- Jan 18, 2018
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Thomas Gleixner authored
Keith reported an issue with vector space exhaustion on a server machine which is caused by the i40e driver allocating 168 MSI interrupts when the driver is initialized, even when most of these interrupts are not used at all. The x86 vector allocation code tries to avoid the immediate allocation with the reservation mode, but the card uses MSI and does not support MSI entry masking, which prevents reservation mode and requires immediate vector allocation. The matrix allocator is a bit naive and prefers the first CPU in the cpumask which describes the possible target CPUs for an allocation. That results in allocating all 168 vectors on CPU0 which later causes vector space exhaustion when the NVMe driver tries to allocate managed interrupts on each CPU for the per CPU queues. Avoid this by finding the CPU which has the lowest vector allocation count to spread out the non managed interrupt accross the possible target CPUs. Fixes: 2f75d9e1 ("genirq: Implement bitmap matrix allocator") Reported-by:
Keith Busch <keith.busch@intel.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Tested-by:
Keith Busch <keith.busch@intel.com> Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801171557330.1777@nanos
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fixes from Ingo Molnar: "Misc fixes: - A rather involved set of memory hardware encryption fixes to support the early loading of microcode files via the initrd. These are larger than what we normally take at such a late -rc stage, but there are two mitigating factors: 1) much of the changes are limited to the SME code itself 2) being able to early load microcode has increased importance in the post-Meltdown/Spectre era. - An IRQ vector allocator fix - An Intel RDT driver use-after-free fix - An APIC driver bug fix/revert to make certain older systems boot again - A pkeys ABI fix - TSC calibration fixes - A kdump fix" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/apic/vector: Fix off by one in error path x86/intel_rdt/cqm: Prevent use after free x86/mm: Encrypt the initrd earlier for BSP microcode update x86/mm: Prepare sme_encrypt_kernel() for PAGE aligned encryption x86/mm: Centralize PMD flags in sme_encrypt_kernel() x86/mm: Use a struct to reduce parameters for SME PGD mapping x86/mm: Clean up register saving in the __enc_copy() assembly code x86/idt: Mark IDT tables __initconst Revert "x86/apic: Remove init_bsp_APIC()" x86/mm/pkeys: Fix fill_sig_info_pkey x86/tsc: Print tsc_khz, when it differs from cpu_khz x86/tsc: Fix erroneous TSC rate on Skylake Xeon x86/tsc: Future-proof native_calibrate_tsc() kdump: Write the correct address of mem_section into vmcoreinfo
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull scheduler fix from Ingo Molnar: "A delayacct statistics correctness fix" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: delayacct: Account blkio completion on the correct task
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 perf fix from Ingo Molnar: "An Intel RAPL events fix" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/rapl: Fix Haswell and Broadwell server RAPL event
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull locking fixes from Ingo Molnar: "Two futex fixes: a input parameters robustness fix, and futex race fixes" * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: futex: Prevent overflow by strengthen input validation futex: Avoid violating the 10th rule of futex
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 pti bits and fixes from Thomas Gleixner: "This last update contains: - An objtool fix to prevent a segfault with the gold linker by changing the invocation order. That's not just for gold, it's a general robustness improvement. - An improved error message for objtool which spares tearing hairs. - Make KASAN fail loudly if there is not enough memory instead of oopsing at some random place later - RSB fill on context switch to prevent RSB underflow and speculation through other units. - Make the retpoline/RSB functionality work reliably for both Intel and AMD - Add retpoline to the module version magic so mismatch can be detected - A small (non-fix) update for cpufeatures which prevents cpu feature clashing for the upcoming extra mitigation bits to ease backporting" * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/t...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull timer fix from Thomas Gleixner: "A one-liner fix which prevents deferrable timers becoming stale when the system does not switch into NOHZ mode" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: timers: Unconditionally check deferrable base
