ksmbd: fix slab-out-of-bounds in smb2_allocate_rsp_buf

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If ->ProtocolId is SMB2_TRANSFORM_PROTO_NUM, smb2 request size
validation could be skipped. if request size is smaller than
sizeof(struct smb2_query_info_req), slab-out-of-bounds read can happen in
smb2_allocate_rsp_buf(). This patch allocate response buffer after
decrypting transform request. smb3_decrypt_req() will validate transform
request size and avoid slab-out-of-bound in smb2_allocate_rsp_buf().

Reported-by: Norbert Szetei <norbert@doyensec.com>
Cc: stable@vger.kernel.org
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

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Namjae Jeon 2024-04-11 23:02:15 +09:00 • committed by Steve French

parent 0bbac3facb

commit c119f4ede3

1 changed files with 5 additions and 8 deletions

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fs/smb/server/server.c

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