- Jan 23, 2018
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Kirill A. Shutemov authored
The new helper would check if the pfn belongs to the page. For huge pages it checks if the PFN is within range covered by the huge page. The helper is used in check_pte(). The original code the helper replaces had two call to page_to_pfn(). page_to_pfn() is relatively costly. Although current GCC is able to optimize code to have one call, it's better to do this explicitly. Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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- Jan 22, 2018
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Kirill A. Shutemov authored
Tetsuo reported random crashes under memory pressure on 32-bit x86 system and tracked down to change that introduced page_vma_mapped_walk(). The root cause of the issue is the faulty pointer math in check_pte(). As ->pte may point to an arbitrary page we have to check that they are belong to the section before doing math. Otherwise it may lead to weird results. It wasn't noticed until now as mem_map[] is virtually contiguous on flatmem or vmemmap sparsemem. Pointer arithmetic just works against all 'struct page' pointers. But with classic sparsemem, it doesn't because each section memap is allocated separately and so consecutive pfns crossing two sections might have struct pages at completely unrelated addresses. Let's restructure code a bit and replace pointer arithmetic with operations on pfns. Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reported-and-tested-by:
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Acked-by:
Michal Hocko <mhocko@suse.com> Fixes: ace71a19 ("mm: introduce page_vma_mapped_walk()") Cc: stable@vger.kernel.org Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 pti fixes from Thomas Gleixner: "A small set of fixes for the meltdown/spectre mitigations: - Make kprobes aware of retpolines to prevent probes in the retpoline thunks. - Make the machine check exception speculation protected. MCE used to issue an indirect call directly from the ASM entry code. Convert that to a direct call into a C-function and issue the indirect call from there so the compiler can add the retpoline protection, - Make the vmexit_fill_RSB() assembly less stupid - Fix a typo in the PTI documentation" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/retpoline: Optimize inline assembler for vmexit_fill_RSB x86/pti: Document fix wrong index kprobes/x86: Disable optimizing on the function jumps to indirect thunk kprobes/x86: Blacklist indirect thunk functions for kprobes retpoline: Introduce start/end markers of indirect thunk x86/mce: Make machine check speculation protected
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 kexec fix from Thomas Gleixner: "A single fix for the WBINVD issue introduced by the SME support which causes kexec fails on non AMD/SME capable CPUs. Issue WBINVD only when the CPU has SME and avoid doing so in a loop" [ Side note: this patch fixes the problem, but it isn't entirely clear why it is required. The wbinvd should just work regardless, but there seems to be some system - as opposed to CPU - issue, since the wbinvd causes more problems later in the shutdown sequence, but wbinvd instructions while the system is still active are not problematic. Possibly some SMI or pending machine check issue on the affected system ] * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm: Rework wbinvd, hlt operation in stop_this_cpu()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull irq fix from Thomas Gleixner: "A single fix for the new matrix allocator to prevent vector exhaustion by certain network drivers which allocate gazillions of unused vectors which cannot be put into reservation mode due to MSI and the lack of MSI entry masking. The fix/workaround is to spread the vectors across CPUs by searching the supplied target CPU mask for the CPU with the smallest number of allocated vectors" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irq/matrix: Spread interrupts on allocation
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- Jan 21, 2018
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git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alphaLinus Torvalds authored
Pull alpha fixes from Matt Turner: "A build fix and a regression fix" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha: alpha/PCI: Fix noname IRQ level detection alpha: extend memset16 to EV6 optimised routines
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Laura Abbott authored
Commit bacf6b49 ("x86/mm: Use a struct to reduce parameters for SME PGD mapping") moved some parameters into a structure. The structure was large enough to trigger the stack protection canary in sme_encrypt_kernel which doesn't work this early, causing reboots. Mark sme_encrypt_kernel appropriately to not use the canary. Fixes: bacf6b49 ("x86/mm: Use a struct to reduce parameters for SME PGD mapping") Signed-off-by:
