- 16 Oct, 2016 26 commits
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Grzegorz Jaszczyk authored
commit 061492cf upstream. The armada-390.dtsi was broken since the first patch which adds Device Tree files for Armada 39x SoC was introduced. Signed-off-by:
Grzegorz Jaszczyk <jaz@semihalf.com> Acked-by:
Gregory CLEMENT <gregory.clement@free-electrons.com> Fixes 538da83d ("ARM: mvebu: add Device Tree files for Armada 39x SoC and board") Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Josh Poimboeuf authored
commit 72b4f6a5 upstream. On x86_32, when an interrupt happens from kernel space, SS and SP aren't pushed and the existing stack is used. So pt_regs is effectively two words shorter, and the previous stack pointer is normally the memory after the shortened pt_regs, aka '®s->sp'. But in the rare case where the interrupt hits right after the stack pointer has been changed to point to an empty stack, like for example when call_on_stack() is used, the address immediately after the shortened pt_regs is no longer on the stack. In that case, instead of '®s->sp', the previous stack pointer should be retrieved from the beginning of the current stack page. kernel_stack_pointer() wants to do that, but it forgets to dereference the pointer. So instead of returning a pointer to the previous stack, it returns a pointer to the beginning of the current stack. Note that it's probably outside of kernel_stack_pointer()'s scope to be switching stacks at all. The x86_64 version of this function doesn't do it, and it would be better for the caller to do it if necessary. But that's a patch for another day. This just fixes the original intent. Signed-off-by:
Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Byungchul Park <byungchul.park@lge.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nilay Vaish <nilayvaish@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 0788aa6a ("x86: Prepare removal of previous_esp from i386 thread_info structure") Link: http://lkml.kernel.org/r/472453d6e9f6a2d4ab16aaed4935f43117111566.1471535549.git.jpoimboe@redhat.comSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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Nicolas Iooss authored
commit ba6d018e upstream. __show_regs() fails to dump the PKRU state when the debug registers are in their default state because there is a return statement on the debug register state. Change the logic to report PKRU value even when debug registers are in their default state. Fixes:c0b17b5b ("x86/mm/pkeys: Dump PKRU with other kernel registers") Signed-off-by:
Nicolas Iooss <nicolas.iooss_linux@m4x.org> Acked-by:
Dave Hansen <dave.hansen@linux.intel.com> Link: http://lkml.kernel.org/r/20160910183045.4618-1-nicolas.iooss_linux@m4x.orgSigned-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Prarit Bhargava authored
commit 2a51fe08 upstream. When a CPU is physically added to a system then the MADT table is not updated. If subsequently a kdump kernel is started on that physically added CPU then the ACPI enumeration fails to provide the information for this CPU which is now the boot CPU of the kdump kernel. As a consequence, generic_processor_info() is not invoked for that CPU so the number of enumerated processors is 0 and none of the initializations, including the logical package id management, are performed. We have code which relies on the correctness of the logical package map and other information which is initialized via generic_processor_info(). Executing such code will result in undefined behaviour or kernel crashes. This problem applies only to the kdump kernel because a normal kexec will switch to the original boot CPU, which is enumerated in MADT, before jumping into the kexec kernel. The boot code already has a check for num_processors equal 0 in prefill_possible_map(). We can use that check as an indicator that the enumeration of the boot CPU did not happen and invoke generic_processor_info() for it. That initializes the relevant data for the boot CPU and therefore prevents subsequent failure. [ tglx: Refined the code and rewrote the changelog ] Signed-off-by:
Prarit Bhargava <prarit@redhat.com> Fixes: 1f12e32f ("x86/topology: Create logical package id") Cc: Peter Zijlstra <peterz@infradead.org> Cc: Len Brown <len.brown@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: dyoung@redhat.com Cc: Eric Biederman <ebiederm@xmission.com> Cc: kexec@lists.infradead.org Link: http://lkml.kernel.org/r/1475514432-27682-1-git-send-email-prarit@redhat.comSigned-off-by:
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Denys Vlasenko authored
commit cff9ab2b upstream. The array has a size of MAX_LOCAL_APIC, which can be as large as 32k, so it can consume up to 128k. The array has been there forever and was never used for anything useful other than a version mismatch check which was introduced in 2009. There is no reason to store the version in an array. The kernel is not prepared to handle different APIC versions anyway, so the real important part is to detect a version mismatch and warn about it, which can be done with a single variable as well. [ tglx: Massaged changelog ] Signed-off-by:
Denys Vlasenko <dvlasenk@redhat.com> CC: Andy Lutomirski <luto@amacapital.net> CC: Borislav Petkov <bp@alien8.de> CC: Brian Gerst <brgerst@gmail.com> CC: Mike Travis <travis@sgi.com> Link: http://lkml.kernel.org/r/20160913181232.30815-1-dvlasenk@redhat.comSigned-off-by:
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Dave Hansen authored
commit d4b05923 upstream. Our XSAVE features are divided into two categories: those that generate FPU exceptions, and those that do not. MPX and pkeys do not generate FPU exceptions and thus can not be used lazily. We disable them when lazy mode is forced on. We have a pair of masks to collect these two sets of features, but XFEATURE_MASK_PKRU was added to the wrong mask: XFEATURE_MASK_LAZY. Fix it by moving the feature to XFEATURE_MASK_EAGER. Note: this only causes problem if you boot with lazy FPU mode (eagerfpu=off) which is *not* the default. It also only affects hardware which is not currently publicly available. It looks like eager mode is going away, but we still need this patch applied to any kernel that has protection keys and lazy mode, which is 4.6 through 4.8 at this point, and 4.9 if the lazy removal isn't sent to Linus for 4.9. Fixes: c8df4009 ("x86/fpu, x86/mm/pkeys: Add PKRU xsave fields and data structures") Signed-off-by:
Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave@sr71.net> Link: http://lkml.kernel.org/r/20161007162342.28A49813@viggo.jf.intel.comSigned-off-by:
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Mika Westerberg authored
commit db91aa79 upstream. When a CPU is about to be offlined we call fixup_irqs() that resets IRQ affinities related to the CPU in question. The same thing is also done when the system is suspended to S-states like S3 (mem). For each IRQ we try to complete any on-going move regardless whether the IRQ is actually part of x86_vector_domain. For each IRQ descriptor we fetch its chip_data, assume it is of type struct apic_chip_data and manipulate it by clearing old_domain mask etc. For irq_chips that are not part of the x86_vector_domain, like those created by various GPIO drivers, will find their chip_data being changed unexpectly. Below is an example where GPIO chip owned by pinctrl-sunrisepoint.c gets corrupted after resume: # cat /sys/kernel/debug/gpio gpiochip0: GPIOs 360-511, parent: platform/INT344B:00, INT344B:00: gpio-511 ( |sysfs ) in hi # rtcwake -s10 -mmem <10 seconds passes> # cat /sys/kernel/debug/gpio gpiochip0: GPIOs 360-511, parent: platform/INT344B:00, INT344B:00: gpio-511 ( |sysfs ) in ? Note '?' in the output. It means the struct gpio_chip ->get function is NULL whereas before suspend it was there. Fix this by first checking that the IRQ belongs to x86_vector_domain before we try to use the chip_data as struct apic_chip_data. Reported-and-tested-by:
Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by:
Mika Westerberg <mika.westerberg@linux.intel.com> Link: http://lkml.kernel.org/r/20161003101708.34795-1-mika.westerberg@linux.intel.comSigned-off-by:
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Dan Williams authored
commit 917db484 upstream. In commit: ec776ef6 ("x86/mm: Add support for the non-standard protected e820 type") Christoph references the original patch I wrote implementing pmem support. The intent of the 'max_pfn' changes in that commit were to enable persistent memory ranges to be covered by the struct page memmap by default. However, that approach was abandoned when Christoph ported the patches [1], and that functionality has since been replaced by devm_memremap_pages(). In the meantime, this max_pfn manipulation is confusing kdump [2] that assumes that everything covered by the max_pfn is "System RAM". This results in kdump hanging or crashing. [1]: https://lists.01.org/pipermail/linux-nvdimm/2015-March/000348.html [2]: https://bugzilla.redhat.com/show_bug.cgi?id=1351098 So fix it. Reported-by:
