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2017-07-27drm/i915: Fix cursor updates on some platformsVille Syrjälä
Turns out that just writing CURPOS isn't sufficient to move the cursor on some platforms. My 830 works just fine, but eg. 945 and PNV don't. On those platforms we need to arm even the CURPOS update with a CURBASE write. Even worse, a write to any of the cursor register apart from CURBASE will cancel an already pending cursor update. So if we have armed a CURCNTR/CURBASE update, a subsequent CURPOS write prior to vblank would cancel that armed update. Thus we're left with a cursor that doesn't appear to move, or even change shape. Fix the problem by always performing the CURBASE write after a CURPOS write. Bspec is somewhat unclear which platforms actually require this CURBASE write and which don't. So to keep it simple and to make sure we really fix the problem across all supported devices, let's just perform the CURBASE write unconditionally. Cc: Paul Menzel <pmenzel@molgen.mpg.de> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101790 Fixes: 75343a44c901 ("drm/i915: Drop useless posting reads from cursor commit") Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Tested-by: Paul Menzel <paulepanter@users.sourceforge.net> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20170714155227.6089-1-ville.syrjala@linux.intel.com (cherry picked from commit 8753d2bc5e49daad301ce65f5dada57ed924fad6) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2017-07-27drm/i915: Fix user ptr check size in eb_relocate_vma()Imre Deak
Fix the sizeof(ptr) vs. sizeof(*ptr) typo. Fixes: 2889caa92321 ("drm/i915: Eliminate lots of iterations over the execobjects array") Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Link: http://patchwork.freedesktop.org/patch/msgid/20170714151242.517-2-imre.deak@intel.com (cherry picked from commit edd9003f7f9dddd28fdd768e6e7569d996c769cb) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2017-07-27sctp: fix the check for _sctp_walk_params and _sctp_walk_errorsXin Long
Commit b1f5bfc27a19 ("sctp: don't dereference ptr before leaving _sctp_walk_{params, errors}()") tried to fix the issue that it may overstep the chunk end for _sctp_walk_{params, errors} with 'chunk_end > offset(length) + sizeof(length)'. But it introduced a side effect: When processing INIT, it verifies the chunks with 'param.v == chunk_end' after iterating all params by sctp_walk_params(). With the check 'chunk_end > offset(length) + sizeof(length)', it would return when the last param is not yet accessed. Because the last param usually is fwdtsn supported param whose size is 4 and 'chunk_end == offset(length) + sizeof(length)' This is a badly issue even causing sctp couldn't process 4-shakes. Client would always get abort when connecting to server, due to the failure of INIT chunk verification on server. The patch is to use 'chunk_end <= offset(length) + sizeof(length)' instead of 'chunk_end < offset(length) + sizeof(length)' for both _sctp_walk_params and _sctp_walk_errors. Fixes: b1f5bfc27a19 ("sctp: don't dereference ptr before leaving _sctp_walk_{params, errors}()") Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-27dccp: fix a memleak for dccp_feat_init err processXin Long
In dccp_feat_init, when ccid_get_builtin_ccids failsto alloc memory for rx.val, it should free tx.val before returning an error. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-27dccp: fix a memleak that dccp_ipv4 doesn't put reqsk properlyXin Long
The patch "dccp: fix a memleak that dccp_ipv6 doesn't put reqsk properly" fixed reqsk refcnt leak for dccp_ipv6. The same issue exists on dccp_ipv4. This patch is to fix it for dccp_ipv4. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-27dccp: fix a memleak that dccp_ipv6 doesn't put reqsk properlyXin Long
In dccp_v6_conn_request, after reqsk gets alloced and hashed into ehash table, reqsk's refcnt is set 3. one is for req->rsk_timer, one is for hlist, and the other one is for current using. The problem is when dccp_v6_conn_request returns and finishes using reqsk, it doesn't put reqsk. This will cause reqsk refcnt leaks and reqsk obj never gets freed. Jianlin found this issue when running dccp_memleak.c in a loop, the system memory would run out. dccp_memleak.c: int s1 = socket(PF_INET6, 6, IPPROTO_IP); bind(s1, &sa1, 0x20); listen(s1, 0x9); int s2 = socket(PF_INET6, 6, IPPROTO_IP); connect(s2, &sa1, 0x20); close(s1); close(s2); This patch is to put the reqsk before dccp_v6_conn_request returns, just as what tcp_conn_request does. Reported-by: Jianlin Shi <jishi@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-27powerpc/mm/hash: Free the subpage_prot_table correctlyAneesh Kumar K.V