Laura Abbott <labbott@redhat.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Lorenzo Pieralisi authored
The conversion of the alpha architecture PCI host bridge legacy IRQ mapping/swizzling to the new PCI host bridge map/swizzle hooks carried out through: commit 0e4c2eeb ("alpha/PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping hooks") implies that IRQ for devices are now allocated through pci_assign_irq() function in pci_device_probe() that is called when a driver matching a device is found in order to probe the device through the device driver. Alpha noname platforms required IRQ level programming to be executed in sio_fixup_irq_levels(), that is called in noname_init_pci(), a platform hook called within a subsys_initcall. In noname_init_pci(), present IRQs are detected through sio_collect_irq_levels() that check the struct pci_dev->irq number to detect if an IRQ has been allocated for the device. By the time sio_collect_irq_levels() is called, some devices may still have not a matching driver loaded to match them (eg loadable module) therefore their IRQ allocation is still pending - which means that sio_collect_irq_levels() does not programme the correct IRQ level for those devices, causing their IRQ handling to be broken when the device driver is actually loaded and the device is probed. Fix the issue by adding code in the noname map_irq() function (noname_map_irq()) that, whilst mapping/swizzling the IRQ line, it also ensures that the correct IRQ level programming is executed at platform level, fixing the issue. Fixes: 0e4c2eeb ("alpha/PCI: Replace pci_fixup_irqs() call with host bridge IRQ mapping hooks") Reported-by:
Mikulas Patocka <mpatocka@redhat.com> Signed-off-by:
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: stable@vger.kernel.org # 4.14 Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: Meelis Roos <mroos@linux.ee> Signed-off-by:
Matt Turner <mattst88@gmail.com>
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git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull KVM fixes from Radim Krčmář: "ARM: - fix incorrect huge page mappings on systems using the contiguous hint for hugetlbfs - support alternative GICv4 init sequence - correctly implement the ARM SMCC for HVC and SMC handling PPC: - add KVM IOCTL for reporting vulnerability and workaround status s390: - provide userspace interface for branch prediction changes in firmware x86: - use correct macros for bits" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: s390: wire up bpb feature KVM: PPC: Book3S: Provide information about hardware/firmware CVE workarounds KVM/x86: Fix wrong macro references of X86_CR0_PG_BIT and X86_CR4_PAE_BIT in kvm_valid_sregs() arm64: KVM: Fix SMCCC handling of unimplemented SMC/HVC calls KVM: arm64: Fix GICv4 init when called from vgic_its_create KVM: arm/arm64: Check pagesize when allocating a hugepage at Stage 2
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git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mipsLinus Torvalds authored
Pull MIPS fixes from James Hogan: "Some final MIPS fixes for 4.15, including important build fixes and a MAINTAINERS update: - Add myself as MIPS co-maintainer. - Fix various all*config build failures (particularly as a result of switching the default MIPS platform to the "generic" platform). - Fix GCC7 build failures (duplicate const and questionable calls to missing __multi3 intrinsic on mips64r6). - Fix warnings when CPU Idle is enabled (4.14). - Fix AR7 serial output (since 3.17). - Fix ralink platform_get_irq error checking (since 3.12)" * tag 'mips_fixes_4.15_2' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips: MAINTAINERS: Add James as MIPS co-maintainer MIPS: Fix undefined reference to physical_memsize MIPS: Implement __multi3 for GCC7 MIPS64r6 builds MIPS: mm: Fix duplicate "const" on insn_table_MM MIPS: CM: Drop WARN_ON(vp != 0) MIPS: ralink: Fix platform_get_irq's error checking MIPS: Fix CPS SMP NS16550 UART defaults MIPS: BCM47XX Avoid compile error with MIPS allnoconfig MIPS: RB532: Avoid undefined mac_pton without GENERIC_NET_UTILS MIPS: RB532: Avoid undefined early_serial_setup() without SERIAL_8250_CONSOLE MIPS: ath25: Avoid undefined early_serial_setup() without SERIAL_8250_CONSOLE MIPS: AR7: ensure the port type's FCR value is used
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Christian Borntraeger authored
The new firmware interfaces for branch prediction behaviour changes are transparently available for the guest. Nevertheless, there is new state attached that should be migrated and properly resetted. Provide a mechanism for handling reset, migration and VSIE. Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by:
David Hildenbrand <david@redhat.com> Reviewed-by:
Cornelia Huck <cohuck@redhat.com> [Changed capability number to 152. - Radim] Signed-off-by:
Radim Krčmář <rkrcmar@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcRadim Krčmář authored
Add PPC KVM ioctl to report vulnerability and workaround status to userspace.
