- 12 Jul, 2017 18 commits
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Geert Uytterhoeven authored
commit 4324b608 upstream. Fix typos in hscif2_clk_b_mux[] and hscif4_ctrl_mux[]. Fixes: a56069c4 ("pinctrl: sh-pfc: r8a7795: Add HSCIF pins, groups, and functions") Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Sergei Shtylyov authored
commit 3908632f upstream. The R8A7791 PFC driver was apparently based on the preliminary revisions of the user's manual, which omitted the DVC_MUTE signal altogether in the PFC section. The modern manual has the signal described, so just add the necassary data to the driver... Fixes: 50884519 ("pinctrl: sh-pfc: r8a7791 PFC support") Signed-off-by:
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by:
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Sergei Shtylyov authored
commit 58439280 upstream. PINMUX_IPSR_MSEL() macro invocation for the TX2 signal has apparently wrong 1st argument -- most probably a result of cut&paste programming... Fixes: 50884519 ("pinctrl: sh-pfc: r8a7791 PFC support") Signed-off-by:
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Sergei Shtylyov authored
commit 5f4c8caf upstream. All R8A7794 manuals I have here (0.50 and 1.10) agree that the PFC driver has ATAG0# and ATAWR0# signals in IPSR12 swapped -- fix this. Fixes: 43c4436e ("pinctrl: sh-pfc: add R8A7794 PFC support") Signed-off-by:
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Juri Lelli authored
commit f70b281b upstream. The sysfs cpu_capacity entry for each CPU has nothing to do with PROC_FS, nor it's in /proc/sys path. Remove such ifdef. Cc: Russell King <linux@arm.linux.org.uk> Reported-and-suggested-by:
Sudeep Holla <sudeep.holla@arm.com> Fixes: 7e5930aa ('ARM: 8622/3: add sysfs cpu_capacity attribute') Signed-off-by:
Juri Lelli <juri.lelli@arm.com> Acked-by:
Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by:
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Johan Hovold authored
commit e271b2c9 upstream. Make sure to release any OF device-node reference taken when creating the USB device. Note that we currently do not hold a reference to the root hub device-tree node (i.e. the parent controller node). Fixes: 69bec725 ("USB: core: let USB device know device node") Acked-by:
Peter Chen <peter.chen@nxp.com> Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Benjamin Herrenschmidt authored
commit 7cf916bd upstream. The current definition is wrong. This breaks my upcoming Aspeed virtual hub driver. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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Michael Grzeschik authored
commit b3b51417 upstream. The usbip stack dynamically allocates the transfer_buffer and setup_packet of each urb that got generated by the tcp to usb stub code. As these pointers are always used only once we will set them to NULL after use. This is done likewise to the free_urb code in vudc_dev.c. This patch fixes double kfree situations where the usbip remote side added the URB_FREE_BUFFER. Signed-off-by:
Michael Grzeschik <m.grzeschik@pengutronix.de> Acked-by:
Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by:
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Devin Heitmueller authored
commit 6836796d upstream. The USB core and sysfs will attempt to enumerate certain parameters which are unsupported by the au0828 - causing inconsistent behavior and sometimes causing the chip to reset. Avoid making these calls. This problem manifested as intermittent cases where the au8522 would be reset on analog video startup, in particular when starting up ALSA audio streaming in parallel - the sysfs entries created by snd-usb-audio on streaming startup would result in unsupported control messages being sent during tuning which would put the chip into an unknown state. Signed-off-by:
Devin Heitmueller <dheitmueller@kernellabs.com> Signed-off-by:
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Jeremie Rapin authored
commit fd90f73a upstream. Added the USB serial device ID for the CEL ZigBee EM3588 radio stick. Signed-off-by:
