47e51a7a22
16 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Greg Kroah-Hartman
|
4d01d462e6 |
This is the 4.19.129 stable release
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KVM: nSVM: fix condition for filtering async PF KVM: nSVM: leave ASID aside in copy_vmcb_control_area KVM: nVMX: Consult only the "basic" exit reason when routing nested exit KVM: MIPS: Define KVM_ENTRYHI_ASID to cpu_asid_mask(&boot_cpu_data) KVM: MIPS: Fix VPN2_MASK definition for variable cpu_vmbits KVM: arm64: Make vcpu_cp1x() work on Big Endian hosts scsi: megaraid_sas: TM command refire leads to controller firmware crash ath9k: Fix use-after-free Read in ath9k_wmi_ctrl_rx ath9k: Fix use-after-free Write in ath9k_htc_rx_msg ath9x: Fix stack-out-of-bounds Write in ath9k_hif_usb_rx_cb ath9k: Fix general protection fault in ath9k_hif_usb_rx_cb Smack: slab-out-of-bounds in vsscanf drm/vkms: Hold gem object while still in-use mm/slub: fix a memory leak in sysfs_slab_add() fat: don't allow to mount if the FAT length == 0 perf: Add cond_resched() to task_function_call() agp/intel: Reinforce the barrier after GTT updates mmc: sdhci-msm: Clear tuning done flag while hs400 tuning ARM: dts: at91: sama5d2_ptc_ek: fix sdmmc0 node description mmc: sdio: Fix potential NULL pointer error in mmc_sdio_init_card() xen/pvcalls-back: test for errors when calling backend_connect() KVM: arm64: Synchronize sysreg state on injecting an AArch32 exception ACPI: GED: use correct trigger type field in _Exx / _Lxx handling drm: bridge: adv7511: Extend list of audio sample rates crypto: ccp -- don't "select" CONFIG_DMADEVICES media: si2157: Better check for running tuner in init objtool: Ignore empty alternatives spi: pxa2xx: Apply CS clk quirk to BXT net: atlantic: make hw_get_regs optional net: ena: fix error returning in ena_com_get_hash_function() efi/libstub/x86: Work around LLVM ELF quirk build regression arm64: cacheflush: Fix KGDB trap detection spi: dw: Zero DMA Tx and Rx configurations on stack arm64: insn: Fix two bugs in encoding 32-bit logical immediates ixgbe: Fix XDP redirect on archs with PAGE_SIZE above 4K MIPS: Loongson: Build ATI Radeon GPU driver as module Bluetooth: Add SCO fallback for invalid LMP parameters error kgdb: Disable WARN_CONSOLE_UNLOCKED for all kgdb kgdb: Prevent infinite recursive entries to the debugger spi: dw: Enable interrupts in accordance with DMA xfer mode clocksource: dw_apb_timer: Make CPU-affiliation being optional clocksource: dw_apb_timer_of: Fix missing clockevent timers btrfs: do not ignore error from btrfs_next_leaf() when inserting checksums ARM: 8978/1: mm: make act_mm() respect THREAD_SIZE batman-adv: Revert "disable ethtool link speed detection when auto negotiation off" mmc: meson-mx-sdio: trigger a soft reset after a timeout or CRC error spi: dw: Fix Rx-only DMA transfers x86/kvm/hyper-v: Explicitly align hcall param for kvm_hyperv_exit net: vmxnet3: fix possible buffer overflow caused by bad DMA value in vmxnet3_get_rss() staging: android: ion: use vmap instead of vm_map_ram brcmfmac: fix wrong location to get firmware feature tools api fs: Make xxx__mountpoint() more scalable e1000: Distribute switch variables for initialization dt-bindings: display: mediatek: control dpi pins mode to avoid leakage audit: fix a net reference leak in audit_send_reply() media: dvb: return -EREMOTEIO on i2c transfer failure. media: platform: fcp: Set appropriate DMA parameters MIPS: Make sparse_init() using top-down allocation Bluetooth: btbcm: Add 2 missing models to subver tables audit: fix a net reference leak in audit_list_rules_send() netfilter: nft_nat: return EOPNOTSUPP if type or flags are not supported selftests/bpf: Fix memory leak in extract_build_id() net: bcmgenet: set Rx mode before starting netif lib/mpi: Fix 64-bit MIPS build with Clang exit: Move preemption fixup up, move blocking operations down sched/core: Fix illegal RCU from offline