1. 17 Mar, 2016 2 commits
  2. 13 Mar, 2016 2 commits
    • Alexander Duyck's avatar
      ipv6: Pass proto to csum_ipv6_magic as __u8 instead of unsigned short · 1e940829
      Alexander Duyck authored
      
      
      This patch updates csum_ipv6_magic so that it correctly recognizes that
      protocol is a unsigned 8 bit value.
      
      This will allow us to better understand what limitations may or may not be
      present in how we handle the data.  For example there are a number of
      places that call htonl on the protocol value.  This is likely not necessary
      and can be replaced with a multiplication by ntohl(1) which will be
      converted to a shift by the compiler.
      Signed-off-by: default avatarAlexander Duyck <aduyck@mirantis.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1e940829
    • Alexander Duyck's avatar
      ipv4: Update parameters for csum_tcpudp_magic to their original types · 01cfbad7
      Alexander Duyck authored
      
      
      This patch updates all instances of csum_tcpudp_magic and
      csum_tcpudp_nofold to reflect the types that are usually used as the source
      inputs.  For example the protocol field is populated based on nexthdr which
      is actually an unsigned 8 bit value.  The length is usually populated based
      on skb->len which is an unsigned integer.
      
      This addresses an issue in which the IPv6 function csum_ipv6_magic was
      generating a checksum using the full 32b of skb->len while
      csum_tcpudp_magic was only using the lower 16 bits.  As a result we could
      run into issues when attempting to adjust the checksum as there was no
      protocol agnostic way to update it.
      
      With this change the value is still truncated as many architectures use
      "(len + proto) << 8", however this truncation only occurs for values
      greater than 16776960 in length and as such is unlikely to occur as we stop
      the inner headers at ~64K in size.
      
      I did have to make a few minor changes in the arm, mn10300, nios2, and
      score versions of the function in order to support these changes as they
      were either using things such as an OR to combine the protocol and length,
      or were using ntohs to convert the length which would have truncated the
      value.
      
      I also updated a few spots in terms of whitespace and type differences for
      the addresses.  Most of this was just to make sure all of the definitions
      were in sync going forward.
      Signed-off-by: default avatarAlexander Duyck <aduyck@mirantis.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      01cfbad7
  3. 07 Mar, 2016 1 commit
  4. 15 Feb, 2016 1 commit
  5. 26 Jan, 2016 1 commit
    • Michael S. Tsirkin's avatar
      sh: fix smp_store_mb for !SMP · fb9b050c
      Michael S. Tsirkin authored
      sh variant of smp_store_mb() calls xchg() on !SMP which is stronger than
      implied by both the name and the documentation.
      
      commit 90a3ccb0
      
       ("sh: define __smp_xxx,
      fix smp_store_mb for !SMP") was supposed to fix it but
      left the bug in place.
      
      Drop smp_store_mb, so that code in asm-generic/barrier.h
      will define it correctly depending on CONFIG_SMP.
      Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
      fb9b050c
  6. 20 Jan, 2016 1 commit
    • Christoph Hellwig's avatar
      dma-mapping: always provide the dma_map_ops based implementation · e1c7e324
      Christoph Hellwig authored
      
      
      Move the generic implementation to <linux/dma-mapping.h> now that all
      architectures support it and remove the HAVE_DMA_ATTR Kconfig symbol now
      that everyone supports them.
      
      [valentinrothberg@gmail.com: remove leftovers in Kconfig]
      Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
      Cc: Chris Metcalf <cmetcalf@ezchip.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
      Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
      Cc: Helge Deller <deller@gmx.de>
      Cc: James Hogan <james.hogan@imgtec.com>
      Cc: Jesper Nilsson <jesper.nilsson@axis.com>
      Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
      Cc: Ley Foon Tan <lftan@altera.com>
      Cc: Mark Salter <msalter@redhat.com>
      Cc: Mikael Starvik <starvik@axis.com>
      Cc: Steven Miao <realmz6@gmail.com>
      Cc: Vineet Gupta <vgupta@synopsys.com>
      Cc: Christian Borntraeger <borntraeger@de.ibm.com>
      Cc: Joerg Roedel <jroedel@suse.de>
      Cc: Sebastian Ott <sebott@linux.vnet.ibm.com>
      Signed-off-by: default avatarValentin Rothberg <valentinrothberg@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e1c7e324
  7. 12 Jan, 2016 3 commits
  8. 12 Dec, 2015 1 commit
  9. 16 Oct, 2015 1 commit
  10. 23 Sep, 2015 1 commit
    • Peter Zijlstra's avatar
      atomic, arch: Audit atomic_{read,set}() · 62e8a325
      Peter Zijlstra authored
      
      
      This patch makes sure that atomic_{read,set}() are at least
      {READ,WRITE}_ONCE().
      
