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Filename Latest commit message Latest commit date
Baptiste Lepers 172749c879 events: Reuse value read using READ_ONCE instead of re-reading it
commit b89a05b21f46150ac10a962aa50109250b56b03b 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
certs
crypto
Documentation
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
init
ipc
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
scripts
security
sound
tools perf machine: Initialize srcline string member in add_location struct 2021-09-22 12:26:41 +02:00
usr
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.cocciconfig
.get_maintainer.ignore
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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.