CPUs drivers/perf: hisi: Fix typo in events attribute array net: lpc-enet: fix error return code in lpc_mii_init() media: cec: silence shift wrapping warning in __cec_s_log_addrs() net: allwinner: Fix use correct return type for ndo_start_xmit() powerpc/spufs: fix copy_to_user while atomic xfs: clean up the error handling in xfs_swap_extents Crypto/chcr: fix for ccm(aes) failed test MIPS: Truncate link address into 32bit for 32bit kernel mips: cm: Fix an invalid error code of INTVN_*_ERR kgdb: Fix spurious true from in_dbg_master() xfs: reset buffer write failure state on successful completion xfs: fix duplicate verification from xfs_qm_dqflush() platform/x86: intel-vbtn: Use acpi_evaluate_integer() platform/x86: intel-vbtn: Split keymap into buttons and switches parts platform/x86: intel-vbtn: Do not advertise switches to userspace if they are not there platform/x86: intel-vbtn: Also handle tablet-mode switch on "Detachable" and "Portable" chassis-types nvme: refine the Qemu Identify CNS quirk ath10k: Remove msdu from idr when management pkt send fails wcn36xx: Fix error handling path in 'wcn36xx_probe()' net: qed*: Reduce RX and TX default ring count when running inside kdump kernel mt76: avoid rx reorder buffer overflow md: don't flush workqueue unconditionally in md_open veth: Adjust hard_start offset on redirect XDP frames net/mlx5e: IPoIB, Drop multicast packets that this interface sent rtlwifi: Fix a double free in _rtl_usb_tx_urb_setup() mwifiex: Fix memory corruption in dump_station x86/boot: Correct relocation destination on old linkers mips: MAAR: Use more precise address mask mips: Add udelay lpj numbers adjustment crypto: stm32/crc32 - fix ext4 chksum BUG_ON() crypto: stm32/crc32 - fix run-time self test issue. crypto: stm32/crc32 - fix multi-instance x86/mm: Stop printing BRK addresses m68k: mac: Don't call via_flush_cache() on Mac IIfx btrfs: qgroup: mark qgroup inconsistent if we're inherting snapshot to a new qgroup macvlan: Skip loopback packets in RX handler PCI: Don't disable decoding when mmio_always_on is set MIPS: Fix IRQ tracing when call handle_fpe() and handle_msa_fpe() bcache: fix refcount underflow in bcache_device_free() mmc: sdhci-msm: Set SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 quirk staging: greybus: sdio: Respect the cmd->busy_timeout from the mmc core mmc: via-sdmmc: Respect the cmd->busy_timeout from the mmc core ixgbe: fix signed-integer-overflow warning mmc: sdhci-esdhc-imx: fix the mask for tuning start point spi: dw: Return any value retrieved from the dma_transfer callback cpuidle: Fix three reference count leaks platform/x86: hp-wmi: Convert simple_strtoul() to kstrtou32() platform/x86: intel-hid: Add a quirk to support HP Spectre X2 (2015) platform/x86: intel-vbtn: Only blacklist SW_TABLET_MODE on the 9 / "Laptop" chasis-type string.h: fix incompatibility between FORTIFY_SOURCE and KASAN btrfs: include non-missing as a qualifier for the latest_bdev btrfs: send: emit file capabilities after chown mm: thp: make the THP mapcount atomic against __split_huge_pmd_locked() mm: initialize deferred pages with interrupts enabled ima: Fix ima digest hash table key calculation ima: Directly assign the ima_default_policy pointer to ima_rules evm: Fix possible memory leak in evm_calc_hmac_or_hash() ext4: fix EXT_MAX_EXTENT/INDEX to check for zeroed eh_max ext4: fix error pointer dereference ext4: fix race between ext4_sync_parent() and rename() PCI: Avoid Pericom USB controller OHCI/EHCI PME# defect PCI: Avoid FLR for AMD Matisse HD Audio & USB 3.0 PCI: Avoid FLR for AMD Starship USB 3.0 PCI: Add ACS quirk for iProc PAXB PCI: Add ACS quirk for Intel Root Complex Integrated Endpoints PCI: Remove unused NFP32xx IDs pci:ipmi: Move IPMI PCI class id defines to pci_ids.h hwmon/k10temp, x86/amd_nb: Consolidate shared device IDs x86/amd_nb: Add PCI device IDs for family 17h, model 30h PCI: add USR vendor id and