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- Jan 17, 2018
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Thomas Gleixner authored
Keith reported the following warning: WARNING: CPU: 28 PID: 1420 at kernel/irq/matrix.c:222 irq_matrix_remove_managed+0x10f/0x120 x86_vector_free_irqs+0xa1/0x180 x86_vector_alloc_irqs+0x1e4/0x3a0 msi_domain_alloc+0x62/0x130 The reason for this is that if the vector allocation fails the error handling code tries to free the failed vector as well, which causes the above imbalance warning to trigger. Adjust the error path to handle this correctly. Fixes: b5dc8e6c ("x86/irq: Use hierarchical irqdomain to manage CPU interrupt vectors") Reported-by:
Keith Busch <keith.busch@intel.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Tested-by:
Keith Busch <keith.busch@intel.com> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801161217300.1823@nanos
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Thomas Gleixner authored
intel_rdt_iffline_cpu() -> domain_remove_cpu() frees memory first and then proceeds accessing it. BUG: KASAN: use-after-free in find_first_bit+0x1f/0x80 Read of size 8 at addr ffff883ff7c1e780 by task cpuhp/31/195 find_first_bit+0x1f/0x80 has_busy_rmid+0x47/0x70 intel_rdt_offline_cpu+0x4b4/0x510 Freed by task 195: kfree+0x94/0x1a0 intel_rdt_offline_cpu+0x17d/0x510 Do the teardown first and then free memory. Fixes: 24247aee ("x86/intel_rdt/cqm: Improve limbo list processing") Reported-by:
Joseph Salisbury <joseph.salisbury@canonical.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Ravi Shankar <ravi.v.shankar@intel.com> Cc: Peter Zilstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Vikas Shivappa <vikas.shivappa@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: "Roderick W. Smith" <rod.smith@canonical.com> Cc: 1733662@bugs.launchpad.net Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801161957510.2366@nanos
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Andi Kleen authored
Add a marker for retpoline to the module VERMAGIC. This catches the case when a non RETPOLINE compiled module gets loaded into a retpoline kernel, making it insecure. It doesn't handle the case when retpoline has been runtime disabled. Even in this case the match of the retcompile status will be enforced. This implies that even with retpoline run time disabled all modules loaded need to be recompiled. Signed-off-by:
Andi Kleen <ak@linux.intel.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Reviewed-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by:
David Woodhouse <dwmw@amazon.co.uk> Cc: rusty@rustcorp.com.au Cc: arjan.van.de.ven@intel.com Cc: jeyu@kernel.org Cc: torvalds@linux-foundation.org Link: https://lkml.kernel.org/r/20180116205228.4890-1-andi@firstfloor.org
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Paolo Bonzini authored
Processor tracing is already enumerated in word 9 (CPUID[7,0].EBX), so do not duplicate it in the scattered features word. Besides being more tidy, this will be useful for KVM when it presents processor tracing to the guests. KVM selects host features that are supported by both the host kernel (depending on command line options, CPU errata, or whatever) and KVM. Whenever a full feature word exists, KVM's code is written in the expectation that the CPUID bit number matches the X86_FEATURE_* bit number, but this is not the case for X86_FEATURE_INTEL_PT. Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com> Cc: Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luwei Kang <luwei.kang@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: kvm@vger.kernel.org Link: http://lkml.kernel.org/r/1516117345-34561-1-git-send-email-pbonzini@redhat.com Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdmaLinus Torvalds authored
