uaccess: remove CONFIG_SET_FS

There are no remaining callers of set_fs(), so CONFIG_SET_FS
can be removed globally, along with the thread_info field and
any references to it.

This turns access_ok()

uaccess: remove CONFIG_SET_FS

There are no remaining callers of set_fs(), so CONFIG_SET_FS
can be removed globally, along with the thread_info field and
any references to it.

This turns access_ok() into a cheaper check against TASK_SIZE_MAX.

As CONFIG_SET_FS is now gone, drop all remaining references to
set_fs()/get_fs(), mm_segment_t, user_addr_max() and uaccess_kernel().

Acked-by: Sam Ravnborg <[email protected]> # for sparc32 changes
Acked-by: "Eric W. Biederman" <[email protected]>
Tested-by: Sergey Matyukevich <[email protected]> # for arc changes
Acked-by: Stafford Horne <[email protected]> # [openrisc, asm-generic]
Acked-by: Dinh Nguyen <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

show more ...

microblaze: add support for TIF_NOTIFY_SIGNAL

Wire up TIF_NOTIFY_SIGNAL handling for microblaze.

Cc: Michal Simek <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Link: https://lore.k

microblaze: add support for TIF_NOTIFY_SIGNAL

Wire up TIF_NOTIFY_SIGNAL handling for microblaze.

Cc: Michal Simek <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Michal Simek <[email protected]>

show more ...

microblaze: add support for TIF_NOTIFY_SIGNAL

Wire up TIF_NOTIFY_SIGNAL handling for microblaze.

Acked-by: Michal Simek <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>

microblaze: Convert headers to SPDX license

Covert all headers to SPDX.

Signed-off-by: Michal Simek <[email protected]>
Reviewed-by: Stefan Asserhall <[email protected]>
Reviewed-by

microblaze: Convert headers to SPDX license

Covert all headers to SPDX.

Signed-off-by: Michal Simek <[email protected]>
Reviewed-by: Stefan Asserhall <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>

show more ...

Construct init thread stack in the linker script rather than by union

Construct the init thread stack in the linker script rather than doing it
by means of a union so that ia64's init_task.c can be

Construct init thread stack in the linker script rather than by union

Construct the init thread stack in the linker script rather than doing it
by means of a union so that ia64's init_task.c can be got rid of.

The following symbols are then made available from INIT_TASK_DATA() linker
script macro:

init_thread_union
init_stack

INIT_TASK_DATA() also expands the region to THREAD_SIZE to accommodate the
size of the init stack. init_thread_union is given its own section so that
it can be placed into the stack space in the right order. I'm assuming
that the ia64 ordering is correct and that the task_struct is first and the
thread_info second.

Signed-off-by: David Howells <[email protected]>
Tested-by: Tony Luck <[email protected]>
Tested-by: Will Deacon <[email protected]> (arm64)
Tested-by: Palmer Dabbelt <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>

show more ...

signal: consolidate {TS,TLF}_RESTORE_SIGMASK code

In general, there's no need for the "restore sigmask" flag to live in
ti->flags. alpha, ia64, microblaze, powerpc, sh, sparc (64-bit only),
tile, a

signal: consolidate {TS,TLF}_RESTORE_SIGMASK code

In general, there's no need for the "restore sigmask" flag to live in
ti->flags. alpha, ia64, microblaze, powerpc, sh, sparc (64-bit only),
tile, and x86 use essentially identical alternative implementations,
placing the flag in ti->status.

Replace those optimized implementations with an equally good common
implementation that stores it in a bitfield in struct task_struct and
drop the custom implementations.

Additional architectures can opt in by removing their
TIF_RESTORE_SIGMASK defines.

Link: http://lkml.kernel.org/r/8a14321d64a28e40adfddc90e18a96c086a6d6f9.1468522723.git.luto@kernel.org
Signed-off-by: Andy Lutomirski <[email protected]>
Tested-by: Michael Ellerman <[email protected]> [powerpc]
Cc: Richard Henderson <[email protected]>
Cc: Ivan Kokshaysky <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Cc: Rich Felker <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Dmitry Safonov <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

microblaze: Remove signal translation and exec_domain

As execution domain support is gone we can remove
signal translation from the signal code and remove
exec_domain from thread_info.

Signed-off-b

microblaze: Remove signal translation and exec_domain

As execution domain support is gone we can remove
signal translation from the signal code and remove
exec_domain from thread_info.

Signed-off-by: Richard Weinberger <[email protected]>

show more ...

all arches, signal: move restart_block to struct task_struct

If an attacker can cause a controlled kernel stack overflow, overwriting
the restart block is a very juicy exploit target. This is becau

all arches, signal: move restart_block to struct task_struct

If an attacker can cause a controlled kernel stack overflow, overwriting
the restart block is a very juicy exploit target. This is because the
restart_block is held in the same memory allocation as the kernel stack.

Moving the restart block to struct task_struct prevents this exploit by
making the restart_block harder to locate.

Note that there are other fields in thread_info that are also easy
targets, at least on some architectures.

It's also a decent simplification, since the restart code is more or less
identical on all architectures.

