kprobe_events echo 1 > /sys/kernel/debug/tracing/events/kprobes/enable Reported-by:
Chunyu Hu <chuhu@redhat.com> Signed-off-by:
Pratyush Anand <panand@redhat.com> [heiko.carstens@de.ibm.com]: changed patch to use __save_stack_trace() Signed-off-by:
Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by:
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Heiko Carstens authored
save_stack_trace() only saves the stack trace of the current context (interrupt or process context). This is different to what other architectures like x86 do, which save the full stack trace across different contexts. Also extract a __save_stack_trace() helper function which will be used by a follow on patch. Signed-off-by:
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Heiko Carstens authored
save_stack_trace() did not write the ULONG_MAX end marker if there is enough space left. So simply follow x86 and arm64. Signed-off-by:
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Heiko Carstens authored
git commit dc7ee00d ("s390: lowcore stack pointer offsets") introduced a regression in regard to save_stack_trace(). The stack pointer for the asynchronous and the panic stack in the lowcore now have an additional offset applied to them. This offset needs to be taken into account in the calculation for the low and high address for the stacks. This bug was already partially fixed with 9cc5c206 ("s390/dumpstack: fix address ranges for asynchronous and panic stack"). This patch fixes it also for the stacktrace code. Fixes: dc7ee00d ("s390: lowcore stack pointer offsets") Signed-off-by:
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Heiko Carstens authored
The function save_stack_trace_tsk() did not consider that it can be used for tsk == current, for which the current stack pointer obviously cannot be found in the thread structure. Fix this and get the stack pointer with an inline assembly. This fixes e.g. the output of "cat /proc/self/stack". Before: [<0000000000000000>] (null) [<ffffffffffffffff>] 0xffffffffffffffff After: [<000000000011b3ee>] save_stack_trace_tsk+0x56/0x98 [<0000000000366cde>] proc_pid_stack+0xae/0x108 [<00000000003636f0>] proc_single_show+0x70/0xc0 [<0000000000311fbc>] seq_read+0xcc/0x448 [<00000000002e7716>] __vfs_read+0x36/0x100 [<00000000002e872e>] vfs_read+0x76/0x130 [<00000000002e975e>] SyS_read+0x66/0xd8 [<000000000089490e>] system_call+0xd6/0x264 [<ffffffffffffffff>] 0xffffffffffffffff Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linuxLinus Torvalds authored
Pull module fixes from Rusty Russell: "Fix for async_probe module param added in 4.3 (clearly not widely used yet), and a much more interesting kallsyms race which has been around approximately forever. This fix is more invasive, and will require some care in backporting, but I hated all the bandaids I could think of, so... There are some more coming, which are only for breakages introduced this cycle (livepatch), but wanted these in now" * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: modules: fix longstanding /proc/kallsyms vs module insertion race. module: wrapper for symbol name. modules: fix modparam async_probe request
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- 09 Feb, 2016 2 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds authored
Pull crypto fixes from Herbert Xu: "This fixes the following issues: API: - Fix async algif_skcipher, it was broken by recent fixes. - Fix potential race condition in algif_skcipher with ctx. - Fix potential memory corruption in algif_skcipher. - Add missing lock to crypto_user when doing an alg dump. Drivers: - marvell/cesa was testing the wrong variable for NULL after allocation. - Fix potential double-free in atmel-sha. - Fix illegal call to sleepin function from atomic context in atmel-sha" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: marvell/cesa - fix test in mv_cesa_dev_dma_init() crypto: atmel-sha - remove calls of clk_prepare() from atomic contexts crypto: atmel-sha - fix atmel_sha_remove() crypto: algif_skcipher - Do not set MAY_BACKLOG on the async path crypto: algif_skcipher - Do not dereference ctx without socket lock crypto: algif_skcipher - Do not assume that req is unchanged crypto: user - lock crypto_alg_list on alg dump -
J. Bruce Fields authored