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- Jan 20, 2018
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fix from James Bottomley: "One fix for SAS attached SATA CD-ROMs. It turns out that the libata handling of CD devices relies on the SCSI error handler, so disable async aborts (which don't start the error handler) for these devices" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: libsas: Disable asynchronous aborts for SATA devices
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Linus Torvalds authored
Merge tag 'for-4.15/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper fixes from Mike Snitzer: "All fixes marked for stable: - Fix DM thinp btree corruption seen when inserting a new key/value pair into a full root node. - Fix DM thinp btree removal deadlock due to artificially low number of allowed concurrent locks allowed. - Fix possible DM crypt corruption if kernel keyring service is used. Only affects ciphers using following IVs: essiv, lmk and tcw. - Two DM crypt device initialization error checking fixes. - Fix DM integrity to allow use of async ciphers that require DMA" * tag 'for-4.15/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm crypt: fix error return code in crypt_ctr() dm crypt: wipe kernel key copy after IV initialization dm integrity: don't store cipher request on the stack dm crypt: fix crash by adding missing check for auth key size dm btree: fix serious bug in btree_split_beneath() dm thin metadata: THIN_MAX_CONCURRENT_LOCKS should be 6
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-traceLinus Torvalds authored
Pull tracing fixes from Steven Rostedt: "Two more small fixes - The conversion of enums into their actual numbers to display in the event format file had an off-by-one bug, that could cause an enum not to be converted, and break user space parsing tools. - A fix to a previous fix to bring back the context recursion checks. The interrupt case checks for NMI, IRQ and softirq, but the softirq returned the same number regardless if it was set or not, although the logic would force it to be set if it were hit" * tag 'trace-v4.15-rc4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing: Fix converting enum's from the map in trace_event_eval_update() ring-buffer: Fix duplicate results in mapping context to bits in recursive lock
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/inputLinus Torvalds authored
Pull input fixes from Dmitry Torokhov: - a fix for use-after-free in Synaptics RMI4 driver - correction to multitouch contact tracking on certain ALPS touchpads (which got broken when we tried to fix the 2-finger scrolling) - touchpad on Lenovo T640p is switched over to SMbus/RMI - a few device node refcount fixes * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: synaptics-rmi4 - prevent UAF reported by KASAN Input: ALPS - fix multi-touch decoding on SS4 plus touchpads Input: synaptics - Lenovo Thinkpad T460p devices should use RMI Input: of_touchscreen - add MODULE_LICENSE Input: 88pm860x-ts - fix child-node lookup Input: twl6040-vibra - fix child-node lookup Input: twl4030-vibra - fix sibling-node lookup
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linuxLinus Torvalds authored
Pull i2c fixes from Wolfram Sang: "Two bugfixes for the I2C core: Lixing Wang fixed a refcounting problem with DT nodes. Jeremy Compostella fixed a buffer overflow possibility when using a 'don't use' ioctl interface directly" * 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: core-smbus: prevent stack corruption on read I2C_BLOCK_DATA i2c: core: decrease reference count of device node in i2c_unregister_device
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libataLinus Torvalds authored
Pull libata fixlet from Tejun Heo: "This just adds one more entry for liteon optical drives to the device blacklist for large IOs. The change is very low risk" * 'for-4.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: libata: apply MAX_SEC_1024 to all LITEON EP1 series devices
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroupLinus Torvalds authored
Pull cgroup fix from Tejun Heo: "cgroup.threads should be delegatable (ie. a container should be able to write to it from inside) but was missing the flag. The change is very low risk" * 'for-4.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: make cgroup.threads delegatable
