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Eric W. Biederman c317d306d5 signal/sparc32: Exit with a fatal signal when try_to_clear_window_buffer fails 
The function try_to_clear_window_buffer is only called from
rtrap_32.c.  After it is called the signal pending state is retested,
and signals are handled if TIF_SIGPENDING is set.  This allows
try_to_clear_window_buffer to call force_fatal_signal and then rely on
the signal being delivered to kill the process, without any danger of
returning to userspace, or otherwise using possible corrupt state on
failure.

The functional difference between force_fatal_sig and do_exit is that
do_exit will only terminate a single thread, and will never trigger a
core-dump.  A multi-threaded program for which a single thread
terminates unexpectedly is hard to reason about.  Calling force_fatal_sig
does not give userspace a chance to catch the signal, but otherwise
is an ordinary fatal signal exit, and it will trigger a coredump
of the offending process if core dumps are enabled.

Cc: David Miller <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Link: https://lkml.kernel.org/r/20211020174406.17889-15-ebiederm@xmission.com
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2021-10-29 14:31:33 -05:00
arch signal/sparc32: Exit with a fatal signal when try_to_clear_window_buffer fails 2021-10-29 14:31:33 -05:00
block block-5.15-2021-09-11 2021-09-11 10:19:51 -07:00
certs
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2021-08-30 12:57:10 -07:00
Documentation An assortment of improvements for auxdisplay: 2021-09-12 16:00:49 -07:00
drivers exit/kthread: Have kernel threads return instead of calling do_exit 2021-10-29 14:31:33 -05:00
fs exit/kthread: Have kernel threads return instead of calling do_exit 2021-10-29 14:31:33 -05:00
include signal: Implement force_fatal_sig 2021-10-29 14:31:33 -05:00
init More tracing updates for 5.15: 2021-09-09 13:11:15 -07:00
ipc ARM development updates for 5.15: 2021-09-09 13:25:49 -07:00
kernel exit/syscall_user_dispatch: Send ordinary signals on failure 2021-10-29 14:31:33 -05:00
lib Minor fixes to the processing of the bootconfig tree. 2021-09-11 10:16:30 -07:00
LICENSES
mm ARM development updates for 5.15: 2021-09-09 13:25:49 -07:00
net exit/kthread: Have kernel threads return instead of calling do_exit 2021-10-29 14:31:33 -05:00
samples kgdb patches for 5.15 2021-09-07 12:08:04 -07:00
scripts RISC-V Patches for the 5.15 Merge Window, Part 2 2021-09-11 14:29:42 -07:00
security Kbuild updates for v5.15 2021-09-03 15:33:47 -07:00
sound sound fixes for 5.15-rc1 2021-09-09 16:05:10 -07:00
tools perf tools changes for v5.15: 2nd batch 2021-09-12 16:18:15 -07:00
usr
virt KVM: Drop unused kvm_dirty_gfn_invalid() 2021-09-06 08:23:46 -04:00
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COPYING
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Kbuild
Kconfig
MAINTAINERS Compiler Attributes improvements: 2021-09-12 16:09:26 -07:00
Makefile Linux 5.15-rc1 2021-09-12 16:28:37 -07:00
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.