Long ago, Dave Jones complained about CONFIG_LOCALVERSION_AUTO: "I don't use the auto config, because I end up filling up /boot unless I go through and clean them out by hand every time I install a new one (which I do probably a dozen or so times a day). Is there some easy way to prune old builds I'm missing?" To which Bruce replied: "I run this by hand every now and then. I'm probably doing it all wrong" And if he is running it wrong, then so am I - because I've been using this script ever since. It is true that CONFIG_LOCALVERSION_AUTO easily ends up filling your /boot partition if you don't clean up old versions regularly, and this script helps make that easier. Checked with Bruce to see that it's fine to add this to the kernel scripts. Maybe people will come up with enhancements, but more importantly, this way I won't misplace this script whenever I install a new machine and start doing custom kernels for it. Signed-off-by:Linus Torvalds <torvalds@linux-foundation.org>
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- 08 Feb, 2016 4 commits
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git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull KVM fixes from Paolo Bonzini: "KVM-ARM fixes, mostly coming from the PMU work" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: arm64: KVM: Fix guest dead loop when register accessor returns false arm64: KVM: Fix comments of the CP handler arm64: KVM: Fix wrong use of the CPSR MODE mask for 32bit guests arm64: KVM: Obey RES0/1 reserved bits when setting CPTR_EL2 arm64: KVM: Fix AArch64 guest userspace exception injection
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Linus Torvalds authored
Merge tag 'regmap-fix-v4.5-big-endian' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap Pull regmap fix from Mark Brown: "A single revert back to v4.4 endianness handling. Commit 29bb45f2 ("regmap-mmio: Use native endianness for read/write") attempted to fix some long standing bugs in the MMIO implementation for big endian systems caused by duplicate byte swapping in both regmap and readl()/writel(). Sadly the fix makes things worse rather than better, so revert it for now" * tag 'regmap-fix-v4.5-big-endian' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: regmap: mmio: Revert to v4.4 endianness handling
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Masahiro Yamada authored
Fix the doubled "started" and tidy up the following sentences. Signed-off-by:
Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by:
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Paolo Bonzini authored
Merge tag 'kvm-arm-for-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master KVM/ARM fixes for v4.5-rc2 A few random fixes, mostly coming from the PMU work by Shannon: - fix for injecting faults coming from the guest's userspace - cleanup for our CPTR_EL2 accessors (reserved bits) - fix for a bug impacting perf (user/kernel discrimination) - fix for a 32bit sysreg handling bug
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- 07 Feb, 2016 5 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull ARM SoC fixes from Olof Johansson: "The first real batch of fixes for this release cycle, so there are a few more than usual. Most of these are fixes and tweaks to board support (DT bugfixes, etc). I've also picked up a couple of small cleanups that seemed innocent enough that there was little reason to wait (const/ __initconst and Kconfig deps). Quite a bit of the changes on OMAP were due to fixes to no longer write to rodata from assembly when ARM_KERNMEM_PERMS was enabled, but there were also other fixes. Kirkwood had a bunch of gpio fixes for some boards. OMAP had RTC fixes on OMAP5, and Nomadik had changes to MMC parameters in DT. All in all, mostly the usual mix of various fixes" * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (46 commits) ARM: multi_v7_defconfig: enable DW_WATCHDOG ARM: nomadik: fix up SD/MMC DT settings ARM64: tegra: Add chosen node for tegra132 norrin ARM: realview: use "depends on" instead of "if" after prompt ARM: tango: use "depends on" instead of "if" after prompt ARM: tango: use const and __initconst for smp_operations ARM: realview: use const and __initconst for smp_operations bus: uniphier-system-bus: revive tristate prompt arm64: dts: Add missing DMA Abort interrupt to Juno bus: vexpress-config: Add missing of_node_put ARM: dts: am57xx: sbc-am57x: correct Eth PHY settings ARM: dts: am57xx: cl-som-am57x: fix CPSW EMAC pinmux ARM: dts: am57xx: sbc-am57x: fix UART3 pinmux ARM: dts: am57xx: cl-som-am57x: update SPI Flash frequency ARM: dts: am57xx: cl-som-am57x: set HOST mode for USB2 ARM: dts: am57xx: sbc-am57x: fix SB-SOM EEPROM I2C address ARM: dts: LogicPD Torpedo: Revert Duplicative Entries ARM: dts: am437x: pixcir_tangoc: use correct flags for irq types ARM: dts: am4372: fix irq type for arm twd and global timer ARM: dts: at91: sama5d4 xplained: fix phy0 IRQ type ...