Fixes: dad6f37c2602e ("powerpc: subpage_protect: Increase the array size to take care of 64TB") Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Tested-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-07-27drm: exynos: mark pm functions as __maybe_unusedArnd Bergmann
The rework of the exynos DRM clock handling introduced warnings for configurations that have CONFIG_PM disabled: drivers/gpu/drm/exynos/exynos_hdmi.c:736:13: error: 'hdmi_clk_disable_gates' defined but not used [-Werror=unused-function] static void hdmi_clk_disable_gates(struct hdmi_context *hdata) ^~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/exynos/exynos_hdmi.c:717:12: error: 'hdmi_clk_enable_gates' defined but not used [-Werror=unused-function] static int hdmi_clk_enable_gates(struct hdmi_context *hdata) The problem is that the PM functions themselves are inside of an #ifdef, but some functions they call are not. This patch removes the #ifdef and instead marks the PM functions as __maybe_unused, which is a more reliable way to get it right. Link: https://patchwork.kernel.org/patch/8436281/ Fixes: 9be7e9898444 ("drm/exynos/hdmi: clock code re-factoring") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2017-07-27drm/exynos: select CEC_CORE if CEC_NOTIFIERHans Verkuil
If the s5p-cec driver is a module and the drm exynos driver is built-in, then the CEC core will be a module also, causing the CEC notifier to fail (will be compiled as empty functions). To prevent this select CEC_CORE if CEC_NOTIFIER is set to ensure the CEC core is also built into the kernel. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2017-07-27drm/exynos/hdmi: fix disable sequenceAndrzej Hajda
The "Fixes" patch was incorrectly merged, as a result PHY is prematurely powered off and for example Odroid-U3 cannot disable TV power domain when HDMI cable is unplugged. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Reported-by: Marek Szyprowski <m.szyprowski@samsung.com> Fixes: 625e63e2 ("drm/exynos/hdmi: fix pipeline disable order") Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2017-07-27drm/exynos: mic: add a bridge at probeInki Dae
This patch moves drm_bridge_add call into probe. It doesn't need to call drm_bridge_add call every time bind callback is called. Changelog v2 - moved drm_bridge_remove call into remove callback. - corrected description. Suggested-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Hoegeun Kwon <hoegeun.kwon@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2017-07-27drm/exynos/dsi: Remove error handling for bridge_node DT parsingHoegeun Kwon
Remove the error handling of bridge_node because the bridge_node is optional. For example, In case of Exynos SoC, a bridge device such as mDNIe and MIC could be placed between Display Controller and MIPI DSI device but the bridge device is optional. Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2017-07-27drm/exynos: dsi: do not try to find bridgeInki Dae
It doesn't need to try to find a bridge if bridge node doesn't exist. Reviewed-by: Shuah Khan <shuahkh@osg.samsung.com> Tested-by: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2017-07-27drm: exynos: hdmi: make of_device_ids const.Arvind Yadav
of_device_ids are not supposed to change at runtime. All functions working with of_device_ids provided by <linux/of.h> work with const of_device_ids. So mark the non-const structs as const. File size before: text data bss dec hex filename 12294 1192 0 13486 34ae drivers/gpu/drm/exynos/exynos_hdmi.o File size after constify hdmi_match_types. text data bss dec hex filename 13318 176 0 13494 34b6 drivers/gpu/drm/exynos/exynos_hdmi.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2017-07-27drm: exynos: constify mixer_match_types and *_mxr_drv_data.Arvind Yadav
File size before: text data bss dec hex filename 9983 1424 0 11407 2c8f drivers/gpu/drm/exynos/exynos_mixer.o File size after constify: text data bss dec hex filename 11231 176 0 11407 2c8f drivers/gpu/drm/exynos/exynos_mixer.o Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2017-07-27exynos_drm: Clean up duplicated assignment in exynos_drm_driverGabriel Krisman Bertazi
num_ioctls is already assigned when declaring the exynos_drm_driver structure. No need to duplicate it here. Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2017-07-26bpf: don't zero out the info struct in bpf_obj_get_info_by_fd()Jakub Kicinski
The buffer passed to bpf_obj_get_info_by_fd() should be initialized to zeros. Kernel will enforce that to guarantee we can safely extend info structures in the future. Making the bpf_obj_get_info_by_fd() call in libbpf perform the zeroing is problematic, however, since some members of the info structures may need to be initialized by the callers (for instance pointers to buffers to which kernel is to dump translated and jited images). Remove the zeroing and fix up the in-tree callers before any kernel has been released with this code. As Daniel points out this seems to be the intended operation anyway, since commit 95b9afd3987f ("bpf: Test for bpf ID") is itself setting the buffer pointers before calling bpf_obj_get_info_by_fd(). Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-26netpoll: Fix device name check in netpoll_setup()Matthias Kaehlcke
