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Michal Schmidt d9b9affd10 RDMA/irdma: avoid invalid read in irdma_net_event 
[ Upstream commit 6f05611728 ]

irdma_net_event() should not dereference anything from "neigh" (alias
"ptr") until it has checked that the event is NETEVENT_NEIGH_UPDATE.
Other events come with different structures pointed to by "ptr" and they
may be smaller than struct neighbour.

Move the read of neigh->dev under the NETEVENT_NEIGH_UPDATE case.

The bug is mostly harmless, but it triggers KASAN on debug kernels:

 BUG: KASAN: stack-out-of-bounds in irdma_net_event+0x32e/0x3b0 [irdma]
 Read of size 8 at addr ffffc900075e07f0 by task kworker/27:2/542554

 CPU: 27 PID: 542554 Comm: kworker/27:2 Kdump: loaded Not tainted 5.14.0-630.el9.x86_64+debug #1
 Hardware name: [...]
 Workqueue: events rt6_probe_deferred
 Call Trace:
  <IRQ>
  dump_stack_lvl+0x60/0xb0
  print_address_description.constprop.0+0x2c/0x3f0
  print_report+0xb4/0x270
  kasan_report+0x92/0xc0
  irdma_net_event+0x32e/0x3b0 [irdma]
  notifier_call_chain+0x9e/0x180
  atomic_notifier_call_chain+0x5c/0x110
  rt6_do_redirect+0xb91/0x1080
  tcp_v6_err+0xe9b/0x13e0
  icmpv6_notify+0x2b2/0x630
  ndisc_redirect_rcv+0x328/0x530
  icmpv6_rcv+0xc16/0x1360
  ip6_protocol_deliver_rcu+0xb84/0x12e0
  ip6_input_finish+0x117/0x240
  ip6_input+0xc4/0x370
  ipv6_rcv+0x420/0x7d0
  __netif_receive_skb_one_core+0x118/0x1b0
  process_backlog+0xd1/0x5d0
  __napi_poll.constprop.0+0xa3/0x440
  net_rx_action+0x78a/0xba0
  handle_softirqs+0x2d4/0x9c0
  do_softirq+0xad/0xe0
  </IRQ>

Fixes: 915cc7ac0f ("RDMA/irdma: Add miscellaneous utility definitions")
Link: https://patch.msgid.link/r/20251127143150.121099-1-mschmidt@redhat.com
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-01-08 10:16:49 +01:00
arch powerpc/tools: drop -o pipefail in gcc check scripts 2026-01-08 10:16:44 +01:00
block block: freeze queue when updating zone resources 2026-01-02 12:57:31 +01:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: seqiv - Do not use req->iv after crypto_aead_encrypt 2026-01-08 10:16:43 +01:00
Documentation dt-bindings: PCI: qcom,pcie-sm8550: Add missing required power-domains and resets 2026-01-02 12:57:27 +01:00
drivers RDMA/irdma: avoid invalid read in irdma_net_event 2026-01-08 10:16:49 +01:00
fs fuse: missing copy_finish in fuse-over-io-uring argument copies 2026-01-02 12:57:31 +01:00
include RDMA/irdma: Fix irdma_alloc_ucontext_resp padding 2026-01-08 10:16:49 +01:00
init printk changes for 6.18 2025-10-04 11:13:11 -07:00
io_uring io_uring/rsrc: fix lost entries after cloned range 2026-01-02 12:57:30 +01:00
ipc namespace-6.18-rc1 2025-09-29 11:20:29 -07:00
kernel cpuset: fix warning when disabling remote partition 2026-01-08 10:16:43 +01:00
lib lib/crypto: riscv: Depend on RISCV_EFFICIENT_VECTOR_UNALIGNED_ACCESS 2026-01-02 12:57:29 +01:00
LICENSES LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2 2025-07-24 11:15:39 +02:00
mm mm/huge_memory: merge uniform_split_supported() and non_uniform_split_supported() 2026-01-08 10:16:41 +01:00
net ipv6: fix a BUG in rt6_get_pcpu_route() under PREEMPT_RT 2026-01-08 10:16:49 +01:00
rust rust: io: add typedef for phys_addr_t 2026-01-02 12:57:05 +01:00
samples samples: rust: fix endianness issue in rust_driver_pci 2026-01-02 12:57:05 +01:00
scripts mcb: Add missing modpost build support 2026-01-08 10:16:47 +01:00
security tpm2-sessions: Fix out of range indexing in name_size 2026-01-02 12:57:11 +01:00
sound ASoC: SOF: ipc4-topology: Convert FLOAT to S32 during blob selection 2026-01-02 12:57:24 +01:00
tools tools/sched_ext: fix scx_show_state.py for scx_root change 2026-01-08 10:16:48 +01:00
usr gen_init_cpio: Ignore fsync() returning EINVAL on pipes 2025-10-07 09:53:05 -07:00
virt KVM: Fix last_boosted_vcpu index assignment bug 2026-01-02 12:57:21 +01:00
.clang-format memblock: drop for_each_free_mem_pfn_range_in_zone_from() 2025-09-14 08:49:03 +03:00
.clippy.toml rust: clean Rust 1.88.0's warning about clippy::disallowed_macros configuration 2025-05-07 00:11:47 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: remove Alyssa Rosenzweig 2025-09-18 21:17:31 +02:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore .gitignore: ignore compile_commands.json globally 2025-08-12 15:53:55 -07:00
.mailmap 8 hotfixes. 4 are cc:stable, 7 are against mm/. 2025-11-26 12:38:05 -08:00
.pylintrc tools: docs: parse-headers.py: move it from sphinx dir 2025-08-29 15:54:42 -06:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: mark ISDN subsystem as orphan 2025-10-27 17:49:45 -07:00
Kbuild sched: Make migrate_{en,dis}able() inline 2025-09-25 09:57:16 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS soc: fixes for 6.18, part 4 2025-11-28 09:57:31 -08:00
Makefile Linux 6.18.3 2026-01-02 12:57:31 +01:00
README README: Fix spelling 2024-03-18 03:36:32 -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 reStructuredText 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.