ksmbd: fix a missing return value check bug

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[ Upstream commit 4c16e1cadc ]

In the smb2_send_interim_resp(), if ksmbd_alloc_work_struct()
fails to allocate a node, it returns a NULL pointer to the
in_work pointer. This can lead to an illegal memory write of
in_work->response_buf when allocate_interim_rsp_buf() attempts
to perform a kzalloc() on it.

To address this issue, incorporating a check for the return
value of ksmbd_alloc_work_struct() ensures that the function
returns immediately upon allocation failure, thereby preventing
the aforementioned illegal memory access.

Fixes: 041bba4414 ("ksmbd: fix wrong interim response on compound")
Signed-off-by: Wentao Liang <liangwentao@iscas.ac.cn>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Wentao Liang 2024-12-23 23:30:50 +08:00 • committed by Greg Kroah-Hartman

parent 5b195e6f8b

commit 271ae0edbf

1 changed files with 3 additions and 0 deletions

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fs/smb/server/smb2pdu.c

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