diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-12-18 13:58:37 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-12-20 13:46:20 -0800 |
| commit | 39ebd6dce62d8cfe3864e16148927a139f11bc9a (patch) | |
| tree | 4f4f8bf8c76244f796cf8d44610d296e1a6a5ef6 /mm | |
| parent | c79c5a0a00a9457718056b588f312baadf44e471 (diff) | |
mm/memory-failure: cast index to loff_t before shifting it
On 32-bit systems, we'll lose the top bits of index because arithmetic
will be performed in unsigned long instead of unsigned long long. This
affects files over 4GB in size.
Link: https://lkml.kernel.org/r/20231218135837.3310403-4-willy@infradead.org
Fixes: 6100e34b2526 ("mm, memory_failure: Teach memory_failure() about dev_pagemap pages")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory-failure.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 82e15baabb48..455093f73a70 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1704,7 +1704,7 @@ static void unmap_and_kill(struct list_head *to_kill, unsigned long pfn, * mapping being torn down is communicated in siginfo, see * kill_proc() */ - loff_t start = (index << PAGE_SHIFT) & ~(size - 1); + loff_t start = ((loff_t)index << PAGE_SHIFT) & ~(size - 1); unmap_mapping_range(mapping, start, size, 0); } |