The patch titled
Subject: mm-fadvise-fix-signed-overflow-ubsan-complaint-fix
has been removed from the -mm tree. Its filename was
mm-fadvise-fix-signed-overflow-ubsan-complaint-fix.patch
This patch was dropped because it was folded into mm-fadvise-fix-signed-overflow-ubsan-complaint.patch
------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-fadvise-fix-signed-overflow-ubsan-complaint-fix
add comment explaining the casts
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: <icytxw@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/fadvise.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/mm/fadvise.c~mm-fadvise-fix-signed-overflow-ubsan-complaint-fix
+++ a/mm/fadvise.c
@@ -72,7 +72,11 @@ int ksys_fadvise64_64(int fd, loff_t off
goto out;
}
- /* Careful about overflows. Len == 0 means "as much as possible" */
+ /*
+ * Careful about overflows. Len == 0 means "as much as possible". Use
+ * unsigned math because signed overflows are undefined and UBSan
+ * complains.
+ */
endbyte = (u64)offset + (u64)len;
if (!len || endbyte < len)
endbyte = -1;
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
mm-list_lruc-fold-__list_lru_count_one-into-its-caller.patch
mm-fadvise-fix-signed-overflow-ubsan-complaint.patch
mm-sparsemem-defer-the-ms-section_mem_map-clearing-fix.patch
mm-sparse-optimize-memmap-allocation-during-sparse_init-checkpatch-fixes.patch
mm-sparse-abstract-sparse-buffer-allocations-fix.patch
mm-sparse-abstract-sparse-buffer-allocations-fix-fix.patch