Jeremie Rapin <rapinj@gmail.com> Acked-by:
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Felipe Balbi authored
commit 04fb365c upstream. %p will leak kernel pointers, so let's not expose the information on dmesg and instead use %pK. %pK will only show the actual addresses if explicitly enabled under /proc/sys/kernel/kptr_restrict. Acked-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by:
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Gerd Hoffmann authored
commit 385aee96 upstream. Reported-by:
李强 <liqiang6-s@360.cn> Signed-off-by:
Gerd Hoffmann <kraxel@redhat.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170406155941.458-1-kraxel@redhat.comSigned-off-by:
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Sabrina Dubroca authored
commit 9e52b325 upstream. Always try to parse an address, since kstrtoul() will safely fail when given a symbol as input. If that fails (which will be the case for a symbol), try to parse a symbol instead. This allows creating a probe such as: p:probe/vlan_gro_receive 8021q:vlan_gro_receive+0 Which is necessary for this command to work: perf probe -m 8021q -a vlan_gro_receive Link: http://lkml.kernel.org/r/fd72d666f45b114e2c5b9cf7e27b91de1ec966f1.1498122881.git.sd@queasysnail.net Fixes: 413d37d1 ("tracing: Add kprobe-based event tracer") Acked-by:
Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by:
Sabrina Dubroca <sd@queasysnail.net> Signed-off-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by:
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Yan, Zheng authored
commit b50c2de5 upstream. The dirfragtree is lazily updated, it's not always accurate. Infinite loops happens in following circumstance. - client send request to read frag A - frag A has been fragmented into frag B and C. So mds fills the reply with contents of frag B - client wants to read next frag C. ceph_choose_frag(frag value of C) return frag A. The fix is using previous readdir reply to calculate next readdir frag when possible. Signed-off-by:
"Yan, Zheng" <zyan@redhat.com> Signed-off-by:
Ilya Dryomov <idryomov@gmail.com> Signed-off-by:
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Boris Pismenny authored
commit 5ecce4c9 upstream. The ib_uverbs_create_ah() ind ib_uverbs_modify_qp() calls receive the port number from user input as part of its attributes and assumes it is valid. Down on the stack, that parameter is used to access kernel data structures. If the value is invalid, the kernel accesses memory it should not. To prevent this, verify the port number before using it. BUG: KASAN: use-after-free in ib_uverbs_create_ah+0x6d5/0x7b0 Read of size 4 at addr ffff880018d67ab8 by task syz-executor/313 BUG: KASAN: slab-out-of-bounds in modify_qp.isra.4+0x19d0/0x1ef0 Read of size 4 at addr ffff88006c40ec58 by task syz-executor/819 Fixes: 67cdb40c ("[IB] uverbs: Implement more commands") Fixes: 189aba99 ("IB/uverbs: Extend modify_qp and support packet pacing") Cc: Yevgeny Kliteynik <kliteyn@mellanox.com> Cc: Tziporet Koren <tziporet@mellanox.com> Cc: Alex Polak <alexpo@mellanox.com> Signed-off-by:
Boris Pismenny <borisp@mellanox.com> Signed-off-by:
Leon Romanovsky <leon@kernel.org> Signed-off-by:
Doug Ledford <dledford@redhat.com> Signed-off-by:
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Adrian Salido authored
commit 62655397 upstream. The driver_override implementation is susceptible to race condition when different threads are reading vs storing a different driver override. Add locking to avoid race condition. Fixes: 3d713e0e ("driver core: platform: add device binding path 'driver_override'") Cc: stable@vger.kernel.org Signed-off-by:
Adrian Salido <salidoa@google.com> Signed-off-by:
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Christoph Hellwig authored
commit 629e014b upstream. Currently we just stash anything we got into file->f_flags, and the report it in fcntl(F_GETFD). This patch just clears out all unknown flags so that we don't pass them to the fs or report them. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Christoph Hellwig authored
