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Yee Lee 871e0612a8 Revert "mm: kmemleak: take a full lowmem check in kmemleak_*_phys()" 
This reverts commit 23c2d497de.

Commit 23c2d497de ("mm: kmemleak: take a full lowmem check in
kmemleak_*_phys()") brought false leak alarms on some archs like arm64
that does not init pfn boundary in early booting. The final solution
lands on linux-6.0: commit 0c24e06119 ("mm: kmemleak: add rbtree and
store physical address for objects allocated with PA").

Revert this commit before linux-6.0. The original issue of invalid PA
can be mitigated by additional check in devicetree.

The false alarm report is as following: Kmemleak output: (Qemu/arm64)
unreferenced object 0xffff0000c0170a00 (size 128):
  comm "swapper/0", pid 1, jiffies 4294892404 (age 126.208s)
  hex dump (first 32 bytes):
 62 61 73 65 00 00 00 00 00 00 00 00 00 00 00 00  base............
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<(____ptrval____)>] __kmalloc_track_caller+0x1b0/0x2e4
    [<(____ptrval____)>] kstrdup_const+0x8c/0xc4
    [<(____ptrval____)>] kvasprintf_const+0xbc/0xec
    [<(____ptrval____)>] kobject_set_name_vargs+0x58/0xe4
    [<(____ptrval____)>] kobject_add+0x84/0x100
    [<(____ptrval____)>] __of_attach_node_sysfs+0x78/0xec
    [<(____ptrval____)>] of_core_init+0x68/0x104
    [<(____ptrval____)>] driver_init+0x28/0x48
    [<(____ptrval____)>] do_basic_setup+0x14/0x28
    [<(____ptrval____)>] kernel_init_freeable+0x110/0x178
    [<(____ptrval____)>] kernel_init+0x20/0x1a0
    [<(____ptrval____)>] ret_from_fork+0x10/0x20

This pacth is also applicable to linux-5.17.y/linux-5.18.y/linux-5.19.y

Cc: <stable@vger.kernel.org>
Signed-off-by: Yee Lee <yee.lee@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2022-09-15 10:47:07 +02:00
arch arm64/kexec: Fix missing extra range for crashkres_low. 2022-09-08 11:24:06 +02:00
block blk-mq: fix io hung due to missing commit_rqs 2022-08-31 17:18:19 +02:00
certs certs: make system keyring depend on x509 parser 2022-07-24 12:53:55 -07:00
crypto KEYS: asymmetric: enforce SM2 signature use pkey algo 2022-08-17 15:16:17 +02:00
Documentation rtla: Fix tracer name 2022-09-05 10:31:31 +02:00
drivers soc: fsl: select FSL_GUTS driver for DPIO 2022-09-15 10:47:07 +02:00
fs cifs: fix small mempool leak in SMB2_negotiate() 2022-09-08 11:24:02 +02:00
include fs: only do a memory barrier for the first set_buffer_uptodate() 2022-09-15 10:47:07 +02:00
init arm64: fix rodata=full 2022-08-31 17:18:19 +02:00
io_uring io_uring: fix issue with io_write() not always undoing sb_start_write() 2022-08-31 17:18:17 +02:00
ipc ipc: Free mq_sysctls if ipc namespace creation failed 2022-06-22 17:47:41 -05:00
kernel bpf: Do mark_chain_precision for ARG_CONST_ALLOC_SIZE_OR_ZERO 2022-09-08 11:23:58 +02:00
lib crypto: lib - remove unneeded selection of XOR_BLOCKS 2022-09-05 10:31:26 +02:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm Revert "mm: kmemleak: take a full lowmem check in kmemleak_*_phys()" 2022-09-15 10:47:07 +02:00
net net: mac802154: Fix a condition in the receive path 2022-09-08 11:24:07 +02:00
samples sample: bpf: xdp_router_ipv4: Allow the kernel to send arp requests 2022-08-17 15:14:25 +02:00
scripts kbuild: dummy-tools: avoid tmpdir leak in dummy gcc 2022-08-29 11:07:58 +02:00
security landlock: Fix file reparenting without explicit LANDLOCK_ACCESS_FS_REFER 2022-09-08 11:24:02 +02:00
sound ALSA: seq: Fix data-race at module auto-loading 2022-09-08 11:24:07 +02:00
tools landlock: Fix file reparenting without explicit LANDLOCK_ACCESS_FS_REFER 2022-09-08 11:24:02 +02:00
usr Not a lot of material this cycle. Many singleton patches against various 2022-05-27 11:22:03 -07:00
virt KVM: Unconditionally get a ref to /dev/kvm module when creating a VM 2022-08-25 11:45:05 +02:00
.clang-format clang-format: Fix space after for_each macros 2022-05-20 19:27:16 +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 kbuild: split the second line of *.mod into *.usyms 2022-05-08 03:16:59 +09:00
.mailmap ARM: SoC fixes for 5.19, part 4 2022-07-27 09:43:07 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: mark ARM/PALM TREO SUPPORT orphan 2022-07-07 15:17:00 +02:00
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 io_uring: move to separate directory 2022-08-17 15:14:20 +02:00
Makefile Linux 5.19.8 2022-09-08 11:24:08 +02:00
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.