Pull rdma fixes from Doug Ledford: "We had a few more items creep up over the last week. Given we are in -rc8, these are obviously limited to bugs that have a big downside and for which we are certain of the fix. The first is a straight up oops bug that all you have to do is read the code to see it's a guaranteed 100% oops bug. The second is a use-after-free issue. We get away lucky if the queue we are shutting down is empty, but if it isn't, we can end up oopsing. We really need to drain the queue before destroying it. The final one is an issue with bad user input causing us to access our port array out of bounds. While fixing the array out of bounds issue, it was noticed that the original code did the same thing twice (the call to rdma_ah_set_port_num()), so its removal is not balanced by a readd elsewhere, it was already where it needed to be in addition to where it didn't need to be. Summary: - Oops fix in hfi1 driver - use-after-free issue in iser-target - use of user supplied array index without proper checking" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: RDMA/mlx5: Fix out-of-bound access while querying AH IB/hfi1: Prevent a NULL dereference iser-target: Fix possible use-after-free in connection establishment error
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds authored
Pull networking fixes from David Miller: 1) Two read past end of buffer fixes in AF_KEY, from Eric Biggers. 2) Memory leak in key_notify_policy(), from Steffen Klassert. 3) Fix overflow with bpf arrays, from Daniel Borkmann. 4) Fix RDMA regression with mlx5 due to mlx5 no longer using pci_irq_get_affinity(), from Saeed Mahameed. 5) Missing RCU read locking in nl80211_send_iface() when it calls ieee80211_bss_get_ie(), from Dominik Brodowski. 6) cfg80211 should check dev_set_name()'s return value, from Johannes Berg. 7) Missing module license tag in 9p protocol, from Stephen Hemminger. 8) Fix crash due to too small MTU in udp ipv6 sendmsg, from Mike Maloney. 9) Fix endless loop in netlink extack code, from David Ahern. 10) TLS socket layer sets inverted error codes, resulting in an endless loop. From Robert Hering. 11) Revert openvswitch erspan tunnel support, it's mis-designed and we need to kill it before it goes into a real release. From William Tu. 12) Fix lan78xx failures in full speed USB mode, from Yuiko Oshino. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (54 commits) net, sched: fix panic when updating miniq {b,q}stats qed: Fix potential use-after-free in qed_spq_post() nfp: use the correct index for link speed table lan78xx: Fix failure in USB Full Speed sctp: do not allow the v4 socket to bind a v4mapped v6 address sctp: return error if the asoc has been peeled off in sctp_wait_for_sndbuf sctp: reinit stream if stream outcnt has been change by sinit in sendmsg ibmvnic: Fix pending MAC address changes netlink: extack: avoid parenthesized string constant warning ipv4: Make neigh lookup keys for loopback/point-to-point devices be INADDR_ANY net: Allow neigh contructor functions ability to modify the primary_key sh_eth: fix dumping ARSTR Revert "openvswitch: Add erspan tunnel support." net/tls: Fix inverted error codes to avoid endless loop ipv6: ip6_make_skb() needs to clear cork.base.dst sctp: avoid compiler warning on implicit fallthru net: ipv4: Make "ip route get" match iif lo rules again. netlink: extack needs to be reset each time through loop tipc: fix a memory leak in tipc_nl_node_get_link() ipv6: fix udpv6 sendmsg crash caused by too small MTU ...
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/soundLinus Torvalds authored
Pull sound fixes from Takashi Iwai: "A few small last-minute fixes that should sneak into 4.15: - remove a spurious WARN_ON() triggered by syzkaller - fix for ioctl races in ALSA sequencer - two trivial HD-audio fixup entries" * tag 'sound-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: seq: Make ioctls race-free ALSA: pcm: Remove yet superfluous WARN_ON() ALSA: hda - Apply the existing quirk to iMac 14,1 ALSA: hda - Apply headphone noise quirk for another Dell XPS 13 variant
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-traceLinus Torvalds authored