commit 80f18379 upstream. Add a central define for all valid open flags, and use it in the uniqueness check. Signed-off-by:
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- 05 Jul, 2017 22 commits
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Greg Kroah-Hartman authored
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David S. Miller authored
commit ed66e50d upstream. > ../drivers/hsi/clients/ssi_protocol.c:1069:5: error: 'struct net_device' has no member named 'destructor' Reported-by:
Mark Brown <broonie@kernel.org> Reported-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
David S. Miller <davem@davemloft.net> Cc: Guenter Roeck <linux@roeck-us.net> Signed-off-by:
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Steffen Klassert authored
[ Upstream commit 0e78a873 ] Locally generated TCP packets are usually cloned, so we do skb_cow_data() on this packets. After that we need to reload the pointer to the esp header. On udpencap this header has an offset to skb_transport_header, so take this offset into account. This is a backport of: commit 0e78a873 ("esp4: Fix udpencap for local TCP packets.") Fixes: 67d349ed ("net/esp4: Fix invalid esph pointer crash") Fixes: fca11ebd ("esp4: Reorganize esp_output") Reported-by:
Don Bowman <db@donbowman.ca> Signed-off-by:
Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by:
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Wanpeng Li authored
commit d4912215 upstream. WARNING: CPU: 3 PID: 2840 at arch/x86/kvm/vmx.c:10966 nested_vmx_vmexit+0xdcd/0xde0 [kvm_intel] CPU: 3 PID: 2840 Comm: qemu-system-x86 Tainted: G OE 4.12.0-rc3+ #23 RIP: 0010:nested_vmx_vmexit+0xdcd/0xde0 [kvm_intel] Call Trace: ? kvm_check_async_pf_completion+0xef/0x120 [kvm] ? rcu_read_lock_sched_held+0x79/0x80 vmx_queue_exception+0x104/0x160 [kvm_intel] ? vmx_queue_exception+0x104/0x160 [kvm_intel] kvm_arch_vcpu_ioctl_run+0x1171/0x1ce0 [kvm] ? kvm_arch_vcpu_load+0x47/0x240 [kvm] ? kvm_arch_vcpu_load+0x62/0x240 [kvm] kvm_vcpu_ioctl+0x384/0x7b0 [kvm] ? kvm_vcpu_ioctl+0x384/0x7b0 [kvm] ? __fget+0xf3/0x210 do_vfs_ioctl+0xa4/0x700 ? __fget+0x114/0x210 SyS_ioctl+0x79/0x90 do_syscall_64+0x81/0x220 entry_SYSCALL64_slow_path+0x25/0x25 This is triggered occasionally by running both win7 and win2016 in L2, in addition, EPT is disabled on both L1 and L2. It can't be reproduced easily. Commit 0b6ac343 (KVM: nVMX: Correct handling of exception injection) mentioned that "KVM wants to inject page-faults which it got to the guest. This function assumes it is called with the exit reason in vmcs02 being a #PF exception". Commit e011c663 (KVM: nVMX: Check all exceptions for intercept during delivery to L2) allows to check all exceptions for intercept during delivery to L2. However, there is no guarantee the exit reason is exception currently, when there is an external interrupt occurred on host, maybe a time interrupt for host which should not be injected to guest, and somewhere queues an exception, then the function nested_vmx_check_exception() will be called and the vmexit emulation codes will try to emulate the "Acknowledge interrupt on exit" behavior, the warning is triggered. Reusing the exit reason from the L2->L0 vmexit is wrong in this case, the reason must always be EXCEPTION_NMI when injecting an exception into L1 as a nested vmexit. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by:
Wanpeng Li <wanpeng.li@hotmail.com> Fixes: e011c663 ("KVM: nVMX: Check all exceptions for intercept during delivery to L2") Signed-off-by:
Radim Krčmář <rkrcmar@redhat.com> Signed-off-by:
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Radim Krčmář authored
commit f0367ee1 upstream. Static checker noticed that base3 could be used uninitialized if the segment was not present (useable). Random stack values probably would not pass VMCS entry checks. Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Fixes: 1aa36616 ("KVM: x86 emulator: consolidate segment accessors") Reviewed-by:
