From: Matthew Wilcox <willy@infradead.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, linux-xfs@vger.kernel.org,
linux-kernel@vger.kernel.org,
"Christian König" <christian.koenig@amd.com>,
"Jan Kara" <jack@suse.cz>, "Jérôme Glisse" <jglisse@redhat.com>
Subject: [PATCH] Initialise mmu_notifier_range correctly
Date: Wed, 2 Jan 2019 16:21:26 -0800 [thread overview]
Message-ID: <20190103002126.GM6310@bombadil.infradead.org> (raw)
One of the paths in follow_pte_pmd() initialised the mmu_notifier_range
incorrectly.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Fixes: ac46d4f3c432 ("mm/mmu_notifier: use structure for invalidate_range_start/end calls v2")
Tested-by: Dave Chinner <dchinner@redhat.com>
diff --git a/mm/memory.c b/mm/memory.c
index 2dd2f9ab57f4..21a650368be0 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4078,8 +4078,8 @@ static int __follow_pte_pmd(struct mm_struct *mm, unsigned long address,
goto out;
if (range) {
- range->start = address & PAGE_MASK;
- range->end = range->start + PAGE_SIZE;
+ mmu_notifier_range_init(range, mm, address & PAGE_MASK,
+ (address & PAGE_MASK) + PAGE_SIZE);
mmu_notifier_invalidate_range_start(range);
}
ptep = pte_offset_map_lock(mm, pmd, address, ptlp);
next reply other threads:[~2019-01-03 0:21 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-03 0:21 Matthew Wilcox [this message]
2019-01-03 1:56 ` [PATCH] Initialise mmu_notifier_range correctly Jerome Glisse
2019-01-03 3:32 ` John Hubbard
2019-01-03 4:18 ` Matthew Wilcox
2019-01-03 14:29 ` Jerome Glisse
2019-01-03 14:39 ` Matthew Wilcox
2019-01-03 14:59 ` Jerome Glisse
2019-01-03 14:31 ` Jerome Glisse
2019-01-03 14:36 ` Matthew Wilcox
2019-01-03 14:43 ` Matthew Wilcox
2019-01-03 15:05 ` Jerome Glisse
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