Pull tracing fixes from Steven Rostedt: - Bring back context level recursive protection in ring buffer. The simpler counter protection failed, due to a path when tracing with trace_clock_global() as it could not be reentrant and depended on the ring buffer recursive protection to keep that from happening. - Prevent branch profiling when FORTIFY_SOURCE is enabled. It causes 50 - 60 MB in warning messages. Branch profiling should never be run on production systems, so there's no reason that it needs to be enabled with FORTIFY_SOURCE. * tag 'trace-v4.15-rc4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing: Prevent PROFILE_ALL_BRANCHES when FORTIFY_SOURCE=y ring-buffer: Bring back context level recursive checks
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Daniel Borkmann authored
While working on fixing another bug, I ran into the following panic on arm64 by simply attaching clsact qdisc, adding a filter and running traffic on ingress to it: [...] [ 178.188591] Unable to handle kernel read from unreadable memory at virtual address 810fb501f000 [ 178.197314] Mem abort info: [ 178.200121] ESR = 0x96000004 [ 178.203168] Exception class = DABT (current EL), IL = 32 bits [ 178.209095] SET = 0, FnV = 0 [ 178.212157] EA = 0, S1PTW = 0 [ 178.215288] Data abort info: [ 178.218175] ISV = 0, ISS = 0x00000004 [ 178.222019] CM = 0, WnR = 0 [ 178.224997] user pgtable: 4k pages, 48-bit VAs, pgd = 0000000023cb3f33 [ 178.231531] [0000810fb501f000] *pgd=0000000000000000 [ 178.236508] Internal error: Oops: 96000004 [#1] SMP [...] [ 178.311855] CPU: 73 PID: 2497 Comm: ping Tainted: G W 4.15.0-rc7+ #5 [ 178.319413] Hardware name: FOXCONN R2-1221R-A4/C2U4N_MB, BIOS G31FB18A 03/31/2017 [ 178.326887] pstate: 60400005 (nZCv daif +PAN -UAO) [ 178.331685] pc : __netif_receive_skb_core+0x49c/0xac8 [ 178.336728] lr : __netif_receive_skb+0x28/0x78 [ 178.341161] sp : ffff00002344b750 [ 178.344465] x29: ffff00002344b750 x28: ffff810fbdfd0580 [ 178.349769] x27: 0000000000000000 x26: ffff000009378000 [...] [ 178.418715] x1 : 0000000000000054 x0 : 0000000000000000 [ 178.424020] Process ping (pid: 2497, stack limit = 0x000000009f0a3ff4) [ 178.430537] Call trace: [ 178.432976] __netif_receive_skb_core+0x49c/0xac8 [ 178.437670] __netif_receive_skb+0x28/0x78 [ 178.441757] process_backlog+0x9c/0x160 [ 178.445584] net_rx_action+0x2f8/0x3f0 [...] Reason is that sch_ingress and sch_clsact are doing mini_qdisc_pair_init() which sets up miniq pointers to cpu_{b,q}stats from the underlying qdisc. Problem is that this cannot work since they are actually set up right after the qdisc ->init() callback in qdisc_create(), so first packet going into sch_handle_ingress() tries to call mini_qdisc_bstats_cpu_update() and we therefore panic. In order to fix this, allocation of {b,q}stats needs to happen before we call into ->init(). In net-next, there's already such option through commit d59f5ffa ("net: sched: a dflt qdisc may be used with per cpu stats"). However, the bug needs to be fixed in net still for 4.15. Thus, include these bits to reduce any merge churn and reuse the static_flags field to set TCQ_F_CPUSTATS, and remove the allocation from qdisc_create() since there is no other user left. Prashant Bhole ran into the same issue but for net-next, thus adding him below as well as co-author. Same issue was also reported by Sandipan Das when using bcc. Fixes: 46209401 ("net: core: introduce mini_Qdisc and eliminate usage of tp->q for clsact fastpath") Reference: https://lists.iovisor.org/pipermail/iovisor-dev/2018-January/001190.html Reported-by:
Sandipan Das <sandipan@linux.vnet.ibm.com> Co-authored-by:
Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp> Co-authored-by:
John Fastabend <john.fastabend@gmail.com> Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Roland Dreier authored
We need to check if p_ent->comp_mode is QED_SPQ_MODE_EBLOCK before calling qed_spq_add_entry(). The test is fine is the mode is EBLOCK, but if it isn't then qed_spq_add_entry() might kfree(p_ent). Signed-off-by:
Roland Dreier <roland@purestorage.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jakub Kicinski authored