Apparently netpoll_setup() assumes that netpoll.dev_name is a pointer when checking if the device name is set: if (np->dev_name) { ... However the field is a character array, therefore the condition always yields true. Check instead whether the first byte of the array has a non-zero value. Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-27Merge branch 'drm-fixes-4.13' of git://people.freedesktop.org/~agd5f/linux ↵Dave Airlie
into drm-fixes Three misc amd fixes. * 'drm-fixes-4.13' of git://people.freedesktop.org/~agd5f/linux: drm/amd/powerplay: fix AVFS voltage offset for Vega10 drm/amdgpu/gfx9: simplify and fix GRBM index selection drm/amdgpu: Fix blocking in RCU critical section(v2)
2017-07-26NFS: Use raw NFS access mask in nfs4_opendata_access()Anna Schumaker
Commit bd8b2441742b ("NFS: Store the raw NFS access mask in the inode's access cache") changed how the access results are stored after an access() call. An NFS v4 OPEN might have access bits returned with the opendata, so we should use the NFS4_ACCESS values when determining the return value in nfs4_opendata_access(). Fixes: bd8b2441742b ("NFS: Store the raw NFS access mask in the inode's access cache") Reported-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Tested-by: Takashi Iwai <tiwai@suse.de>
2017-07-26bonding: commit link status change after proposeWANG Cong
Commit de77ecd4ef02 ("bonding: improve link-status update in mii-monitoring") moves link status commitment into bond_mii_monitor(), but it still relies on the return value of bond_miimon_inspect() as the hint. We need to return non-zero as long as we propose a link status change. Fixes: de77ecd4ef02 ("bonding: improve link-status update in mii-monitoring") Reported-by: Benjamin Gilbert <benjamin.gilbert@coreos.com> Tested-by: Benjamin Gilbert <benjamin.gilbert@coreos.com> Cc: Mahesh Bandewar <maheshb@google.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Mahesh Bandewar <maheshb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-26vfio/pci: Use pci_try_reset_function() on initial openAlex Williamson
Device lock bites again; if a device .remove() callback races a user calling ioctl(VFIO_GROUP_GET_DEVICE_FD), the unbind request will hold the device lock, but the user ioctl may have already taken a vfio_device reference. In the case of a PCI device, the initial open will attempt to reset the device, which again attempts to get the device lock, resulting in deadlock. Use the trylock PCI reset interface and return error on the open path if reset fails due to lock contention. Link: https://lkml.org/lkml/2017/7/25/381 Reported-by: Wen Congyang <wencongyang2@huawei.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2017-07-26dm, dax: Make sure dm_dax_flush() is called if device supports itVivek Goyal
Currently dm_dax_flush() is not being called, even if underlying dax device supports write cache, because DAXDEV_WRITE_CACHE is not being propagated up to the DM dax device. If the underlying dax device supports write cache, set DAXDEV_WRITE_CACHE on the DM dax device. This will cause dm_dax_flush() to be called. Fixes: abebfbe2f7 ("dm: add ->flush() dax operation support") Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-07-26dm verity fec: fix GFP flags used with mempool_alloc()NeilBrown
mempool_alloc() cannot fail for GFP_NOIO allocation, so there is no point testing for failure. One place the code tested for failure was passing "0" as the GFP flags. This is most unusual and is probably meant to be GFP_NOIO, so that is changed. Also, allocation from ->extra_pool and ->prealloc_pool are repeated before releasing the previous allocation. This can deadlock if the code is servicing a write under high memory pressure. To avoid deadlocks, change these to use GFP_NOWAIT and leave the error handling in place. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-07-26dm zoned: use GFP_NOIO in I/O pathDamien Le Moal
Use GFP_NOIO for memory allocations in the I/O path. Other memory allocations in the initialization path can use GFP_KERNEL. Reported-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-07-26include/linux/vfio.h: Guard powerpc-specific functions with ↵Murilo Opsfelder Araujo