Zhang Yi <yizhan@redhat.com> Reported-by:
Jeff Moyer <jmoyer@redhat.com> Tested-by:
Dan Williams <dan.j.williams@intel.com> Reviewed-by:
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Mark Rutland authored
commit b5e7307d upstream. In some places, dump_backtrace() is called with a NULL tsk parameter, e.g. in bug_handler() in arch/arm64, or indirectly via show_stack() in core code. The expectation is that this is treated as if current were passed instead of NULL. Similar is true of unwind_frame(). Commit a80a0eb7 ("arm64: make irq_stack_ptr more robust") didn't take this into account. In dump_backtrace() it compares tsk against current *before* we check if tsk is NULL, and in unwind_frame() we never set tsk if it is NULL. Due to this, we won't initialise irq_stack_ptr in either function. In dump_backtrace() this results in calling dump_mem() for memory immediately above the IRQ stack range, rather than for the relevant range on the task stack. In unwind_frame we'll reject unwinding frames on the IRQ stack. In either case this results in incomplete or misleading backtrace information, but is not otherwise problematic. The initial percpu areas (including the IRQ stacks) are allocated in the linear map, and dump_mem uses __get_user(), so we shouldn't access anything with side-effects, and will handle holes safely. This patch fixes the issue by having both functions handle the NULL tsk case before doing anything else with tsk. Signed-off-by:
Mark Rutland <mark.rutland@arm.com> Fixes: a80a0eb7 ("arm64: make irq_stack_ptr more robust") Acked-by:
James Morse <james.morse@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Yang Shi <yang.shi@linaro.org> Signed-off-by:
Will Deacon <will.deacon@arm.com> Signed-off-by:
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Dan Carpenter authored
commit ac0e89bb upstream. We use logical negate where bitwise negate was intended. It means that we never return -EINVAL here. Fixes: ce11e48b ('KVM: PPC: E500: Add userspace debug stub support') Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by:
Alexander Graf <agraf@suse.de> Signed-off-by:
Paul Mackerras <paulus@ozlabs.org> Signed-off-by:
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Christoffer Dall authored
commit 0099b770 upstream. If the vgic hasn't been created and initialized, we shouldn't attempt to look at its data structures or flush/sync anything to the GIC hardware. This fixes an issue reported by Alexander Graf when using a userspace irqchip. Fixes: 0919e84c ("KVM: arm/arm64: vgic-new: Add IRQ sync/flush framework") Reported-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by:
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Christoffer Dall authored
commit 6fe407f2 upstream. If userspace creates a PMU for the VCPU, but doesn't create an in-kernel irqchip, then we end up in a nasty path where we try to take an uninitialized spinlock, which can lead to all sorts of breakages. Luckily, QEMU always creates the VGIC before the PMU, so we can establish this as ABI and check for the VGIC in the PMU init stage. This can be relaxed at a later time if we want to support PMU with a userspace irqchip. Cc: Shannon Zhao <shannon.zhao@linaro.org> Acked-by:
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James Hogan authored
commit 91e4f1b6 upstream. When a guest TLB entry is replaced by TLBWI or TLBWR, we only invalidate TLB entries on the local CPU. This doesn't work correctly on an SMP host when the guest is migrated to a different physical CPU, as it could pick up stale TLB mappings from the last time the vCPU ran on that physical CPU. Therefore invalidate both user and kernel host ASIDs on other CPUs, which will cause new ASIDs to be generated when it next runs on those CPUs. We're careful only to do this if the TLB entry was already valid, and only for the kernel ASID where the virtual address it mapped is outside of the guest user address range. Signed-off-by:
James Hogan <james.hogan@imgtec.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Radim Krčmář" <rkrcmar@redhat.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Signed-off-by:
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Thomas Huth authored
