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Sean Wang 6557a28f3e wifi: mt76: mt7921: fix null pointer access in mt792x_mac_link_bss_remove Fix null pointer access in mt792x_mac_link_bss_remove. To prevent null pointer access, we should assign the vif to bss_conf in mt7921_add_interface. This ensures that subsequent operations on the BSS can properly reference the correct vif. [ T843] Call Trace: [ T843] <TASK> [ T843] ? __die+0x1e/0x60 [ T843] ? page_fault_oops+0x157/0x450 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? search_bpf_extables+0x5a/0x80 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? exc_page_fault+0x2bb/0x670 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? lock_timer_base+0x71/0x90 [ T843] ? asm_exc_page_fault+0x26/0x30 [ T843] ? mt792x_mac_link_bss_remove+0x24/0x110 [mt792x_lib] [ T843] ? mt792x_remove_interface+0x6e/0x90 [mt792x_lib] [ T843] ? ieee80211_do_stop+0x507/0x7e0 [mac80211] [ T843] ? ieee80211_stop+0x53/0x190 [mac80211] [ T843] ? __dev_close_many+0xa5/0x120 [ T843] ? __dev_change_flags+0x18c/0x220 [ T843] ? dev_change_flags+0x21/0x60 [ T843] ? do_setlink+0xdf9/0x11d0 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? security_sock_rcv_skb+0x33/0x50 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? __nla_validate_parse+0x61/0xd10 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? genl_done+0x53/0x80 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? netlink_dump+0x357/0x410 [ T843] ? __rtnl_newlink+0x5d6/0x980 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? genl_family_rcv_msg_dumpit+0xdf/0xf0 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? __kmalloc_cache_noprof+0x44/0x210 [ T843] ? rtnl_newlink+0x42/0x60 [ T843] ? rtnetlink_rcv_msg+0x152/0x3f0 [ T843] ? mptcp_pm_nl_dump_addr+0x180/0x180 [ T843] ? rtnl_calcit.isra.0+0x130/0x130 [ T843] ? netlink_rcv_skb+0x56/0x100 [ T843] ? netlink_unicast+0x199/0x290 [ T843] ? netlink_sendmsg+0x21d/0x490 [ T843] ? __sock_sendmsg+0x78/0x80 [ T843] ? ____sys_sendmsg+0x23f/0x2e0 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? copy_msghdr_from_user+0x68/0xa0 [ T843] ? ___sys_sendmsg+0x81/0xd0 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? crng_fast_key_erasure+0xbc/0xf0 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? get_random_bytes_user+0x126/0x140 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? __fdget+0xb1/0xe0 [ T843] ? __sys_sendmsg+0x56/0xa0 [ T843] ? srso_alias_return_thunk+0x5/0xfbef5 [ T843] ? do_syscall_64+0x5f/0x170 [ T843] ? entry_SYSCALL_64_after_hwframe+0x55/0x5d [ T843] </TASK> Fixes: `1541d63c5f` ("wifi: mt76: mt7925: add mt7925_mac_link_bss_remove to remove per-link BSS") Reported-by: Bert Karwatzki <spasswolf@web.de> Closes: https://lore.kernel.org/linux-wireless/2fee61f8c903d02a900ca3188c3742c7effd102e.camel@web.de/#b Signed-off-by: Sean Wang <sean.wang@mediatek.com> Tested-by: Bert Karwatzki <spasswolf@web.de> Link: https://patch.msgid.link/20240718234633.12737-1-sean.wang@kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>		History 2024-07-26 12:34:20 +02:00
arch	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-25 12:58:36 -07:00
block	for-6.11/block-20240722	2024-07-22 11:32:05 -07:00
certs	kbuild: use $(src) instead of $(srctree)/$(src) for source directory	2024-05-10 04:34:52 +09:00
crypto	crypto: testmgr - generate power-of-2 lengths more often	2024-07-13 11:50:28 +12:00
Documentation	A lot of networking people were at a conference last week, busy	2024-07-25 13:32:25 -07:00
drivers	wifi: mt76: mt7921: fix null pointer access in mt792x_mac_link_bss_remove	2024-07-26 12:34:20 +02:00
fs	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-25 12:58:36 -07:00
include	A lot of networking people were at a conference last week, busy	2024-07-25 13:32:25 -07:00
init	Kbuild updates for v6.11	2024-07-23 14:32:21 -07:00
io_uring	io_uring: fix error pbuf checking	2024-07-20 11:04:57 -06:00
ipc	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
kernel	A lot of networking people were at a conference last week, busy	2024-07-25 13:32:25 -07:00
lib	trivial printk changes for 6.11	2024-07-25 13:18:41 -07:00
LICENSES	LICENSES: Add the copyleft-next-0.3.1 license	2022-11-08 15:44:01 +01:00
mm	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
net	wifi: cfg80211: correct S1G beacon length calculation	2024-07-26 12:32:47 +02:00
rust	This pull request contains the following changes for UML:	2024-07-25 12:33:08 -07:00
samples	Driver core changes for 6.11-rc1	2024-07-25 10:42:22 -07:00
scripts	This pull request contains the following changes for UML:	2024-07-25 12:33:08 -07:00
security	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
sound	Driver core changes for 6.11-rc1	2024-07-25 10:42:22 -07:00
tools	A lot of networking people were at a conference last week, busy	2024-07-25 13:32:25 -07:00
usr	initramfs: shorten cmd_initfs in usr/Makefile	2024-07-16 01:07:52 +09:00
virt	KVM generic changes for 6.11	2024-07-16 09:51:36 -04:00
.clang-format	Docs: Move clang-format from process/ to dev-tools/	2024-06-26 16:36:00 -06:00
.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	kbuild: add script and target to generate pacman package	2024-07-22 01:24:22 +09:00
.mailmap	MAINTAINERS: Update email address of Naveen	2024-07-17 19:27:18 +02:00
.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	tracing: Update of MAINTAINERS and CREDITS file	2024-07-18 14:08:42 -07:00
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	A lot of networking people were at a conference last week, busy	2024-07-25 13:32:25 -07:00
Makefile	Kbuild updates for v6.11	2024-07-23 14:32:21 -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.