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ksmbd: override fsids for smb2_query_info()

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Sangsoo reported that a DAC denial error occurred when accessing
files through the ksmbd thread. This patch override fsids for
smb2_query_info().

Reported-by: Sangsoo Lee <constant.lee@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Namjae Jeon 2024-08-05 08:57:03 +09:00 committed by Steve French
parent a018c1b636
commit f6bd41280a
1 changed files with 7 additions and 0 deletions
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7
fs/smb/server/smb2pdu.c
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@ -5596,6 +5596,11 @@ int smb2_query_info(struct ksmbd_work *work)
ksmbd_debug(SMB, "GOT query info request\n");
if (ksmbd_override_fsids(work)) {
rc = -ENOMEM;
goto err_out;
}
switch (req->InfoType) {
case SMB2_O_INFO_FILE:
ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
@ -5614,6 +5619,7 @@ int smb2_query_info(struct ksmbd_work *work)
req->InfoType);
rc = -EOPNOTSUPP;
}
ksmbd_revert_fsids(work);
if (!rc) {
rsp->StructureSize = cpu_to_le16(9);
@ -5623,6 +5629,7 @@ int smb2_query_info(struct ksmbd_work *work)
le32_to_cpu(rsp->OutputBufferLength));
}
err_out:
if (rc < 0) {
if (rc == -EACCES)
rsp->hdr.Status = STATUS_ACCESS_DENIED;