CONFIG_VFIO_SPAPR_EEH When CONFIG_EEH=y and CONFIG_VFIO_SPAPR_EEH=n, build fails with the following: drivers/vfio/pci/vfio_pci.o: In function `.vfio_pci_release': vfio_pci.c:(.text+0xa98): undefined reference to `.vfio_spapr_pci_eeh_release' drivers/vfio/pci/vfio_pci.o: In function `.vfio_pci_open': vfio_pci.c:(.text+0x1420): undefined reference to `.vfio_spapr_pci_eeh_open' In this case, vfio_pci.c should use the empty definitions of vfio_spapr_pci_eeh_open and vfio_spapr_pci_eeh_release functions. This patch fixes it by guarding these function definitions with CONFIG_VFIO_SPAPR_EEH, the symbol that controls whether vfio_spapr_eeh.c is built, which is where the non-empty versions of these functions are. We need to make use of IS_ENABLED() macro because CONFIG_VFIO_SPAPR_EEH is a tristate option. This issue was found during a randconfig build. Logs are here: http://kisskb.ellerman.id.au/kisskb/buildresult/12982362/ Signed-off-by: Murilo Opsfelder Araujo <mopsfelder@gmail.com> Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2017-07-26Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds
Pull virtio fixes and cleanups from Michael Tsirkin: "Fixes some minor issues all over the codebase" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio-net: fix module unloading virtio-balloon: coding format cleanup virtio-balloon: deflate via a page list virtio_blk: Use sysfs_match_string() helper
2017-07-26Merge branch 'kvm-ppc-fixes' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-master Two commits which fix host crashes. Signed-off-by: Paolo BOnzini <pbonzini@redhat.com>
2017-07-26KVM: LAPIC: Fix reentrancy issues with preempt notifiersWanpeng Li
Preempt can occur in the preemption timer expiration handler: CPU0 CPU1 preemption timer vmexit handle_preemption_timer(vCPU0) kvm_lapic_expired_hv_timer hv_timer_is_use == true sched_out sched_in kvm_arch_vcpu_load kvm_lapic_restart_hv_timer restart_apic_timer start_hv_timer already-expired timer or sw timer triggerd in the window start_sw_timer cancel_hv_timer /* back in kvm_lapic_expired_hv_timer */ cancel_hv_timer WARN_ON(!apic->lapic_timer.hv_timer_in_use); ==> Oops This can be reproduced if CONFIG_PREEMPT is enabled. ------------[ cut here ]------------ WARNING: CPU: 4 PID: 2972 at /home/kernel/linux/arch/x86/kvm//lapic.c:1563 kvm_lapic_expired_hv_timer+0x9e/0xb0 [kvm] CPU: 4 PID: 2972 Comm: qemu-system-x86 Tainted: G OE 4.13.0-rc2+ #16 RIP: 0010:kvm_lapic_expired_hv_timer+0x9e/0xb0 [kvm] Call Trace: handle_preemption_timer+0xe/0x20 [kvm_intel] vmx_handle_exit+0xb8/0xd70 [kvm_intel] kvm_arch_vcpu_ioctl_run+0xdd1/0x1be0 [kvm] ? kvm_arch_vcpu_load+0x47/0x230 [kvm] ? kvm_arch_vcpu_load+0x62/0x230 [kvm] kvm_vcpu_ioctl+0x340/0x700 [kvm] ? kvm_vcpu_ioctl+0x340/0x700 [kvm] ? __fget+0xfc/0x210 do_vfs_ioctl+0xa4/0x6a0 ? __fget+0x11d/0x210 SyS_ioctl+0x79/0x90 do_syscall_64+0x81/0x220 entry_SYSCALL64_slow_path+0x25/0x25 ------------[ cut here ]------------ WARNING: CPU: 4 PID: 2972 at /home/kernel/linux/arch/x86/kvm//lapic.c:1498 cancel_hv_timer.isra.40+0x4f/0x60 [kvm] CPU: 4 PID: 2972 Comm: qemu-system-x86 Tainted: G W OE 4.13.0-rc2+ #16 RIP: 0010:cancel_hv_timer.isra.40+0x4f/0x60 [kvm] Call Trace: kvm_lapic_expired_hv_timer+0x3e/0xb0 [kvm] handle_preemption_timer+0xe/0x20 [kvm_intel] vmx_handle_exit+0xb8/0xd70 [kvm_intel] kvm_arch_vcpu_ioctl_run+0xdd1/0x1be0 [kvm] ? kvm_arch_vcpu_load+0x47/0x230 [kvm] ? kvm_arch_vcpu_load+0x62/0x230 [kvm] kvm_vcpu_ioctl+0x340/0x700 [kvm] ? kvm_vcpu_ioctl+0x340/0x700 [kvm] ? __fget+0xfc/0x210 do_vfs_ioctl+0xa4/0x6a0 ? __fget+0x11d/0x210 SyS_ioctl+0x79/0x90 do_syscall_64+0x81/0x220 entry_SYSCALL64_slow_path+0x25/0x25 This patch fixes it by making the caller of cancel_hv_timer, start_hv_timer and start_sw_timer be in preemption-disabled regions, which trivially avoid any reentrancy issue with preempt notifier. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com> [Add more WARNs. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-26tools/kvm_stat: add '-f help' to get the available event listLin Ma
Signed-off-by: Lin Ma <lma@suse.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-26tools/kvm_stat: use variables instead of hard paths in help outputLin Ma
Using variables instead of hard paths makes the requirements information more accurate. Signed-off-by: Lin Ma <lma@suse.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-26Merge tag 'kvm-s390-master-4.13-1' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD KVM: s390: fixup missing srcu lock We need to hold the srcu lock when accessing memory slots during migration Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-26KVM: nVMX: Fix loss of L2's NMI blocking stateWanpeng Li
