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Eric Dumazet ef68afb1be bonding: limit BOND_MODE_8023AD to Ethernet devices
[ Upstream commit c84fcb79e5 ]

BOND_MODE_8023AD makes sense for ARPHRD_ETHER only.

syzbot reported:

 BUG: KASAN: global-out-of-bounds in __hw_addr_create net/core/dev_addr_lists.c:63 [inline]
 BUG: KASAN: global-out-of-bounds in __hw_addr_add_ex+0x25d/0x760 net/core/dev_addr_lists.c:118
Read of size 16 at addr ffffffff8bf94040 by task syz.1.3580/19497

CPU: 1 UID: 0 PID: 19497 Comm: syz.1.3580 Tainted: G             L      syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
  dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
  print_address_description mm/kasan/report.c:378 [inline]
  print_report+0xca/0x240 mm/kasan/report.c:482
  kasan_report+0x118/0x150 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
  kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:200
  __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105
  __hw_addr_create net/core/dev_addr_lists.c:63 [inline]
  __hw_addr_add_ex+0x25d/0x760 net/core/dev_addr_lists.c:118
  __dev_mc_add net/core/dev_addr_lists.c:868 [inline]
  dev_mc_add+0xa1/0x120 net/core/dev_addr_lists.c:886
  bond_enslave+0x2b8b/0x3ac0 drivers/net/bonding/bond_main.c:2180
  do_set_master+0x533/0x6d0 net/core/rtnetlink.c:2963
  do_setlink+0xcf0/0x41c0 net/core/rtnetlink.c:3165
  rtnl_changelink net/core/rtnetlink.c:3776 [inline]
  __rtnl_newlink net/core/rtnetlink.c:3935 [inline]
  rtnl_newlink+0x161c/0x1c90 net/core/rtnetlink.c:4072
  rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958
  netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550
  netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
  netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344
  netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894
  sock_sendmsg_nosec net/socket.c:727 [inline]
  __sock_sendmsg+0x21c/0x270 net/socket.c:742
  ____sys_sendmsg+0x505/0x820 net/socket.c:2592
  ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2646
  __sys_sendmsg+0x164/0x220 net/socket.c:2678
  do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
  __do_fast_syscall_32+0x1dc/0x560 arch/x86/entry/syscall_32.c:307
  do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
 </TASK>

The buggy address belongs to the variable:
 lacpdu_mcast_addr+0x0/0x40

Fixes: 872254dd6b ("net/bonding: Enable bonding to enslave non ARPHRD_ETHER")
Reported-by: syzbot+9c081b17773615f24672@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/netdev/6966946b.a70a0220.245e30.0002.GAE@google.com/T/#u
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Andrew Lunn <andrew+netdev@lunn.ch>
Acked-by: Jay Vosburgh <jv@jvosburgh.net>
Link: https://patch.msgid.link/20260113191201.3970737-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-01-30 10:28:38 +01:00
arch arm64: dts: qcom: sc8280xp: Add missing VDD_MXC links 2026-01-30 10:28:37 +01:00
block block: fix NULL pointer dereference in blk_zone_reset_all_bio_endio() 2026-01-08 10:15:06 +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 10:14:32 +01:00
Documentation dt-bindings: power: qcom,rpmpd: document the SM8750 RPMh Power Domains 2026-01-30 10:28:37 +01:00
drivers
fs btrfs: fix missing fields in superblock backup with BLOCK_GROUP_TREE 2026-01-30 10:28:37 +01:00
include dt-bindings: power: qcom,rpmpd: Add SC8280XP_MXC_AO 2026-01-30 10:28:37 +01:00
init init: handle bootloader identifier in kernel parameters 2025-10-19 16:33:50 +02:00
io_uring io_uring: move local task_work in exit cancel loop 2026-01-23 11:18:42 +01:00
ipc ipc: fix to protect IPCS lookups using RCU 2025-06-27 11:11:22 +01:00
kernel ptp: Add PHC file mode checks. Allow RO adjtime() without FMODE_WRITE. 2026-01-30 10:28:37 +01:00
lib lib/buildid: use __kernel_read() for sleepable context 2026-01-23 11:18:43 +01:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm mm/page_alloc: prevent pcp corruption with SMP=n 2026-01-23 11:18:52 +01:00
net vsock/virtio: Coalesce only linear skb 2026-01-30 10:28:38 +01:00
rust rust: kbuild: workaround rustdoc doctests modifier bug 2025-11-24 10:36:07 +01:00
samples samples/ftrace: Adjust LoongArch register restore order in direct calls 2026-01-08 10:14:50 +01:00
scripts kbuild: fix compilation of dtb specified on command-line without make rule 2026-01-08 10:14:34 +01:00
security tpm2-sessions: Fix out of range indexing in name_size 2026-01-17 16:31:29 +01:00
sound ASoC: codecs: wsa881x: fix unnecessary initialisation 2026-01-23 11:18:45 +01:00
tools testptp: Add option to open PHC in readonly mode 2026-01-30 10:28:37 +01:00
usr kbuild: uapi: Strip comments before size type check 2025-11-13 15:34:35 -05:00
virt KVM: Disallow toggling KVM_MEM_GUEST_MEMFD on an existing memslot 2026-01-08 10:14:21 +01:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.clippy.toml rust: give Clippy the minimum supported Rust version 2025-08-01 09:48:44 +01:00
.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 Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore rust: introduce .clippy.toml 2025-03-13 13:01:42 +01:00
.mailmap mailmap: add entry for Thorsten Blum 2024-11-07 14:14:59 -08:00
.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: Remove self from DSA entry 2024-11-03 12:52:38 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS staging: rtl8712: Remove driver using deprecated API wext 2025-12-07 06:25:02 +09:00
Makefile Linux 6.12.67 2026-01-23 11:18:52 +01:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

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.