Hi Suhrud,
Below patches should fix this issue.
https://review.gerrithub.io/c/ffilz/nfs-ganesha/+/424260
https://review.gerrithub.io/c/ffilz/nfs-ganesha/+/423882

On Tue, Nov 27, 2018 at 4:18 PM Suhrud Patankar <suhrudpatankar@gmail.com> wrote:
Hello All,

Ganesha: V2.5.0.4
Windows client: Windows 10 Pro

Testing NFSv3 access from windows client. Sometimes Ganesha crashes in
dec_nlm_state_ref.

My understanding of the issue is -
state is maintained in multiple lists but a single ref is taken for all entries.
state mutex is not held while adding/removing it from different lists.
this can cause incorrect ref on the state object.

Attached patch appears to fix this. However I still need to test more.
Any comments on the issue and patch will be highly appreciated.

Thanks & Regards,
Suhrud
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--
with regards,
Sachin Punadikar