Run kvm-unit-tests/eventinj.flat in L1 w/ ept=0 on both L0 and L1: Before NMI IRET test Sending NMI to self NMI isr running stack 0x461000 Sending nested NMI to self After nested NMI to self Nested NMI isr running rip=40038e After iret After NMI to self FAIL: NMI Commit 4c4a6f790ee862 (KVM: nVMX: track NMI blocking state separately for each VMCS) tracks NMI blocking state separately for vmcs01 and vmcs02. However it is not enough: - The L2 (kvm-unit-tests/eventinj.flat) generates NMI that will fault on IRET, so the L2 can generate #PF which can be intercepted by L0. - L0 walks L1's guest page table and sees the mapping is invalid, it resumes the L1 guest and injects the #PF into L1. At this point the vmcs02 has nmi_known_unmasked=true. - L1 sets set bit 3 (blocking by NMI) in the interruptibility-state field of vmcs12 (and fixes the shadow page table) before resuming L2 guest. - L1 executes VMRESUME to resume L2, causing a vmexit to L0 - during VMRESUME emulation, prepare_vmcs02 sets bit 3 in the interruptibility-state field of vmcs02, but nmi_known_unmasked is still true. - L2 immediately exits to L0 with another page fault, because L0 still has not updated the NGVA->HPA page tables. However, nmi_known_unmasked is true so vmx_recover_nmi_blocking does not do anything. The fix is to update nmi_known_unmasked when preparing vmcs02 from vmcs12. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-26KVM: nVMX: Fix posted intr delivery when vcpu is in guest modeWincy Van
The PI vector for L0 and L1 must be different. If dest vcpu0 is in guest mode while vcpu1 is delivering a non-nested PI to vcpu0, there wont't be any vmexit so that the non-nested interrupt will be delayed. Signed-off-by: Wincy Van <fanwenyi0529@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-26x86: irq: Define a global vector for nested posted interruptsWincy Van
We are using the same vector for nested/non-nested posted interrupts delivery, this may cause interrupts latency in L1 since we can't kick the L2 vcpu out of vmx-nonroot mode. This patch introduces a new vector which is only for nested posted interrupts to solve the problems above. Signed-off-by: Wincy Van <fanwenyi0529@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-26KVM: x86: do mask out upper bits of PAE CR3Paolo Bonzini
This reverts the change of commit f85c758dbee54cc3612a6e873ef7cecdb66ebee5, as the behavior it modified was intended. The VM is running in 32-bit PAE mode, and Table 4-7 of the Intel manual says: Table 4-7. Use of CR3 with PAE Paging Bit Position(s) Contents 4:0 Ignored 31:5 Physical address of the 32-Byte aligned page-directory-pointer table used for linear-address translation 63:32 Ignored (these bits exist only on processors supporting the Intel-64 architecture) To placate the static checker, write the mask explicitly as an unsigned long constant instead of using a 32-bit unsigned constant. Cc: Dan Carpenter <dan.carpenter@oracle.com> Fixes: f85c758dbee54cc3612a6e873ef7cecdb66ebee5 Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-26KVM: make pid available for uevents without debugfsClaudio Imbrenda
Simplify and improve the code so that the PID is always available in the uevent even when debugfs is not available. This adds a userspace_pid field to struct kvm, as per Radim's suggestion, so that the PID can be retrieved on destruction too. Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com> Fixes: 286de8f6ac9202 ("KVM: trigger uevents when creating or destroying a VM") Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-26udp: unbreak build lacking CONFIG_XFRMPaolo Abeni
We must use pre-processor conditional block or suitable accessors to manipulate skb->sp elsewhere builds lacking the CONFIG_XFRM will break. Fixes: dce4551cb2ad ("udp: preserve head state for IP_CMSG_PASSSEC") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-26ASoC: codecs: msm8916-analog: fix DIG_CLK_CTL_RXD3_CLK_EN defineDamien Riegel
The wrong bit is assigned to DIG_CLK_CTL_RXD3_CLK_EN, change it for the correct one. Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com> Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-07-26nvme: validate admin queue before unquiesceScott Bauer
With a misbehaving controller it's possible we'll never enter the live state and create an admin queue. When we fail out of reset work it's possible we failed out early enough without setting up the admin queue. We tear down queues after a failed reset, but needed to do some more sanitization. Fixes 443bd90f2cca: "nvme: host: unquiesce queue in nvme_kill_queues()" [ 189.650995] nvme nvme1: pci function 0000:0b:00.0 [ 317.680055] nvme nvme0: Device not ready; aborting reset [ 317.680183] nvme nvme0: Removing after probe failure status: -19 [ 317.681258] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 317.681397] general protection fault: 0000 [#1] SMP KASAN [ 317.682984] CPU: 3 PID: 477 Comm: kworker/3:2 Not tainted 4.13.0-rc1+ #5 [ 317.683112] Hardware name: Gigabyte Technology Co., Ltd. Z170X-UD5/Z170X-UD5-CF, BIOS F5 03/07/2016 [ 317.683284] Workqueue: events nvme_remove_dead_ctrl_work [nvme] [ 317.683398] task: ffff8803b0990000 