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a00196a272
linux/arch/powerpc
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Nicholas Piggin a00196a272 powerpc/64s: __find_linux_pte() synchronization vs pmdp_invalidate() 
The change to pmdp_invalidate() to mark the pmd with _PAGE_INVALID
broke the synchronisation against lock free lookups,
__find_linux_pte()'s pmd_none() check no longer returns true for such
cases.

Fix this by adding a check for this condition as well.

Fixes: da7ad366b4 ("powerpc/mm/book3s: Update pmd_present to look at _PAGE_PRESENT bit")
Cc: stable@vger.kernel.org # v4.20+
Suggested-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-06-07 16:28:28 +10:00
..
boot treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 40 2019-05-24 17:27:12 +02:00
configs This pull request contains the following changes for MTD: 2019-05-12 17:57:52 -04:00
crypto treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
include powerpc/64s: Fix THP PMD collapse serialisation 2019-06-07 16:26:44 +10:00
kernel powerpc: Fix kexec failure on book3s/32 2019-06-07 16:24:47 +10:00
kvm treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 114 2019-05-24 17:39:01 +02:00
lib powerpc: disable KASAN instrumentation on early/critical files. 2019-05-03 01:20:26 +10:00
math-emu powerpc: math-emu: remove unneeded header search paths 2019-01-14 20:39:27 +11:00
mm powerpc/64s: __find_linux_pte() synchronization vs pmdp_invalidate() 2019-06-07 16:28:28 +10:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2019-03-16 12:20:08 -07:00
oprofile
perf treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 112 2019-05-24 17:39:01 +02:00
platforms treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118 2019-05-24 17:39:02 +02:00
purgatory powerpc: disable KASAN instrumentation on early/critical files. 2019-05-03 01:20:26 +10:00
sysdev treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
tools
xmon treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 76 2019-05-24 17:37:51 +02:00
Kbuild
Kconfig mm: memblock: make keeping memblock memory opt-in rather than opt-out 2019-05-14 09:47:50 -07:00
Kconfig.debug powerpc/xmon: add read-only mode 2019-05-03 02:54:57 +10:00
Makefile treewide: prefix header search paths with $(srctree)/ 2019-05-18 11:49:57 +09:00
Makefile.postlink