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ba385c0594
linux/arch
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Gerald Schaefer ba385c0594 s390/mm: fix write access check in gup_huge_pmd() 
The check for the _SEGMENT_ENTRY_PROTECT bit in gup_huge_pmd() is the
wrong way around. It must not be set for write==1, and not be checked for
write==0. Fix this similar to how it was fixed for ptes long time ago in
commit 25591b0703 ("[S390] fix get_user_pages_fast").

One impact of this bug would be unnecessarily using the gup slow path for
write==0 on r/w mappings. A potentially more severe impact would be that
gup_huge_pmd() will succeed for write==1 on r/o mappings.

Cc: <stable@vger.kernel.org>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-09-19 08:36:20 +02:00
..
alpha Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2017-09-11 18:34:47 -07:00
arc ARC changes for 4.14-rc1 2017-09-08 16:02:18 -07:00
arm dma-mapping updates for 4.14: 2017-09-12 13:30:06 -07:00
arm64 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2017-09-11 18:34:47 -07:00
blackfin Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2017-09-11 18:34:47 -07:00
c6x
cris MTD changes for 4.14: 2017-09-09 14:48:21 -07:00
frv Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2017-09-11 18:34:47 -07:00
h8300 arch: define CPU_BIG_ENDIAN for all fixed big endian archs 2017-09-08 18:26:48 -07:00
hexagon Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-04 11:52:29 -07:00
ia64 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2017-09-11 18:34:47 -07:00
m32r m32r: defconfig: cleanup from old Kconfig options 2017-09-08 18:26:51 -07:00
m68k Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu 2017-09-10 21:07:39 -07:00
metag dma-mapping updates for 4.14: 2017-09-12 13:30:06 -07:00
microblaze Merge branch 'akpm' (patches from Andrew) 2017-09-09 10:30:07 -07:00
mips Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2017-09-11 18:34:47 -07:00
mn10300 mn10300: defconfig: cleanup from old Kconfig options 2017-09-08 18:26:51 -07:00
nios2
openrisc arch: define CPU_BIG_ENDIAN for all fixed big endian archs 2017-09-08 18:26:48 -07:00
parisc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2017-09-11 18:34:47 -07:00
powerpc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2017-09-11 18:34:47 -07:00
s390 s390/mm: fix write access check in gup_huge_pmd() 2017-09-19 08:36:20 +02:00
score
sh dma-mapping updates for 4.14: 2017-09-12 13:30:06 -07:00
sparc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2017-09-11 18:34:47 -07:00
tile dma-mapping updates for 4.14: 2017-09-12 13:30:06 -07:00
um Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-04 09:52:57 -07:00
unicore32
x86 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-12 11:34:39 -07:00
xtensa Merge branch 'akpm' (patches from Andrew) 2017-09-06 20:49:49 -07:00
.gitignore
Kconfig - For the randstruct plugin, enable automatic randomization of structures 2017-09-07 20:30:19 -07:00