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Baptiste Lepers 172749c879 events: Reuse value read using READ_ONCE instead of re-reading it 
commit b89a05b21f upstream.

In perf_event_addr_filters_apply, the task associated with
the event (event->ctx->task) is read using READ_ONCE at the beginning
of the function, checked, and then re-read from event->ctx->task,
voiding all guarantees of the checks. Reuse the value that was read by
READ_ONCE to ensure the consistency of the task struct throughout the
function.

Fixes: 375637bc52 ("perf/core: Introduce address range filtering")
Signed-off-by: Baptiste Lepers <baptiste.lepers@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210906015310.12802-1-baptiste.lepers@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-09-22 12:26:41 +02:00
arch x86/mm: Fix kern_addr_valid() to cope with existing but not present entries 2021-09-22 12:26:40 +02:00
block scsi: bsg: Remove support for SCSI_IOCTL_SEND_COMMAND 2021-09-22 12:26:23 +02:00
certs certs: Trigger creation of RSA module signing key if it's not an RSA key 2021-09-15 09:47:29 +02:00
crypto crypto: shash - avoid comparing pointers to exported functions under CFI 2021-07-14 16:53:13 +02:00
Documentation docs: Fix infiniband uverbs minor number 2021-09-22 12:26:23 +02:00
drivers net/mlx5: Fix potential sleeping in atomic context 2021-09-22 12:26:41 +02:00
fs btrfs: fix upper limit for max_inline for page size 64K 2021-09-22 12:26:38 +02:00
include mm/hugetlb: initialize hugetlb_usage in mm_init 2021-09-22 12:26:37 +02:00
init kbuild: add CONFIG_LD_IS_LLD 2021-06-30 08:47:44 -04:00
ipc ipc/util.c: sysvipc_find_ipc() incorrectly updates position index 2020-05-20 08:20:16 +02:00
kernel events: Reuse value read using READ_ONCE instead of re-reading it 2021-09-22 12:26:41 +02:00
lib lib/test_stackinit: Fix static initializer test 2021-09-22 12:26:38 +02:00
LICENSES
mm mm,vmscan: fix divide by zero in get_scan_count 2021-09-22 12:26:37 +02:00
net tipc: increase timeout in tipc_sk_enqueue() 2021-09-22 12:26:41 +02:00
samples samples: bpf: Fix tracex7 error raised on the missing argument 2021-09-22 12:26:30 +02:00
scripts kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y 2021-09-22 12:26:26 +02:00
security Smack: Fix wrong semantics in smk_access_entry() 2021-09-22 12:26:27 +02:00
sound ASoC: rockchip: i2s: Fixup config for DAIFMT_DSP_A/B 2021-09-22 12:26:35 +02:00
tools perf machine: Initialize srcline string member in add_location struct 2021-09-22 12:26:41 +02:00
usr initramfs: restore default compression behavior 2020-04-08 09:08:38 +02:00
virt KVM: Do not leak memory for duplicate debugfs directories 2021-08-12 13:21:03 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap ARM: SoC fixes 2019-11-10 13:41:59 -08:00
COPYING
CREDITS MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer 2019-10-10 08:12:51 -07:00
Kbuild
Kconfig
MAINTAINERS Documentation/llvm: add documentation on building w/ Clang/LLVM 2020-08-26 10:40:46 +02:00
Makefile Linux 5.4.147 2021-09-16 12:56:14 +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.