tools/mm/page_owner_sort: bound pattern output copies

search_pattern() copies a regex capture into caller-provided buffers
without knowing their sizes.  Several callers pass fixed-size buffers,
including FIELD_BUFF and TASK_COMM_LEN.

Pass the destination size to search_pattern(), reject captures that do not
fit before copying them, and terminate the output string inside
search_pattern().

Link: https://lore.kernel.org/20260629014316.130307-4-chenyichong@uniontech.com
Signed-off-by: Yichong Chen <chenyichong@uniontech.com>
Cc: Vishal Moola <vishal.moola@gmail.com>
Cc: Ye Liu <ye.liu@linux.dev>
Cc: Zhen Ni <zhen.ni@easystack.cn>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

0 files changed, 0 insertions, 0 deletions