diff options
Diffstat (limited to 'arch/powerpc/mm/copro_fault.c')
| -rw-r--r-- | arch/powerpc/mm/copro_fault.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/mm/copro_fault.c b/arch/powerpc/mm/copro_fault.c index bb0354222b11..aaa7ec6788b9 100644 --- a/arch/powerpc/mm/copro_fault.c +++ b/arch/powerpc/mm/copro_fault.c @@ -106,6 +106,8 @@ int copro_calculate_slb(struct mm_struct *mm, u64 ea, struct copro_slb *slb) switch (REGION_ID(ea)) { case USER_REGION_ID: pr_devel("%s: 0x%llx -- USER_REGION_ID\n", __func__, ea); + if (mm == NULL) + return 1; psize = get_slice_psize(mm, ea); ssize = user_segment_size(ea); vsid = get_vsid(mm->context.id, ea, ssize); @@ -132,6 +134,9 @@ int copro_calculate_slb(struct mm_struct *mm, u64 ea, struct copro_slb *slb) pr_debug("%s: invalid region access at %016llx\n", __func__, ea); return 1; } + /* Bad address */ + if (!vsid) + return 1; vsid = (vsid << slb_vsid_shift(ssize)) | vsidkey; |
