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2016-12-24Replace <asm/uaccess.h> with <linux/uaccess.h> globallyLinus Torvalds1-1/+1
This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-21um: extend fpstate to _xstate to support YMM registersEli Cooper1-12/+11
Extends fpstate to _xstate, in order to hold AVX/YMM registers. To avoid oversized stack frame, the following functions have been refactored by using malloc. - sig_handler_common - timer_real_alarm_handler Signed-off-by: Eli Cooper <elicooper@gmx.com>
2016-05-21um: fix FPU state preservation around signal handlersEli Cooper1-15/+3
This patch makes UML saves/restores FPU state from/to the fpstate in pt_regs when setting up or returning from a signal stack, rather than calling ptrace directly. This ensures that FPU state is correctly preserved around signal handlers in a multi-threaded scenario. Signed-off-by: Eli Cooper <elicooper@gmx.com>
2015-12-22um: Fix pointer castMickaël Salaün1-1/+1
Fix a pointer cast typo introduced in v4.4-rc5 especially visible for the i386 subarchitecture where it results in a kernel crash. [ Also removed pointless cast as per Al Viro - Linus ] Fixes: 8090bfd2bb9a ("um: Fix fpstate handling") Signed-off-by: Mickaël Salaün <mic@digikod.net> Cc: Jeff Dike <jdike@addtoit.com> Acked-by: Richard Weinberger <richard@nod.at> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-12-08um: Fix fpstate handlingRichard Weinberger1-8/+10
The x86 FPU cleanup changed fpstate to a plain integer. UML on x86 has to deal with that too. Signed-off-by: Richard Weinberger <richard@nod.at>
2015-05-31um: Fix warning in setup_signal_stack_si()Richard Weinberger1-1/+2
Fixes: arch/x86/um/signal.c: In function ‘setup_signal_stack_si’: include/asm-generic/uaccess.h:146:27: warning: initialization from incompatible pointer type [enabled by default] __typeof__(*(ptr)) __x = (x); \ ^ arch/x86/um/signal.c:544:10: note: in expansion of macro ‘__put_user’ err |= __put_user(ksig->ka.sa.sa_restorer, Signed-off-by: Richard Weinberger <richard@nod.at>
2015-04-12um: Remove signal translation and exec_domainRichard Weinberger1-7/+0
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 <richard@nod.at>
2015-02-12all arches, signal: move restart_block to struct task_structAndy Lutomirski1-1/+1
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. [james.hogan@imgtec.com: metag: align thread_info::supervisor_stack] Signed-off-by: Andy Lutomirski <luto@amacapital.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: David Miller <davem@davemloft.net> Acked-by: Richard Weinberger <richard@nod.at> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Steven Miao <realmz6@gmail.com> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Tested-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Chen Liqin <liqin.linux@gmail.com> Cc: Lennox Wu <lennox.wu@gmail.com> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Guenter Roeck <linux@roeck-us.net> Signed-off-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-06um: Use get_signal() signal_setup_done()Richard Weinberger1-24/+21
Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-07-19um: remove dead codeRichard Weinberger1-1/+0
"me" is not used. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-02-03x86: get rid of pt_regs argument in sigreturn variantsAl Viro1-13/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-12-19new helpers: __save_altstack/__compat_save_altstack, switch x86 and um to thoseAl Viro1-7/+2
note that they are relying on access_ok() already checked by caller. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-09um: get rid of pointless include "..." where include <...> will doAl Viro1-2/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2012-09-27um: let signal_delivered() do SIGTRAP on singlestepping into handlerAl Viro1-6/+0
... rather than duplicating that in sigframe setup code (and doing that inconsistently, at that) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01most of set_current_blocked() callers want SIGKILL/SIGSTOP removed from setAl Viro1-2/+0
Only 3 out of 63 do not. Renamed the current variant to __set_current_blocked(), added set_current_blocked() that will exclude unblockable signals, switched open-coded instances to it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21um: missing checks of __put_user()/__get_user() return valuesAl Viro1-2/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21um/x86: merge (and trim) 32- and 64-bit variants of ptrace.hAl Viro1-11/+11
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21um: ->restart_block.fn needs to be reset on sigreturnAl Viro1-0/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-11-02um: merge signal_{32,64}.cAl Viro1-0/+624
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
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