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smb: client: use unaligned reads in parse_posix_ctxt()

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The server controls create-context DataOffset, so the POSIX context data
pointer may be misaligned on strict-alignment architectures. Use
get_unaligned_le32() when reading nlink, reparse_tag, and mode.

Fixes: 69dda3059e ("cifs: add SMB2_open() arg to return POSIX data")
Cc: stable@vger.kernel.org
Signed-off-by: Zihan Xi <xizh2024@lzu.edu.cn>
Signed-off-by: Ren Wei <n05ec@lzu.edu.cn>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Zihan Xi 2026-07-01 18:23:21 +08:00 committed by Steve French
parent 7ad2bcf244
commit b86467cd26
1 changed files with 3 additions and 3 deletions
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6
fs/smb/client/smb2pdu.c
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@ -2396,9 +2396,9 @@ parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info,
memset(posix, 0, sizeof(*posix));
posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0));
posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4));
posix->mode = le32_to_cpu(*(__le32 *)(beg + 8));
posix->nlink = get_unaligned_le32(beg);
posix->reparse_tag = get_unaligned_le32(beg + 4);
posix->mode = get_unaligned_le32(beg + 8);
sid = beg + 12;
sid_len = posix_info_sid_size(sid, end);