sts variable is holding link speed as well as state. We should be using ls to index into ls_to_ethtool. Fixes: 265aeb51 ("nfp: add support for .get_link_ksettings()") Signed-off-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Yuiko Oshino authored
Fix initialize the uninitialized tx_qlen to an appropriate value when USB Full Speed is used. Fixes: 55d7de9d ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver") Signed-off-by:
Yuiko Oshino <yuiko.oshino@microchip.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Merge tag 'mac80211-for-davem-2018-01-15' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 Johannes Berg says: ==================== More fixes: * hwsim: - properly flush deletion works at module unload - validate # of channels passed from userspace * cfg80211: - fix RCU locking regression - initialize on-stack channel data for nl80211 event - check dev_set_name() return value ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Xin Long authored
The check in sctp_sockaddr_af is not robust enough to forbid binding a v4mapped v6 addr on a v4 socket. The worse thing is that v4 socket's bind_verify would not convert this v4mapped v6 addr to a v4 addr. syzbot even reported a crash as the v4 socket bound a v6 addr. This patch is to fix it by doing the common sa.sa_family check first, then AF_INET check for v4mapped v6 addrs. Fixes: 7dab83de ("sctp: Support ipv6only AF_INET6 sockets.") Reported-by:
<syzbot+7b7b518b1228d2743963@syzkaller.appspotmail.com> Acked-by:
Neil Horman <nhorman@tuxdriver.com> Signed-off-by:
Xin Long <lucien.xin@gmail.com> Acked-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Xin Long authored
After commit cea0cc80 ("sctp: use the right sk after waking up from wait_buf sleep"), it may change to lock another sk if the asoc has been peeled off in sctp_wait_for_sndbuf. However, the asoc's new sk could be already closed elsewhere, as it's in the sendmsg context of the old sk that can't avoid the new sk's closing. If the sk's last one refcnt is held by this asoc, later on after putting this asoc, the new sk will be freed, while under it's own lock. This patch is to revert that commit, but fix the old issue by returning error under the old sk's lock. Fixes: cea0cc80 ("sctp: use the right sk after waking up from wait_buf sleep") Reported-by:
<syzbot+ac6ea7baa4432811eb50@syzkaller.appspotmail.com> 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>
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Xin Long authored
After introducing sctp_stream structure, sctp uses stream->outcnt as the out stream nums instead of c.sinit_num_ostreams. However when users use sinit in cmsg, it only updates c.sinit_num_ostreams in sctp_sendmsg. At that moment, stream->outcnt is still using previous value. If it's value is not updated, the sinit_num_ostreams of sinit could not really work. This patch is to fix it by updating stream->outcnt and reiniting stream if stream outcnt has been change by sinit in sendmsg. Fixes: a8386317 ("sctp: prepare asoc stream for stream reconf") Signed-off-by:
Xin Long <lucien.xin@gmail.com> Acked-by:
Neil Horman <nhorman@tuxdriver.com> Acked-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Thomas Falcon authored
Due to architecture limitations, the IBM VNIC client driver is unable to perform MAC address changes unless the device has "logged in" to its backing device. Currently, pending MAC changes are handled before login, resulting in an error and failure to change the MAC address. Moving that chunk to the end of the ibmvnic_login function, when we are sure that it was successful, fixes that. The MAC address can be changed when the device is up or down, so only check if the device is in a "PROBED" state before setting the MAC address. Fixes: c26eba03 ("ibmvnic: Update reset infrastructure to support tunable parameters") Signed-off-by:
Thomas Falcon <tlfalcon@linux.vnet.ibm.com> Reviewed-by:
John Allen <jallen@linux.vnet.ibm.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- Jan 16, 2018
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Josh Snyder authored