      We already had the 'requirement' that atomic_read() should use
      ACCESS_ONCE(), and most archs had this, but a few were lacking.
      All are now converted to use READ_ONCE().
      
      And, by a symmetry and general paranoia argument, upgrade atomic_set()
      to use WRITE_ONCE().
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Dmitry Vyukov <dvyukov@google.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: james.hogan@imgtec.com
      Cc: linux-kernel@vger.kernel.org
      Cc: oleg@redhat.com
      Cc: will.deacon@arm.com
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      62e8a325
  11. 10 Sep, 2015 5 commits
    • Christoph Hellwig's avatar
      dma-mapping: consolidate dma_set_mask · 452e06af
      Christoph Hellwig authored
      
      
      Almost everyone implements dma_set_mask the same way, although some time
      that's hidden in ->set_dma_mask methods.
      
      This patch consolidates those into a common implementation that either
      calls ->set_dma_mask if present or otherwise uses the default
      implementation.  Some architectures used to only call ->set_dma_mask
      after the initial checks, and those instance have been fixed to do the
      full work.  h8300 implemented dma_set_mask bogusly as a no-ops and has
      been fixed.
      
      Unfortunately some architectures overload unrelated semantics like changing
      the dma_ops into it so we still need to allow for an architecture override
      for now.
      
      [jcmvbkbc@gmail.com: fix xtensa]
      Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Michal Simek <monstr@monstr.eu>
      Cc: Jonas Bonn <jonas@southpole.se>
      Cc: Chris Metcalf <cmetcalf@ezchip.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
      Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      452e06af
    • Christoph Hellwig's avatar
      dma-mapping: consolidate dma_supported · ee196371
      Christoph Hellwig authored
      
      
      Most architectures just call into ->dma_supported, but some also return 1
      if the method is not present, or 0 if no dma ops are present (although
      that should never happeb). Consolidate this more broad version into
      common code.
      
      Also fix h8300 which inorrectly always returned 0, which would have been
      a problem if it's dma_set_mask implementation wasn't a similarly buggy
      noop.
      
      As a few architectures have much more elaborate implementations, we
      still allow for arch overrides.
      
      [jcmvbkbc@gmail.com: fix xtensa]
      Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Michal Simek <monstr@monstr.eu>
      Cc: Jonas Bonn <jonas@southpole.se>
      Cc: Chris Metcalf <cmetcalf@ezchip.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
      Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      ee196371
    • Christoph Hellwig's avatar
      dma-mapping: cosolidate dma_mapping_error · efa21e43
      Christoph Hellwig authored
      
      
      Currently there are three valid implementations of dma_mapping_error:
      
       (1) call ->mapping_error
       (2) check for a hardcoded error code
       (3) always return 0
      
      This patch provides a common implementation that calls ->mapping_error
      if present, then checks for DMA_ERROR_CODE if defined or otherwise
      returns 0.
      
      [jcmvbkbc@gmail.com: fix xtensa]
      Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Michal Simek <monstr@monstr.eu>
      Cc: Jonas Bonn <jonas@southpole.se>
      Cc: Chris Metcalf <cmetcalf@ezchip.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
      Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      efa21e43
    • Christoph Hellwig's avatar
      dma-mapping: consolidate dma_{alloc,free}_noncoherent · 1e893752
      Christoph Hellwig authored
      
      
      Most architectures do not support non-coherent allocations and either
      define dma_{alloc,free}_noncoherent to their coherent versions or stub
      them out.
      
      Openrisc uses dma_{alloc,free}_attrs to implement them, and only Mips
      implements them directly.
      
      This patch moves the Openrisc version to common code, and handles the
      DMA_ATTR_NON_CONSISTENT case in the mips dma_map_ops instance.
      
      Note that actual non-coherent allocations require a dma_cache_sync
      implementation, so if non-coherent allocations didn't work on
      an architecture before this patch they still won't work after it.
      
