Public bug reported:
Problem:
Following error logged when mounting Azure file share with CIFS 3.0 protocol.
[ 4856.227895] CIFS VFS: error -22 on ioctl to get interface list
It looks like linux-azure kernel > 5 has some cifs bug. (It might be
reproducible with a upstream kernel as well.)
This is not reproducible with -o 2.1 mount option or linux-azure 4.15.
And It can be easily reproducible with platform image like
Canonical:UbuntuServer:18.04-LTS:18.04.202002180.
What I have done to reproduce:
VM create CLI command
$ az vm create --resource-group rgname --name cifsubuntu --image
Canonical:UbuntuServer:18.04-LTS:18.04.202002180
mount command
# mount -t cifs //accountname.file.core.windows.net/test /mnt/somewhere
-o vers=3.0,credentials=/etc/smbcredentials/cred.cred --verbose
Do you have any knowledge about this?
As far as I research, SMB2_ioctl which is in cifs kernel module send some
invalid parameter to the server.
Here is a debug log.
[ 156.667830] SMB2_ioctl:2506:
/build/linux-azure-ZlnYF6/linux-azure-5.0.0/fs/cifs/smb2pdu.c: SMB2 IOCTL
[ 156.667836] smb3_init_transform_rq:3164:
/build/linux-azure-ZlnYF6/linux-azure-5.0.0/fs/cifs/smb2ops.c: encrypt message
returned 0
[ 156.667840] __smb_send_rqst:341:
/build/linux-azure-ZlnYF6/linux-azure-5.0.0/fs/cifs/transport.c: Sending smb:
smb_len=177
[ 156.668906] cifs_demultiplex_thread:1184:
/build/linux-azure-ZlnYF6/linux-azure-5.0.0/fs/cifs/connect.c: RFC1002 header
0x7d
[ 156.668914] decrypt_raw_data:3205:
/build/linux-azure-ZlnYF6/linux-azure-5.0.0/fs/cifs/smb2ops.c: decrypt message
returned 0
[ 156.668915] receive_encrypted_standard:3533:
/build/linux-azure-ZlnYF6/linux-azure-5.0.0/fs/cifs/smb2ops.c: mid found
[ 156.668916] smb2_calc_size:421:
/build/linux-azure-ZlnYF6/linux-azure-5.0.0/fs/cifs/smb2misc.c: SMB2 data
length 0 offset 0
[ 156.668917] smb2_calc_size:439:
/build/linux-azure-ZlnYF6/linux-azure-5.0.0/fs/cifs/smb2misc.c: SMB2 len 73
[ 156.668918] smb2_add_credits:122:
/build/linux-azure-ZlnYF6/linux-azure-5.0.0/fs/cifs/smb2ops.c: add 2 credits
total=39
[ 156.668924] cifs_sync_mid_result:708:
/build/linux-azure-ZlnYF6/linux-azure-5.0.0/fs/cifs/transport.c:
cifs_sync_mid_result: cmd=11 mid=8 state=4
[ 156.668925] Status code returned 0xc000000d STATUS_INVALID_PARAMETER
[ 156.668929] map_smb2_to_linux_error:2484:
/build/linux-azure-ZlnYF6/linux-azure-5.0.0/fs/cifs/smb2maperror.c: Mapping
SMB2 status code 0xc000000d to POSIX err -22
[ 156.668930] cifs_small_buf_release:222:
/build/linux-azure-ZlnYF6/linux-azure-5.0.0/fs/cifs/misc.c: Null buffer passed
to cifs_small_buf_release
[ 156.668931] CIFS VFS: error -22 on ioctl to get interface list
To enable the debug, I have done following command before mount.
# modprobe cifs
# echo 'module cifs +lfp' > /sys/kernel/debug/dynamic_debug/control
# echo 'file fs/cifs/* +lfp' > /sys/kernel/debug/dynamic_debug/control
# echo 7 > /proc/fs/cifs/cifsFYI
I am not sure but it looks like following SMB2_ioctl has some invalid argument.
"fs/cifs/smb2ops.c"
516 static int
517 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
518 {
519 int rc;
520 unsigned int ret_data_len = 0;
521 struct network_interface_info_ioctl_rsp *out_buf = NULL;
522 struct cifs_server_iface *iface_list;
523 size_t iface_count;
524 struct cifs_ses *ses = tcon->ses;
525
526 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
527 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /*
is_fsctl */,
528 NULL /* no data input */, 0 /* no data input */,
529 (char **)&out_buf, &ret_data_len);
530 if (rc == -EOPNOTSUPP) {
531 cifs_dbg(FYI,
532 "server does not support query network
interfaces\n");
533 goto out;
534 } else if (rc != 0) {
535 cifs_dbg(VFS, "error %d on ioctl to get interface list\n",
rc);
536 goto out;
** Affects: linux-azure (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1864131
Title:
CIFS VFS: error -22 on ioctl to get interface list
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