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| author | Gerald Schaefer <gerald.schaefer@linux.ibm.com> | 2022-08-19 18:53:43 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2022-08-30 21:57:07 +0200 |
| commit | 7c8d42fdf1a84b1a0dd60d6528309c8ec127e87c (patch) | |
| tree | 41800d2467c9100daff7a8ac84e597099fe9d09c /scripts/gcc-plugins | |
| parent | bdbf57bca6bf0b76a0f2681014552b25917c26e1 (diff) | |
s390/hugetlb: fix prepare_hugepage_range() check for 2 GB hugepages
The alignment check in prepare_hugepage_range() is wrong for 2 GB
hugepages, it only checks for 1 MB hugepage alignment.
This can result in kernel crash in __unmap_hugepage_range() at the
BUG_ON(start & ~huge_page_mask(h)) alignment check, for mappings
created with MAP_FIXED at unaligned address.
Fix this by correctly handling multiple hugepage sizes, similar to the
generic version of prepare_hugepage_range().
Fixes: d08de8e2d867 ("s390/mm: add support for 2GB hugepages")
Cc: <stable@vger.kernel.org> # 4.8+
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'scripts/gcc-plugins')
0 files changed, 0 insertions, 0 deletions