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mm: memfd_luo: restore and free memfd_luo_ser on failure

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memfd_luo_ser has the serialization metadata.  It is of no use once
restoration fails.  Free it on failure.

Link: https://lkml.kernel.org/r/20260122151842.4069702-4-pratyush@kernel.org
Fixes: b3749f174d ("mm: memfd_luo: allow preserving memfd")
Signed-off-by: Pratyush Yadav (Google) <pratyush@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Pratyush Yadav (Google)
2026-01-22 16:18:41 +01:00
committed by Andrew Morton
parent 02e117b8ca
commit c657c5dc13
1 changed files with 4 additions and 2 deletions
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6
mm/memfd_luo.c
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@@ -447,7 +447,8 @@ static int memfd_luo_retrieve(struct liveupdate_file_op_args *args)
file = memfd_alloc_file("", 0);
if (IS_ERR(file)) {
pr_err("failed to setup file: %pe\n", file);
return PTR_ERR(file);
err = PTR_ERR(file);
goto free_ser;
}
vfs_setpos(file, ser->pos, MAX_LFS_FILESIZE);
@@ -473,7 +474,8 @@ static int memfd_luo_retrieve(struct liveupdate_file_op_args *args)
put_file:
fput(file);
free_ser:
kho_restore_free(ser);
return err;
}