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SeongJae Park
ab04340b5a
DAMON_LRU_SORT allocates the damon_ctx object for its kdamond in its init
function. damon_lru_sort_enabled_store() wrongly assumes the allocation
will always succeed once tried. If the damon_ctx allocation was failed,
therefore, code execution reaches to damon_commit_ctx() while 'ctx' is
NULL. As a result, it dereferences the NULL 'ctx' pointer. Avoid the
NULL dereference by returning -ENOMEM if 'ctx' is NULL.
Link: https://lore.kernel.org/[email protected]
Fixes: c4a8e662c8 ("mm/damon/lru_sort: use damon_initialized()")
Signed-off-by: SeongJae Park <[email protected]>
Cc: <[email protected]> # 6.18.x
Signed-off-by: Andrew Morton <[email protected]>