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linux/arch/powerpc/mm
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Christophe Leroy cae5e66dde powerpc/mm: Don't log user reads to 0xffffffff 
[ Upstream commit 0f9aee0cb9 ]

Running vdsotest leaves many times the following log:

  [   79.629901] vdsotest[396]: User access of kernel address (ffffffff) - exploit attempt? (uid: 0)

A pointer set to (-1) is likely a programming error similar to
a NULL pointer and is not worth logging as an exploit attempt.

Don't log user accesses to 0xffffffff.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/0728849e826ba16f1fbd6fa7f5c6cc87bd64e097.1577087627.git.christophe.leroy@c-s.fr
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2020-02-24 08:38:44 +01:00
..
book3s32 powerpc/32s: automatically allocate BAT in setbat() 2019-11-19 19:38:38 +11:00
book3s64 powerpc/mmu_gather: enable RCU_TABLE_FREE even for !SMP case 2020-02-11 04:36:48 -08:00
kasan powerpc/mm: Fix an Oops in kasan_mmu_init() 2019-09-21 08:36:53 +10:00
nohash powerpc/8xx: fix bogus __init on mmu_mapin_ram_chunk() 2019-12-16 23:15:16 +11:00
ptdump powerpc/ptdump: Fix W+X verification 2020-02-11 04:36:48 -08:00
copro_fault.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153 2019-05-30 11:26:32 -07:00
dma-noncoherent.c dma-mapping: drop the dev argument to arch_sync_dma_for_* 2019-11-20 20:31:38 +01:00
drmem.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
fault.c powerpc/mm: Don't log user reads to 0xffffffff 2020-02-24 08:38:44 +01:00
highmem.c powerpc/highmem: Change BUG_ON() to WARN_ON() 2019-04-20 22:02:11 +10:00
hugetlbpage.c mm: introduce compound_nr() 2019-09-24 15:54:08 -07:00
init-common.c powerpc: introduce kernstart_virt_addr to store the kernel base 2019-11-13 19:27:32 +11:00
init_32.c powerpc: move memstart_addr and kernstart_addr to init-common.c 2019-11-13 19:27:28 +11:00
init_64.c Merge branch 'topic/kaslr-book3e32' into next 2019-11-14 19:23:33 +11:00
ioremap.c powerpc/mm: split out early ioremap path. 2019-08-27 13:03:35 +10:00
ioremap_32.c powerpc/ioremap: warn on early use of ioremap() 2019-11-19 19:38:38 +11:00
ioremap_64.c powerpc/ioremap: warn on early use of ioremap() 2019-11-19 19:38:38 +11:00
Makefile powerpc/mm: Move ioremap functions out of pgtable_32/64.c 2019-08-27 13:03:35 +10:00
mem.c mm/memory_hotplug: shrink zones when offlining memory 2020-01-04 13:55:08 -08:00
mmap.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
mmu_context.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
mmu_decl.h powerpc/fsl_booke/kaslr: clear the original kernel if randomized 2019-11-13 19:27:44 +11:00
numa.c powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
pgtable-frag.c mm: treewide: clarify pgtable_page_{ctor,dtor}() naming 2019-09-26 10:10:44 -07:00
pgtable.c powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
pgtable_32.c powerpc/ptdump: Fix W+X verification call in mark_rodata_ro() 2020-02-14 16:53:02 -05:00
pgtable_64.c powerpc/mm: Move ioremap functions out of pgtable_32/64.c 2019-08-27 13:03:35 +10:00
slice.c powerpc/mm: Mark get_slice_psize() & slice_addr_is_low() as notrace 2019-12-23 21:12:51 +11:00