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| author | Vasily Gorbik <gor@linux.ibm.com> | 2020-08-21 19:27:36 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2020-08-26 19:07:05 +0300 |
| commit | bffc2f7aa96343f91931272d7a8a2d8d925e1ab2 (patch) | |
| tree | 855eed55c1c17572f79f94b60bef421601e28680 /arch | |
| parent | 1196f12a2c960951d02262af25af0bb1775ebcc2 (diff) | |
| download | linux-bffc2f7aa96343f91931272d7a8a2d8d925e1ab2.tar.xz | |
s390/vmem: fix vmem_add_range for 4-level paging
The kernel currently crashes if 4-level paging is used. Add missing
p4d_populate for just allocated pud entry.
Fixes: 3e0d3e408e63 ("s390/vmem: consolidate vmem_add_range() and vmem_remove_range()")
Reviewed-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/mm/vmem.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index 1aed1a4dfc2d..eddf71c22875 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -402,6 +402,7 @@ static int modify_p4d_table(pgd_t *pgd, unsigned long addr, unsigned long end, pud = vmem_crst_alloc(_REGION3_ENTRY_EMPTY); if (!pud) goto out; + p4d_populate(&init_mm, p4d, pud); } ret = modify_pud_table(p4d, addr, next, add, direct); if (ret) |