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authorSteve French <stfrench@microsoft.com>2019-03-13 10:40:07 +0300
committerSteve French <stfrench@microsoft.com>2019-03-15 03:32:36 +0300
commit31ba4331d571f501fb32ae072478787e77baf52a (patch)
tree19767fc3d3b0ae4ccb5245b3121d9dec3e585f39 /fs
parent779ede040dd491acdb076ed9660d7160228949fd (diff)
downloadlinux-31ba4331d571f501fb32ae072478787e77baf52a.tar.xz
SMB3: passthru query info doesn't check for SMB3 FSCTL passthru
The passthrough queries from user space tools like smbinfo can be either SMB3 QUERY_INFO or SMB3 FSCTL, but we are not checking for the latter. Temporarily we return EOPNOTSUPP for SMB3 FSCTL passthrough requests but once compounding fsctls is fixed can enable. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/cifs_ioctl.h3
-rw-r--r--fs/cifs/smb2ops.c26
2 files changed, 22 insertions, 7 deletions
diff --git a/fs/cifs/cifs_ioctl.h b/fs/cifs/cifs_ioctl.h
index d8bce2f862de..086ddc5108af 100644
--- a/fs/cifs/cifs_ioctl.h
+++ b/fs/cifs/cifs_ioctl.h
@@ -43,6 +43,9 @@ struct smb_snapshot_array {
/* snapshots[]; */
} __packed;
+/* query_info flags */
+#define PASSTHRU_QUERY_INFO 0x00000000
+#define PASSTHRU_FSCTL 0x00000001
struct smb_query_info {
__u32 info_type;
__u32 file_info_class;
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 823a58550dfd..32dde87feaa9 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1390,15 +1390,27 @@ smb2_ioctl_query_info(const unsigned int xid,
smb2_set_next_command(tcon, &rqst[0]);
/* Query */
- memset(&qi_iov, 0, sizeof(qi_iov));
- rqst[1].rq_iov = qi_iov;
- rqst[1].rq_nvec = 1;
-
- rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
- qi.file_info_class, qi.info_type,
- qi.additional_information,
+ if (qi.flags & PASSTHRU_FSCTL) {
+ /* Can eventually relax perm check since server enforces too */
+ if (!capable(CAP_SYS_ADMIN))
+ rc = -EPERM;
+ else /* TBD: Add code to compound FSCTL */
+ rc = -EOPNOTSUPP;
+ } else if (qi.flags == PASSTHRU_QUERY_INFO) {
+ memset(&qi_iov, 0, sizeof(qi_iov));
+ rqst[1].rq_iov = qi_iov;
+ rqst[1].rq_nvec = 1;
+
+ rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
+ COMPOUND_FID, qi.file_info_class,
+ qi.info_type, qi.additional_information,
qi.input_buffer_length,
qi.output_buffer_length, buffer);
+ } else { /* unknown flags */
+ cifs_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
+ rc = -EINVAL;
+ }
+
if (rc)
goto iqinf_exit;
smb2_set_next_command(tcon, &rqst[1]);