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git://git.linaro.org/landing-teams/working/fujitsu/integrationLinus Torvalds authored
Pull mailbox fixes from Jassi Brar: - fix getting element from the pcc-channels array by simply indexing into it - prevent building mailbox-test driver for archs that don't have IOMEM * 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration: mailbox: Fix dependencies for !HAS_IOMEM archs mailbox: pcc: fix channel calculation in get_pcc_channel()
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usbLinus Torvalds authored
Pull USB fixes from Greg KH: "Here are some USB fixes for 4.5-rc3. The usual, xhci fixes for reported issues, combined with some small gadget driver fixes, and a MAINTAINERS file update. All have been in linux-next with no reported issues" * tag 'usb-4.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: xhci: harden xhci_find_next_ext_cap against device removal xhci: Fix list corruption in urb dequeue at host removal usb: host: xhci-plat: fix NULL pointer in probe for device tree case usb: xhci-mtk: fix AHB bus hang up caused by roothubs polling usb: xhci-mtk: fix bpkts value of LS/HS periodic eps not behind TT usb: xhci: apply XHCI_PME_STUCK_QUIRK to Intel Broxton-M platforms usb: xhci: set SSIC port unused only if xhci_suspend succeeds usb: xhci: add a quirk bit for ssic port unused usb: xhci: handle both SSIC ports in PME stuck quirk usb: dwc3: gadget: set the OTG flag in dwc3 gadget driver. Revert "xhci: don't finish a TD if we get a short-transfer event mid TD" MAINTAINERS: fix my email address usb: dwc2: Fix probe problem on bcm2835 Revert "usb: dwc2: Move reset into dwc2_get_hwparams()" usb: musb: ux500: Fix NULL pointer dereference at system PM usb: phy: mxs: declare variable with initialized value usb: phy: msm: fix error handling in probe.
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/stagingLinus Torvalds authored
Pull staging and IIO driver fixes from Greg KH: "Here are some IIO and staging driver fixes for 4.5-rc3. All of them, except one, are for IIO drivers, and one is for a speakup driver fix caused by some earlier patches, to resolve a reported build failure" * tag 'staging-4.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: Staging: speakup: Fix allyesconfig build on mn10300 iio: dht11: Use boottime iio: ade7753: avoid uninitialized data iio: pressure: mpl115: fix temperature offset sign iio: imu: Fix dependencies for !HAS_IOMEM archs staging: iio: Fix dependencies for !HAS_IOMEM archs iio: adc: Fix dependencies for !HAS_IOMEM archs iio: inkern: fix a NULL dereference on error iio:adc:ti_am335x_adc Fix buffered mode by identifying as software buffer. iio: light: acpi-als: Report data as processed iio: dac: mcp4725: set iio name property in sysfs iio: add HAS_IOMEM dependency to VF610_ADC iio: add IIO_TRIGGER dependency to STK8BA50 iio: proximity: lidar: correct return value iio-light: Use a signed return type for ltr501_match_samp_freq()
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- 06 Feb, 2016 16 commits
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Boris BREZILLON authored
We are checking twice if dma->cache_pool is not NULL but are never testing dma->padding_pool value. Cc: stable@vger.kernel.org Signed-off-by:
Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au>
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Cyrille Pitchen authored
