ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea()

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commit 79ed288cef upstream.

There are multiple smb2_ea_info buffers in FILE_FULL_EA_INFORMATION request
from client. ksmbd find next smb2_ea_info using ->NextEntryOffset of
current smb2_ea_info. ksmbd need to validate buffer length Before
accessing the next ea. ksmbd should check buffer length using buf_len,
not next variable. next is the start offset of current ea that got from
previous ea.

Cc: stable@vger.kernel.org
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-21598
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Namjae Jeon 2023-08-06 08:44:17 +09:00 • committed by Greg Kroah-Hartman

parent ff7236b66d

commit 4bf629262f

1 changed files with 8 additions and 1 deletions

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fs/smb/server/smb2pdu.c

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