6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> 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@xxxxxxxxxxxxx Fixes: 6100e34b2526 ("mm, memory_failure: Teach memory_failure() about dev_pagemap pages") Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Cc: Dan Williams <dan.j.williams@xxxxxxxxx> Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- mm/memory-failure.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1705,7 +1705,7 @@ static void unmap_and_kill(struct list_h * 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); }