clk_prepare()/clk_unprepare() must not be called within atomic context. This patch calls clk_prepare() once for all from atmel_sha_probe() and clk_unprepare() from atmel_sha_remove(). Then calls of clk_prepare_enable()/clk_disable_unprepare() were replaced by calls of clk_enable()/clk_disable(). Cc: stable@vger.kernel.org Signed-off-by:
Cyrille Pitchen <cyrille.pitchen@atmel.com> Reported-by:
Matthias Mayr <matthias.mayr@student.kit.edu> Signed-off-by:
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Cyrille Pitchen authored
Since atmel_sha_probe() uses devm_xxx functions to allocate resources, atmel_sha_remove() should no longer explicitly release them. Cc: stable@vger.kernel.org Signed-off-by:
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Herbert Xu authored
The async path cannot use MAY_BACKLOG because it is not meant to block, which is what MAY_BACKLOG does. On the other hand, both the sync and async paths can make use of MAY_SLEEP. Cc: stable@vger.kernel.org Signed-off-by: -
Herbert Xu authored
Any access to non-constant bits of the private context must be done under the socket lock, in particular, this includes ctx->req. This patch moves such accesses under the lock, and fetches the tfm from the parent socket which is guaranteed to be constant, rather than from ctx->req. Cc: stable@vger.kernel.org Signed-off-by: -
Herbert Xu authored
The async path in algif_skcipher assumes that the crypto completion function will be called with the original request. This is not necessarily the case. In fact there is no need for this anyway since we already embed information into the request with struct skcipher_async_req. This patch adds a pointer to that struct and then passes it as the data to the callback function. Cc: stable@vger.kernel.org Signed-off-by:
Tadeusz Struk <tadeusz.struk@intel.com>
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Mathias Krause authored
We miss to take the crypto_alg_sem semaphore when traversing the crypto_alg_list for CRYPTO_MSG_GETALG dumps. This allows a race with crypto_unregister_alg() removing algorithms from the list while we're still traversing it, thereby leading to a use-after-free as show below: [ 3482.071639] general protection fault: 0000 [#1] SMP [ 3482.075639] Modules linked in: aes_x86_64 glue_helper lrw ablk_helper cryptd gf128mul ipv6 pcspkr serio_raw virtio_net microcode virtio_pci virtio_ring virtio sr_mod cdrom [last unloaded: aesni_intel] [ 3482.075639] CPU: 1 PID: 11065 Comm: crconf Not tainted 4.3.4-grsec+ #126 [ 3482.075639] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 [ 3482.075639] task: ffff88001cd41a40 ti: ffff88001cd422c8 task.ti: ffff88001cd422c8 [ 3482.075639] RIP: 0010:[<ffffffff93722bd3>] [<ffffffff93722bd3>] strncpy+0x13/0x30 [ 3482.075639] RSP: 0018:ffff88001f713b60 EFLAGS: 00010202 [ 3482.075639] RAX: ffff88001f6c4430 RBX: ffff88001f6c43a0 RCX: ffff88001f6c4430 [ 3482.075639] RDX: 0000000000000040 RSI: fefefefefefeff16 RDI: ffff88001f6c4430 [ 3482.075639] RBP: ffff88001f713b60 R08: ffff88001f6c4470 R09: ffff88001f6c4480 [ 3482.075639] R10: 0000000000000002 R11: 0000000000000246 R12: ffff88001ce2aa28 [ 3482.075639] R13: ffff880000093700 R14: ffff88001f5e4bf8 R15: 0000000000003b20 [ 3482.075639] FS: 0000033826fa2700(0000) GS:ffff88001e900000(0000) knlGS:0000000000000000 [ 3482.075639] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3482.075639] CR2: ffffffffff600400 CR3: 00000000139ec000 CR4: 00000000001606f0 [ 3482.075639] Stack: [ 3482.075639] ffff88001f713bd8 ffffffff936ccd00 ffff88001e5c4200 ffff880000093700 [ 3482.075639] ffff88001f713bd0 