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ksmbd: return complete resume key response

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The FSCTL_SRV_REQUEST_RESUME_KEY response contains a mandatory
four-byte context field after ContextLength.

Defining the context as a flexible array excludes it from
sizeof(struct resume_key_ioctl_rsp), so ksmbd sends only 28 bytes
instead of the required 32 bytes. The truncated response cannot be
decoded and results in an NDR buffer size error.

Define the reserved context as a fixed four-byte field. This makes the
response size match the wire format and ensures the field is zeroed and
included in OutputCount.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This commit is contained in:
Namjae Jeon 2026-07-07 00:35:18 +09:00
parent d4ef8821fd
commit c1c200924f
1 changed files with 1 additions and 1 deletions
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2
fs/smb/common/smb2pdu.h
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@ -1452,7 +1452,7 @@ struct resume_key_ioctl_rsp {
__u64 ResumeKeyU64[3];
};
__le32 ContextLength; /* MBZ */
char Context[]; /* ignored, Windows sets to 4 bytes of zero */
char Context[4]; /* ignored, Windows sets to 4 bytes of zero */
} __packed;
struct smb2_ioctl_rsp {