This is a note to let you know that I've just added the patch titled mm/damon/reclaim: fix potential memory leak in damon_reclaim_init() to the 5.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mm-damon-reclaim-fix-potential-memory-leak-in-damon_.patch and it can be found in the queue-5.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit da88b2e18326479f78988cfb3e313dbb2286e447 Author: Jianglei Nie <niejianglei2021@xxxxxxx> Date: Thu Jul 14 14:37:46 2022 +0800 mm/damon/reclaim: fix potential memory leak in damon_reclaim_init() [ Upstream commit 188043c7f4f2bd662f2a55957d684fffa543e600 ] damon_reclaim_init() allocates a memory chunk for ctx with damon_new_ctx(). When damon_select_ops() fails, ctx is not released, which will lead to a memory leak. We should release the ctx with damon_destroy_ctx() when damon_select_ops() fails to fix the memory leak. Link: https://lkml.kernel.org/r/20220714063746.2343549-1-niejianglei2021@xxxxxxx Fixes: 4d69c3457821 ("mm/damon/reclaim: use damon_select_ops() instead of damon_{v,p}a_set_operations()") Signed-off-by: Jianglei Nie <niejianglei2021@xxxxxxx> Reviewed-by: SeongJae Park <sj@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/mm/damon/reclaim.c b/mm/damon/reclaim.c index e34c4d0c4d93..11982685508e 100644 --- a/mm/damon/reclaim.c +++ b/mm/damon/reclaim.c @@ -384,8 +384,10 @@ static int __init damon_reclaim_init(void) if (!ctx) return -ENOMEM; - if (damon_select_ops(ctx, DAMON_OPS_PADDR)) + if (damon_select_ops(ctx, DAMON_OPS_PADDR)) { + damon_destroy_ctx(ctx); return -EINVAL; + } ctx->callback.after_aggregation = damon_reclaim_after_aggregation;