commit fa73c3b2 upstream. The MMCR2 register is available twice, one time with number 785 (privileged access), and one time with number 769 (unprivileged, but it can be disabled completely). In former times, the Linux kernel was using the unprivileged register 769 only, but since commit 8dd75ccb ("powerpc: Use privileged SPR number for MMCR2"), it uses the privileged register 785 instead. The KVM-PR code then of course also switched to use the SPR 785, but this is causing older guest kernels to crash, since these kernels still access 769 instead. So to support older kernels with KVM-PR again, we have to support register 769 in KVM-PR, too. Fixes: 8dd75ccbSigned-off-by:
Thomas Huth <thuth@redhat.com> Signed-off-by:
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Boris Ostrovsky authored
commit a6a198bc upstream. Early during boot topology_update_package_map() computes logical_pkg_ids for all present processors. Later, when processors are brought up, identify_cpu() updates these values based on phys_pkg_id which is a function of initial_apicid. On PV guests the latter may point to a non-existing node, causing logical_pkg_ids to be set to -1. Intel's RAPL uses logical_pkg_id (as topology_logical_package_id()) to index its arrays and therefore in this case will point to index 65535 (since logical_pkg_id is a u16). This could lead to either a crash or may actually access random memory location. As a workaround, we recompute topology during CPU bringup to reset logical_pkg_id to a valid value. (The reason for initial_apicid being bogus is because it is initial_apicid of the processor from which the guest is launched. This value is CPUID(1).EBX[31:24]) Signed-off-by:
Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by:
David Vrabel <david.vrabel@citrix.com> Signed-off-by:
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Uwe Kleine-König authored
commit 88003fb1 upstream. This fixes a compile failure: drivers/built-in.o: In function `wm8350_i2c_probe': core.c:(.text+0x828b0): undefined reference to `__devm_regmap_init_i2c' Makefile:953: recipe for target 'vmlinux' failed Fixes: 52b461b8 ("mfd: Add regmap cache support for wm8350") Signed-off-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by:
Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by:
Lee Jones <lee.jones@linaro.org> Signed-off-by:
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Dan Carpenter authored
commit 9a6dc644 upstream. set_bit() and clear_bit() take the bit number so this code is really doing "1 << (1 << irq)" which is a double shift bug. It's done consistently so it won't cause a problem unless "irq" is more than 4. Fixes: 70c6cce0 ('mfd: Support 88pm80x in 80x driver') Signed-off-by:
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Boris Brezillon authored
commit 2c2469bc upstream. readl_poll_timeout() calls usleep_range(), but regmap_atmel_hlcdc_reg_write() is called in atomic context (regmap spinlock held). Replace the readl_poll_timeout() call by readl_poll_timeout_atomic(). Fixes: ea31c0cf ("mfd: atmel-hlcdc: Implement config synchronization") Signed-off-by:
Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by:
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Lu Baolu authored
commit 8dcc5ff8 upstream. Member "status" of struct usb_sg_request is managed by usb core. A spin lock is used to serialize the change of it. The driver could check the value of req->status, but should avoid changing it without the hold of the spinlock. Otherwise, it could cause race or error in usb core. This patch could be backported to stable kernels with version later than v3.14. Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Roger Tseng <rogerable@realtek.com> Signed-off-by:
Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by:
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Takashi Sakamoto authored
commit 8da08ca0 upstream. Currently, usb-line6 module exports an array of MIDI manufacturer ID and usb-pod module uses it. However, the declaration is not the definition in common header. The difference is explicit length of array. Although compiler calculates it and everything goes well, it's better to use the same representation between definition and declaration. This commit fills the length of array for usb-line6 module. As a small good sub-effect, this commit suppress below warnings from static analysis by sparse v0.5.0. sound/usb/line6/driver.c:274:43: error: cannot size expression sound/usb/line6/driver.c:275:16: error: cannot size expression sound/usb/line6/driver.c:276:16: error: cannot size expression sound/usb/line6/driver.c:277:16: error: cannot size expression Fixes: 705ececd ("Staging: add line6 usb driver") Signed-off-by:
Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Anssi Hannula authored
commit eb1a74b7 upstream. The DragonFly quirk added in 42e3121d ("ALSA: usb-audio: Add a more accurate volume quirk for AudioQuest DragonFly") applies a custom dB map on the volume control when its range is reported as 0..50 (0 .. 0.2dB). However, there exists at least one other variant (hw v1.0c, as opposed to the tested v1.2) which reports a different non-sensical volume range (0..53) and the custom map is therefore not applied for that device. This results in all of the volume change appearing close to 100% on mixer UIs that utilize the dB TLV information. Add a fallback case where no dB TLV is reported at all if the control range is not 0..50 but still 0..N where N <= 1000 (3.9 dB). Also restrict the quirk to only apply to the volume control as there is also a mute control which would match the check otherwise. Fixes: 42e3121d ("ALSA: usb-audio: Add a more accurate volume quirk for AudioQuest DragonFly") Signed-off-by:
Anssi Hannula <anssi.hannula@iki.fi> Reported-by:
David W <regulars@d-dub.org.uk> Tested-by:
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Takashi Iwai authored
commit db685779 upstream. The pointer callbacks of ali5451 driver may return the value at the boundary occasionally, and it results in the kernel warning like snd_ali5451 0000:00:06.0: BUG: , pos = 16384, buffer size = 16384, period size = 1024 It seems that folding the position offset is enough for fixing the warning and no ill-effect has been seen by that. Reported-by:
Enrico Mioso <mrkiko.rs@gmail.com> Tested-by:
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Lu Baolu authored
commit 5e6c88d2 upstream. Commit 50c763f8 ("usb: dwc3: Set the ClearPendIN bit on Clear Stall EP command") sets ClearPendIN bit for all IN endpoints of v2.60a+ cores. This causes ClearStall command fails on 2.60+ cores operating in HighSpeed mode. In page 539 of 2.60a specification: "When issuing Clear Stall command for IN endpoints in SuperSpeed mode, the software must set the "ClearPendIN" bit to '1' to clear any pending IN transcations, so that the device does not expect any ACK TP from the host for the data sent earlier." It's obvious that we only need to apply this rule to those IN endpoints that currently operating in SuperSpeed mode. Fixes: 50c763f8 ("usb: dwc3: Set the ClearPendIN bit on Clear Stall EP command") Signed-off-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by:
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John Stultz authored
commit 58bfea95 upstream. In commit 27727df2 ("Avoid taking lock in NMI path with CONFIG_DEBUG_TIMEKEEPING"), I changed the logic to open-code the timekeeping_get_ns() function, but I forgot to include the unit conversion from cycles to nanoseconds, breaking the function's output, which impacts users like perf. This results in bogus perf timestamps like: swapper 0 [000] 253.427536: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 254.426573: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 254.426687: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 254.426800: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 254.426905: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 254.427022: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 254.427127: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 254.427239: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 254.427346: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 254.427463: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 255.426572: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) Instead of more reasonable expected timestamps like: swapper 0 [000] 39.953768: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 40.064839: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 40.175956: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 40.287103: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 40.398217: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 40.509324: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 