Paolo Bonzini <pbonzini@redhat.com> Reviewed-by:
David Hildenbrand <david@redhat.com> Signed-off-by:
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Radim Krčmář authored
commit 34b0dadb upstream. Static analysis noticed that pmu->nr_arch_gp_counters can be 32 (INTEL_PMC_MAX_GENERIC) and therefore cannot be used to shift 'int'. I didn't add BUILD_BUG_ON for it as we have a better checker. Reported-by:
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Ladi Prosek authored
commit 6ed071f0 upstream. On AMD, the effect of set_nmi_mask called by emulate_iret_real and em_rsm on hflags is reverted later on in x86_emulate_instruction where hflags are overwritten with ctxt->emul_flags (the kvm_set_hflags call). This manifests as a hang when rebooting Windows VMs with QEMU, OVMF, and >1 vcpu. Instead of trying to merge ctxt->emul_flags into vcpu->arch.hflags after an instruction is emulated, this commit deletes emul_flags altogether and makes the emulator access vcpu->arch.hflags using two new accessors. This way all changes, on the emulator side as well as in functions called from the emulator and accessing vcpu state with emul_to_vcpu, are preserved. More details on the bug and its manifestation with Windows and OVMF: It's a KVM bug in the interaction between SMI/SMM and NMI, specific to AMD. I believe that the SMM part explains why we started seeing this only with OVMF. KVM masks and unmasks NMI when entering and leaving SMM. When KVM emulates the RSM instruction in em_rsm, the set_nmi_mask call doesn't stick because later on in x86_emulate_instruction we overwrite arch.hflags with ctxt->emul_flags, effectively reverting the effect of the set_nmi_mask call. The AMD-specific hflag of interest here is HF_NMI_MASK. When rebooting the system, Windows sends an NMI IPI to all but the current cpu to shut them down. Only after all of them are parked in HLT will the initiating cpu finish the restart. If NMI is masked, other cpus never get the memo and the initiating cpu spins forever, waiting for hal!HalpInterruptProcessorsStarted to drop. That's the symptom we observe. Fixes: a584539b ("KVM: x86: pass the whole hflags field to emulator and back") Signed-off-by:
Ladi Prosek <lprosek@redhat.com> Signed-off-by:
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Thomas Petazzoni authored
commit ee56874f upstream. In commit eea62819 ("mtd: Add device-tree support to fsmc_nand"), Device Tree support was added to the fmsc_nand driver. However, this code has a bug in how it handles the bank-width DT property to set the bus width. Indeed, in the function fsmc_nand_probe_config_dt() that parses the Device Tree, it sets pdata->width to either 8 or 16 depending on the value of the bank-width DT property. Then, the ->probe() function will test if pdata->width is equal to FSMC_NAND_BW16 (which is 2) to set NAND_BUSWIDTH_16 in nand->options. Therefore, with the DT probing, this condition will never match. This commit fixes that by removing the "width" field from fsmc_nand_platform_data and instead have the fsmc_nand_probe_config_dt() function directly set the appropriate nand->options value. It is worth mentioning that if this commit gets backported to older kernels, prior to the drop of non-DT probing, then non-DT probing will be broken because nand->options will no longer be set to NAND_BUSWIDTH_16. Fixes: eea62819 ("mtd: Add device-tree support to fsmc_nand") Signed-off-by:
Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Reviewed-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by:
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Kamal Dasu authored
commit 9d2ee0a6 upstream. On brcmnand controller v6.x and v7.x, the #WP pin is controlled through the NAND_WP bit in CS_SELECT register. The driver currently assumes that toggling the #WP pin is instantaneously enabling/disabling write-protection, but it actually takes some time to propagate the new state to the internal NAND chip logic. This behavior is sometime causing data corruptions when an erase/program operation is executed before write-protection has really been disabled. Fixes: 27c5b17c ("mtd: nand: add NAND driver "library" for Broadcom STB NAND controller") Signed-off-by:
Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by:
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Arnd Bergmann authored
commit 5b0ff9a0 upstream. hns_roce_v1_cq_set_ci() calls roce_set_bit() on an uninitialized field, which will then change only a few of its bits, causing a warning with the latest gcc: infiniband/hw/hns/hns_roce_hw_v1.c: In function 'hns_roce_v1_cq_set_ci': infiniband/hw/hns/hns_roce_hw_v1.c:1854:23: error: 'doorbell[1]' is used uninitialized in this function [-Werror=uninitialized] roce_set_bit(doorbell[1], ROCEE_DB_OTHERS_H_ROCEE_DB_OTH_HW_SYNS_S, 1); The code is actually correct since we always set all bits of the port_vlan field, but gcc correctly points out that the first access does contain uninitialized data. This initializes the field to zero first before setting the individual bits. Fixes: 9a443537 ("IB/hns: Add driver files for hns RoCE driver") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Suravee Suthikulpanit authored
commit 84a21dbd upstream. Pass-through devices to VM guest can get updated IRQ affinity information via irq_set_affinity() when not running in guest mode. Currently, AMD IOMMU driver in GA mode ignores the updated information if the pass-through device is setup to use vAPIC regardless of guest_mode. This could cause invalid interrupt remapping. Also, the guest_mode bit should be set and cleared only when SVM updates posted-interrupt interrupt remapping information. Signed-off-by:
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Cc: Joerg Roedel <jroedel@suse.de> Fixes: d98de49a ('iommu/amd: Enable vAPIC interrupt remapping mode by default') Signed-off-by:
Joerg Roedel <jroedel@suse.de> Signed-off-by:
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Pan Bian authored
commit 73dbd4a4 upstream. In function amd_iommu_bind_pasid(), the control flow jumps to label out_free when pasid_state->mm and mm is NULL. And mmput(mm) is called. In function mmput(mm), mm is referenced without validation. This will result in a NULL dereference bug. This patch fixes the bug. Signed-off-by:
Pan Bian <bianpan2016@163.com> Fixes: f0aac63b ('iommu/amd: Don't hold a reference to mm_struct') Signed-off-by:
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Robin Murphy authored
commit 938f1bbe upstream. Even if a host controller's CPU-side MMIO windows into PCI I/O space do happen to leak into PCI memory space such that it might treat them as peer addresses, trying to reserve the corresponding I/O space addresses doesn't do anything to help solve that problem. Stop doing a silly thing. Fixes: fade1ec0 ("iommu/dma: Avoid PCI host bridge windows") Reviewed-by:
Eric Auger <eric.auger@redhat.com> Signed-off-by:
Robin Murphy <robin.murphy@arm.com> Signed-off-by:
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Eric Ren authored
commit 8818efaa upstream. Another deadlock path caused by recursive locking is reported. This kind of issue was introduced since commit 743b5f14 ("ocfs2: take inode lock in ocfs2_iop_set/get_acl()"). Two deadlock paths have been fixed by commit b891fa50 ("ocfs2: fix deadlock issue when taking inode lock at vfs entry points"). Yes, we intend to fix this kind of case in incremental way, because it's hard to find out all possible paths at once. This one can be reproduced like this. On node1, cp a large file from home directory to ocfs2 mountpoint. While on node2, run setfacl/getfacl. Both nodes will hang up there. The backtraces: On node1: __ocfs2_cluster_lock.isra.39+0x357/0x740 [ocfs2] ocfs2_inode_lock_full_nested+0x17d/0x840 [ocfs2] ocfs2_write_begin+0x43/0x1a0 [ocfs2] generic_perform_write+0xa9/0x180 __generic_file_write_iter+0x1aa/0x1d0 ocfs2_file_write_iter+0x4f4/0xb40 [ocfs2] __vfs_write+0xc3/0x130 vfs_write+0xb1/0x1a0 SyS_write+0x46/0xa0 On node2: __ocfs2_cluster_lock.isra.39+0x357/0x740 [ocfs2] ocfs2_inode_lock_full_nested+0x17d/0x840 [ocfs2] ocfs2_xattr_set+0x12e/0xe80 [ocfs2] ocfs2_set_acl+0x22d/0x260 [ocfs2] ocfs2_iop_set_acl+0x65/0xb0 [ocfs2] set_posix_acl+0x75/0xb0 posix_acl_xattr_set+0x49/0xa0 __vfs_setxattr+0x69/0x80 __vfs_setxattr_noperm+0x72/0x1a0 vfs_setxattr+0xa7/0xb0 setxattr+0x12d/0x190 path_setxattr+0x9f/0xb0 SyS_setxattr+0x14/0x20 Fix this one by using ocfs2_inode_{lock|unlock}_tracker, which is exported by commit 439a36b8 ("ocfs2/dlmglue: prepare tracking logic to avoid recursive cluster lock"). Link: http://lkml.kernel.org/r/20170622014746.5815-1-zren@suse.com Fixes: 743b5f14 ("ocfs2: take inode lock in ocfs2_iop_set/get_acl()") Signed-off-by:
Eric Ren <zren@suse.com> Reported-by:
Thomas Voegtle <tv@lio96.de> Tested-by:
Joseph Qi <jiangqi903@gmail.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Junxiao Bi authored
commit 33496c3c upstream. Configfs is the interface for ocfs2-tools to set configure to kernel and $configfs_dir/cluster/$clustername/heartbeat/dead_threshold is the one used to configure heartbeat dead threshold. Kernel has a default value of it but user can set O2CB_HEARTBEAT_THRESHOLD in /etc/sysconfig/o2cb to override it. Commit 45b99773 ("ocfs2/cluster: use per-attribute show and store methods") changed heartbeat dead threshold name while ocfs2-tools did not, so ocfs2-tools won't set this configurable and the default value is always used. So revert it. Fixes: 45b99773 ("ocfs2/cluster: use per-attribute show and store methods") Link: http://lkml.kernel.org/r/1490665245-15374-1-git-send-email-junxiao.bi@oracle.comSigned-off-by:
Junxiao Bi <junxiao.bi@oracle.com> Acked-by:
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Andy Lutomirski authored
commit dbd68d8e upstream. flush_tlb_page() passes a bogus range to flush_tlb_others() and expects the latter to fix it up. native_flush_tlb_others() has the fixup but Xen's version doesn't. Move the fixup to flush_tlb_others(). AFAICS the only real effect is that, without this fix, Xen would flush everything instead of just the one page on remote vCPUs in when flush_tlb_page() was called. Signed-off-by:
Andy Lutomirski <luto@kernel.org> Reviewed-by:
Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Nadav Amit <namit@vmware.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: e7b52ffd ("x86/flush_tlb: try flush_tlb_single one by one in flush_tlb_range") Link: http://lkml.kernel.org/r/10ed0e4dfea64daef10b87fb85df1746999b4dba.1492844372.git.luto@kernel.orgSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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Joerg Roedel authored
commit 5ed386ec upstream. When this function fails it just sends a SIGSEGV signal to user-space using force_sig(). This signal is missing essential information about the cause, e.g. the trap_nr or an error code. Fix this by propagating the error to the only caller of mpx_handle_bd_fault(), do_bounds(), which sends the correct SIGSEGV signal to the process. Signed-off-by:
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Kan Liang authored
commit fd583ad1 upstream. Spurious NMIs will be observed with the following command: while :; do perf record -bae "cpu/umask=0x01,event=0xcd,ldlat=0x80/pp" -e "cpu/umask=0x03,event=0x0/" -e "cpu/umask=0x02,event=0x0/" -e cycles,branches,cache-misses -e cache-references -- sleep 10 done The bug was introduced by commit: 8077eca0 ("perf/x86/pebs: Add workaround for broken OVFL status on HSW+") That commit clears the status bits for the counters used for PEBS events, by masking the whole 64 bits pebs_enabled. However, only the low 32 bits of both status and pebs_enabled are reserved for PEBS-able counters. For status bits 32-34 are fixed counter overflow bits. For pebs_enabled bits 32-34 are for PEBS Load Latency. In the test case, the PEBS Load Latency event and fixed counter event could overflow at the same time. The fixed counter overflow bit will be cleared by mistake. Once it is cleared, the fixed counter overflow never be processed, which finally trigger spurious NMI. Correct the PEBS enabled mask by ignoring the non-PEBS bits. Signed-off-by:
