Hi,
I can't mount a share as guest using SMB2 or higher when running the
5.0.0 kernel (ubuntu's 5.0.0-7.8 specifically). When I switch to a
4.19.x kernel (4.19.0-12-generic), then it works.
This is the mount command and output:
root@ubuntu:~# mount //localhost/pub /mnt -o guest
mount error(13): Permission denied
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)
The share is a simple one:
[pub]
path = /pub
guest ok = yes
The server logs this:
[2019/03/20 18:24:46.245816, 0]
../../libcli/smb/smb2_signing.c:169(smb2_signing_check_pdu)
Bad SMB2 signature for message
[2019/03/20 18:24:46.245860, 0] ../../lib/util/util.c:508(dump_data)
[0000] 2D 60 1F CA 49 06 92 B0 69 06 60 82 42 39 21 F8 -`..I... i.`.B9!.
[2019/03/20 18:24:46.245894, 0] ../../lib/util/util.c:508(dump_data)
[0000] 75 F8 77 09 63 D5 4A 7B 9F 91 51 93 6D 12 6F 6F u.w.c.J{ ..Q.m.oo
Here is a dmesg output with cifs debugging enabled:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1821053/+attachment/5247960/+files/dmesg.txt
That output was from a kernel running patch
https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-5.0/cifs-do-not-skip-smb2-message-ids-on-send-failures.patch,
just a quick attempt to see if that fixed it, but it didn't.
mount.cifs is version 6.8
Server is samba 4.10.0.
Is this a known issue?
Thanks!