      [jcmvbkbc@gmail.com: fix xtensa]
      Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Michal Simek <monstr@monstr.eu>
      Cc: Jonas Bonn <jonas@southpole.se>
      Cc: Chris Metcalf <cmetcalf@ezchip.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
      Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1e893752
    • Christoph Hellwig's avatar
      dma-mapping: consolidate dma_{alloc,free}_{attrs,coherent} · 6894258e
      Christoph Hellwig authored
      
      
      Since 2009 we have a nice asm-generic header implementing lots of DMA API
      functions for architectures using struct dma_map_ops, but unfortunately
      it's still missing a lot of APIs that all architectures still have to
      duplicate.
      
      This series consolidates the remaining functions, although we still need
      arch opt outs for two of them as a few architectures have very
      non-standard implementations.
      
      This patch (of 5):
      
      The coherent DMA allocator works the same over all architectures supporting
      dma_map operations.
      
      This patch consolidates them and converges the minor differences:
      
       - the debug_dma helpers are now called from all architectures, including
         those that were previously missing them
       - dma_alloc_from_coherent and dma_release_from_coherent are now always
         called from the generic alloc/free routines instead of the ops
         dma-mapping-common.h always includes dma-coherent.h to get the defintions
         for them, or the stubs if the architecture doesn't support this feature
       - checks for ->alloc / ->free presence are removed.  There is only one
         magic instead of dma_map_ops without them (mic_dma_ops) and that one
         is x86 only anyway.
      
      Besides that only x86 needs special treatment to replace a default devices
      if none is passed and tweak the gfp_flags.  An optional arch hook is provided
      for that.
      
      [linux@roeck-us.net: fix build]
      [jcmvbkbc@gmail.com: fix xtensa]
      Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Michal Simek <monstr@monstr.eu>
      Cc: Jonas Bonn <jonas@southpole.se>
      Cc: Chris Metcalf <cmetcalf@ezchip.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
      Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      6894258e
  12. 14 Aug, 2015 1 commit
    • Dan Williams's avatar
      arch: introduce memremap() · 92281dee
      Dan Williams authored
      
      
      Existing users of ioremap_cache() are mapping memory that is known in
      advance to not have i/o side effects.  These users are forced to cast
      away the __iomem annotation, or otherwise neglect to fix the sparse
      errors thrown when dereferencing pointers to this memory.  Provide
      memremap() as a non __iomem annotated ioremap_*() in the case when
      ioremap is otherwise a pointer to cacheable memory. Empirically,
      ioremap_<cacheable-type>() call sites are seeking memory-like semantics
      (e.g.  speculative reads, and prefetching permitted).
      
      memremap() is a break from the ioremap implementation pattern of adding
      a new memremap_<type>() for each mapping type and having silent
      compatibility fall backs.  Instead, the implementation defines flags
      that are passed to the central memremap() and if a mapping type is not
      supported by an arch memremap returns NULL.
      
      We introduce a memremap prototype as a trivial wrapper of
      ioremap_cache() and ioremap_wt().  Later, once all ioremap_cache() and
      ioremap_wt() usage has been removed from drivers we teach archs to
      implement arch_memremap() with the ability to strictly enforce the
      mapping type.
      
      Cc: Arnd Bergmann <arnd@arndb.de>
      Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
      Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
      92281dee
  13. 04 Aug, 2015 1 commit
  14. 29 Jul, 2015 1 commit
    • Luis R. Rodriguez's avatar
      arch/*/io.h: Add ioremap_uc() to all architectures · 4c73e892
      Luis R. Rodriguez authored
      
      
      This adds ioremap_uc() only for architectures that do not
      include asm-generic.h/io.h as that already provides a default
      definition for them for both cases where you have CONFIG_MMU
      and you do not, and because of this, the number of architectures
      this patch address is less than the architectures that the
      ioremap_wt() patch addressed, "arch/*/io.h: Add ioremap_wt() to
      all architectures").
      
