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linux/arch/powerpc/mm
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Aneesh Kumar K.V 6f4679b956 powerpc/pmem: Fix kernel crash due to wrong range value usage in flush_dcache_range 
This patch fix the below kernel crash.

 BUG: Unable to handle kernel data access on read at 0xc000000380000000
 Faulting instruction address: 0xc00000000008b6f0
cpu 0x5: Vector: 300 (Data Access) at [c0000000d8587790]
    pc: c00000000008b6f0: arch_remove_memory+0x150/0x210
    lr: c00000000008b720: arch_remove_memory+0x180/0x210
    sp: c0000000d8587a20
   msr: 800000000280b033
   dar: c000000380000000
 dsisr: 40000000
  current = 0xc0000000d8558600
  paca    = 0xc00000000fff8f00   irqmask: 0x03   irq_happened: 0x01
    pid   = 1220, comm = ndctl
enter ? for help
 memunmap_pages+0x33c/0x410
 devm_action_release+0x30/0x50
 release_nodes+0x30c/0x3a0
 device_release_driver_internal+0x178/0x240
 unbind_store+0x74/0x190
 drv_attr_store+0x44/0x60
 sysfs_kf_write+0x74/0xa0
 kernfs_fop_write+0x1b0/0x260
 __vfs_write+0x3c/0x70
 vfs_write+0xe4/0x200
 ksys_write+0x7c/0x140
 system_call+0x5c/0x68

Fixes: 076265907c ("powerpc: Chunk calls to flush_dcache_range in arch_*_memory")
Reported-by: Sachin Sant <sachinp@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191204052909.59145-1-aneesh.kumar@linux.ibm.com
2019-12-05 00:11:45 +11:00
..
book3s32 powerpc/32s: automatically allocate BAT in setbat() 2019-11-19 19:38:38 +11:00
book3s64 Merge branch 'akpm' (patches from Andrew) 2019-12-01 20:36:41 -08:00
kasan powerpc/mm: Fix an Oops in kasan_mmu_init() 2019-09-21 08:36:53 +10:00
nohash powerpc/32: Don't populate page tables for block mapped pages except on the 8xx. 2019-11-18 22:27:52 +11:00
ptdump powerpc: use the generic dma coherent remap allocator 2019-08-28 23:19:34 +10:00
copro_fault.c
dma-noncoherent.c dma-mapping: drop the dev argument to arch_sync_dma_for_* 2019-11-20 20:31:38 +01:00
drmem.c
fault.c powerpc/mm: Show if a bad page fault on data is read or write. 2019-11-18 22:27:51 +11:00
highmem.c
hugetlbpage.c mm: introduce compound_nr() 2019-09-24 15:54:08 -07:00
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
init-common.c powerpc: introduce kernstart_virt_addr to store the kernel base 2019-11-13 19:27:32 +11:00
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
ioremap.c powerpc/mm: split out early ioremap path. 2019-08-27 13:03:35 +10:00
Makefile powerpc/mm: Move ioremap functions out of pgtable_32/64.c 2019-08-27 13:03:35 +10:00
mem.c powerpc/pmem: Fix kernel crash due to wrong range value usage in flush_dcache_range 2019-12-05 00:11:45 +11:00
mmap.c
mmu_context.c
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_32.c powerpc/32: Don't populate page tables for block mapped pages except on the 8xx. 2019-11-18 22:27:52 +11:00
pgtable_64.c powerpc/mm: Move ioremap functions out of pgtable_32/64.c 2019-08-27 13:03:35 +10:00
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
slice.c