task.stack: ffff8803c2ef0000 [ 317.683516] RIP: 0010:blk_mq_unquiesce_queue+0x2b/0xa0 [ 317.683614] RSP: 0018:ffff8803c2ef7d40 EFLAGS: 00010282 [ 317.683716] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1006fbdcde3 [ 317.683847] RDX: 0000000000000038 RSI: 1ffff1006f5a9245 RDI: 0000000000000000 [ 317.683978] RBP: ffff8803c2ef7d58 R08: 1ffff1007bcdc974 R09: 0000000000000000 [ 317.684108] R10: 1ffff1007bcdc975 R11: 0000000000000000 R12: 00000000000001c0 [ 317.684239] R13: ffff88037ad49228 R14: ffff88037ad492d0 R15: ffff88037ad492e0 [ 317.684371] FS: 0000000000000000(0000) GS:ffff8803de6c0000(0000) knlGS:0000000000000000 [ 317.684519] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 317.684627] CR2: 0000002d1860c000 CR3: 000000045b40d000 CR4: 00000000003406e0 [ 317.684758] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 317.684888] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 317.685018] Call Trace: [ 317.685084] nvme_kill_queues+0x4d/0x170 [nvme_core] [ 317.685185] nvme_remove_dead_ctrl_work+0x3a/0x90 [nvme] [ 317.685289] process_one_work+0x771/0x1170 [ 317.685372] worker_thread+0xde/0x11e0 [ 317.685452] ? pci_mmcfg_check_reserved+0x110/0x110 [ 317.685550] kthread+0x2d3/0x3d0 [ 317.685617] ? process_one_work+0x1170/0x1170 [ 317.685704] ? kthread_create_on_node+0xc0/0xc0 [ 317.685785] ret_from_fork+0x25/0x30 [ 317.685798] Code: 0f 1f 44 00 00 55 48 b8 00 00 00 00 00 fc ff df 48 89 e5 41 54 4c 8d a7 c0 01 00 00 53 48 89 fb 4c 89 e2 48 c1 ea 03 48 83 ec 08 <80> 3c 02 00 75 50 48 8b bb c0 01 00 00 e8 33 8a f9 00 0f ba b3 [ 317.685872] RIP: blk_mq_unquiesce_queue+0x2b/0xa0 RSP: ffff8803c2ef7d40 [ 317.685908] ---[ end trace a3f8704150b1e8b4 ]--- Signed-off-by: Scott Bauer <scott.bauer@intel.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2017-07-26xfs: fix multi-AG deadlock in xfs_bunmapiChristoph Hellwig
Just like in the allocator we must avoid touching multiple AGs out of order when freeing blocks, as freeing still locks the AGF and can cause the same AB-BA deadlocks as in the allocation path. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Nikolay Borisov <n.borisov.lkml@gmail.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-07-26iommu/amd: Fix schedule-while-atomic BUG in initialization codeJoerg Roedel
The register_syscore_ops() function takes a mutex and might sleep. In the IOMMU initialization code it is invoked during irq-remapping setup already, where irqs are disabled. This causes a schedule-while-atomic bug: BUG: sleeping function called from invalid context at kernel/locking/mutex.c:747 in_atomic(): 0, irqs_disabled(): 1, pid: 1, name: swapper/0 no locks held by swapper/0/1. irq event stamp: 304 hardirqs last enabled at (303): [<ffffffff818a87b6>] _raw_spin_unlock_irqrestore+0x36/0x60 hardirqs last disabled at (304): [<ffffffff8235d440>] enable_IR_x2apic+0x79/0x196 softirqs last enabled at (36): [<ffffffff818ae75f>] __do_softirq+0x35f/0x4ec softirqs last disabled at (31): [<ffffffff810c1955>] irq_exit+0x105/0x120 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.13.0-rc2.1.el7a.test.x86_64.debug #1 Hardware name: PowerEdge C6145 /040N24, BIOS 3.5.0 10/28/2014 Call Trace: dump_stack+0x85/0xca ___might_sleep+0x22a/0x260 __might_sleep+0x4a/0x80 __mutex_lock+0x58/0x960 ? iommu_completion_wait.part.17+0xb5/0x160 ? register_syscore_ops+0x1d/0x70 ? iommu_flush_all_caches+0x120/0x150 mutex_lock_nested+0x1b/0x20 register_syscore_ops+0x1d/0x70 state_next+0x119/0x910 iommu_go_to_state+0x29/0x30 amd_iommu_enable+0x13/0x23 Fix it by moving the register_syscore_ops() call to the next initialization step, which runs with irqs enabled. Reported-by: Artem Savkov <asavkov@redhat.com> Tested-by: Artem Savkov <asavkov@redhat.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Fixes: 2c0ae1720c09 ('iommu/amd: Convert iommu initialization to state machine') Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-07-26media: atomisp2: array underflow in imx_enum_frame_size()Dan Carpenter
The code looks in imx_enum_frame_size() looks like this: 2066 int index = fse->index; 2067 struct imx_device *dev = to_imx_sensor(sd); 2068 2069 mutex_lock(&dev->input_lock); 2070 if (index >= dev->entries_curr_table) { 2071 mutex_unlock(&dev->input_lock); 2072 return -EINVAL; 2073 } 2074 2075 fse->min_width = dev->curr_res_table[index].width; "fse->index" is a u32 that comes from the user. We want negative values of "index" to be -EINVAL so we don't read before the start of the dev->curr_res_table[] array. I've made "entries_curr_table" unsigned long to fix this. I thought about making it unsigned int, but because of struct alignment, it doesn't use more memory either way. Fixes: a49d25364dfb ("staging/atomisp: Add support for the Intel IPU v2") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-07-26media: atomisp2: array underflow in ap1302_enum_frame_size()Dan Carpenter