ffffffff938ef4bf 0000000000000000 0000000000003b20 [ 3482.075639] ffff88001f5e4bf8 ffff88001f5e4848 0000000000000000 0000000000003b20 [ 3482.075639] Call Trace: [ 3482.075639] [<ffffffff936ccd00>] crypto_report_alg+0xc0/0x3e0 [ 3482.075639] [<ffffffff938ef4bf>] ? __alloc_skb+0x16f/0x300 [ 3482.075639] [<ffffffff936cd08a>] crypto_dump_report+0x6a/0x90 [ 3482.075639] [<ffffffff93935707>] netlink_dump+0x147/0x2e0 [ 3482.075639] [<ffffffff93935f99>] __netlink_dump_start+0x159/0x190 [ 3482.075639] [<ffffffff936ccb13>] crypto_user_rcv_msg+0xc3/0x130 [ 3482.075639] [<ffffffff936cd020>] ? crypto_report_alg+0x3e0/0x3e0 [ 3482.075639] [<ffffffff936cc4b0>] ? alg_test_crc32c+0x120/0x120 [ 3482.075639] [<ffffffff93933145>] ? __netlink_lookup+0xd5/0x120 [ 3482.075639] [<ffffffff936cca50>] ? crypto_add_alg+0x1d0/0x1d0 [ 3482.075639] [<ffffffff93938141>] netlink_rcv_skb+0xe1/0x130 [ 3482.075639] [<ffffffff936cc4f8>] crypto_netlink_rcv+0x28/0x40 [ 3482.075639] [<ffffffff939375a8>] netlink_unicast+0x108/0x180 [ 3482.075639] [<ffffffff93937c21>] netlink_sendmsg+0x541/0x770 [ 3482.075639] [<ffffffff938e31e1>] sock_sendmsg+0x21/0x40 [ 3482.075639] [<ffffffff938e4763>] SyS_sendto+0xf3/0x130 [ 3482.075639] [<ffffffff93444203>] ? bad_area_nosemaphore+0x13/0x20 [ 3482.075639] [<ffffffff93444470>] ? __do_page_fault+0x80/0x3a0 [ 3482.075639] [<ffffffff939d80cb>] entry_SYSCALL_64_fastpath+0x12/0x6e [ 3482.075639] Code: 88 4a ff 75 ed 5d 48 0f ba 2c 24 3f c3 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 85 d2 48 89 f8 48 89 f9 4c 8d 04 17 48 89 e5 74 15 <0f> b6 16 80 fa 01 88 11 48 83 de ff 48 83 c1 01 4c 39 c1 75 eb [ 3482.075639] RIP [<ffffffff93722bd3>] strncpy+0x13/0x30 To trigger the race run the following loops simultaneously for a while: $ while : ; do modprobe aesni-intel; rmmod aesni-intel; done $ while : ; do crconf show all > /dev/null; done Fix the race by taking the crypto_alg_sem read lock, thereby preventing crypto_unregister_alg() from modifying the algorithm list during the dump. This bug has been detected by the PaX memory sanitize feature. Cc: stable@vger.kernel.org Signed-off-by:
Mathias Krause <minipli@googlemail.com> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: PaX Team <pageexec@freemail.hu> Signed-off-by:
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Linus Torvalds authored
Merge fixes from Andrew Morton: "22 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (22 commits) epoll: restrict EPOLLEXCLUSIVE to POLLIN and POLLOUT radix-tree: fix oops after radix_tree_iter_retry MAINTAINERS: trim the file triggers for ABI/API dax: dirty inode only if required thp: make deferred_split_scan() work again mm: replace vma_lock_anon_vma with anon_vma_lock_read/write ocfs2/dlm: clear refmap bit of recovery lock while doing local recovery cleanup um: asm/page.h: remove the pte_high member from struct pte_t mm, hugetlb: don't require CMA for runtime gigantic pages mm/hugetlb: fix gigantic page initialization/allocation mm: downgrade VM_BUG in isolate_lru_page() to warning mempolicy: do not try to queue pages from !vma_migratable() mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make any progress vmstat: make vmstat_update deferrable mm, vmstat: make quiet_vmstat lighter mm/Kconfig: correct description of DEFERRED_STRUCT_PAGE_INIT memblock: don't mark memblock_phys_mem_size() as __init dump_stack: avoid potential deadlocks mm: validate_mm browse_rb SMP race condition m32r: fix build failure due to SMP and MMU ...
