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Serge Semin e225ca58f6 ata: libahci_platform: Sanity check the DT child nodes number 
[ Upstream commit 3c132ea650 ]

Having greater than AHCI_MAX_PORTS (32) ports detected isn't that critical
from the further AHCI-platform initialization point of view since
exceeding the ports upper limit will cause allocating more resources than
will be used afterwards. But detecting too many child DT-nodes doesn't
seem right since it's very unlikely to have it on an ordinary platform. In
accordance with the AHCI specification there can't be more than 32 ports
implemented at least due to having the CAP.NP field of 5 bits wide and the
PI register of dword size. Thus if such situation is found the DTB must
have been corrupted and the data read from it shouldn't be reliable. Let's
consider that as an erroneous situation and halt further resources
allocation.

Note it's logically more correct to have the nports set only after the
initialization value is checked for being sane. So while at it let's make
sure nports is assigned with a correct value.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-10-24 09:58:25 +02:00
arch ARM: 9242/1: kasan: Only map modules if CONFIG_KASAN_VMALLOC=n 2022-10-24 09:58:23 +02:00
block blk-throttle: prevent overflow while calculating wait time 2022-10-24 09:58:25 +02:00
certs certs: make system keyring depend on built-in x509 parser 2022-09-28 11:32:27 +02:00
crypto crypto: akcipher - default implementation for setting a private key 2022-10-24 09:58:05 +02:00
Documentation x86/apic: Don't disable x2APIC if locked 2022-10-24 09:58:12 +02:00
drivers ata: libahci_platform: Sanity check the DT child nodes number 2022-10-24 09:58:25 +02:00
fs btrfs: call __btrfs_remove_free_space_cache_locked on cache load failure 2022-10-24 09:58:22 +02:00
include bpf: use bpf_prog_pack for bpf_dispatcher 2022-10-24 09:58:15 +02:00
init arm64: fix rodata=full 2022-08-31 17:18:19 +02:00
io_uring io_uring: correct pinned_vm accounting 2022-10-24 09:56:40 +02:00
ipc ipc: mqueue: fix possible memory leak in init_mqueue_fs() 2022-10-24 09:58:02 +02:00
kernel bpf: use bpf_prog_pack for bpf_dispatcher 2022-10-24 09:58:15 +02:00
lib dyndbg: drop EXPORTed dynamic_debug_exec_queries 2022-10-24 09:57:52 +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 mm/mmap: undo ->mmap() when arch_validate_flags() fails 2022-10-24 09:56:48 +02:00
net Bluetooth: L2CAP: Fix user-after-free 2022-10-24 09:58:16 +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: rpm-pkg: fix breakage when V=1 is used 2022-10-24 09:58:07 +02:00
security ima: fix blocking of security.ima xattrs of unsupported algorithms 2022-10-24 09:57:01 +02:00
sound ASoC: SOF: add quirk to override topology mclk_id 2022-10-24 09:58:19 +02:00
tools kselftest/arm64: Fix validatation termination record after EXTRA_CONTEXT 2022-10-24 09:58:22 +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
.get_maintainer.ignore
.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 5.19.16 2022-10-15 08:01:46 +02:00
README

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.