The problem is this code from ap1302_enum_frame_size(): 738 int index = fse->index; 739 740 mutex_lock(&dev->input_lock); 741 context = ap1302_get_context(sd); 742 if (index >= dev->cntx_res[context].res_num) { 743 mutex_unlock(&dev->input_lock); 744 return -EINVAL; 745 } 746 747 res_table = dev->cntx_res[context].res_table; 748 fse->min_width = res_table[index].width; "fse->index" is a u32 that come from the user. We want negative values of "index" to be treated as -EINVAL but they're not so we can read from before the start of the res_table[] array. I've fixed this by making "res_num" a u32. I made "cur_res" a u32 as well, just for consistency. Fixes: a49d25364dfb ("staging/atomisp: Add support for the Intel IPU v2") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-07-26media: atomisp2: Array underflow in atomisp_enum_input()Dan Carpenter
The problem here is this code from atomisp_enum_input(): 581 int index = input->index; 582 583 if (index >= isp->input_cnt) 584 return -EINVAL; 585 586 if (!isp->inputs[index].camera) 587 return -EINVAL; "input->index" is a u32 which comes from the ioctl. We want negative values of "index" to be counted as -EINVAL but they aren't. I've fixed this by changing the type of "isp->input_cnt" to unsigned int. Fixes: a49d25364dfb ("staging/atomisp: Add support for the Intel IPU v2") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-07-26ASoC: Intel: Skylake: Fix missing sentinels in sst_acpi_machVinod Koul
Couple of instances of sst_acpi_mach were having missing sentinels so add them up Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-07-26media: platform: davinci: drop VPFE_CMD_S_CCDC_RAW_PARAMSPrabhakar Lad
drop VPFE_CMD_S_CCDC_RAW_PARAMS ioctl from dm355/dm644x following reasons: - This ioctl was never in public api and was only defined in kernel header. - The function set_params constantly mixes up pointers and phys_addr_t numbers. - This is part of a 'VPFE_CMD_S_CCDC_RAW_PARAMS' ioctl command that is described as an 'experimental ioctl that will change in future kernels'. - The code to allocate the table never gets called after we copy_from_user the user input over the kernel settings, and then compare them for inequality. - We then go on to use an address provided by user space as both the __user pointer for input and pass it through phys_to_virt to come up with a kernel pointer to copy the data to. This looks like a trivially exploitable root hole. Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-07-26media: platform: davinci: return -EINVAL for VPFE_CMD_S_CCDC_RAW_PARAMS ioctlPrabhakar Lad
this patch makes sure VPFE_CMD_S_CCDC_RAW_PARAMS ioctl no longer works for vpfe_capture driver with a minimal patch suitable for backporting. - This ioctl was never in public api and was only defined in kernel header. - The function set_params constantly mixes up pointers and phys_addr_t numbers. - This is part of a 'VPFE_CMD_S_CCDC_RAW_PARAMS' ioctl command that is described as an 'experimental ioctl that will change in future kernels'. - The code to allocate the table never gets called after we copy_from_user the user input over the kernel settings, and then compare them for inequality. - We then go on to use an address provided by user space as both the __user pointer for input and pass it through phys_to_virt to come up with a kernel pointer to copy the data to. This looks like a trivially exploitable root hole. Due to these reasons we make sure this ioctl now returns -EINVAL and backport this patch as far as possible. Fixes: 5f15fbb68fd7 ("V4L/DVB (12251): v4l: dm644x ccdc module for vpfe capture driver") Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com> Cc: <stable@vger.kernel.org> # for v3.7 and up Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-07-26media: venus: don't abuse dma_alloc for non-DMA allocationsStanimir Varbanov
In venus_boot(), we pass a pointer to a phys_addr_t into dmam_alloc_coherent, which the compiler warns about: platform/qcom/venus/firmware.c: In function 'venus_boot': platform/qcom/venus/firmware.c:63:49: error: passing argument 3 of 'dmam_alloc_coherent' from incompatible pointer type [-Werror=incompatible-pointer-types] To avoid the error refactor venus_boot function by discard dma_alloc_coherent invocation because we don't want to map the memory for the device. Something more, the usage of DMA mapping API is actually wrong and the current implementation relies on several bugs in DMA mapping code. When these bugs are fixed that will break firmware loading, so fix this now to avoid future troubles. The meaning of venus_boot is to copy the content of the firmware buffer into reserved (and memblock removed) block of memory and pass that physical address to the trusted zone for authentication and mapping through iommu form the secure world. After iommu mapping is done the iova is passed as ane entry point to the remote processor. After this change memory-region property is parsed manually and the physical address is memremap to CPU, call mdt_load to load firmware segments into proper places and unmap reserved memory. Fixes: af2c3834c8ca ("[media] media: venus: adding core part and helper functions") Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-07-26media: venus: hfi: fix error handling in hfi_sys_init_done()Rob Clark
