diff options
| author | Kemeng Shi <shikemeng@huaweicloud.com> | 2025-05-22 20:25:53 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-07-24 19:12:34 -0700 |
| commit | 152c1339dc13ad46f1b136e8693de15980750835 (patch) | |
| tree | 295bf98065e39378dc2d541ae3b784d14960f9fd /mm/debug.c | |
| parent | 255116c5b0fa2145ede28c2f7b248df5e73834d1 (diff) | |
mm: swap: fix potential buffer overflow in setup_clusters()
In setup_swap_map(), we only ensure badpages are in range (0, last_page].
As maxpages might be < last_page, setup_clusters() will encounter a buffer
overflow when a badpage is >= maxpages.
Only call inc_cluster_info_page() for badpage which is < maxpages to fix
the issue.
Link: https://lkml.kernel.org/r/20250522122554.12209-4-shikemeng@huaweicloud.com
Fixes: b843786b0bd0 ("mm: swapfile: fix SSD detection with swapfile on btrfs")
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/debug.c')
0 files changed, 0 insertions, 0 deletions