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Mike Marciniszyn de427b662b IB/hfi1: Fix probe time panic when AIP is enabled with a buggy BIOS 
commit 5de61a47eb upstream.

A panic can result when AIP is enabled:

  BUG: unable to handle kernel NULL pointer dereference at 000000000000000
  PGD 0 P4D 0
  Oops: 0000 1 SMP PTI
  CPU: 70 PID: 981 Comm: systemd-udevd Tainted: G OE --------- - - 4.18.0-240.el8.x86_64 #1
  Hardware name: Intel Corporation S2600KP/S2600KP, BIOS SE5C610.86B.01.01.0005.101720141054 10/17/2014
  RIP: 0010:__bitmap_and+0x1b/0x70
  RSP: 0018:ffff99aa0845f9f0 EFLAGS: 00010246
  RAX: 0000000000000000 RBX: ffff8d5a6fc18000 RCX: 0000000000000048
  RDX: 0000000000000000 RSI: ffffffffc06336f0 RDI: ffff8d5a8fa67750
  RBP: 0000000000000079 R08: 0000000fffffffff R09: 0000000000000000
  R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffc06336f0
  R13: 00000000000000a0 R14: ffff8d5a6fc18000 R15: 0000000000000003
  FS: 00007fec137a5980(0000) GS:ffff8d5a9fa80000(0000) knlGS:0000000000000000
  CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000000000000000 CR3: 0000000a04b48002 CR4: 00000000001606e0
  Call Trace:
  hfi1_num_netdev_contexts+0x7c/0x110 [hfi1]
  hfi1_init_dd+0xd7f/0x1a90 [hfi1]
  ? pci_bus_read_config_dword+0x49/0x70
  ? pci_mmcfg_read+0x3e/0xe0
  do_init_one.isra.18+0x336/0x640 [hfi1]
  local_pci_probe+0x41/0x90
  pci_device_probe+0x105/0x1c0
  really_probe+0x212/0x440
  driver_probe_device+0x49/0xc0
  device_driver_attach+0x50/0x60
  __driver_attach+0x61/0x130
  ? device_driver_attach+0x60/0x60
  bus_for_each_dev+0x77/0xc0
  ? klist_add_tail+0x3b/0x70
  bus_add_driver+0x14d/0x1e0
  ? dev_init+0x10b/0x10b [hfi1]
  driver_register+0x6b/0xb0
  ? dev_init+0x10b/0x10b [hfi1]
  hfi1_mod_init+0x1e6/0x20a [hfi1]
  do_one_initcall+0x46/0x1c3
  ? free_unref_page_commit+0x91/0x100
  ? _cond_resched+0x15/0x30
  ? kmem_cache_alloc_trace+0x140/0x1c0
  do_init_module+0x5a/0x220
  load_module+0x14b4/0x17e0
  ? __do_sys_finit_module+0xa8/0x110
  __do_sys_finit_module+0xa8/0x110
  do_syscall_64+0x5b/0x1a0

The issue happens when pcibus_to_node() returns NO_NUMA_NODE.

Fix this issue by moving the initialization of dd->node to hfi1_devdata
allocation and remove the other pcibus_to_node() calls in the probe path
and use dd->node instead.

Affinity logic is adjusted to use a new field dd->affinity_entry as a
guard instead of dd->node.

Fixes: 4730f4a6c6 ("IB/hfi1: Activate the dummy netdev")
Link: https://lore.kernel.org/r/1617025700-31865-4-git-send-email-dennis.dalessandro@cornelisnetworks.com
Cc: stable@vger.kernel.org
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2021-04-14 08:41:58 +02:00
arch ACPI: processor: Fix build when CONFIG_ACPI_PROCESSOR=m 2021-04-14 08:41:58 +02:00
block block: recalculate segment count for multi-segment discards correctly 2021-03-30 14:32:06 +02:00
certs certs: Fix blacklist flag type confusion 2021-03-04 11:37:59 +01:00
crypto crypto: mips/poly1305 - enable for all MIPS processors 2021-03-17 17:06:10 +01:00
Documentation KVM: x86: Protect userspace MSR filter with SRCU, and set atomically-ish 2021-03-30 14:31:53 +02:00
drivers IB/hfi1: Fix probe time panic when AIP is enabled with a buggy BIOS 2021-04-14 08:41:58 +02:00
fs io_uring: fix timeout cancel return code 2021-04-10 13:36:10 +02:00
include soc: qcom-geni-se: Cleanup the code to remove proxy votes 2021-04-07 15:00:13 +02:00
init init/Kconfig: make COMPILE_TEST depend on HAS_IOMEM 2021-04-10 13:36:11 +02:00
ipc ipc: adjust proc_ipc_sem_dointvec definition to match prototype 2020-09-05 12:14:29 -07:00
kernel Revert "kernel: freezer should treat PF_IO_WORKER like PF_KTHREAD for freezing" 2021-04-07 15:00:14 +02:00
lib math: Export mul_u64_u64_div_u64 2021-04-10 13:36:10 +02:00
LICENSES LICENSES/deprecated: add Zlib license text 2020-09-16 14:33:49 +02:00
mm mm: fix race by making init_zero_pfn() early_initcall 2021-04-07 15:00:10 +02:00
net net: ipv6: check for validity before dereferencing cfg->fc_nlinfo.nlh 2021-04-14 08:41:57 +02:00
samples samples, bpf: Add missing munmap in xdpsock 2021-03-17 17:06:12 +01:00
scripts kbuild: dummy-tools: fix inverted tests for gcc 2021-03-30 14:31:50 +02:00
security selinux: fix race between old and new sidtab 2021-04-14 08:41:57 +02:00
sound ASoC: intel: atom: Stop advertising non working S24LE support 2021-04-14 08:41:56 +02:00
tools tools/resolve_btfids: Add /libbpf to .gitignore 2021-04-10 13:36:10 +02:00
usr Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-08-07 13:29:39 -07:00
virt KVM: Use kvm_pfn_t for local PFN variable in hva_to_pfn_remapped() 2021-02-26 10:13:01 +01:00
.clang-format RDMA 5.10 pull request 2020-10-17 11:18:18 -07:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: docs: ignore sphinx_*/ directories 2020-09-10 10:44:31 -06:00
.mailmap mailmap: add two more addresses of Uwe Kleine-König 2020-12-06 10:19:07 -08:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Jason Cooper to CREDITS 2020-11-30 10:20:34 +01:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: move the staging subsystem to lists.linux.dev 2021-03-25 09:04:18 +01:00
Makefile Linux 5.10.29 2021-04-10 13:36:11 +02:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.