use it in r8169 and w6692 driver PCI: Move Synopsys HAPS platform device IDs PCI: Move Rohm Vendor ID to generic list misc: pci_endpoint_test: Add the layerscape EP device support misc: pci_endpoint_test: Add support to test PCI EP in AM654x PCI: Add Synopsys endpoint EDDA Device ID PCI: Add NVIDIA GPU multi-function power dependencies PCI: Enable NVIDIA HDA controllers PCI: mediatek: Add controller support for MT7629 x86/amd_nb: Add PCI device IDs for family 17h, model 70h ALSA: lx6464es - add support for LX6464ESe pci express variant PCI: Add Genesys Logic, Inc. Vendor ID PCI: Add Amazon's Annapurna Labs vendor ID PCI: vmd: Add device id for VMD device 8086:9A0B x86/amd_nb: Add Family 19h PCI IDs PCI: Add Loongson vendor ID serial: 8250_pci: Move Pericom IDs to pci_ids.h PCI: Make ACS quirk implementations more uniform PCI: Unify ACS quirk desired vs provided checking PCI: Generalize multi-function power dependency device links btrfs: fix error handling when submitting direct I/O bio btrfs: fix wrong file range cleanup after an error filling dealloc range ima: Call ima_calc_boot_aggregate() in ima_eventdigest_init() PCI: Program MPS for RCiEP devices e1000e: Disable TSO for buffer overrun workaround e1000e: Relax condition to trigger reset for ME workaround carl9170: remove P2P_GO support media: go7007: fix a miss of snd_card_free Bluetooth: hci_bcm: fix freeing not-requested IRQ b43legacy: Fix case where channel status is corrupted b43: Fix connection problem with WPA3 b43_legacy: Fix connection problem with WPA3 media: ov5640: fix use of destroyed mutex igb: Report speed and duplex as unknown when device is runtime suspended power: vexpress: add suppress_bind_attrs to true pinctrl: samsung: Correct setting of eint wakeup mask on s5pv210 pinctrl: samsung: Save/restore eint_mask over suspend for EINT_TYPE GPIOs gnss: sirf: fix error return code in sirf_probe() sparc32: fix register window handling in genregs32_[gs]et() sparc64: fix misuses of access_process_vm() in genregs32_[sg]et() dm crypt: avoid truncating the logical block size alpha: fix memory barriers so that they conform to the specification kernel/cpu_pm: Fix uninitted local in cpu_pm ARM: tegra: Correct PL310 Auxiliary Control Register initialization ARM: dts: exynos: Fix GPIO polarity for thr GalaxyS3 CM36651 sensor's bus ARM: dts: at91: sama5d2_ptc_ek: fix vbus pin ARM: dts: s5pv210: Set keep-power-in-suspend for SDHCI1 on Aries drivers/macintosh: Fix memleak in windfarm_pm112 driver powerpc/64s: Don't let DT CPU features set FSCR_DSCR powerpc/64s: Save FSCR to init_task.thread.fscr after feature init kbuild: force to build vmlinux if CONFIG_MODVERSION=y sunrpc: svcauth_gss_register_pseudoflavor must reject duplicate registrations. sunrpc: clean up properly in gss_mech_unregister() mtd: rawnand: brcmnand: fix hamming oob layout mtd: rawnand: pasemi: Fix the probe error path w1: omap-hdq: cleanup to add missing newline for some dev_dbg perf probe: Do not show the skipped events perf probe: Fix to check blacklist address correctly perf probe: Check address correctness by map instead of _etext perf symbols: Fix debuginfo search for Ubuntu Linux 4.19.129 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I7b1108d90ee1109a28fe488a4358b7a3e101d9c9 |
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Christophe Leroy
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e18590b3e2 |
lib: Reduce user_access_begin() boundaries in strncpy_from_user() and strnlen_user()
commit ab10ae1c3bef56c29bac61e1201c752221b87b41 upstream.
The range passed to user_access_begin() by strncpy_from_user() and
strnlen_user() starts at 'src' and goes up to the limit of userspace
although reads will be limited by the 'count' param.
On 32 bits powerpc (book3s/32) access has to be granted for each
256Mbytes segment and the cost increases with the number of segments to
unlock.
Limit the range with 'count' param.
