linux-stable.git/arch, branch v4.19.1

sparc64: Wire up compat getpeername and getsockname.

2018-11-04T13:50:54+00:00

[ Upstream commit 1f2b5b8e2df4591fbca430aff9c5a072dcc0f408 ]

Fixes: 8b30ca73b7cc ("sparc: Add all necessary direct socket system calls.")
Reported-by: Joseph Myers  
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc64: Make corrupted user stacks more debuggable.

2018-11-04T13:50:54+00:00

[ Upstream commit 5b4fc3882a649c9411dd0dcad2ddb78e911d340e ]

Right now if we get a corrupted user stack frame we do a
do_exit(SIGILL) which is not helpful.

If under a debugger, this behavior causes the inferior process to
exit.  So the register and other state cannot be examined at the time
of the event.

Instead, conditionally log a rate limited kernel log message and then
force a SIGSEGV.

With bits and ideas borrowed (as usual) from powerpc.

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc64: Export __node_distance.

2018-11-04T13:50:53+00:00

[ Upstream commit 2b4792eaa9f553764047d157365ed8b7787751a3 ]

Some drivers reference it via node_distance(), for example the
NVME host driver core.

ERROR: "__node_distance" [drivers/nvme/host/nvme-core.ko] undefined!
make[1]: *** [scripts/Makefile.modpost:92: __modpost] Error 1

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2018-10-20T13:04:23+00:00

Ingo writes:
  "x86 fixes:

   It's 4 misc fixes, 3 build warning fixes and 3 comment fixes.

   In hindsight I'd have left out the 3 comment fixes to make the pull
   request look less scary at such a late point in the cycle. :-/"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/swiotlb: Enable swiotlb for > 4GiG RAM on 32-bit kernels
  x86/fpu: Fix i486 + no387 boot crash by only saving FPU registers on context switch if there is an FPU
  x86/fpu: Remove second definition of fpu in __fpu__restore_sig()
  x86/entry/64: Further improve paranoid_entry comments
  x86/entry/32: Clear the CS high bits
  x86/boot: Add -Wno-pointer-sign to KBUILD_CFLAGS
  x86/time: Correct the attribute on jiffies' definition
  x86/entry: Add some paranoid entry/exit CR3 handling comments
  x86/percpu: Fix this_cpu_read()
  x86/tsc: Force inlining of cyc2ns bits

x86/swiotlb: Enable swiotlb for > 4GiG RAM on 32-bit kernels

2018-10-19T05:49:32+00:00

We already build the swiotlb code for 32-bit kernels with PAE support,
but the code to actually use swiotlb has only been enabled for 64-bit
kernels for an unknown reason.

Before Linux v4.18 we paper over this fact because the networking code,
the SCSI layer and some random block drivers implemented their own
bounce buffering scheme.

[ mingo: Changelog fixes. ]

Fixes: 21e07dba9fb1 ("scsi: reduce use of block bounce buffers")
Fixes: ab74cfebafa3 ("net: remove the PCI_DMA_BUS_IS_PHYS check in illegal_highdma")
Reported-by: Matthew Whitehead 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Thomas Gleixner 
Tested-by: Matthew Whitehead 
Cc: konrad.wilk@oracle.com
Cc: iommu@lists.linux-foundation.org
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20181014075208.2715-1-hch@lst.de
Signed-off-by: Ingo Molnar

sparc: vDSO: Silence an uninitialized variable warning

2018-10-18T04:55:02+00:00

Smatch complains that "val" would be uninitialized if kstrtoul() fails.

Fixes: 9a08862a5d2e ("vDSO for sparc")
Signed-off-by: Dan Carpenter 
Signed-off-by: David S. Miller

sparc: Fix syscall fallback bugs in VDSO.

2018-10-18T04:29:23+00:00

First, the trap number for 32-bit syscalls is 0x10.

Also, only negate the return value when syscall error is indicated by
the carry bit being set.

Signed-off-by: David S. Miller

Merge branch 'parisc-4.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

2018-10-17T12:01:00+00:00

Helge writes:
   "parisc fix:

    Fix an unitialized variable usage in the parisc unwind code."

* 'parisc-4.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Fix uninitialized variable usage in unwind.c

x86/fpu: Fix i486 + no387 boot crash by only saving FPU registers on context switch if there is an FPU

2018-10-17T10:30:38+00:00

Booting an i486 with "no387 nofxsr" ends with with the following crash:

   math_emulate: 0060:c101987d
   Kernel panic - not syncing: Math emulation needed in kernel

on the first context switch in user land.

The reason is that copy_fpregs_to_fpstate() tries FNSAVE which does not work
as the FPU is turned off.

This bug was introduced in:

  f1c8cd0176078 ("x86/fpu: Change fpu->fpregs_active users to fpu->fpstate_active")

Add a check for X86_FEATURE_FPU before trying to save FPU registers (we
have such a check in switch_fpu_finish() already).

Signed-off-by: Sebastian Andrzej Siewior 
Reviewed-by: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Dave Hansen 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: stable@vger.kernel.org
Fixes: f1c8cd0176078 ("x86/fpu: Change fpu->fpregs_active users to fpu->fpstate_active")
Link: http://lkml.kernel.org/r/20181016202525.29437-4-bigeasy@linutronix.de
Signed-off-by: Ingo Molnar

x86/fpu: Remove second definition of fpu in fpurestore_sig()

2018-10-17T10:30:31+00:00

Commit:

  c5bedc6847c3b ("x86/fpu: Get rid of PF_USED_MATH usage, convert it to fpu->fpstate_active")

introduced the 'fpu' variable at top of __restore_xstate_sig(),
which now shadows the other definition:

  arch/x86/kernel/fpu/signal.c:318:28: warning: symbol 'fpu' shadows an earlier one
  arch/x86/kernel/fpu/signal.c:271:20: originally declared here

Remove the shadowed definition of 'fpu', as the two definitions are the same.

Signed-off-by: Sebastian Andrzej Siewior 
Reviewed-by: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Dave Hansen 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Fixes: c5bedc6847c3b ("x86/fpu: Get rid of PF_USED_MATH usage, convert it to fpu->fpstate_active")
Link: http://lkml.kernel.org/r/20181016202525.29437-3-bigeasy@linutronix.de
Signed-off-by: Ingo Molnar