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Ashish Kalra 9edf20e5a1 ACPI: APEI: Fix integer overflow in ghes_estatus_pool_init() [ Upstream commit `43d2748394` ] Change num_ghes from int to unsigned int, preventing an overflow and causing subsequent vmalloc() to fail. The overflow happens in ghes_estatus_pool_init() when calculating len during execution of the statement below as both multiplication operands here are signed int: len += (num_ghes * GHES_ESOURCE_PREALLOC_MAX_SIZE); The following call trace is observed because of this bug: [ 9.317108] swapper/0: vmalloc error: size 18446744071562596352, exceeds total pages, mode:0xcc0(GFP_KERNEL), nodemask=(null),cpuset=/,mems_allowed=0-1 [ 9.317131] Call Trace: [ 9.317134] <TASK> [ 9.317137] dump_stack_lvl+0x49/0x5f [ 9.317145] dump_stack+0x10/0x12 [ 9.317146] warn_alloc.cold+0x7b/0xdf [ 9.317150] ? __device_attach+0x16a/0x1b0 [ 9.317155] __vmalloc_node_range+0x702/0x740 [ 9.317160] ? device_add+0x17f/0x920 [ 9.317164] ? dev_set_name+0x53/0x70 [ 9.317166] ? platform_device_add+0xf9/0x240 [ 9.317168] __vmalloc_node+0x49/0x50 [ 9.317170] ? ghes_estatus_pool_init+0x43/0xa0 [ 9.317176] vmalloc+0x21/0x30 [ 9.317177] ghes_estatus_pool_init+0x43/0xa0 [ 9.317179] acpi_hest_init+0x129/0x19c [ 9.317185] acpi_init+0x434/0x4a4 [ 9.317188] ? acpi_sleep_proc_init+0x2a/0x2a [ 9.317190] do_one_initcall+0x48/0x200 [ 9.317195] kernel_init_freeable+0x221/0x284 [ 9.317200] ? rest_init+0xe0/0xe0 [ 9.317204] kernel_init+0x1a/0x130 [ 9.317205] ret_from_fork+0x22/0x30 [ 9.317208] </TASK> Signed-off-by: Ashish Kalra <ashish.kalra@amd.com> [ rjw: Subject and changelog edits ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-11-10 18:14:22 +01:00
arch	s390/boot: add secure boot trailer	2022-11-10 18:14:21 +01:00
block	blk-wbt: fix that 'rwb->wc' is always set to 1 in wbt_init()	2022-10-30 09:41:19 +01:00
certs	certs/blacklist_hashes.c: fix const confusion in certs blacklist	2022-06-22 14:13:17 +02:00
crypto	crypto: akcipher - default implementation for setting a private key	2022-10-26 13:25:42 +02:00
Documentation	arm64: errata: Remove AES hwcap for COMPAT tasks	2022-10-30 09:41:16 +01:00
drivers	ACPI: APEI: Fix integer overflow in ghes_estatus_pool_init()	2022-11-10 18:14:22 +01:00
fs	btrfs: fix ulist leaks in error paths of qgroup self tests	2022-11-10 18:14:19 +01:00
include	ACPI: APEI: Fix integer overflow in ghes_estatus_pool_init()	2022-11-10 18:14:22 +01:00
init	Kconfig: Add option for asm goto w/ tied outputs to workaround clang-13 bug	2022-06-09 10:21:25 +02:00
ipc	ipc/mqueue: use get_tree_nodev() in mqueue_get_tree()	2022-06-09 10:21:17 +02:00
kernel	PM: hibernate: Allow hybrid sleep to work with s2idle	2022-11-03 23:57:52 +09:00
lib	dyndbg: drop EXPORTed dynamic_debug_exec_queries	2022-10-26 13:25:34 +02:00
LICENSES	LICENSES/deprecated: add Zlib license text	2020-09-16 14:33:49 +02:00
mm	mm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages	2022-11-03 23:57:50 +09:00
net	ipv6: fix WARNING in ip6_route_net_exit_late()	2022-11-10 18:14:20 +01:00
samples	x86: Prepare inline-asm for straight-line-speculation	2022-07-25 11:26:29 +02:00
scripts	kbuild: Add skip_encoding_btf_enum64 option to pahole	2022-10-28 12:57:12 +02:00
security	selinux: enable use of both GFP_KERNEL and GFP_ATOMIC in convert_context()	2022-10-30 09:41:15 +01:00
sound	ALSA: aoa: Fix I2S device accounting	2022-11-03 23:57:53 +09:00
tools	perf auxtrace: Fix address filter symbol name match for modules	2022-11-03 23:57:50 +09:00
usr	usr/include/Makefile: add linux/nfc.h to the compile-test coverage	2022-02-01 17:25:48 +01:00
virt	kvm: Add support for arch compat vm ioctls	2022-10-30 09:41:15 +01:00
.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	MAINTAINERS: add Amir as xfs maintainer for 5.10.y	2022-07-02 16:39:22 +02:00
Makefile	Linux 5.10.153	2022-11-03 23:57:54 +09:00
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.