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Fedor Pchelkin 67f70841a1 net: macb: fix clk handling on PCI glue driver removal [ Upstream commit `ce8fe5287b` ] platform_device_unregister() may still want to use the registered clks during runtime resume callback. Note that there is a commit `d82d5303c4` ("net: macb: fix use after free on rmmod") that addressed the similar problem of clk vs platform device unregistration but just moved the bug to another place. Save the pointers to clks into local variables for reuse after platform device is unregistered. BUG: KASAN: use-after-free in clk_prepare+0x5a/0x60 Read of size 8 at addr ffff888104f85e00 by task modprobe/597 CPU: 2 PID: 597 Comm: modprobe Not tainted 6.1.164+ #114 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x8d/0xba print_report+0x17f/0x496 kasan_report+0xd9/0x180 clk_prepare+0x5a/0x60 macb_runtime_resume+0x13d/0x410 [macb] pm_generic_runtime_resume+0x97/0xd0 __rpm_callback+0xc8/0x4d0 rpm_callback+0xf6/0x230 rpm_resume+0xeeb/0x1a70 __pm_runtime_resume+0xb4/0x170 bus_remove_device+0x2e3/0x4b0 device_del+0x5b3/0xdc0 platform_device_del+0x4e/0x280 platform_device_unregister+0x11/0x50 pci_device_remove+0xae/0x210 device_remove+0xcb/0x180 device_release_driver_internal+0x529/0x770 driver_detach+0xd4/0x1a0 bus_remove_driver+0x135/0x260 driver_unregister+0x72/0xb0 pci_unregister_driver+0x26/0x220 __do_sys_delete_module+0x32e/0x550 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 </TASK> Allocated by task 519: kasan_save_stack+0x2c/0x50 kasan_set_track+0x21/0x30 __kasan_kmalloc+0x8e/0x90 __clk_register+0x458/0x2890 clk_hw_register+0x1a/0x60 __clk_hw_register_fixed_rate+0x255/0x410 clk_register_fixed_rate+0x3c/0xa0 macb_probe+0x1d8/0x42e [macb_pci] local_pci_probe+0xd7/0x190 pci_device_probe+0x252/0x600 really_probe+0x255/0x7f0 __driver_probe_device+0x1ee/0x330 driver_probe_device+0x4c/0x1f0 __driver_attach+0x1df/0x4e0 bus_for_each_dev+0x15d/0x1f0 bus_add_driver+0x486/0x5e0 driver_register+0x23a/0x3d0 do_one_initcall+0xfd/0x4d0 do_init_module+0x18b/0x5a0 load_module+0x5663/0x7950 __do_sys_finit_module+0x101/0x180 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Freed by task 597: kasan_save_stack+0x2c/0x50 kasan_set_track+0x21/0x30 kasan_save_free_info+0x2a/0x50 __kasan_slab_free+0x106/0x180 __kmem_cache_free+0xbc/0x320 clk_unregister+0x6de/0x8d0 macb_remove+0x73/0xc0 [macb_pci] pci_device_remove+0xae/0x210 device_remove+0xcb/0x180 device_release_driver_internal+0x529/0x770 driver_detach+0xd4/0x1a0 bus_remove_driver+0x135/0x260 driver_unregister+0x72/0xb0 pci_unregister_driver+0x26/0x220 __do_sys_delete_module+0x32e/0x550 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Fixes: `d82d5303c4` ("net: macb: fix use after free on rmmod") Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru> Link: https://patch.msgid.link/20260330184542.626619-1-pchelkin@ispras.ru Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2026-04-18 10:33:30 +02:00
arch	s390/barrier: Make array_index_mask_nospec() __always_inline	2026-04-18 10:33:27 +02:00
block	blk-mq-debugfs: add missing debugfs_mutex in blk_mq_debugfs_register_hctxs()	2026-03-04 07:19:59 -05:00
certs	certs/blacklist_hashes.c: fix const confusion in certs blacklist	2022-06-22 14:22:01 +02:00
crypto	crypto: af-alg - fix NULL pointer dereference in scatterwalk	2026-04-18 10:33:29 +02:00
Documentation	dt-bindings: auxdisplay: ht16k33: Use unevaluatedProperties to fix common property warning	2026-04-18 10:33:29 +02:00
drivers	net: macb: fix clk handling on PCI glue driver removal	2026-04-18 10:33:30 +02:00
fs	btrfs: reject root items with drop_progress and zero drop_level	2026-04-18 10:33:29 +02:00
include	netfilter: ipset: use nla_strcmp for IPSET_ATTR_NAME attr	2026-04-18 10:33:30 +02:00
init	init: handle bootloader identifier in kernel parameters	2025-10-19 16:21:45 +02:00
io_uring	io_uring/io-wq: check IO_WQ_BIT_EXIT inside work run loop	2026-04-18 10:33:17 +02:00
ipc	ipc: fix to protect IPCS lookups using RCU	2025-06-27 11:05:26 +01:00
kernel	bpf: Fix regsafe() for pointers to packet	2026-04-18 10:33:30 +02:00
lib	netlink: allow be16 and be32 types in all uint policy checks	2026-04-18 10:33:25 +02:00
LICENSES	LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"	2021-07-15 06:31:24 -06:00
mm	mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather	2026-04-18 10:33:18 +02:00
net	rds: ib: reject FRMR registration before IB connection is established	2026-04-18 10:33:30 +02:00
samples	samples: mei: Fix building on musl libc	2025-08-28 16:24:07 +02:00
scripts	modpost: Amend ppc64 save/restfpr symnames for -Os build	2026-03-04 07:20:06 -05:00
security	xen/privcmd: add boot control for restricted usage in domU	2026-04-18 10:33:22 +02:00
sound	ASoC: adau1372: Fix clock leak on PLL lock failure	2026-04-18 10:33:27 +02:00
tools	objtool: Fix Clang jump table detection	2026-04-18 10:33:29 +02:00
usr	kbuild: hdrcheck: fix cross build with clang	2025-06-27 11:05:22 +01:00
virt	KVM: Don't clobber irqfd routing type when deassigning irqfd	2026-02-11 13:35:27 +01:00
.clang-format	clang-format: Update with the latest for_each macro list	2021-05-12 23:32:39 +02:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	Remove *.orig pattern from .gitignore	2024-10-17 15:11:10 +02:00
.mailmap	mailmap: add Andrej Shadura	2021-10-18 20:22:03 -10:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Move Daniel Drake to credits	2021-09-21 08:34:58 +03:00
Kbuild	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
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 06:09:36 +09:00
Makefile	Linux 5.15.202	2026-03-04 07:37:37 -05:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -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 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.