The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 39ebd6dce62d8cfe3864e16148927a139f11bc9a # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024010255-buccaneer-rockfish-3014@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

39ebd6dce62d ("mm/memory-failure: cast index to loff_t before shifting it") 00cc790e0036 ("mm: factor helpers for memory_failure_dev_pagemap") f25cbb7a95a2 ("mm: add zone device coherent type memory support") 034e5afad921 ("mm: re-allow pinning of zero pfns") 1c563432588d ("mm: fix is_pinnable_page against a cma page") 405ce051236c ("mm/hwpoison: fix race between hugetlb free/demotion and memory_failure_hugetlb()") 9030fb0bb9d6 ("Merge tag 'folio-5.18c' of git://git.infradead.org/users/willy/pagecache")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 39ebd6dce62d8cfe3864e16148927a139f11bc9a Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" willy@infradead.org Date: Mon, 18 Dec 2023 13:58:37 +0000 Subject: [PATCH] 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

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); }