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/wqLinus Torvalds authored
Pull workqueue fixlet from Tejun Heo: "One patch to add touch_nmi_watchdog() while dumping workqueue debug messages to avoid triggering the lockup detector spuriously. The change is very low risk" * 'for-4.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: avoid hard lockups in show_workqueue_state()
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull ARM SoC fixes from Arnd Bergmann: "We have various small DT fixes, and one important regression fix: The recent device tree bugfixes that were intended to address issues that 'dtc' started warning about in 4.15 fixed various USB PHY device nodes, but it turns out that we had code that depended on those nodes being incorrect and the probe failing with a particular error code. With the workaround we can also deal with correct device nodes. The DT fixes include: - Allwinner A10 and A20 had the display pipeline set up incorrectly (introduced in v4.15) - The Altera PMU lacked an interrupt-parent (never worked) - Pin muxing on the Openblocks A7 (never worked) - Clocks might get set up wrong on Armada 7K/8K (4.15 regression) We now have additional device tree patches to address all the remaining warnings introduced in 4.15, but decided to queue them for 4.16 instead, to avoid risking another regression like the USB PHY thing mentioned above. * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: phy: work around 'phys' references to usb-nop-xceiv devices ARM: sunxi_defconfig: Enable CMA arm64: dts: socfpga: add missing interrupt-parent ARM: dts: sun[47]i: Fix display backend 1 output to TCON0 remote endpoint ARM64: dts: marvell: armada-cp110: Fix clock resources for various node ARM: dts: da850-lcdk: Remove leading 0x and 0s from unit address ARM: dts: kirkwood: fix pin-muxing of MPP7 on OpenBlocks A7
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds authored
Pull powerpc fixes from Michael Ellerman: "More than we'd like after rc8, but nothing very alarming either, just tying up loose ends before the release: Since we changed powernv to use cpufreq_get() from show_cpuinfo(), we see warnings with PREEMPT enabled. But the preempt_disable() in show_cpuinfo() doesn't actually prevent CPU hotplug as it suggests, so remove it. Two updates to the recently merged RFI flush code. Wire up the generic sysfs file to report the status, and add a debugfs file to allow enabling/disabling it at runtime. Two updates to xmon, one to add the RFI flush related fields to the paca dump, and another to not use hashed pointers in the paca dump. And one minor fix to add a missing include of linux/types.h in asm/hvcall.h, not seen to break the build in upstream, but correct anyway. Thanks to: Benjamin Herrenschmidt, Michal Suchanek, Nicholas Piggin" * tag 'powerpc-4.15-8' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/pseries: include linux/types.h in asm/hvcall.h powerpc/64s: Allow control of RFI flush via debugfs powerpc/64s: Wire up cpu_show_meltdown() powerpc: Don't preempt_disable() in show_cpuinfo() powerpc/xmon: Don't print hashed pointers in paca dump powerpc/xmon: Add RFI flush related fields to paca dump
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git://people.freedesktop.org/~airlied/linuxLinus Torvalds authored
Pull drm fixes from Dave Airlie: "Nouveau, i915, vmwgfx and sun4i regression fixes. The i915 change fixes a display corruption problem introduced in 4.15, the nouveau changes are for regressions in 4.15, one of the vmwgfx fixes goes back a little further, the other is a 4.15 regression fix, the 3 sun4i changes fix blank HDMI output on those devices" * tag 'drm-fixes-for-v4.15-rc9' of git://people.freedesktop.org/~airlied/linux: drm/nouveau/mmu/mcp77: fix regressions in stolen memory handling drm/nouveau/bar/gk20a: Avoid bar teardown during init drm/nouveau/drm/nouveau: Pass the proper arguments to nvif_object_map_handle() drm/vmwgfx: fix memory corruption with legacy/sou connectors drm/vmwgfx: Fix a boot time warning drm/i915: Fix deadlock in i830_disable_pipe() drm/i915: Redo plane sanitation during readout drm/i915: Add .get_hw_state() method for planes drm/sun4i: hdmi: Add missing rate halving check in sun4i_tmds_determine_rate drm/sun4i: hdmi: Fix incorrect assignment in sun4i_tmds_determine_rate drm/sun4i: hdmi: Check for unset best_parent in sun4i_tmds_determine_rate
