[Samba] Filelocking Issue in 4.18.11

Stolte, Felix f.stolte at fz-juelich.de
Thu Apr 18 06:33:41 UTC 2024


Hi folks,

we are running a clustered Samba Fileserver using CTDB with two public IPs. We observed the following (mis) behavior: 

If user A with write permissions opens an excel file via public ip A and User B opens the same file via public ip B, both users get a Deny-Write lock on the same file and overwrite each others changes:

0:3693691    145522     DENY_WRITE 0x12019f    RDWR       LEASE(RWH)       /srv/test   test.xlsx   Thu Apr 18 08:23:38 2024
1:3437621    0          DENY_WRITE 0x12019f    RDWR       LEASE(RWH)       /srv/test   test.xlsx   Thu Apr 18 08:19:33 2024

Is this a bug or maybe a misconfiguration? In the latter, which parameters could cause this?


We are using sernet packages 4.18.11 on ubuntu 22.04  kernel 5.15.0-102

Best regards
Felix

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