linux-stable.git/arch/um/kernel/skas, branch linux-4.2.y Linux kernel stable tree um: Handle tracehook_report_syscall_entry() result 2015-05-31T20:59:03+00:00 Richard Weinberger richard@nod.at 2015-05-31T20:59:03+00:00 5334cdae407a5778a297a98a75ca61140e37ebfa tracehook_report_syscall_entry() is allowed to fail, in case of failure we have to abort the current syscall. Signed-off-by: Richard Weinberger <richard@nod.at> 
tracehook_report_syscall_entry() is allowed to fail,
in case of failure we have to abort the current syscall.

Signed-off-by: Richard Weinberger <richard@nod.at>
um: Rework uaccess code 2015-05-31T15:32:36+00:00 Richard Weinberger richard@nod.at 2015-05-11T22:17:28+00:00 f8d65d27e677da0ce33de570e3068308a77ed2b1 Rework UML's uaccess code to reuse as much as possible from asm-generic/uaccess.c. Signed-off-by: Richard Weinberger <richard@nod.at> 
Rework UML's uaccess code to reuse as much as possible
from asm-generic/uaccess.c.

Signed-off-by: Richard Weinberger <richard@nod.at>
um: Use char[] for linker script address declarations 2015-05-31T11:14:06+00:00 Nicolas Iooss nicolas.iooss_linux@m4x.org 2014-10-12T11:02:12+00:00 05eacfd00ccf239a24cfb409b084fa126c2e9468 The linker script defines some variables which are declared either with type char[] in include/asm-generic/sections.h or with a meaningless integer type in arch/um/include/asm/sections.h. Fix this inconsistency by declaring every variable char[]. Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org> Signed-off-by: Richard Weinberger <richard@nod.at> 
The linker script defines some variables which are declared either with
type char[] in include/asm-generic/sections.h or with a meaningless
integer type in arch/um/include/asm/sections.h.

Fix this inconsistency by declaring every variable char[].

Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: Create asm/sections.h 2015-05-31T11:14:05+00:00 Nicolas Iooss nicolas.iooss_linux@m4x.org 2014-10-12T11:02:11+00:00 d5f20be7cab85e6e701751323eea77c7935ae522 arch/um/kernel/dyn.lds.S and arch/um/kernel/uml.lds.S define some UML-specific symbols. These symbols are used in the kernel part of UML with extern declarations. Move these declarations to a new header, asm/sections.h, like other architectures do. Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org> Signed-off-by: Richard Weinberger <richard@nod.at> 
arch/um/kernel/dyn.lds.S and arch/um/kernel/uml.lds.S define some
UML-specific symbols.  These symbols are used in the kernel part of UML
with extern declarations.

Move these declarations to a new header, asm/sections.h, like other
architectures do.

Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: Remove broken SMP support 2015-04-13T19:00:58+00:00 Richard Weinberger richard@nod.at 2015-03-18T20:42:54+00:00 28fa468f53163bc0b867b4cc75a9e36e7ed4dbbd At times where UML used the TT mode to operate it had kind of SMP support. It never got finished nor was stable. Let's rip out that cruft and stop confusing developers which do tree-wide SMP cleanups. If someone wants SMP support UML it has do be done from scratch. Signed-off-by: Richard Weinberger <richard@nod.at> 
At times where UML used the TT mode to operate it had
kind of SMP support. It never got finished nor was
stable.
Let's rip out that cruft and stop confusing developers
which do tree-wide SMP cleanups.

If someone wants SMP support UML it has do be done from scratch.

Signed-off-by: Richard Weinberger <richard@nod.at>
um: Remove SKAS3/4 support 2015-04-13T19:00:53+00:00 Richard Weinberger richard@nod.at 2015-03-18T20:31:27+00:00 d0b5e15f0c0fdd759dd3dd48dc2dc2e7199e0da0 Before we had SKAS0 UML had two modes of operation TT (tracing thread) and SKAS3/4 (separated kernel address space). TT was known to be insecure and got removed a long time ago. SKAS3/4 required a few (3 or 4) patches on the host side which never went mainline. The last host patch is 10 years old. With SKAS0 mode (separated kernel address space using 0 host patches), default since 2005, SKAS3/4 is obsolete and can be removed. Signed-off-by: Richard Weinberger <richard@nod.at> 
Before we had SKAS0 UML had two modes of operation
TT (tracing thread) and SKAS3/4 (separated kernel address space).
TT was known to be insecure and got removed a long time ago.
SKAS3/4 required a few (3 or 4) patches on the host side which never went
mainline. The last host patch is 10 years old.

With SKAS0 mode (separated kernel address space using 0 host patches),
default since 2005, SKAS3/4 is obsolete and can be removed.

Signed-off-by: Richard Weinberger <richard@nod.at>
um: Mark stub pages mapping with VM_PFNMAP 2013-07-19T08:45:17+00:00 Richard Weinberger richard@nod.at 2013-05-12T21:26:03+00:00 dee20035b42d569984d2c16041b51e4d75e233b5 Ensure that a process cannot destroy his stub pages with using MADV_DONTNEED and friends. Reported-by: toralf.foerster@gmx.de Signed-off-by: Richard Weinberger <richard@nod.at> 
Ensure that a process cannot destroy his stub pages with
using MADV_DONTNEED and friends.

Reported-by: toralf.foerster@gmx.de
Signed-off-by: Richard Weinberger <richard@nod.at>
um: Fix return value of strnlen_user() 2013-07-19T08:45:17+00:00 Richard Weinberger richard@nod.at 2013-05-11T13:35:32+00:00 3179ce7254ffa43f3ba4409f31a954ecc4a8d408 In case of an error it must not return -EFAULT. Return 0 like all other archs do. Reported-by: toralf.foerster@gmx.de Signed-off-by: Richard Weinberger <richard@nod.at> 
In case of an error it must not return -EFAULT.
Return 0 like all other archs do.

Reported-by: toralf.foerster@gmx.de
Signed-off-by: Richard Weinberger <richard@nod.at>
um: get rid of pointless include "..." where include <...> will do 2012-10-09T20:28:45+00:00 Al Viro viro@ZenIV.linux.org.uk 2012-10-08T02:27:32+00:00 37185b33240870719b6b5913a46e6a441f1ae96f Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: split syscall_trace(), pass pt_regs to it 2012-08-01T22:25:38+00:00 Al Viro viro@zeniv.linux.org.uk 2012-05-23T04:18:33+00:00 1bfa2317b21750f739b59ab6df2c8efb12875045 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> [richard@nod.at: Fixed some minor build issues] Signed-off-by: Richard Weinberger <richard@nod.at> 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
[richard@nod.at: Fixed some minor build issues]
Signed-off-by: Richard Weinberger <richard@nod.at>