[[email protected]: metag: align thread_info::supervisor_stack]
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Al Viro <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: David Miller <[email protected]>
Acked-by: Richard Weinberger <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Ivan Kokshaysky <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Russell King <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Haavard Skinnemoen <[email protected]>
Cc: Hans-Christian Egtvedt <[email protected]>
Cc: Steven Miao <[email protected]>
Cc: Mark Salter <[email protected]>
Cc: Aurelien Jacquiot <[email protected]>
Cc: Mikael Starvik <[email protected]>
Cc: Jesper Nilsson <[email protected]>
Cc: David Howells <[email protected]>
Cc: Richard Kuo <[email protected]>
Cc: "Luck, Tony" <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Jonas Bonn <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Acked-by: Michael Ellerman <[email protected]> (powerpc)
Tested-by: Michael Ellerman <[email protected]> (powerpc)
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Chen Liqin <[email protected]>
Cc: Lennox Wu <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Guan Xuetao <[email protected]>
Cc: Chris Zankel <[email protected]>
Cc: Max Filippov <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Guenter Roeck <[email protected]>
Signed-off-by: James Hogan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

preempt: Make PREEMPT_ACTIVE generic

No point in having this bit defined by architecture.

Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Link: h

preempt: Make PREEMPT_ACTIVE generic

No point in having this bit defined by architecture.

Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]

show more ...

arch: Consolidate tsk_is_polling()

Move it to a common place. Preparatory patch for implementing
set/clear for the idle need_resched poll implementation.

Signed-off-by: Thomas Gleixner <tglx@linutr

arch: Consolidate tsk_is_polling()

Move it to a common place. Preparatory patch for implementing
set/clear for the idle need_resched poll implementation.

Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Rusty Russell <[email protected]>
Cc: Paul McKenney <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Reviewed-by: Cc: Srivatsa S. Bhat <[email protected]>
Cc: Magnus Damm <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>

show more ...

bury the rest of TIF_IRET

Some architectures had blindly copied it for no reason whatsoever.

Signed-off-by: Al Viro <[email protected]>

sanitize tsk_is_polling()

Make default just return 0. The current default (checking
TIF_POLLING_NRFLAG) is taken to architectures that need it;
ones that don't do polling in their idle threads don'

sanitize tsk_is_polling()

Make default just return 0. The current default (checking
TIF_POLLING_NRFLAG) is taken to architectures that need it;
ones that don't do polling in their idle threads don't need
to defined TIF_POLLING_NRFLAG at all.

ia64 defined both TS_POLLING (used by its tsk_is_polling())
and TIF_POLLING_NRFLAG (not used at all). Killed the latter...

Signed-off-by: Al Viro <[email protected]>

show more ...

set_restore_sigmask() is never called without SIGPENDING (and never should be)

Signed-off-by: Al Viro <[email protected]>

new helpers: {clear,test,test_and_clear}_restore_sigmask()

helpers parallel to set_restore_sigmask(), used in the next commits

Signed-off-by: Al Viro <[email protected]>

freezer: remove now unused TIF_FREEZE

Signed-off-by: Tejun Heo <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: [email protected]

microblaze: remove unused TIF_KERNEL_TRACE

TIF_KERNEL_TRACE is not used anywhere.

Signed-off-by: Michal Simek <[email protected]>

microblaze: trivial: thread_info cleanup

Coding style cleanup.

Signed-off-by: Michal Simek <[email protected]>

add descriptive comment for TIF_MEMDIE task flag declaration.

Signed-off-by: Andreas Dilger <[email protected]>
Acked-by: KOSAKI Motohiro <[email protected]>
Signed-off-by: Jiri Kosina

add descriptive comment for TIF_MEMDIE task flag declaration.

Signed-off-by: Andreas Dilger <[email protected]>
Acked-by: KOSAKI Motohiro <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>

show more ...

microblaze: Remove segment.h

I would like to use asm-generic uaccess.h where are segment
macros defined. This is just first step.

Signed-off-by: Michal Simek <[email protected]>

sched: INIT_PREEMPT_COUNT

Pull the initial preempt_count value into a single
definition site.

Maintainers for: alpha, ia64 and m68k, please have a look,
your arch code is funny.

The header magic i

sched: INIT_PREEMPT_COUNT

Pull the initial preempt_count value into a single
definition site.

Maintainers for: alpha, ia64 and m68k, please have a look,
your arch code is funny.

The header magic is a bit odd, but similar to the KERNEL_DS
one, CPP waits with expanding these macros until the
INIT_THREAD_INFO macro itself is expanded, which is in
arch/*/kernel/init_task.c where we've already included
sched.h so we're good.

Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Peter Zijlstra <[email protected]>
Acked-by: Matt Mackall <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

microblaze: Add audit and seccomp thread flags.

Signed-off-by: Edgar E. Iglesias <[email protected]>

microblaze: prepare signal handling for generic unistd.h

We need to define set_restore_sigmask() in order to
get pselect and ppoll. Also, the setup_frame function
can not be used when __NR_sigreturn

microblaze: prepare signal handling for generic unistd.h

We need to define set_restore_sigmask() in order to
get pselect and ppoll. Also, the setup_frame function
can not be used when __NR_sigreturn is not defined.

Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Michal Simek <[email protected]>

show more ...

microblaze_v8: string.h thread_info.h

Reviewed-by: Ingo Molnar <[email protected]>
Acked-by: John Linn <[email protected]>
Acked-by: Stephen Neuendorffer <[email protected]>
Acked-by: J

microblaze_v8: string.h thread_info.h

Reviewed-by: Ingo Molnar <[email protected]>
Acked-by: John Linn <[email protected]>
Acked-by: Stephen Neuendorffer <[email protected]>
Acked-by: John Williams <[email protected]>
Signed-off-by: Michal Simek <[email protected]>

show more ...