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Linus Torvalds authored
Merge misc fixes from Andrew Morton: "6 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: sparse doesn't support struct randomization proc: fix coredump vs read /proc/*/stat race scripts/gdb/linux/tasks.py: fix get_thread_info scripts/decodecode: fix decoding for AArch64 (arm64) instructions mm/page_owner.c: remove drain_all_pages from init_early_allocated_pages mm/memory.c: release locked page in do_swap_page()
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Matthew Wilcox authored
Force __builtin_constant_p to evaluate whether the argument to atomic_add & atomic_sub is constant in the front-end before optimisations which can lead GCC to output a call to __bad_increment_for_ia64_fetch_and_add(). See GCC bugzilla 83653. Signed-off-by:
Jakub Jelinek <jakub@redhat.com> Signed-off-by:
Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by:
Tony Luck <tony.luck@intel.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Matthew Wilcox authored
Without this patch, I drown in a sea of unknown attribute warnings Link: http://lkml.kernel.org/r/20180117024539.27354-1-willy@infradead.org Signed-off-by:
Matthew Wilcox <mawilcox@microsoft.com> Acked-by:
Kees Cook <keescook@chromium.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Alexey Dobriyan authored
do_task_stat() accesses IP and SP of a task without bumping reference count of a stack (which became an entity with independent lifetime at some point). Steps to reproduce: #include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/time.h> #include <sys/resource.h> #include <unistd.h> #include <sys/wait.h> int main(void) { setrlimit(RLIMIT_CORE, &(struct rlimit){}); while (1) { char buf[64]; char buf2[4096]; pid_t pid; int fd; pid = fork(); if (pid == 0) { *(volatile int *)0 = 0; } snprintf(buf, sizeof(buf), "/proc/%u/stat", pid); fd = open(buf, O_RDONLY); read(fd, buf2, sizeof(buf2)); close(fd); waitpid(pid, NULL, 0); } return 0; } BUG: unable to handle kernel paging request at 0000000000003fd8 IP: do_task_stat+0x8b4/0xaf0 PGD 800000003d73e067 P4D 800000003d73e067 PUD 3d558067 PMD 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 0 PID: 1417 Comm: a.out Not tainted 4.15.0-rc8-dirty #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1.fc27 04/01/2014 RIP: 0010:do_task_stat+0x8b4/0xaf0 Call Trace: proc_single_show+0x43/0x70 seq_read+0xe6/0x3b0 __vfs_read+0x1e/0x120 vfs_read+0x84/0x110 SyS_read+0x3d/0xa0 entry_SYSCALL_64_fastpath+0x13/0x6c RIP: 0033:0x7f4d7928cba0 RSP: 002b:00007ffddb245158 EFLAGS: 00000246 Code: 03 b7 a0 01 00 00 4c 8b 4c 24 70 4c 8b 44 24 78 4c 89 74 24 18 e9 91 f9 ff ff f6 45 4d 02 0f 84 fd f7 ff ff 48 8b 45 40 48 89 ef <48> 8b 80 d8 3f 00 00 48 89 44 24 20 e8 9b 97 eb ff 48 89 44 24 RIP: do_task_stat+0x8b4/0xaf0 RSP: ffffc90000607cc8 CR2: 0000000000003fd8 John Ogness said: for my tests I added an else case to verify that the race is hit and correctly mitigated. Link: http://lkml.kernel.org/r/20180116175054.GA11513@avx2 Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Reported-by:
"Kohli, Gaurav" <gkohli@codeaurora.org> Tested-by:
John Ogness <john.ogness@linutronix.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ingo Molnar <mingo@elte.hu> Cc: Oleg Nesterov <oleg@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Xi Kangjie authored
Since kernel 4.9, the thread_info has been moved into task_struct, no longer locates at the bottom of kernel stack. See commits c65eacbe ("sched/core: Allow putting thread_info into task_struct") and 15f4eae7 ("x86: Move thread_info into task_struct"). Before fix: (gdb) set $current = $lx_current() (gdb) p $lx_thread_info($current) $1 = {flags = 1470918301} (gdb) p $current.thread_info $2 = {flags = 2147483648} After fix: (gdb) p $lx_thread_info($current) $1 = {flags = 2147483648} (gdb) p $current.thread_info $2 = {flags = 2147483648} Link: http://lkml.kernel.org/r/20180118210159.17223-1-imxikangjie@gmail.com Fixes: 15f4eae7 ("x86: Move thread_info into task_struct") Signed-off-by:
Xi Kangjie <imxikangjie@gmail.com> Acked-by:
Jan Kiszka <jan.kiszka@siemens.com> Acked-by:
Kieran Bingham <kbingham@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <to...
