dma-pool: fix page leak in atomic_pool_expand() cleanup

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atomic_pool_expand() frees the allocated pages from the remove_mapping
error path only when CONFIG_DMA_DIRECT_REMAP is enabled.

When CONFIG_DMA_DIRECT_REMAP is disabled, failures after page allocation,
such as gen_pool_add_virt(), jump to remove_mapping and return without
freeing the pages.

Move __free_pages(page, order) out of the CONFIG_DMA_DIRECT_REMAP block so
that cleanup paths always release the allocation.

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Michael Kelley <mhklinux@outlook.com>
Tested-by: Mostafa Saleh <smostafa@google.com>
Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Link: https://lore.kernel.org/r/20260717180442.110954-3-aneesh.kumar@kernel.org
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

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Aneesh Kumar K.V (Arm) 2026-07-17 23:34:20 +05:30 • committed by Marek Szyprowski

parent 94a04ad732

commit 0510cb5b23

1 changed files with 7 additions and 3 deletions

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kernel/dma/pool.c

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