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git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-clientLinus Torvalds authored
Pull Ceph fixes from Sage Weil: "We have a few wire protocol compatibility fixes, ports of a few recent CRUSH mapping changes, and a couple error path fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: libceph: MOSDOpReply v7 encoding libceph: advertise support for TUNABLES5 crush: decode and initialize chooseleaf_stable crush: add chooseleaf_stable tunable crush: ensure take bucket value is valid crush: ensure bucket id is valid before indexing buckets array ceph: fix snap context leak in error path ceph: checking for IS_ERR instead of NULL
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git://people.freedesktop.org/~airlied/linuxLinus Torvalds authored
Pull drm fixes from Dave Airlie: "Fixes all over the place: - amdkfd: two static checker fixes - mst: a bunch of static checker and spec/hw interaction fixes - amdgpu: fix Iceland hw properly, and some fiji bugs, along with some write-combining fixes. - exynos: some regression fixes - adv7511: fix some EDID reading issues" * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (38 commits) drm/dp/mst: deallocate payload on port destruction drm/dp/mst: Reverse order of MST enable and clearing VC payload table. drm/dp/mst: move GUID storage from mgr, port to only mst branch drm/dp/mst: change MST detection scheme drm/dp/mst: Calculate MST PBN with 31.32 fixed point drm: Add drm_fixp_from_fraction and drm_fixp2int_ceil drm/mst: Add range check for max_payloads during init drm/mst: Don't ignore the MST PBN self-test result drm: fix missing reference counting decrease drm/amdgpu: disable uvd and vce clockgating on Fiji drm/amdgpu: remove exp hardware support from iceland drm/amdgpu: load MEC ucode manually on iceland drm/amdgpu: don't load MEC2 on topaz drm/amdgpu: drop topaz support from gmc8 module drm/amdgpu: pull topaz gmc bits into gmc_v7 drm/amdgpu: The VI specific EXE bit should only apply to GMC v8.0 above drm/amdgpu: iceland use CI based MC IP drm/amdgpu: move gmc7 support out of CIK dependency drm/amdgpu/gfx7: enable cp inst/reg error interrupts drm/amdgpu/gfx8: enable cp inst/reg error interrupts ... -
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
Pull power management and ACPI fixes from Rafael Wysocki: "These are: a fix for a recently introduced false-positive warnings about PM domain pointers being changed inappropriately (harmless but annoying), an MCH size workaround quirk for one more platform, a compiler warning fix (generic power domains framework), an ACPI LPSS (Intel SoCs) driver fixup and a cleanup of the ACPI CPPC core code. Specifics: - PM core fix to avoid false-positive warnings generated when the pm_domain field is cleared for a device that appears to be bound to a driver (Rafael Wysocki). - New MCH size workaround quirk for Intel Haswell-ULT (Josh Boyer). - Fix for an "unused function" compiler warning in the generic power domains framework (Ulf Hansson). - Fixup for the ACPI driver for Intel SoCs (acpi-lpss) to set the PM domain pointer of a device properly in one place that was overlooked by a recent PM core update (Andy Shevchenko). - Removal of a redundant function declaration in the ACPI CPPC core code (Timur Tabi)" * tag 'pm+acpi-4.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PM: Avoid false-positive warnings in dev_pm_domain_set() PM / Domains: Silence compiler warning for an unused function ACPI / CPPC: remove redundant mbox_send_message() declaration ACPI / LPSS: set PM domain via helper setter PNP: Add Haswell-ULT to Intel MCH size workaround -
Jason Baron authored
In the current implementation of the EPOLLEXCLUSIVE flag (added for 4.5-rc1), if epoll waiters create different POLL* sets and register them as exclusive against the same target fd, the current implementation will stop waking any further waiters once it finds the first idle waiter. This means that waiters could miss wakeups in certain cases. For example, when we wake up a pipe for reading we do: wake_up_interruptible_sync_poll(&pipe->wait, POLLIN | POLLRDNORM); So if one epoll set or epfd is added to pipe p with POLLIN and a second set epfd2 is added to pipe p with POLLRDNORM, only epfd may receive the wakeup since the current implementation will stop after it finds any intersection of events with a waiter that is blocked in epoll_wait(). We could potentially address this by requiring all epoll waiters that are added to p be required to pass the same set of POLL* events. IE the first EPOLL_CTL_ADD that passes EPOLLEXCLUSIVE establishes the set POLL* flags to be used by any other epfds that are added as