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Will Deacon authored
There are a couple of problems with the decodecode script and arm64: 1. AArch64 objdump refuses to disassemble .4byte directives as instructions, insisting that they are data values and displaying them as: a94153f3 .word 0xa94153f3 <-- trapping instruction This is resolved by using the .inst directive instead. 2. Disassembly of branch instructions attempts to provide the target as an offset from a symbol, e.g.: 0: 34000082 cbz w2, 10 <.text+0x10> however this falls foul of the grep -v, which matches lines containing ".text" and ends up removing all branch instructions from the dump. This patch resolves both issues by using the .inst directive for 4-byte quantities on arm64 and stripping the resulting binaries (as is done on arm already) to remove the mapping symbols. Link: http://lkml.kernel.org/r/1506596147-23630-1-git-send-email-will.deacon@arm.com Signed-off-by:
Will Deacon <will.deacon@arm.com> Reviewed-by:
Dave Martin <Dave.Martin@arm.com> Cc: Michal Marek <mmarek@suse.cz> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Oscar Salvador authored
When setting page_owner = on, the following warning can be seen in the boot log: WARNING: CPU: 0 PID: 0 at mm/page_alloc.c:2537 drain_all_pages+0x171/0x1a0 Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.15.0-rc7-next-20180109-1-default+ #7 Hardware name: Dell Inc. Latitude E7470/0T6HHJ, BIOS 1.11.3 11/09/2016 RIP: 0010:drain_all_pages+0x171/0x1a0 Call Trace: init_page_owner+0x4e/0x260 start_kernel+0x3e6/0x4a6 ? set_init_arg+0x55/0x55 secondary_startup_64+0xa5/0xb0 Code: c5 ed ff 89 df 48 c7 c6 20 3b 71 82 e8 f9 4b 52 00 3b 05 d7 0b f8 00 89 c3 72 d5 5b 5d 41 5 This warning is shown because we are calling drain_all_pages() in init_early_allocated_pages(), but mm_percpu_wq is not up yet, it is being set up later on in kernel_init_freeable() -> init_mm_internals(). Link: http://lkml.kernel.org/r/20180109153921.GA13070@techadventures.net Signed-off-by:
Oscar Salvador <osalvador@techadventures.net> Acked-by:
Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Michal Hocko <mhocko@suse.com> Cc: Ayush Mittal <ayush.m@samsung.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Minchan Kim authored
James reported a bug in swap paging-in from his testing. It is that do_swap_page doesn't release locked page so system hang-up happens due to a deadlock on PG_locked. It was introduced by 0bcac06f ("mm, swap: skip swapcache for swapin of synchronous device") because I missed swap cache hit places to update swapcache variable to work well with other logics against swapcache in do_swap_page. This patch fixes it. Debugged by James Bottomley. Link: http://lkml.kernel.org/r/<1514407817.4169.4.camel@HansenPartnership.com> Link: http://lkml.kernel.org/r/20180102235606.GA19438@bbox Signed-off-by:
Minchan Kim <minchan@kernel.org> Reported-by:
James Bottomley <James.Bottomley@hansenpartnership.com> Acked-by:
Hugh Dickins <hughd@google.com> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Huang Ying <ying.huang@intel.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds authored
Pull networking fixes from David Miller: 1) Fix BPF divides by zero, from Eric Dumazet and Alexei Starovoitov. 2) Reject stores into bpf context via st and xadd, from Daniel Borkmann. 3) Fix a memory leak in TUN, from Cong Wang. 4) Disable RX aggregation on a specific troublesome configuration of r8152 in a Dell TB16b dock. 5) Fix sw_ctx leak in tls, from Sabrina Dubroca. 6) Fix program replacement in cls_bpf, from Daniel Borkmann. 7) Fix uninitialized station_info structures in cfg80211, from Johannes Berg. 8) Fix miscalculation of transport header offset field in flow dissector, from Eric Dumazet. 9) Fix LPM tree leak on failure in mlxsw driver, from Ido Schimmel. