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| author |  Claudio Imbrenda <imbrenda@linux.ibm.com>
| 2024-04-16 13:42:19 +0200 |
|---|---|---|
| committer |  Alexander Gordeev <agordeev@linux.ibm.com>
| 2024-04-22 12:47:47 +0200 |
| commit | 843c3280686fc1a83d89ee1e0b5599c9f6b09d0c (patch) | |
| tree | 17cbc7ff76c4a4d6f27e80cf1ff1f0b482eea612 /arch | |
| parent | s390/mm: Fix NULL pointer dereference (diff) | |
| download | linux-843c3280686fc1a83d89ee1e0b5599c9f6b09d0c.tar.gz linux-843c3280686fc1a83d89ee1e0b5599c9f6b09d0c.tar.bz2 linux-843c3280686fc1a83d89ee1e0b5599c9f6b09d0c.zip | |
s390/mm: Fix storage key clearing for guest huge pages
The function __storage_key_init_range() expects the end address to be
the first byte outside the range to be initialized. I.e. end - start
should be the size of the area to be initialized.
The current code works because __storage_key_init_range() will still loop
over every page in the range, but it is slower than using sske_frame().
Fixes: 964c2c05c9f3 ("s390/mm: Clear huge page storage keys on enable_skey")
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Link: https://lore.kernel.org/r/20240416114220.28489-2-imbrenda@linux.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/mm/gmap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c index 094b43b121cd..12d22a7fa32f 100644 --- a/arch/s390/mm/gmap.c +++ b/arch/s390/mm/gmap.c @@ -2661,7 +2661,7 @@ static int __s390_enable_skey_hugetlb(pte_t *pte, unsigned long addr, return 0; start = pmd_val(*pmd) & HPAGE_MASK; - end = start + HPAGE_SIZE - 1; + end = start + HPAGE_SIZE; __storage_key_init_range(start, end); set_bit(PG_arch_1, &page->flags); cond_resched(); |