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Lin Ma 47dd5447ca net: wwan: fix global oob in wwan_rtnl_policy The variable wwan_rtnl_link_ops assign a bigger maxtype which leads to a global out-of-bounds read when parsing the netlink attributes. Exactly same bug cause as the oob fixed in commit `b33fb5b801` ("net: qualcomm: rmnet: fix global oob in rmnet_policy"). ================================================================== BUG: KASAN: global-out-of-bounds in validate_nla lib/nlattr.c:388 [inline] BUG: KASAN: global-out-of-bounds in __nla_validate_parse+0x19d7/0x29a0 lib/nlattr.c:603 Read of size 1 at addr ffffffff8b09cb60 by task syz.1.66276/323862 CPU: 0 PID: 323862 Comm: syz.1.66276 Not tainted 6.1.70 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x177/0x231 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x14f/0x750 mm/kasan/report.c:395 kasan_report+0x139/0x170 mm/kasan/report.c:495 validate_nla lib/nlattr.c:388 [inline] __nla_validate_parse+0x19d7/0x29a0 lib/nlattr.c:603 __nla_parse+0x3c/0x50 lib/nlattr.c:700 nla_parse_nested_deprecated include/net/netlink.h:1269 [inline] __rtnl_newlink net/core/rtnetlink.c:3514 [inline] rtnl_newlink+0x7bc/0x1fd0 net/core/rtnetlink.c:3623 rtnetlink_rcv_msg+0x794/0xef0 net/core/rtnetlink.c:6122 netlink_rcv_skb+0x1de/0x420 net/netlink/af_netlink.c:2508 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline] netlink_unicast+0x74b/0x8c0 net/netlink/af_netlink.c:1352 netlink_sendmsg+0x882/0xb90 net/netlink/af_netlink.c:1874 sock_sendmsg_nosec net/socket.c:716 [inline] __sock_sendmsg net/socket.c:728 [inline] ____sys_sendmsg+0x5cc/0x8f0 net/socket.c:2499 ___sys_sendmsg+0x21c/0x290 net/socket.c:2553 __sys_sendmsg net/socket.c:2582 [inline] __do_sys_sendmsg net/socket.c:2591 [inline] __se_sys_sendmsg+0x19e/0x270 net/socket.c:2589 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x45/0x90 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f67b19a24ad RSP: 002b:00007f67b17febb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f67b1b45f80 RCX: 00007f67b19a24ad RDX: 0000000000000000 RSI: 0000000020005e40 RDI: 0000000000000004 RBP: 00007f67b1a1e01d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd2513764f R14: 00007ffd251376e0 R15: 00007f67b17fed40 </TASK> The buggy address belongs to the variable: wwan_rtnl_policy+0x20/0x40 The buggy address belongs to the physical page: page:ffffea00002c2700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb09c flags: 0xfff00000001000(reserved\|node=0\|zone=1\|lastcpupid=0x7ff) raw: 00fff00000001000 ffffea00002c2708 ffffea00002c2708 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner info is not present (never set?) Memory state around the buggy address: ffffffff8b09ca00: 05 f9 f9 f9 05 f9 f9 f9 00 01 f9 f9 00 01 f9 f9 ffffffff8b09ca80: 00 00 00 05 f9 f9 f9 f9 00 00 03 f9 f9 f9 f9 f9 >ffffffff8b09cb00: 00 00 00 00 05 f9 f9 f9 00 00 00 00 f9 f9 f9 f9 ^ ffffffff8b09cb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== According to the comment of `nla_parse_nested_deprecated`, use correct size `IFLA_WWAN_MAX` here to fix this issue. Fixes: `88b710532e` ("wwan: add interface creation support") Signed-off-by: Lin Ma <linma@zju.edu.cn> Reviewed-by: Loic Poulain <loic.poulain@linaro.org> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20241015131621.47503-1-linma@zju.edu.cn Signed-off-by: Paolo Abeni <pabeni@redhat.com>		2024-10-21 11:38:44 +02:00
arch	powerpc fixes for 6.12 #4	2024-10-12 17:16:21 -07:00
block	block-6.12-20241004	2024-10-04 10:43:44 -07:00
certs	sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3	2024-09-20 19:52:48 +03:00
crypto	This push fixes the following issues:	2024-10-16 08:42:54 -07:00
Documentation	No contributions from subtrees.	2024-10-17 09:31:18 -07:00
drivers	net: wwan: fix global oob in wwan_rtnl_policy	2024-10-21 11:38:44 +02:00
fs	for-6.12-rc3-tag	2024-10-16 09:30:20 -07:00
include	No contributions from subtrees.	2024-10-17 09:31:18 -07:00
init	cfi: encode cfi normalized integers + kasan/gcov bug in Kconfig	2024-09-26 21:27:27 +02:00
io_uring	io_uring/rw: allow pollable non-blocking attempts for !FMODE_NOWAIT	2024-10-06 20:58:53 -06:00
ipc	struct fd layout change (and conversion to accessor helpers)	2024-09-23 09:35:36 -07:00
kernel	No contributions from subtrees.	2024-10-17 09:31:18 -07:00
lib	slab fixes for 6.12-rc1	2024-10-04 12:05:39 -07:00
LICENSES	LICENSES: add 0BSD license text	2024-09-01 20:43:24 -07:00
mm	mm: zswap: delete comments for "value" member of 'struct zswap_entry'.	2024-10-09 12:47:19 -07:00
net	No contributions from subtrees.	2024-10-17 09:31:18 -07:00
rust	Driver core fix for 6.12-rc3	2024-10-13 09:10:52 -07:00
samples	[tree-wide] finally take no_llseek out	2024-09-27 08:18:43 -07:00
scripts	kbuild: deb-pkg: Remove blank first line from maint scripts	2024-10-07 02:36:38 +09:00
security	bcachefs: do not use PF_MEMALLOC_NORECLAIM	2024-10-09 12:47:18 -07:00
sound	sound fixes for 6.12-rc2	2024-10-04 11:29:46 -07:00
tools	No contributions from subtrees.	2024-10-17 09:31:18 -07:00
usr	initramfs: shorten cmd_initfs in usr/Makefile	2024-07-16 01:07:52 +09:00
virt	x86:	2024-09-28 09:20:14 -07:00
.clang-format	clang-format: Update with v6.11-rc1's `for_each` macro list	2024-08-02 13:20:31 +02:00
.cocciconfig
.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	Kbuild updates for v6.12	2024-09-24 13:02:06 -07:00
.mailmap	mailmap: update entry for Jesper Dangaard Brouer	2024-10-20 09:41:10 -05:00
.rustfmt.toml	rust: add `.rustfmt.toml`	2022-09-28 09:02:20 +02:00
COPYING
CREDITS	CREDITS: sort alphabetically by name	2024-10-09 12:47:19 -07:00
Kbuild	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00
Kconfig
MAINTAINERS	MAINTAINERS: add samples/pktgen to NETWORKING [GENERAL]	2024-10-20 09:41:10 -05:00
Makefile	Linux 6.12-rc3	2024-10-13 14:33:32 -07:00
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.