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Filename Latest commit message Latest commit date
Josh Poimboeuf 136353c506 x86/unwind/orc: Fix error handling in __unwind_start()
commit 71c95825289f585014fe9741b051d32a7a916680 upstream.

The unwind_state 'error' field is used to inform the reliable unwinding
code that the stack trace can't be trusted.  Set this field for all
errors in __unwind_start().

Also, move the zeroing out of the unwind_state struct to before the ORC
table initialization check, to prevent the caller from reading
uninitialized data if the ORC table is corrupted.

Fixes: af085d9084 ("stacktrace/x86: add function for detecting reliable stack traces")
Fixes: d3a0910401 ("x86/unwinder/orc: Dont bail on stack overflow")
Fixes: 98d0c8ebf77e ("x86/unwind/orc: Prevent unwinding before ORC initialization")
Reported-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/d6ac7215a84ca92b895fdd2e1aa546729417e6e6.1589487277.git.jpoimboe@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-20 08:20:34 +02:00
arch x86/unwind/orc: Fix error handling in __unwind_start() 2020-05-20 08:20:34 +02:00
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crypto gcc-10: avoid shadowing standard library 'free()' in crypto 2020-05-20 08:20:29 +02:00
Documentation
drivers drm/amd/display: add basic atomic check for cursor plane 2020-05-20 08:20:33 +02:00
fs cifs: fix leaked reference on requeued write 2020-05-20 08:20:34 +02:00
include x86: Fix early boot crash on gcc-10, third try 2020-05-20 08:20:34 +02:00
init x86: Fix early boot crash on gcc-10, third try 2020-05-20 08:20:34 +02:00
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sound ALSA: usb-audio: Add control message quirk delay for Kingston HyperX headset 2020-05-20 08:20:31 +02:00
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Makefile gcc-10: disable 'restrict' warning for now 2020-05-20 08:20:29 +02:00
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.