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80b6eb04b5
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Will Deacon 80b6eb04b5 arm64: Don't walk page table for user faults in do_mem_abort 
Commit 42dbf54e88 ("arm64: consistently log ESR and page table")
dumps page table entries for user faults hitting do_bad entries in the
fault handler table. Whilst this shouldn't really happen in practice,
it's not beyond the realms of possibility if e.g. running an old kernel
on a new CPU.

Generally, we want to avoid exposing physical addresses under the control
of userspace (see commit bf396c09c2 ("arm64: mm: don't print out page
table entries on EL0 faults")), so walk the page tables only on exceptions
from EL1.

Reported-by: Kristina Martsenko <kristina.martsenko@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-11-02 13:52:48 +00:00
..
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 arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
arm arm_arch_timer: Expose event stream status 2017-10-13 18:55:05 +01:00
arm64 arm64: Don't walk page table for user faults in do_mem_abort 2017-11-02 13:52:48 +00:00
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 arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
cris MTD changes for 4.14: 2017-09-09 14:48:21 -07:00
frv arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
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 'work.ipc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-09-14 17:37:26 -07:00
m32r arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
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 arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
microblaze arch: change default endian for microblaze 2017-09-25 15:31:26 +02:00
mips pci-v4.14-fixes-2 2017-09-22 13:09:11 -10:00
mn10300 arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
nios2 nios2 update for v4.14-rc1 2017-09-15 12:47:21 -07:00
openrisc OpenRISC patches for 4.14 2017-09-13 11:52:18 -07:00
parisc parisc: Unbreak bootloader due to gcc-7 optimizations 2017-09-22 22:26:43 +02:00
powerpc Mixed bugfixes. Perhaps the most interesting one is a latent bug 2017-09-29 12:18:55 -07:00
s390 s390/topology: enable / disable topology dynamically 2017-09-20 13:47:55 +02:00
score
sh arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
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 Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2017-09-22 13:02:54 -10:00
um um/time: Fixup namespace collision 2017-09-29 10:07:44 +02:00
unicore32
x86 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-10-01 13:55:32 -07:00
xtensa arch: remove unused *_segments() macros/functions 2017-09-22 12:59:52 -10:00
.gitignore
Kconfig - For the randstruct plugin, enable automatic randomization of structures 2017-09-07 20:30:19 -07:00