linux

mirror of https://github.com/torvalds/linux.git synced 2026-06-07 14:04:54 +02:00

Linux kernel source tree

Go to file

Yang Yingliang e1959450b7 driver core: Fix possible memory leak in device_link_add() [ Upstream commit `df0a181494` ] I got memory leak as follows: unreferenced object 0xffff88801f0b2200 (size 64): comm "i2c-lis2hh12-21", pid 5455, jiffies 4294944606 (age 15.224s) hex dump (first 32 bytes): 72 65 67 75 6c 61 74 6f 72 3a 72 65 67 75 6c 61 regulator:regula 74 6f 72 2e 30 2d 2d 69 32 63 3a 31 2d 30 30 31 tor.0--i2c:1-001 backtrace: [<00000000bf5b0c3b>] __kmalloc_track_caller+0x19f/0x3a0 [<0000000050da42d9>] kvasprintf+0xb5/0x150 [<000000004bbbed13>] kvasprintf_const+0x60/0x190 [<00000000cdac7480>] kobject_set_name_vargs+0x56/0x150 [<00000000bf83f8e8>] dev_set_name+0xc0/0x100 [<00000000cc1cf7e3>] device_link_add+0x6b4/0x17c0 [<000000009db9faed>] _regulator_get+0x297/0x680 [<00000000845e7f2b>] _devm_regulator_get+0x5b/0xe0 [<000000003958ee25>] st_sensors_power_enable+0x71/0x1b0 [st_sensors] [<000000005f450f52>] st_accel_i2c_probe+0xd9/0x150 [st_accel_i2c] [<00000000b5f2ab33>] i2c_device_probe+0x4d8/0xbe0 [<0000000070fb977b>] really_probe+0x299/0xc30 [<0000000088e226ce>] __driver_probe_device+0x357/0x500 [<00000000c21dda32>] driver_probe_device+0x4e/0x140 [<000000004e650441>] __device_attach_driver+0x257/0x340 [<00000000cf1891b8>] bus_for_each_drv+0x166/0x1e0 When device_register() returns an error, the name allocated in dev_set_name() will be leaked, the put_device() should be used instead of kfree() to give up the device reference, then the name will be freed in kobject_cleanup() and the references of consumer and supplier will be decreased in device_link_release_fn(). Fixes: `287905e68d` ("driver core: Expose device link details in sysfs") Reported-by: Hulk Robot <hulkci@huawei.com> Reviewed-by: Saravana Kannan <saravanak@google.com> Reviewed-by: Rafael J. Wysocki <rafael@kernel.org> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20210930085714.2057460-1-yangyingliang@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-11-18 14:04:16 +01:00
arch	arm64: dts: qcom: pm8916: Remove wrong reg-names for rtc@6000	2021-11-18 14:04:15 +01:00
block	block: remove inaccurate requeue check	2021-11-18 14:03:58 +01:00
certs	certs: Trigger creation of RSA module signing key if it's not an RSA key	2021-09-15 09:50:29 +02:00
crypto	crypto: pcrypt - Delay write to padata->info	2021-11-18 14:04:12 +01:00
Documentation	fscrypt: allow 256-bit master keys with AES-256-XTS	2021-11-18 14:03:54 +01:00
drivers	driver core: Fix possible memory leak in device_link_add()	2021-11-18 14:04:16 +01:00
fs	JFS: fix memleak in jfs_mount	2021-11-18 14:04:15 +01:00
include	tpm: fix Atmel TPM crash caused by too frequent queries	2021-11-18 14:04:11 +01:00
init	sched/core: Initialize the idle task with preemption disabled	2021-07-14 16:55:50 +02:00
ipc	ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry	2021-05-26 12:06:54 +02:00
kernel	bpf: Fix propagation of signed bounds from 64-bit min/max into 32-bit.	2021-11-18 14:04:13 +01:00
lib	lib/xz: Validate the value before assigning it to an enum variable	2021-11-18 14:03:58 +01:00
LICENSES	LICENSES/deprecated: add Zlib license text	2020-09-16 14:33:49 +02:00
mm	mm: khugepaged: skip huge page collapse for special files	2021-11-06 14:10:09 +01:00
net	udp6: allow SO_MARK ctrl msg to affect routing	2021-11-18 14:04:13 +01:00
samples	samples/kretprobes: Fix return value if register_kretprobe() failed	2021-11-18 14:04:11 +01:00
scripts	leaking_addresses: Always print a trailing newline	2021-11-18 14:03:57 +01:00
security	smackfs: use netlbl_cfg_cipsov4_del() for deleting cipso_v4_doi	2021-11-18 14:04:10 +01:00
sound	ALSA: hda: Use position buffer for SKL+ again	2021-11-18 14:04:16 +01:00
tools	bpf: Fix propagation of bounds from 64-bit min/max into 32-bit and var_off.	2021-11-18 14:04:13 +01:00
usr	Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-08-07 13:29:39 -07:00
virt	KVM: do not shrink halt_poll_ns below grow_start	2021-10-09 14:40:58 +02:00
.clang-format	RDMA 5.10 pull request	2020-10-17 11:18:18 -07:00
.cocciconfig
.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	kbuild: generate Module.symvers only when vmlinux exists	2021-05-19 10:12:59 +02:00
.mailmap	mailmap: add two more addresses of Uwe Kleine-König	2020-12-06 10:19:07 -08:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Move Jason Cooper to CREDITS	2020-11-30 10:20:34 +01:00
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	f2fs: move ioctl interface definitions to separated file	2021-05-19 10:13:00 +02:00
Makefile	Linux 5.10.79	2021-11-12 14:58:35 +01:00
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.