Before commit: e33a9bba ("sched/core: move IO scheduling accounting from io_schedule_timeout() into scheduler") delayacct_blkio_end() was called after context-switching into the task which completed I/O. This resulted in double counting: the task would account a delay both waiting for I/O and for time spent in the runqueue. With e33a9bba , delayacct_blkio_end() is called by try_to_wake_up(). In ttwu, we have not yet context-switched. This is more correct, in that the delay accounting ends when the I/O is complete. But delayacct_blkio_end() relies on 'get_current()', and we have not yet context-switched into the task whose I/O completed. This results in the wrong task having its delay accounting statistics updated. Instead of doing that, pass the task_struct being woken to delayacct_blkio_end(), so that it can update the statistics of the correct task. Signed-off-by:
Josh Snyder <joshs@netflix.com> Acked-by:
Tejun Heo <tj@kernel.org> Acked-by:
Balbir Singh <bsingharora@gmail.com> Cc: <stable@vger.kernel.org> Cc: Brendan Gregg <bgregg@netflix.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-block@vger.kernel.org Fixes: e33a9bba ("sched/core: move IO scheduling accounting from io_schedule_timeout() into scheduler") Link: http://lkml.kernel.org/r/1513613712-571-1-git-send-email-joshs@netflix.com Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Tom Lendacky authored
Currently the BSP microcode update code examines the initrd very early in the boot process. If SME is active, the initrd is treated as being encrypted but it has not been encrypted (in place) yet. Update the early boot code that encrypts the kernel to also encrypt the initrd so that early BSP microcode updates work. Tested-by:
Gabriel Craciunescu <nix.or.die@gmail.com> Signed-off-by:
Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by:
Borislav Petkov <bp@suse.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20180110192634.6026.10452.stgit@tlendack-t1.amdoffice.net Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Tom Lendacky authored
In preparation for encrypting more than just the kernel, the encryption support in sme_encrypt_kernel() needs to support 4KB page aligned encryption instead of just 2MB large page aligned encryption. Update the routines that populate the PGD to support non-2MB aligned addresses. This is done by creating PTE page tables for the start and end portion of the address range that fall outside of the 2MB alignment. This results in, at most, two extra pages to hold the PTE entries for each mapping of a range. Tested-by:
Gabriel Craciunescu <nix.or.die@gmail.com> Signed-off-by:
Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by:
Borislav Petkov <bp@suse.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20180110192626.6026.75387.stgit@tlendack-t1.amdoffice.net Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Tom Lendacky authored
In preparation for encrypting more than just the kernel during early boot processing, centralize the use of the PMD flag settings based on the type of mapping desired. When 4KB aligned encryption is added, this will allow either PTE flags or large page PMD flags to be used without requiring the caller to adjust. Tested-by:
Gabriel Craciunescu <nix.or.die@gmail.com> Signed-off-by:
Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by:
Borislav Petkov <bp@suse.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20180110192615.6026.14767.stgit@tlendack-t1.amdoffice.net Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Tom Lendacky authored
In preparation for follow-on patches, combine the PGD mapping parameters into a struct to reduce the number of function arguments and allow for direct updating of the next pagetable mapping area pointer. Tested-by:
Gabriel Craciunescu <nix.or.die@gmail.com> Signed-off-by:
Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by:
Borislav Petkov <bp@suse.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20180110192605.6026.96206.stgit@tlendack-t1.amdoffice.net Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Tom Lendacky authored
Clean up the use of PUSH and POP and when registers are saved in the __enc_copy() assembly function in order to improve the readability of the code. Move parameter register saving into general purpose registers earlier in the code and move all the pushes to the beginning of the function with corresponding pops at the end. We do this to prepare fixes. Tested-by:
Gabriel Craciunescu <nix.or.die@gmail.com> Signed-off-by:
Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by:
Borislav Petkov <bp@suse.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20180110192556.6026.74187.stgit@tlendack-t1.amdoffice.net Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Josh Poimboeuf authored
If a nonexistent file is supplied to objtool, it complains with a non-helpful error: open: No such file or directory Improve it to: objtool: Can't open 'foo': No such file or directory Reported-by:
Markus <M4rkusXXL@web.de> Signed-off-by:
Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/406a3d00a21225eee2819844048e17f68523ccf6.1516025651.git.jpoimboe@redhat.com Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Josh Poimboeuf authored
Objtool segfaults when the gold linker is used with CONFIG_MODVERSIONS=y and CONFIG_UNWINDER_ORC=y. With CONFIG_MODVERSIONS=y, the .o file gets passed to the linker before being passed to objtool. The gold linker seems to strip unused ELF symbols by default, which confuses objtool and causes the seg fault when it's trying to generate ORC metadata. Objtool should really be running immediately after GCC anyway, without a linker call in between. Change the makefile ordering so that objtool is called before the linker. Reported-and-tested-by:
Markus <M4rkusXXL@web.de> Signed-off-by:
Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: ee9f8fce ("x86/unwind: Add the ORC unwinder") Link: http://lkml.kernel.org/r/355f04da33581f4a3bf82e5b512973624a1e23a2.1516025651.git.jpoimboe@redhat.com Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Leon Romanovsky authored
The rdma_ah_find_type() accesses the port array based on an index controlled by userspace. The existing bounds check is after the first use of the index, so userspace can generate an out of bounds access, as shown by the KASN report below. ================================================================== BUG: KASAN: slab-out-of-bounds in to_rdma_ah_attr+0xa8/0x3b0 Read of size 4 at addr ffff880019ae2268 by task ibv_rc_pingpong/409 CPU: 0 PID: 409 Comm: ibv_rc_pingpong Not tainted 4.15.0-rc2-00031-gb60a3faf5b83-dirty #3 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014 Call Trace: dump_stack+0xe9/0x18f print_address_description+0xa2/0x350 kasan_report+0x3a5/0x400 to_rdma_ah_attr+0xa8/0x3b0 mlx5_ib_query_qp+0xd35/0x1330 ib_query_qp+0x8a/0xb0 ib_uverbs_query_qp+0x237/0x7f0 ib_uverbs_write+0x617/0xd80 __vfs_write+0xf7/0x500 vfs_write+0x149/0x310 SyS_write+0xca/0x190 entry_SYSCALL_64_fastpath+0x18/0x85 RIP: 0033:0x7fe9c7a275a0 RSP: 002b:00007ffee5498738 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fe9c7ce4b00 RCX: 00007fe9c7a275a0 RDX: 0000000000000018 RSI: 00007ffee5498800 RDI: 0000000000000003 RBP: 000055d0c8d3f010 R08: 00007ffee5498800 R09: 0000000000000018 R10: 00000000000000ba R11: 0000000000000246 R12: 0000000000008000 R13: 0000000000004fb0 R14: 000055d0c8d3f050 R15: 00007ffee5498560 Allocated by task 1: __kmalloc+0x3f9/0x430 alloc_mad_private+0x25/0x50 ib_mad_post_receive_mads+0x204/0xa60 ib_mad_init_device+0xa59/0x1020 ib_register_device+0x83a/0xbc0 mlx5_ib_add+0x50e/0x5c0 mlx5_add_device+0x142/0x410 mlx5_register_interface+0x18f/0x210 mlx5_ib_init+0x56/0x63 do_one_initcall+0x15b/0x270 kernel_init_freeable+0x2d8/0x3d0 kernel_init+0x14/0x190 ret_from_fork+0x24/0x30 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff880019ae2000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 104 bytes to the right of 512-byte region [ffff880019ae2000, ffff880019ae2200) The buggy address belongs to the page: page:000000005d674e18 count:1 mapcount:0 mapping: (null) index:0x0 compound_mapcount: 0 flags: 0x4000000000008100(slab|head) raw: 4000000000008100 0000000000000000 0000000000000000 00000001000c000c raw: dead000000000100 dead000000000200 ffff88001a402000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff880019ae2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff880019ae2180: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc >ffff880019ae2200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff880019ae2280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff880019ae2300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Disabling lock debugging due to kernel taint Cc: <stable@vger.kernel.org> Fixes: 44c58487 ("IB/core: Define 'ib' and 'roce' rdma_ah_attr types") Signed-off-by:
