ksmbd: return buffer overflow for partial filesystem info

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The query-info buffer check returns STATUS_INFO_LENGTH_MISMATCH for
every output buffer smaller than the complete response. Variable-length
filesystem information instead requires STATUS_BUFFER_OVERFLOW when the
fixed portion fits but the complete data does not.

Pass the fixed size for each filesystem information class to the buffer
checker. Keep INFO_LENGTH_MISMATCH for buffers below that size, and
return BUFFER_OVERFLOW with a response truncated to the requested length
for larger partial buffers.

This fixes smb2.getinfo.qfs_buffercheck.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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Namjae Jeon 2026-07-05 22:43:46 +09:00

parent 8184c425a1

commit 0ecd35fac4

1 changed files with 25 additions and 1 deletions

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fs/smb/server/smb2pdu.c

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