40.620437: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 40.731546: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 40.842654: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 40.953772: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) swapper 0 [000] 41.064881: 111111111 cpu-clock: ffffffff810a0de6 native_safe_halt+0x6 ([kernel.kallsyms]) Add the proper use of timekeeping_delta_to_ns() to convert the cycle delta to nanoseconds as needed. Thanks to Brendan and Alexei for finding this quickly after the v4.8 release. Unfortunately the problematic commit has landed in some -stable trees so they'll need this fix as well. Many apologies for this mistake. I'll be looking to add a perf-clock sanity test to the kselftest timers tests soon. Fixes: 27727df2 "timekeeping: Avoid taking lock in NMI path with CONFIG_DEBUG_TIMEKEEPING" Reported-by:
Brendan Gregg <bgregg@netflix.com> Reported-by:
Alexei Starovoitov <alexei.starovoitov@gmail.com> Tested-and-reviewed-by:
Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by:
John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1475636148-26539-1-git-send-email-john.stultz@linaro.orgSigned-off-by:
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Andrew Donnellan authored
commit 6f38a8b9 upstream. When cxl removes a vPHB, it's possible that the pci_controller may be freed before all references to the devices on the vPHB have been released. This in turn causes an invalid memory access when the devices are eventually released, as pcibios_release_device() attempts to call the phb's release_device hook. In cxl_pci_vphb_remove(), remove the existing call to pcibios_free_controller(). Instead, use pcibios_free_controller_deferred() to free the pci_controller after all devices have been released. Export pci_set_host_bridge_release() so we can do this. Signed-off-by:
Andrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by:
Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Acked-by:
Ian Munsie <imunsie@au1.ibm.com> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Mauricio Faria de Oliveira authored
commit 2dd9c11b upstream. This patch leverages 'struct pci_host_bridge' from the PCI subsystem in order to free the pci_controller only after the last reference to its devices is dropped (avoiding an oops in pcibios_release_device() if the last reference is dropped after pcibios_free_controller()). The patch relies on pci_host_bridge.release_fn() (and .release_data), which is called automatically by the PCI subsystem when the root bus is released (i.e., the last reference is dropped). Those fields are set via pci_set_host_bridge_release() (e.g. in the platform-specific implementation of pcibios_root_bridge_prepare()). It introduces the 'pcibios_free_controller_deferred()' .release_fn() and it expects .release_data to hold a pointer to the pci_controller. The function implictly calls 'pcibios_free_controller()', so an user must *NOT* explicitly call it if using the new _deferred() callback. The functionality is enabled for pseries (although it isn't platform specific, and may be used by cxl). Details on not-so-elegant design choices: - Use 'pci_host_bridge.release_data' field as pointer to associated 'struct pci_controller' so *not* to 'pci_bus_to_host(bridge->bus)' in pcibios_free_controller_deferred(). That's because pci_remove_root_bus() sets 'host_bridge->bus = NULL' (so, if the last reference is released after pci_remove_root_bus() runs, which eventually reaches pcibios_free_controller_deferred(), that would hit a null pointer dereference). The cxl/vphb.c code calls pci_remove_root_bus(), and the cxl folks are interested in this fix. Test-case #1 (hold references) # ls -ld /sys/block/sd* | grep -m1 0021:01:00.0 <...> /sys/block/sdaa -> ../devices/pci0021:01/0021:01:00.0/<...> # ls -ld /sys/block/sd* | grep -m1 0021:01:00.1 <...> /sys/block/sdab -> ../devices/pci0021:01/0021:01:00.1/<...> # cat >/dev/sdaa & pid1=$! # cat >/dev/sdab & pid2=$! # drmgr -w 5 -d 1 -c phb -s 'PHB 33' -r Validating PHB DLPAR capability...yes. [ 594.306719] pci_hp_remove_devices: PCI: Removing devices on bus 0021:01 [ 594.306738] pci_hp_remove_devices: Removing 0021:01:00.0... ... [ 598.236381] pci_hp_remove_devices: Removing 0021:01:00.1... ... [ 611.972077] pci_bus 0021:01: busn_res: [bus 01-ff] is released [ 611.972140] rpadlpar_io: slot PHB 33 removed # kill -9 $pid1 # kill -9 $pid2 [ 632.918088] pcibios_free_controller_deferred: domain 33, dynamic 1 Test-case #2 (don't hold references) # drmgr -w 5 -d 1 -c phb -s 'PHB 33' -r Validating PHB DLPAR capability...yes. [ 916.357363] pci_hp_remove_devices: PCI: Removing devices on bus 0021:01 [ 916.357386] pci_hp_remove_devices: Removing 0021:01:00.0... ... [ 920.566527] pci_hp_remove_devices: Removing 0021:01:00.1... ... [ 933.955873] pci_bus 0021:01: busn_res: [bus 01-ff] is released [ 933.955977] pcibios_free_controller_deferred: domain 33, dynamic 1 [ 933.955999] rpadlpar_io: slot PHB 33 removed Suggested-By:
Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by:
Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com> Reviewed-by:
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- 07 Oct, 2016 14 commits
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Greg Kroah-Hartman authored
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Takashi Iwai authored
commit 0eec8809 upstream. HP Spectre x360 with CX20724 codec has two speaker outputs while the BIOS sets up only the bottom one (NID 0x17) and disables the top one (NID 0x1d). This patch adds a fixup simply defining the proper pincfg for NID 0x1d so that the top speaker works as is. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=169071Signed-off-by:
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Hui Wang authored
commit 3f640970 upstream. One of the laptops has the codec ALC256 on it, applying the ALC255_FIXUP_DELL1_MIC_NO_PRESENCE can fix the problem, the rest of laptops have the codec ALC295 on them, they are similar to machines with ALC225, applying the ALC269_FIXUP_DELL1_MIC_NO_PRESENCE can fix the problem. Signed-off-by:
Hui Wang <hui.wang@canonical.com> Signed-off-by:
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Hui Wang authored
commit 392c9da2 upstream. We have two new Dell laptop models, they have the same ALC255 pin definition, but not in the pin quirk table yet, as a result, the headset microphone can't work. After adding the definition in the table, the headset microphone works well. Signed-off-by:
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Greg Kroah-Hartman authored
commit ab21b63e upstream. This reverts commit e6c7efdc. Turns out it was totally wrong. The memory is supposed to be bound to the kref, as the original code was doing correctly, not the device/driver binding as the devm_kzalloc() would cause. This fixes an oops when read would be called after the device was unbound from the driver. Reported-by:
Ladislav Michl <ladis@linux-mips.org> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
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Kyle Jones authored
commit decc5360 upstream. Signed-off-by:
Kyle Jones <kyle@kf5jwc.us> Signed-off-by:
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Nicolas Iooss authored
commit 238b7bd9 upstream. In v_recv_cmd_submit(), urb_p->urb->pipe has the type unsigned int (which is 32-bit long on x86_64) but 11<<30 results in a 34-bit integer. Therefore the 2 leading bits are truncated and urb_p->urb->pipe &= ~(11 << 30); has the same meaning as urb_p->urb->pipe &= ~(3 << 30); This second statement seems to be how the code was intended to be written, as PIPE_ constants have values between 0 and 3. The overflow has been detected with a clang warning: drivers/usb/usbip/vudc_rx.c:145:27: warning: signed shift result (0x2C0000000) requires 35 bits to represent, but 'int' only has 32 bits [-Wshift-overflow] urb_p->urb->pipe &= ~(11 << 30); ~~ ^ ~~ Fixes: 79c02cb1 ("usbip: vudc: Add vudc_rx") Signed-off-by:
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Ksenija Stanojevic authored
commit fc1e2c8e upstream. Commit 367e8560 introduced a bug in fbtft-core where fps is always 0, this is because variable update_time is not assigned correctly. Signed-off-by:
Ksenija Stanojevic <ksenija.stanojevic@gmail.com> Fixes: 367e8560 ("Staging: fbtbt: Replace timespec with ktime_t") Signed-off-by:
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Greg Kroah-Hartman authored