      In order to reduce the number of architectures we have to
      modify by adding new architecture IO APIs we'll have to review
      the architectures in this patch, see why they can't add
      asm-generic.h/io.h or issues that would be created by doing
      so and then spread a consistent inclusion of this header
      towards the end of their own header. For instance arch/metag
      includes the asm-generic/io.h *before* the ioremap*()
      definitions, this should be the other way around but only
      once we have guard wrappers for the non-MMU case also for
      asm-generic/io.h.
      Reported-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
      Signed-off-by: default avatarLuis R. Rodriguez <mcgrof@suse.com>
      Cc: Abhilash Kesavan <a.kesavan@samsung.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: Chris Metcalf <cmetcalf@ezchip.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Fengguang Wu <fengguang.wu@intel.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: Greg Ungerer <gerg@uclinux.org>
      Cc: Guenter Roeck <linux@roeck-us.net>
      Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
      Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
      Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
      Cc: Kyle McMartin <kyle@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Michael Ellerman <mpe@ellerman.id.au>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Hurley <peter@hurleysoftware.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Rob Herring <robh@kernel.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Toshi Kani <toshi.kani@hp.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: linux-am33-list@redhat.com
      Cc: linux-arch@vger.kernel.org
      Cc: linux-m68k@lists.linux-m68k.org
      Cc: linux-sh@vger.kernel.org
      Cc: linuxppc-dev@lists.ozlabs.org
      Link: http://lkml.kernel.org/r/20150728181713.GB30479@wotan.suse.de
      
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      4c73e892
  15. 27 Jul, 2015 3 commits
  16. 20 Jul, 2015 1 commit
  17. 17 Jul, 2015 1 commit
  18. 25 Jun, 2015 1 commit
  19. 24 Jun, 2015 2 commits
    • Zhang Zhen's avatar
      mm/hugetlb: reduce arch dependent code about hugetlb_prefault_arch_hook · a67a31fa
      Zhang Zhen authored
      
      
      Currently we have many duplicates in definitions of
      hugetlb_prefault_arch_hook.  In all architectures this function is empty.
      Signed-off-by: default avatarZhang Zhen <zhenzhang.zhang@huawei.com>
      Acked-by: default avatarDavid Rientjes <rientjes@google.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      a67a31fa
    • Laurent Dufour's avatar
      mm: new mm hook framework · 2ae416b1
      Laurent Dufour authored
      
      
      CRIU is recreating the process memory layout by remapping the checkpointee
      memory area on top of the current process (criu).  This includes remapping
      the vDSO to the place it has at checkpoint time.
      
      However some architectures like powerpc are keeping a reference to the
      vDSO base address to build the signal return stack frame by calling the
      vDSO sigreturn service.  So once the vDSO has been moved, this reference
      is no more valid and the signal frame built later are not usable.
      
      This patch serie is introducing a new mm hook framework, and a new
      arch_remap hook which is called when mremap is done and the mm lock still
      hold.  The next patch is adding the vDSO remap and unmap tracking to the
      powerpc architecture.
      
      This patch (of 3):
      
      This patch introduces a new set of header file to manage mm hooks:
      - per architecture empty header file (arch/x/include/asm/mm-arch-hooks.h)
      - a generic header (include/linux/mm-arch-hooks.h)
      
      The architecture which need to overwrite a hook as to redefine it in its
      header file, while architecture which doesn't need have nothing to do.
      
      The default hooks are defined in the generic header and are used in the
      case the architecture is not defining it.
      
      In a next step, mm hooks defined in include/asm-generic/mm_hooks.h should
      be moved here.
      Signed-off-by: default avatarLaurent Dufour <ldufour@linux.vnet.ibm.com>
      Suggested-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
      Cc: Hugh Dickins <hughd@google.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Pavel Emelyanov <xemul@parallels.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Michael Ellerman <mpe@ellerman.id.au>
      Cc: Ingo Molnar <mingo@kernel.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      2ae416b1
  20. 08 Jun, 2015 1 commit
  21. 19 May, 2015 2 commits
  22. 13 May, 2015 1 commit
  23. 12 Apr, 2015 1 commit
  24. 09 Mar, 2015 1 commit
  25. 12 Feb, 2015 1 commit
    • Andy Lutomirski's avatar
      all arches, signal: move restart_block to struct task_struct · f56141e3
      Andy Lutomirski authored
      
      
      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: default avatarAndy 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: default avatarRichard 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: default avatarJames Hogan <james.hogan@imgtec.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      f56141e3
  26. 11 Feb, 2015 1 commit
  27. 10 Feb, 2015 1 commit
  28. 13 Jan, 2015 1 commit