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Armin Wolf bea3f8aa99 wifi: rt2x00: Fix memory leak when handling surveys
[ Upstream commit cbef9a83c51dfcb07f77cfa6ac26f53a1ea86f49 ]

When removing a rt2x00 device, its associated channel surveys
are not freed, causing a memory leak observable with kmemleak:

unreferenced object 0xffff9620f0881a00 (size 512):
  comm "systemd-udevd", pid 2290, jiffies 4294906974 (age 33.768s)
  hex dump (first 32 bytes):
    70 44 12 00 00 00 00 00 92 8a 00 00 00 00 00 00  pD..............
    00 00 00 00 00 00 00 00 ab 87 01 00 00 00 00 00  ................
  backtrace:
    [<ffffffffb0ed858b>] __kmalloc+0x4b/0x130
    [<ffffffffc1b0f29b>] rt2800_probe_hw+0xc2b/0x1380 [rt2800lib]
    [<ffffffffc1a9496e>] rt2800usb_probe_hw+0xe/0x60 [rt2800usb]
    [<ffffffffc1ae491a>] rt2x00lib_probe_dev+0x21a/0x7d0 [rt2x00lib]
    [<ffffffffc1b3b83e>] rt2x00usb_probe+0x1be/0x980 [rt2x00usb]
    [<ffffffffc05981e2>] usb_probe_interface+0xe2/0x310 [usbcore]
    [<ffffffffb13be2d5>] really_probe+0x1a5/0x410
    [<ffffffffb13be5c8>] __driver_probe_device+0x78/0x180
    [<ffffffffb13be6fe>] driver_probe_device+0x1e/0x90
    [<ffffffffb13be972>] __driver_attach+0xd2/0x1c0
    [<ffffffffb13bbc57>] bus_for_each_dev+0x77/0xd0
    [<ffffffffb13bd2a2>] bus_add_driver+0x112/0x210
    [<ffffffffb13bfc6c>] driver_register+0x5c/0x120
    [<ffffffffc0596ae8>] usb_register_driver+0x88/0x150 [usbcore]
    [<ffffffffb0c011c4>] do_one_initcall+0x44/0x220
    [<ffffffffb0d6134c>] do_init_module+0x4c/0x220

Fix this by freeing the channel surveys on device removal.

Tested with a RT3070 based USB wireless adapter.

Fixes: 5447626910 ("rt2x00: save survey for every channel visited")
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Acked-by: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230330215637.4332-1-W_Armin@gmx.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-05-11 23:03:20 +09:00
arch arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step 2023-05-11 23:03:16 +09:00
block blk-crypto: make blk_crypto_evict_key() more robust 2023-05-11 23:03:01 +09:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-02-09 11:28:11 +01:00
crypto crypto: api - Demote BUG_ON() in crypto_unregister_alg() to a WARN_ON() 2023-05-11 23:03:02 +09:00
Documentation ASoC: dt-bindings: qcom,lpass-rx-macro: correct minItems for clocks 2023-05-11 23:03:05 +09:00
drivers wifi: rt2x00: Fix memory leak when handling surveys 2023-05-11 23:03:20 +09:00
fs f2fs: fix scheduling while atomic in decompression path 2023-05-11 23:03:20 +09:00
include scsi: libsas: Add sas_ata_device_link_abort() 2023-05-11 23:03:20 +09:00
init gcc: disable '-Warray-bounds' for gcc-13 too 2023-04-26 14:28:43 +02:00
io_uring io_uring: fix memory leak when removing provided buffers 2023-04-13 16:55:31 +02:00
ipc ipc: fix memory leak in init_mqueue_fs() 2022-12-31 13:32:01 +01:00
kernel bpf: Fix __reg_bound_offset 64->32 var_off subreg propagation 2023-05-11 23:03:19 +09:00
lib debugobject: Prevent init race with static objects 2023-05-11 23:03:16 +09:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm mm/mempolicy: fix use-after-free of VMA iterator 2023-05-01 08:26:27 +09:00
net netfilter: keep conntrack reference until IPsecv6 policy checks are done 2023-05-11 23:03:18 +09:00
rust rust: kernel: Mark rust_fmt_argument as extern "C" 2023-04-26 14:28:38 +02:00
samples ftrace: Export ftrace_free_filter() to modules 2023-02-01 08:34:37 +01:00
scripts ASN.1: Fix check for strdup() success 2023-04-26 14:28:44 +02:00
security selinux: ensure av_permissions.h is built when needed 2023-05-11 23:03:06 +09:00
sound ASoC: amd: ps: update the acp clock source. 2023-05-11 23:02:59 +09:00
tools bpf: Fix __reg_bound_offset 64->32 var_off subreg propagation 2023-05-11 23:03:19 +09:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt KVM: Register /dev/kvm as the _very_ last thing during initialization 2023-03-10 09:34:11 +01:00
.clang-format inet: ping: use hlist_nulls rcu iterator during lookup 2022-12-01 12:42:46 +01:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
.mailmap 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -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 Michal Marek from Kbuild maintainers 2022-11-16 14:53:00 +09:00
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 audit: update the mailing list in MAINTAINERS 2023-02-25 11:25:42 +01:00
Makefile Linux 6.1.27 2023-05-01 08:26:28 +09:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -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 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.