Fixes: 594cc251fdd0 ("make 'user_access_begin()' do 'access_ok()'")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Miles Chen <miles.chen@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Linus Torvalds
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216284c4a1 |
make 'user_access_begin()' do 'access_ok()'
commit 594cc251fdd0d231d342d88b2fdff4bc42fb0690 upstream. Originally, the rule used to be that you'd have to do access_ok() separately, and then user_access_begin() before actually doing the direct (optimized) user access. But experience has shown that people then decide not to do access_ok() at all, and instead rely on it being implied by other operations or similar. Which makes it very hard to verify that the access has actually been range-checked. If you use the unsafe direct user accesses, hardware features (either SMAP - Supervisor Mode Access Protection - on x86, or PAN - Privileged Access Never - on ARM) do force you to use user_access_begin(). But nothing really forces the range check. By putting the range check into user_access_begin(), we actually force people to do the right thing (tm), and the range check vill be visible near the actual accesses. We have way too long a history of people trying to avoid them. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Miles Chen <miles.chen@mediatek.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Andrey Konovalov
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f0526f4075 |
BACKPORT: lib: untag user pointers in strn*_user
Backport: drop sparc changes. (Upstream commit 903f433f8f7a33e292a319259483adece8cc6674). Patch series "arm64: untag user pointers passed to the kernel", v19. === Overview arm64 has a feature called Top Byte Ignore, which allows to embed pointer tags into the top byte of each pointer. Userspace programs (such as HWASan, a memory debugging tool [1]) might use this feature and pass tagged user pointers to the kernel through syscalls or other interfaces. Right now the kernel is already able to handle user faults with tagged pointers, due to these patches: 1. |
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Linus Torvalds
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ac351de9dd |
BACKPORT: make 'user_access_begin()' do 'access_ok()'
upstream commit 594cc251fdd0 ("make 'user_access_begin()' do 'access_ok()'")
Originally, the rule used to be that you'd have to do access_ok()
separately, and then user_access_begin() before actually doing the
direct (optimized) user access.
But experience has shown that people then decide not to do access_ok()
at all, and instead rely on it being implied by other operations or
similar. Which makes it very hard to verify that the access has
actually been range-checked.
If you use the unsafe direct user accesses, hardware features (either
SMAP - Supervisor Mode Access Protection - on x86, or PAN - Privileged
Access Never - on ARM) do force you to use user_access_begin(). But
nothing really forces the range check.
By putting the range check into user_access_begin(), we actually force
people to do the right thing (tm), and the range check vill be visible
near the actual accesses. We have way too long a history of people
trying to avoid them.
Bug: 135368228
Change-Id: I4ca0e4566ea080fa148c5e768bb1a0b6f7201c01
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Peter Zijlstra
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189b396a25 |
mm/uaccess: Use 'unsigned long' to placate UBSAN warnings on older GCC versions
[ Upstream commit 29da93fea3ea39ab9b12270cc6be1b70ef201c9e ] Randy reported objtool triggered on his (GCC-7.4) build: lib/strncpy_from_user.o: warning: objtool: strncpy_from_user()+0x315: call to __ubsan_handle_add_overflow() with UACCESS enabled lib/strnlen_user.o: warning: objtool: strnlen_user()+0x337: call to __ubsan_handle_sub_overflow() with UACCESS enabled This is due to UBSAN generating signed-overflow-UB warnings where it should not. Prior to GCC-8 UBSAN ignored -fwrapv (which the kernel uses through -fno-strict-overflow). Make the functions use 'unsigned long' throughout. Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: luto@kernel.org Link: http://lkml.kernel.org/r/20190424072208.754094071@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> |
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Greg Kroah-Hartman
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b24413180f |
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Al Viro
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8298525839 |
kill strlen_user()
no callers, no consistent semantics, no sane way to use it... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
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Linus Torvalds
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1bd4403d86 |
unsafe_[get|put]_user: change interface to use a error target label
When I initially added the unsafe_[get|put]_user() helpers in commit
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Linus Torvalds
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9fd4470ff4 |
Use the new batched user accesses in generic user string handling
