Re: [PATCH v5 04/17] arm64: kexec_file: Fix CMA page leaks in segment placement retry loops

During kexec image placement retry loops, any midway failure causes
the loader to truncate `image->nr_segments` back to its initial state
to purge the failed segments.

However, this truncation introduces a memory leak. The CMA pages
allocated via kexec_add_buffer() during the failed attempt are tracked
in the `image->segment_cma` array. Because the subsequent cleanup paths
only iterate up to the truncated `nr_segments` boundary, these allocated
CMA pages outside the new boundary are permanently leaked.

Fix this by explicitly releasing the associated CMA buffers in
the failure paths before `image->nr_segments` is reduced.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Breno Leitao <leitao@debian.org>
Cc: Pratyush Yadav <pratyush@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Yeoreum Yun <redacted>
Cc: Baoquan He <redacted>
Cc: stable@vger.kernel.org
Fixes: 07d24902977e4 ("kexec: enable CMA based contiguous allocation")
Signed-off-by: Jinjie Ruan <redacted>

Sashiko has reviewed this patch and found no issues. It looks great!

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Sashiko AI review · https://sashiko.dev/#/patchset/20260918100442.3841135-1-ruanjinjie@huawei.com?part=4