Not entirely sure what triggers it, but with venus build as kernel module and in initrd, we hit this crash: Unable to handle kernel paging request at virtual address ffff80003c039000 pgd = ffff00000a14f000 [ffff80003c039000] *pgd=00000000bd9f7003, *pud=00000000bd9f6003, *pmd=00000000bd9f0003, *pte=0000000000000000 Internal error: Oops: 96000007 [#1] SMP Modules linked in: qcom_wcnss_pil(E+) crc32_ce(E) qcom_common(E) venus_core(E+) remoteproc(E) snd_soc_msm8916_digital(E) virtio_ring(E) cdc_ether(E) snd_soc_lpass_apq8016(E) snd_soc_lpass_cpu(E) snd_soc_apq8016_sbc(E) snd_soc_lpass_platform(E) v4l2_mem2mem(E) virtio(E) snd_soc_core(E) ac97_bus(E) snd_pcm_dmaengine(E) snd_seq(E) leds_gpio(E) videobuf2_v4l2(E) videobuf2_core(E) snd_seq_device(E) snd_pcm(E) videodev(E) media(E) nvmem_qfprom(E) msm(E) snd_timer(E) snd(E) soundcore(E) spi_qup(E) mdt_loader(E) qcom_tsens(E) qcom_spmi_temp_alarm(E) nvmem_core(E) msm_rng(E) uas(E) usb_storage(E) dm9601(E) usbnet(E) mii(E) mmc_block(E) adv7511(E) drm_kms_helper(E) syscopyarea(E) sysfillrect(E) sysimgblt(E) fb_sys_fops(E) qcom_spmi_vadc(E) qcom_vadc_common(PE) industrialio(E) pinctrl_spmi_mpp(E) pinctrl_spmi_gpio(E) rtc_pm8xxx(E) clk_smd_rpm(E) sdhci_msm(E) sdhci_pltfm(E) qcom_smd_regulator(E) drm(E) smd_rpm(E) qcom_spmi_pmic(E) regmap_spmi(E) ci_hdrc_msm(E) ci_hdrc(E) usb3503(E) extcon_usb_gpio(E) phy_msm_usb(E) udc_core(E) qcom_hwspinlock(E) extcon_core(E) ehci_msm(E) i2c_qup(E) sdhci(E) mmc_core(E) spmi_pmic_arb(E) spmi(E) qcom_smd(E) smsm(E) rpmsg_core(E) smp2p(E) smem(E) hwspinlock_core(E) gpio_keys(E) CPU: 2 PID: 551 Comm: irq/150-venus Tainted: P E 4.12.0+ #1625 Hardware name: qualcomm dragonboard410c/dragonboard410c, BIOS 2017.07-rc2-00144-ga97bdbdf72-dirty 07/08/2017 task: ffff800037338000 task.stack: ffff800038e00000 PC is at hfi_sys_init_done+0x64/0x140 [venus_core] LR is at hfi_process_msg_packet+0xcc/0x1e8 [venus_core] pc : [<ffff00000118b384>] lr : [<ffff00000118c11c>] pstate: 20400145 sp : ffff800038e03c60 x29: ffff800038e03c60 x28: 0000000000000000 x27: 00000000000df018 x26: ffff00000118f4d0 x25: 0000000000020003 x24: ffff80003a8d3010 x23: ffff00000118f760 x22: ffff800037b40028 x21: ffff8000382981f0 x20: ffff800037b40028 x19: ffff80003c039000 x18: 0000000000000020 x17: 0000000000000000 x16: ffff800037338000 x15: ffffffffffffffff x14: 0000001000000014 x13: 0000000100001007 x12: 0000000100000020 x11: 0000100e00000000 x10: 0000000000000001 x9 : 0000000200000000 x8 : 0000001400000001 x7 : 0000000000001010 x6 : 0000000000000148 x5 : 0000000000001009 x4 : ffff80003c039000 x3 : 00000000cd770abb x2 : 0000000000000042 x1 : 0000000000000788 x0 : 0000000000000002 Process irq/150-venus (pid: 551, stack limit = 0xffff800038e00000) Call trace: [<ffff00000118b384>] hfi_sys_init_done+0x64/0x140 [venus_core] [<ffff00000118c11c>] hfi_process_msg_packet+0xcc/0x1e8 [venus_core] [<ffff00000118a2b4>] venus_isr_thread+0x1b4/0x208 [venus_core] [<ffff00000118e750>] hfi_isr_thread+0x28/0x38 [venus_core] [<ffff000008161550>] irq_thread_fn+0x30/0x70 [<ffff0000081617fc>] irq_thread+0x14c/0x1c8 [<ffff000008105e68>] kthread+0x138/0x140 [<ffff000008083590>] ret_from_fork+0x10/0x40 Code: 52820125 52820207 7a431820 54000249 (b9400263) ---[ end trace c963460f20a984b6 ]--- The problem is that in the error case, we've incremented the data ptr but not decremented rem_bytes, and keep reading (presumably garbage) until eventually we go beyond the end of the buffer. Instead, on first error, we should probably just bail out. Other option is to increment read_bytes by sizeof(u32) before the switch, rather than only accounting for the ptype header in the non-error case. Note that in this case it is HFI_ERR_SYS_INVALID_PARAMETER, ie. an unrecognized/unsupported parameter, so interpreting the next word as a property type would be bogus. The other error cases are due to truncated buffer, so there isn't likely to be anything valid to interpret in the remainder of the buffer. So just bailing seems like a reasonable solution. Signed-off-by: Rob Clark <robdclark@gmail.com> Reviewed-by: Stanimir Varbanov <stanimir.varbanov@linaro.org> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
generated by cgit (git 2.34.1) at 2025-09-12 23:22:53 +0000