Leon Romanovsky <leonro@mellanox.com> Signed-off-by:
Jason Gunthorpe <jgg@mellanox.com>
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Johannes Berg authored
NL_SET_ERR_MSG() and NL_SET_ERR_MSG_ATTR() lead to the following warning in newer versions of gcc: warning: array initialized from parenthesized string constant Just remove the parentheses, they're not needed in this context since anyway since there can be no operator precendence issues or similar. Signed-off-by:
Johannes Berg <johannes.berg@intel.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Jim Westfall says: ==================== ipv4: Make neigh lookup keys for loopback/point-to-point devices be INADDR_ANY This used to be the previous behavior in older kernels but became broken in a263b309 (ipv4: Make neigh lookups directly in output packet path) and then later removed because it was broken in 0bb4087c (ipv4: Fix neigh lookup keying over loopback/point-to-point devices) Not having this results in there being an arp entry for every remote ip address that the device talks to. Given a fairly active device it can cause the arp table to become huge and/or having to add/purge large number of entires to keep within table size thresholds. $ ip -4 neigh show nud noarp | grep tun | wc -l 55850 $ lnstat -k arp_cache:entries,arp_cache:allocs,arp_cache:destroys -c 10 arp_cach|arp_cach|arp_cach| entries| allocs|destroys| 81493|620166816|620126069| 101867| 10186| 0| 113854| 5993| 0| 118773| 2459| 0| 27937| 18579| 63998| 39256| 5659| 0| 56231| 8487| 0| 65602| 4685| 0| 79697| 7047| 0| 90733| 5517| 0| v2: - fixes coding style issues ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jim Westfall authored
Map all lookup neigh keys to INADDR_ANY for loopback/point-to-point devices to avoid making an entry for every remote ip the device needs to talk to. This used the be the old behavior but became broken in a263b309 (ipv4: Make neigh lookups directly in output packet path) and later removed in 0bb4087c (ipv4: Fix neigh lookup keying over loopback/point-to-point devices) because it was broken. Signed-off-by:
Jim Westfall <jwestfall@surrealistic.net> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jim Westfall authored
Use n->primary_key instead of pkey to account for the possibility that a neigh constructor function may have modified the primary_key value. Signed-off-by:
Jim Westfall <jwestfall@surrealistic.net> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Sergei Shtylyov authored
ARSTR is always located at the start of the TSU register region, thus using add_reg() instead of add_tsu_reg() in __sh_eth_get_regs() to dump it causes EDMR or EDSR (depending on the register layout) to be dumped instead of ARSTR. Use the correct condition/macro there... Fixes: 6b4b4fea ("sh_eth: Implement ethtool register dump operations") Signed-off-by:
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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William Tu authored
This reverts commit ceaa001a . The OVS_TUNNEL_KEY_ATTR_ERSPAN_OPTS attr should be designed as a nested attribute to support all ERSPAN v1 and v2's fields. The current attr is a be32 supporting only one field. Thus, this patch reverts it and later patch will redo it using nested attr. Signed-off-by:
William Tu <u9012063@gmail.com> Cc: Jiri Benc <jbenc@redhat.com> Cc: Pravin Shelar <pshelar@ovn.org> Acked-by:
Jiri Benc <jbenc@redhat.com> Acked-by:
Pravin B Shelar <pshelar@ovn.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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r.hering@avm.de authored
sendfile() calls can hang endless with using Kernel TLS if a socket error occurs. Socket error codes must be inverted by Kernel TLS before returning because they are stored with positive sign. If returned non-inverted they are interpreted as number of bytes sent, causing endless looping of the splice mechanic behind sendfile(). Signed-off-by:
Robert Hering <r.hering@avm.de> Signed-off-by:
David S. Miller <davem@davemloft.net>
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