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (29 commits) ibmvnic: Fix IPv6 packet descriptors ibmvnic: Fix IP offload control buffer ipv6: don't let tb6_root node share routes with other node ip6_gre: init dev->mtu and dev->hard_header_len correctly mlxsw: spectrum_router: Free LPM tree upon failure flow_dissector: properly cap thoff field fm10k: mark PM functions as __maybe_unused cfg80211: fix station info handling bugs netlink: reset extack earlier in netlink_rcv_skb can: af_can: canfd_rcv(): replace WARN_ONCE by pr_warn_once can: af_can: can_rcv(): replace WARN_ONCE by pr_warn_once bpf: mark dst unknown on inconsistent {s, u}bounds adjustments bpf: fix cls_bpf on filter replace Net: ethernet: ti: netcp: Fix inbound ping crash if MTU size is greater than 1500 tls: reset crypto_info when do_tls_setsockopt_tx fails tls: return -EBUSY if crypto_info is already set tls: fix sw_ctx leak net/tls: Only attach to sockets in ESTABLISHED state net: fs_enet: do not call phy_stop() in interrupts r8152: disable RX aggregation on Dell TB16 dock ...
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- Jan 19, 2018
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Andi Kleen authored
The generated assembler for the C fill RSB inline asm operations has several issues: - The C code sets up the loop register, which is then immediately overwritten in __FILL_RETURN_BUFFER with the same value again. - The C code also passes in the iteration count in another register, which is not used at all. Remove these two unnecessary operations. Just rely on the single constant passed to the macro for the iterations. Signed-off-by:
Andi Kleen <ak@linux.intel.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Acked-by:
David Woodhouse <dwmw@amazon.co.uk> Cc: dave.hansen@intel.com Cc: gregkh@linuxfoundation.org Cc: torvalds@linux-foundation.org Cc: arjan@linux.intel.com Link: https://lkml.kernel.org/r/20180117225328.15414-1-andi@firstfloor.org
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zhenwei.pi authored
In section <2. Runtime Cost>, fix wrong index. Signed-off-by:
zhenwei.pi <zhenwei.pi@youruncloud.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: dave.hansen@linux.intel.com Link: https://lkml.kernel.org/r/1516237492-27739-1-git-send-email-zhenwei.pi@youruncloud.com
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Masami Hiramatsu authored
Since indirect jump instructions will be replaced by jump to __x86_indirect_thunk_*, those jmp instruction must be treated as an indirect jump. Since optprobe prohibits to optimize probes in the function which uses an indirect jump, it also needs to find out the function which jump to __x86_indirect_thunk_* and disable optimization. Add a check that the jump target address is between the __indirect_thunk_start/end when optimizing kprobe. Signed-off-by:
Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Acked-by:
David Woodhouse <dwmw@amazon.co.uk> Cc: Andi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Greg Kroah-Hartman <gregkh@linux-foundation.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/151629212062.10241.6991266100233002273.stgit@devbox
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Masami Hiramatsu authored
Mark __x86_indirect_thunk_* functions as blacklist for kprobes because those functions can be called from anywhere in the kernel including blacklist functions of kprobes. Signed-off-by:
Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Acked-by:
David Woodhouse <dwmw@amazon.co.uk> Cc: Andi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Greg Kroah-Hartman <gregkh@linux-foundation.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/151629209111.10241.5444852823378068683.stgit@devbox
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Masami Hiramatsu authored
Introduce start/end markers of __x86_indirect_thunk_* functions. To make it easy, consolidate .text.__x86.indirect_thunk.* sections to one .text.__x86.indirect_thunk section and put it in the end of kernel text section and adds __indirect_thunk_start/end so that other subsystem (e.g. kprobes) can identify it. Signed-off-by:
Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Acked-by:
David Woodhouse <dwmw@amazon.co.uk> Cc: Andi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Greg Kroah-Hartman <gregkh@linux-foundation.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/151629206178.10241.6828804696410044771.stgit@devbox
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Thomas Gleixner authored
The machine check idtentry uses an indirect branch directly from the low level code. This evades the speculation protection. Replace it by a direct call into C code and issue the indirect call there so the compiler can apply the proper speculation protection. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Reviewed-by:
Borislav Petkov <bp@alien8.de> Reviewed-by:
David Woodhouse <dwmw@amazon.co.uk> Niced-by:
Peter Zijlstra <peterz@infradead.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801181626290.1847@nanos
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Arnd Bergmann authored
Stefan Wahren reports a problem with a warning fix that was merged for v4.15: we had lots of device nodes with a 'phys' property pointing to a device node that is not compliant with the binding documented in Documentation/devicetree/bindings/phy/phy-bindings.txt This generally works because USB HCD drivers that support both the generic phy subsystem and the older usb-phy subsystem ignore most errors from phy_get() and related calls and then use the usb-phy driver instead. However, it turns out that making the usb-nop-xceiv device compatible with the generic-phy binding changes the phy_get() return code from -EINVAL to -EPROBE_DEFER, and the dwc2 usb controller driver for bcm2835 now returns -EPROBE_DEFER from its probe function rather than ignoring the failure, breaking all USB support on raspberry-pi when CONFIG_GENERIC_PHY is enabled. The same code is used in the dwc3 driver and the usb_add_hcd() function, so a reasonable assumption would be that many other platforms are affected as well. I have reviewed all the related patches and concluded that "usb-nop-xceiv" is the only USB phy that is affected by the change, and since it is by far the most commonly referenced phy, all the other USB phy drivers appear to be used in ways that are are either safe in DT (they don't use the 'phys' property), or in the driver (they already ignore -EPROBE_DEFER from generic-phy when usb-phy is available). To work around the problem, this adds a special case to _of_phy_get() so we ignore any PHY node that is compatible with "usb-nop-xceiv", as we know that this can never load no matter how much we defer. In the future, we might implement a generic-phy driver for "usb-nop-xceiv" and then remove this workaround. Since we generally want older kernels to also want to work with the fixed devicetree files, it would be good to backport the patch into stable kernels as well (3.13+ are possibly affected), even though they don't contain any of the patches that may have caused regressions. Fixes: 014d6da6 ARM: dts: bcm283x: Fix DTC warnings about missing phy-cells Fixes: c5bbf358 arm: dts: nspire: Add missing #phy-cells to usb-nop-xceiv Fixes: 44e5dced arm: dts: marvell: Add missing #phy-cells to usb-nop-xceiv Fixes: f568f6f5 ARM: dts: omap: Add missing #phy-cells to usb-nop-xceiv Fixes: d745d5f2 ARM: dts: imx51-zii-rdu1: Add missing #phy-cells to usb-nop-xceiv Fixes: 915fbe59 ARM: dts: imx: Add missing #phy-cells to usb-nop-xceiv Link: https://marc.info/?l=linux-usb&m=151518314314753&w=2 Link: https://patchwork.kernel.org/patch/10158145/ Cc: stable@vger.kernel.org Cc: Felipe Balbi <balbi@kernel.org> Cc: Eric Anholt <eric@anholt.net> Tested-by:
Stefan Wahren <stefan.wahren@i2se.com> Acked-by:
Rob Herring <robh@kernel.org> Tested-by:
Hans Verkuil <hans.verkuil@cisco.com> Acked-by:
Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by:
Arnd Bergmann <arnd@arndb.de>
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