diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-12-18 13:58:37 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-05 15:18:39 +0100 |
| commit | fb21c9780a316953a61af6657b55f745722783bb (patch) | |
| tree | 4fe23f20a2818199150a5ecfc77a9f5687c56ae3 | |
| parent | be72d197b2281e2ee3f28017fc9be1ab17e26d16 (diff) | |
mm/memory-failure: cast index to loff_t before shifting it
commit 39ebd6dce62d8cfe3864e16148927a139f11bc9a upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 99de0328d1be..c45b8c64cdcd 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1560,7 +1560,7 @@ 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); } |