EPOLLEXCLUSIVE. However, I think it might be somewhat confusing interface as we would have to reference count the number of users for that set, and so userspace would have to keep track of that count, or we would need a more involved interface. It also adds some shared state that we'd have store somewhere. I don't think anybody will want to bloat __wait_queue_head for this. I think what we could do instead, is to simply restrict EPOLLEXCLUSIVE such that it can only be specified with EPOLLIN and/or EPOLLOUT. So that way if the wakeup includes 'POLLIN' and not 'POLLOUT', we can stop once we hit the first idle waiter that specifies the EPOLLIN bit, since any remaining waiters that only have 'POLLOUT' set wouldn't need to be woken. Likewise, we can do the same thing if 'POLLOUT' is in the wakeup bit set and not 'POLLIN'. If both 'POLLOUT' and 'POLLIN' are set in the wake bit set (there is at least one example of this I saw in fs/pipe.c), then we just wake the entire exclusive list. Having both 'POLLOUT' and 'POLLIN' both set should not be on any performance critical path, so I think that's ok (in fs/pipe.c its in pipe_release()). We also continue to include EPOLLERR and EPOLLHUP by default in any exclusive set. Thus, the user can specify EPOLLERR and/or EPOLLHUP but is not required to do so. Since epoll waiters may be interested in other events as well besides EPOLLIN, EPOLLOUT, EPOLLERR and EPOLLHUP, these can still be added by doing a 'dup' call on the target fd and adding that as one normally would with EPOLL_CTL_ADD. Since I think that the POLLIN and POLLOUT events are what we are interest in balancing, I think that the 'dup' thing could perhaps be added to only one of the waiter threads. However, I think that EPOLLIN, EPOLLOUT, EPOLLERR and EPOLLHUP should be sufficient for the majority of use-cases. Since EPOLLEXCLUSIVE is intended to be used with a target fd shared among multiple epfds, where between 1 and n of the epfds may receive an event, it does not satisfy the semantics of EPOLLONESHOT where only 1 epfd would get an event. Thus, it is not allowed to be specified in conjunction with EPOLLEXCLUSIVE. EPOLL_CTL_MOD is also not allowed if the fd was previously added as EPOLLEXCLUSIVE. It seems with the limited number of flags to not be as interesting, but this could be relaxed at some further point. Signed-off-by:
Jason Baron <jbaron@akamai.com> Tested-by:
Madars Vitolins <m@silodev.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Al Viro <viro@ftp.linux.org.uk> Cc: Eric Wong <normalperson@yhbt.net> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Hagen Paul Pfeifer <hagen@jauu.net> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Konstantin Khlebnikov authored
Helper radix_tree_iter_retry() resets next_index to the current index. In following radix_tree_next_slot current chunk size becomes zero. This isn't checked and it tries to dereference null pointer in slot. Tagged iterator is fine because retry happens only at slot 0 where tag bitmask in iter->tags is filled with single bit. Fixes: 46437f9a ("radix-tree: fix race in gang lookup") Signed-off-by:
Konstantin Khlebnikov <koct9i@gmail.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ohad Ben-Cohen <ohad@wizery.com> Cc: Jeremiah Mahler <jmmahler@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by:
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Michael Kerrisk (man-pages) authored
Commit ea8f8fc8 ("MAINTAINERS: add linux-api for review of API/ABI changes") added file triggers for various paths that likely indicated API/ABI changes. However, catching all changes in Documentation/ABI/ and include/uapi/ produces a large volume of mail to linux-api, rather than only API/ABI changes. Drop those two entries, but leave include/linux/syscalls.h and kernel/sys_ni.c to catch syscall-related changes. [josh@joshtriplett.org: redid changelog] Signed-off-by:
Michael Kerrisk <mtk.man-pages@gmail.com> Acked-by:
Shuah khan <shuahkh@osg.samsung.com> Cc: Josh Triplett <josh@joshtriplett.org> Signed-off-by:
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Dmitry Monakhov authored
Signed-off-by:
Dmitry Monakhov <dmonakhov@openvz.org> Reviewed-by:
Jan Kara <jack@suse.cz> Reviewed-by:
Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Matthew Wilcox <matthew.r.wilcox@intel.com> Signed-off-by:
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Kirill A. Shutemov authored
We need to iterate over split_queue, not local empty list to get anything split from the shrinker. Fixes: e3ae1953 ("thp: limit number of object to scan on deferred_split_scan()") Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by:
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