Skip to main content

Browse the archive

https://github.com/torvalds/linux
23 October 2021, 00:29:24 UTC
Revision d88d59b64ca35abae208e2781fdb45e69cbed56c authored by Thomas Gleixner on 19 August 2020, 19:44:39 UTC, committed by Thomas Gleixner on 21 August 2020, 14:17:29 UTC 
core/entry: Respect syscall number rewrites
 
The transcript of the x86 entry code to the generic version failed to
reload the syscall number from ptregs after ptrace and seccomp have run,
which both can modify the syscall number in ptregs. It returns the original
syscall number instead which is obviously not the right thing to do.

Reload the syscall number to fix that.

Fixes: 142781e108b1 ("entry: Provide generic syscall entry functionality")
Reported-by: Kyle Huey <me@kylehuey.com> 
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Kyle Huey <me@kylehuey.com> 
Tested-by: Kees Cook <keescook@chromium.org>
Acked-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/87blj6ifo8.fsf@nanos.tec.linutronix.de
1 parent 9123e3a
Raw File
Tip revision: d88d59b64ca35abae208e2781fdb45e69cbed56c authored by Thomas Gleixner on 19 August 2020, 19:44:39 UTC
core/entry: Respect syscall number rewrites
Tip revision: d88d59b
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.
back to top