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[GH-ISSUE #131] invalid memory address or nil pointer dereference #4499

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opened 2026-03-01 15:33:45 +03:00 by kerem · 5 comments

kerem commented

2026-03-01 15:33:45 +03:00

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Originally created by @skrilax91 on GitHub (Jun 2, 2023).
Original GitHub issue: https://github.com/0xJacky/nginx-ui/issues/131

Describe the bug
after a fresh install on IONOS ubuntu 22.04 os i get this error on log when i go to the ui :
ERROR router/middleware.go:29 runtime error: invalid memory address or nil pointer dereference
from what i could see this unhandled error happens because something else returns an error, so i know that solving this error will not solve my problem, but it prevents me from having the right message allowing me to understand the real mistake

To Reproduce

Install nginx-ui with quick script
make the recover() function in the middleware file return an error

Expected behavior
A clear and concise description of the error

Screenshots

Info (please complete the following information):

Server OS: Ubuntu 22.04
Server Arch: amd64
Nginx UI Version: 1.9.9-4
Your Browser: Firefox

Originally created by @skrilax91 on GitHub (Jun 2, 2023). Original GitHub issue: https://github.com/0xJacky/nginx-ui/issues/131 **Describe the bug** after a fresh install on IONOS ubuntu 22.04 os i get this error on log when i go to the ui : `ERROR router/middleware.go:29 runtime error: invalid memory address or nil pointer dereference` from what i could see this unhandled error happens because something else returns an error, so i know that solving this error will not solve my problem, but it prevents me from having the right message allowing me to understand the real mistake **To Reproduce** 1. Install nginx-ui with quick script 2. make the recover() function in the middleware file return an error **Expected behavior** A clear and concise description of the error **Screenshots** ![image](https://github.com/0xJacky/nginx-ui/assets/6585219/422ac433-1c9c-494c-9422-d5bf4a6c46cb) **Info (please complete the following information):** - Server OS: Ubuntu 22.04 - Server Arch: amd64 - Nginx UI Version: 1.9.9-4 - Your Browser: Firefox

kerem

2026-03-01 15:33:45 +03:00

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kerem commented

2026-03-01 15:33:46 +03:00

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@0xJacky commented on GitHub (Jun 2, 2023):

Hi, this issue was resolved in v2.0.0 beta. I can explain why it was throwing a runtime error. It was caused by the auto-cert goroutine, which was trying to access the db pointer. However this pointer could be nil until you visit <your_domain>/install to install nginx-ui. Thus, the recovery function will print this error in the console.

In v2.0.0, I have enhanced the recovery function, and now it can be able to print the call stack if a panic occurs.
And also, in v2.0.0 the auto-cert goroutine will not start until you install the nginx-ui via <your_domain>/install.

@0xJacky commented on GitHub (Jun 2, 2023): Hi, this issue was resolved in v2.0.0 beta. I can explain why it was throwing a runtime error. It was caused by the auto-cert goroutine, which was trying to access the db pointer. However this pointer could be nil until you visit `<your_domain>/install` to install nginx-ui. Thus, the recovery function will print this error in the console. In v2.0.0, I have enhanced the recovery function, and now it can be able to print the call stack if a panic occurs. And also, in v2.0.0 the auto-cert goroutine will not start until you install the nginx-ui via `<your_domain>/install`.

kerem commented

2026-03-01 15:33:46 +03:00

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@skrilax91 commented on GitHub (Jun 2, 2023):

Thanks for your answer, the problem is that i am not able to go to x.x.x.x:9000/install, i am always redirect to the dashboard

@skrilax91 commented on GitHub (Jun 2, 2023): Thanks for your answer, the problem is that i am not able to go to x.x.x.x:9000/install, i am always redirect to the dashboard

kerem commented

2026-03-01 15:33:46 +03:00

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@skrilax91 commented on GitHub (Jun 2, 2023):

My bad, i need to go to x.x.x.x:9000/#/install

@skrilax91 commented on GitHub (Jun 2, 2023): My bad, i need to go to x.x.x.x:9000/#/install

kerem commented

2026-03-01 15:33:46 +03:00

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@skrilax91 commented on GitHub (Jun 2, 2023):

It's working now, thanks you for the help !

@skrilax91 commented on GitHub (Jun 2, 2023): It's working now, thanks you for the help !

kerem commented

2026-03-01 15:33:46 +03:00

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@jflad17 commented on GitHub (Oct 20, 2024):

My bad, i need to go to x.x.x.x:9000/#/install

Thank you for this, this solved the issue I mentioned on https://github.com/0xJacky/nginx-ui/issues/612

@jflad17 commented on GitHub (Oct 20, 2024): > My bad, i need to go to x.x.x.x:9000/#/install Thank you for this, this solved the issue I mentioned on https://github.com/0xJacky/nginx-ui/issues/612