ntfs: fix resource leak in ntfs_new_attr_flags

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When handling resident attributes that don't need sparse/compressed
changes, ntfs_new_attr_flags() returns 0 directly at line 678 without
calling unmap_mft_record() or ntfs_attr_put_search_ctx(). This leaks
the MFT record mapping and attribute search context.

An unprivileged user can cause a denial of service by repeatedly
calling setxattr(2) with system.ntfs_attrib on files with resident
attributes, eventually exhausting kernel memory.

Fix by replacing the direct return with goto err_out to ensure proper
cleanup of resources via the existing cleanup code.

Fixes: e791930240a5 ("ntfs: fix resident conversion in ntfs_new_attr_flags")
Cc: stable@vger.kernel.org
Signed-off-by: Hongling Zeng <zenghongling@kylinos.cn>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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Hongling Zeng 2026-08-20 16:14:10 +08:00 • committed by Namjae Jeon

parent 8168434096

commit 9969d58a9b

1 changed files with 4 additions and 2 deletions

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fs/ntfs/ea.c

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