commit 2fae9e5a upstream. This patch fixes a NULL pointer dereference caused by a race codition in the probe function of the legousbtower driver. It re-structures the probe function to only register the interface after successfully reading the board's firmware ID. The probe function does not deregister the usb interface after an error receiving the devices firmware ID. The device file registered (/dev/usb/legousbtower%d) may be read/written globally before the probe function returns. When tower_delete is called in the probe function (after an r/w has been initiated), core dev structures are deleted while the file operation functions are still running. If the 0 address is mappable on the machine, this vulnerability can be used to create a Local Priviege Escalation exploit via a write-what-where condition by remapping dev->interrupt_out_buffer in tower_write. A forged USB device and local program execution would be required for LPE. The USB device would have to delay the control message in tower_probe and accept the control urb in tower_open whilst guest code initiated a write to the device file as tower_delete is called from the error in tower_probe. This bug has existed since 2003. Patch tested by emulated device. Reported-by:
James Patrick-Evans <james@jmp-e.com> Tested-by:
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Mikulas Patocka authored
commit 7efb3673 upstream. bio_alloc() can allocate a bio with at most BIO_MAX_PAGES (256) vector entries. However, the incoming bio may have more vector entries if it was allocated by other means. For example, bcache submits bios with more than BIO_MAX_PAGES entries. This results in bio_alloc() failure. To avoid the failure, change the code so that it allocates bio with at most BIO_MAX_PAGES entries. If the incoming bio has more entries, bio_add_page() will fail and a new bio will be allocated - the code that handles bio_add_page() failure already exists in the dm-log-writes target. Signed-off-by:
Mikulas Patocka <mpatocka@redhat.com> Reviewed-by:
Josef Bacik <jbacik@fb.com> Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
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Jann Horn authored
commit 22f6b4d3 upstream. This ensures that do_mmap() won't implicitly make AIO memory mappings executable if the READ_IMPLIES_EXEC personality flag is set. Such behavior is problematic because the security_mmap_file LSM hook doesn't catch this case, potentially permitting an attacker to bypass a W^X policy enforced by SELinux. I have tested the patch on my machine. To test the behavior, compile and run this: #define _GNU_SOURCE #include <unistd.h> #include <sys/personality.h> #include <linux/aio_abi.h> #include <err.h> #include <stdlib.h> #include <stdio.h> #include <sys/syscall.h> int main(void) { personality(READ_IMPLIES_EXEC); aio_context_t ctx = 0; if (syscall(__NR_io_setup, 1, &ctx)) err(1, "io_setup"); char cmd[1000]; sprintf(cmd, "cat /proc/%d/maps | grep -F '/[aio]'", (int)getpid()); system(cmd); return 0; } In the output, "rw-s" is good, "rwxs" is bad. Signed-off-by:
Jann Horn <jann@thejh.net> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Jarkko Sakkinen authored
commit 422eac3f upstream. On my Lenovo x250 the following situation occurs: [18697.813871] tpm_crb MSFT0101:00: can't request region for resource [mem 0xacdff080-0xacdfffff] The mapping of the control area overlaps the mapping of the command buffer. The control area is mapped over page, which is not right. It should mapped over sizeof(struct crb_control_area). Fixing this issue unmasks another issue. Command and response buffers can overlap and they do interleave on this machine. According to the PTP specification the overlapping means that they are mapped to the same buffer. The commit has been also on a Haswell NUC where things worked before applying this fix so that the both code paths for response buffer initialization are tested. Cc: stable@vger.kernel.org Fixes: 1bd047be ("tpm_crb: Use devm_ioremap_resource") Signed-off-by:
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by:
Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by:
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Jarkko Sakkinen authored
commit 14ddfbf4 upstream. The iomem resource is needed only temporarily so it is better to pass it on instead of storing it permanently. Named the variable as io_res so that the code better documents itself. Signed-off-by:
Stefan Berger <stefanb@linux.vnet.ibm.com> Signed-off-by:
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Marek Lindner authored
commit d9f17987 upstream. Signed-off-by:
Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by:
Sven Eckelmann <sven@narfation.org> Signed-off-by:
Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by:
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