This converts the generic user string functions to use the batched user access functions. It makes a big difference on Skylake, which is the first x86 microarchitecture to implement SMAP. The STAC/CLAC instructions are not very fast, and doing them for each access inside the loop that copies strings from user space (which is what the pathname handling does for every pathname the kernel uses, for example) is very inefficient. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
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23b7776290 |
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"The main changes are:
- lockless wakeup support for futexes and IPC message queues
(Davidlohr Bueso, Peter Zijlstra)
- Replace spinlocks with atomics in thread_group_cputimer(), to
improve scalability (Jason Low)
- NUMA balancing improvements (Rik van Riel)
- SCHED_DEADLINE improvements (Wanpeng Li)
- clean up and reorganize preemption helpers (Frederic Weisbecker)
- decouple page fault disabling machinery from the preemption
counter, to improve debuggability and robustness (David
Hildenbrand)
- SCHED_DEADLINE documentation updates (Luca Abeni)
- topology CPU masks cleanups (Bartosz Golaszewski)
- /proc/sched_debug improvements (Srikar Dronamraju)"
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (79 commits)
sched/deadline: Remove needless parameter in dl_runtime_exceeded()
sched: Remove superfluous resetting of the p->dl_throttled flag
sched/deadline: Drop duplicate init_sched_dl_class() declaration
sched/deadline: Reduce rq lock contention by eliminating locking of non-feasible target
sched/deadline: Make init_sched_dl_class() __init
sched/deadline: Optimize pull_dl_task()
sched/preempt: Add static_key() to preempt_notifiers
sched/preempt: Fix preempt notifiers documentation about hlist_del() within unsafe iteration
sched/stop_machine: Fix deadlock between multiple stop_two_cpus()
sched/debug: Add sum_sleep_runtime to /proc/<pid>/sched
sched/debug: Replace vruntime with wait_sum in /proc/sched_debug
sched/debug: Properly format runnable tasks in /proc/sched_debug
sched/numa: Only consider less busy nodes as numa balancing destinations
Revert
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Jan Kara
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226a07ef0a |
lib: Clarify the return value of strnlen_user()
strnlen_user() can return a number in a range 0 to count + sizeof(unsigned long) - 1. Clarify the comment at the top of the function so that users don't think the function returns at most count+1. Signed-off-by: Jan Kara <jack@suse.cz> [ Also added commentary about preferably not using this function ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Jan Kara
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f18c34e483 |
lib: Fix strnlen_user() to not touch memory after specified maximum
If the specified maximum length of the string is a multiple of unsigned long, we would load one long behind the specified maximum. If that happens to be in a next page, we can hit a page fault although we were not expected to. Fix the off-by-one bug in the test whether we are at the end of the specified range. Signed-off-by: Jan Kara <jack@suse.cz> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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David Hildenbrand
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b3c395ef55 |
mm/uaccess, mm/fault: Clarify that uaccess may only sleep if pagefaults are enabled
In general, non-atomic variants of user access functions must not sleep if pagefaults are disabled. Let's update all relevant comments in uaccess code. This also reflects the might_sleep() checks in might_fault(). Reviewed-and-tested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: David.Laight@ACULAB.COM Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: airlied@linux.ie Cc: akpm@linux-foundation.org Cc: benh@kernel.crashing.org Cc: bigeasy@linutronix.de Cc: borntraeger@de.ibm.com Cc: daniel.vetter@intel.com Cc: heiko.carstens@de.ibm.com Cc: herbert@gondor.apana.org.au Cc: hocko@suse.cz Cc: hughd@google.com Cc: mst@redhat.com Cc: paulus@samba.org Cc: ralf@linux-mips.org Cc: schwidefsky@de.ibm.com Cc: yang.shi@windriver.com Link: http://lkml.kernel.org/r/1431359540-32227-4-git-send-email-dahi@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Paul Mackerras
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69ea640598 |
lib: Fix generic strnlen_user for 32-bit big-endian machines
The aligned_byte_mask() definition is wrong for 32-bit big-endian machines: the "7-(n)" part of the definition assumes a long is 8 bytes. This fixes it by using BITS_PER_LONG - 8 instead of 8*7. Tested on 32-bit and 64-bit PowerPC. Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Linus Torvalds
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a08c5356a3 |
lib: add generic strnlen_user() function
This adds a new generic optimized strnlen_user() function that uses the <asm/word-at-a-time.h> infrastructure to portably do efficient string handling. In many ways, strnlen is much simpler than strncpy, and in particular we can always pre-align the words we load from memory. That means that all the worries about alignment etc are a non-issue, so this one can easily be used on any architecture. You obviously do have to do the appropriate word-at-a-time.h macros. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |