Hey all, So I recently updated my kernel and my previously-working CIFS mountpoints are broken. The server hasn't changed. I can successfully access it via smbclient. Only mount.cifs is broken. On the server: % /usr/local/sbin/smbd --version Version 4.12.15 On the client: $ mount.cifs --version mount.cifs version: 6.15 $ smbclient --version Version 4.16.2 $ uname -r 5.18.9-arch1-1 (I know it's not a vanilla kernel, so I wanted to ask for advice here before making a bug report.) As mentioned, smbclient still works: $ smbclient -U brian //192.168.1.131/backup -c ls Password for [WORKGROUP\brian]: . D 0 Sat Apr 24 16:01:23 2021 .. D 0 Tue Dec 1 20:18:28 2020 brian D 0 Sat Apr 24 16:09:46 2021 15119769681 blocks of size 1024. 12418540722 blocks available This doesn't though: # mount.cifs --verbose --verbose -o username=brian //192.168.1.131/backup /tmp/foo Password for brian@//192.168.1.131/backup: mount error(22): Invalid argument Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) and kernel log messages (dmesg) I attached my kernel output. Is there anything there that jumps out at anyone? Any easy fixes or should I look into opening a bug report? Anything else I can provide, just ask. Thanks, Brian
[177628.524701] device enp4s0 entered promiscuous mode [177628.524722] audit: type=1700 audit(1657508205.654:2034): dev=enp4s0 prom=256 old_prom=0 auid=1000 uid=0 gid=0 ses=4 [177628.525000] audit: type=1300 audit(1657508205.654:2034): arch=c000003e syscall=54 success=yes exit=0 a0=4 a1=107 a2=1 a3=7ffccf6d1fd0 items=0 ppid=8236 pid=138099 auid=1000 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts9 ses=4 comm="tcpdump" exe="/usr/bin/tcpdump" key=(null) [177628.525003] audit: type=1327 audit(1657508205.654:2034): proctitle=74637064756D70002D730030002D770074726163652E70636170 [177640.325043] CIFS: fs/cifs/fs_context.c: CIFS: parsing cifs mount option 'source' [177640.325053] CIFS: fs/cifs/fs_context.c: CIFS: parsing cifs mount option 'ip' [177640.325057] CIFS: fs/cifs/fs_context.c: CIFS: parsing cifs mount option 'unc' [177640.325059] CIFS: fs/cifs/fs_context.c: CIFS: parsing cifs mount option 'user' [177640.325061] CIFS: fs/cifs/fs_context.c: CIFS: parsing cifs mount option 'pass' [177640.325064] CIFS: fs/cifs/cifsfs.c: Devname: \\192.168.1.131\backup flags: 0 [177640.325068] CIFS: fs/cifs/connect.c: Username: brian [177640.325070] CIFS: fs/cifs/connect.c: file mode: 0755 dir mode: 0755 [177640.325073] CIFS: fs/cifs/connect.c: VFS: in mount_get_conns as Xid: 72 with uid: 0 [177640.325076] CIFS: fs/cifs/connect.c: UNC: \\192.168.1.131\backup [177640.325080] CIFS: fs/cifs/connect.c: generic_ip_connect: connecting to 192.168.1.131:445 [177640.325090] CIFS: fs/cifs/connect.c: Socket created [177640.325092] CIFS: fs/cifs/connect.c: sndbuf 16384 rcvbuf 131072 rcvtimeo 0x834 [177640.325724] CIFS: fs/cifs/connect.c: cifs_get_tcp_session: next dns resolution scheduled for 600 seconds in the future [177640.325727] CIFS: fs/cifs/connect.c: VFS: in cifs_get_smb_ses as Xid: 73 with uid: 0 [177640.325729] CIFS: fs/cifs/connect.c: Existing smb sess not found [177640.325728] CIFS: fs/cifs/connect.c: Demultiplex PID: 138111 [177640.325732] CIFS: fs/cifs/smb2pdu.c: Negotiate protocol [177640.325738] CIFS: fs/cifs/transport.c: wait_for_free_credits: remove 1 credits total=0 [177640.325750] CIFS: fs/cifs/transport.c: Sending smb: smb_len=244 [177640.339376] CIFS: fs/cifs/connect.c: RFC1002 header 0x49 [177640.339381] CIFS: fs/cifs/smb2misc.c: SMB2 data length 0 offset 0 [177640.339382] CIFS: fs/cifs/smb2misc.c: SMB2 len 73 [177640.339385] CIFS: fs/cifs/smb2ops.c: smb2_add_credits: added 1 credits total=1 [177640.339395] CIFS: fs/cifs/transport.c: cifs_sync_mid_result: cmd=0 mid=0 state=4 [177640.339399] CIFS: fs/cifs/smb2maperror.c: Mapping SMB2 status code 0xc000000d to POSIX err -22 [177640.339403] CIFS: fs/cifs/misc.c: Null buffer passed to cifs_small_buf_release [177640.339406] CIFS: fs/cifs/connect.c: VFS: leaving cifs_get_smb_ses (xid = 73) rc = -22 [177640.339409] CIFS: fs/cifs/dfs_cache.c: cache_refresh_path: search path: \192.168.1.131\backup [177640.339411] CIFS: fs/cifs/dfs_cache.c: get_dfs_referral: get an DFS referral for \192.168.1.131\backup [177640.339417] CIFS: fs/cifs/connect.c: VFS: leaving mount_put_conns (xid = 72) rc = 0 [177640.339418] CIFS: VFS: cifs_mount failed w/return code = -22 [177647.747321] device enp4s0 left promiscuous mode [177647.747339] audit: type=1700 audit(1657508224.877:2035): dev=enp4s0 prom=0 old_prom=256 auid=1000 uid=0 gid=0 ses=4