Kan Liang <kan.liang@intel.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Fixes: 8077eca0 ("perf/x86/pebs: Add workaround for broken OVFL status on HSW+") Link: http://lkml.kernel.org/r/1491333246-3965-1-git-send-email-kan.liang@intel.comSigned-off-by:
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Baoquan He authored
commit 8eabf42a upstream. Kernel text KASLR is separated into physical address and virtual address randomization. And for virtual address randomization, we only randomiza to get an offset between 16M and KERNEL_IMAGE_SIZE. So the initial value of 'virt_addr' should be LOAD_PHYSICAL_ADDR, but not the original kernel loading address 'output'. The bug will cause kernel boot failure if kernel is loaded at a different position than the address, 16M, which is decided at compiled time. Kexec/kdump is such practical case. To fix it, just assign LOAD_PHYSICAL_ADDR to virt_addr as initial value. Tested-by:
Dave Young <dyoung@redhat.com> Signed-off-by:
Baoquan He <bhe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 8391c73c ("x86/KASLR: Randomize virtual address separately") Link: http://lkml.kernel.org/r/1498567146-11990-3-git-send-email-bhe@redhat.comSigned-off-by:
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Thomas Gleixner authored
commit 26fcd952 upstream. A recent commit included linux/slab.h in linux/irq.h. This breaks the build of vdso32 on a 64-bit kernel. The reason is that linux/irq.h gets included into the vdso code via linux/interrupt.h which is included from asm/mshyperv.h. That makes the 32-bit vdso compile fail, because slab.h includes the pgtable headers for 64-bit on a 64-bit build. Neither linux/clocksource.h nor linux/interrupt.h are needed in the mshyperv.h header file itself - it has a dependency on <linux/atomic.h>. Remove the includes and unbreak the build. Reported-by:
Thomas Gleixner <tglx@linutronix.de> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: devel@linuxdriverproject.org Fixes: dee863b5 ("hv: export current Hyper-V clocksource") Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1706231038460.2647@nanosSigned-off-by:
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Josh Poimboeuf authored
commit ebd57499 upstream. Petr Mladek reported the following warning when loading the livepatch sample module: WARNING: CPU: 1 PID: 3699 at arch/x86/kernel/stacktrace.c:132 save_stack_trace_tsk_reliable+0x133/0x1a0 ... Call Trace: __schedule+0x273/0x820 schedule+0x36/0x80 kthreadd+0x305/0x310 ? kthread_create_on_cpu+0x80/0x80 ? icmp_echo.part.32+0x50/0x50 ret_from_fork+0x2c/0x40 That warning means the end of the stack is no longer recognized as such for newly forked tasks. The problem was introduced with the following commit: ff3f7e24 ("x86/entry: Fix the end of the stack for newly forked tasks") ... which was completely misguided. It only partially fixed the reported issue, and it introduced another bug in the process. None of the other entry code saves the frame pointer before calling into C code, so it doesn't make sense for ret_from_fork to do so either. Contrary to what I originally thought, the original issue wasn't related to newly forked tasks. It was actually related to ftrace. When entry code calls into a function which then calls into an ftrace handler, the stack frame looks different than normal. The original issue will be fixed in the unwinder, in a subsequent patch. Reported-by:
Petr Mladek <pmladek@suse.com> Signed-off-by:
Josh Poimboeuf <jpoimboe@redhat.com> Acked-by:
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Arnaldo Carvalho de Melo authored
commit e883d09c upstream. Just a minor fix done in: Fixes: 26a37ab3 ("x86/mce: Fix copy/paste error in exception table entries") Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/n/tip-ni9jzdd5yxlail6pq8cuexw2@git.kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:
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