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| Filename | Latest commit message | Latest commit date |
|---|---|---|
44d96d2dc0
[ Upstream commit 99e729bd40fb3272fa4b0140839d5e957b58588a ]
Noticed failure as a crash on ia64 when tried to symbolize all backtraces
collected by page_owner=on:
$ cat /sys/kernel/debug/page_owner
<oops>
CPU: 1 PID: 2074 Comm: cat Not tainted 5.12.0-rc4 #226
Hardware name: hp server rx3600, BIOS 04.03 04/08/2008
ip is at dereference_module_function_descriptor+0x41/0x100
Crash happens at dereference_module_function_descriptor() due to
use-after-free when dereferencing ".opd" section header.
All section headers are already freed after module is laoded successfully.
To keep symbolizer working the change stores ".opd" address and size after
module is relocated to a new place and before section headers are
discarded.
To make similar errors less obscure module_finalize() now zeroes out all
variables relevant to module loading only.
Link: https://lkml.kernel.org/r/20210403074803.3309096-1-slyfox@gentoo.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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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.