nginx crash

Dk Jack dnj0496 at
Wed Jul 27 15:40:41 UTC 2022

In my code I am not modifying the reference count. Could you let me if there any function calls if invoked would indirectly update the reference count?


> On Jul 27, 2022, at 6:35 AM, Maxim Dounin <mdounin at> wrote:
> ´╗┐Hello!
>> On Tue, Jul 26, 2022 at 07:21:29PM -0700, Dk Jack wrote:
>> Hi,
>> I am noticing a crash in my nginx module. The crash is happening after an
>> internal redirect. It's not always happening but for certain requests.
>> Besides the trace log I do not have much info about the request. In my
>> module, I am restoring the my module context in a similar fashion as the `
>> ngx_http_realip_get_module_ctx`. What I noticed is `r->pool == 0`. Why
>> would the r->pool be ever zero'ed?
>> The crash is happening in my get_module_ctx function which was called
>> immediately after returning from the ngx_http_internal_redirect call. Any
>> ideas on how to go about resolving this is greatly appreciated. Thanks.
> It looks like there are issues with request reference counting 
> somewhere in your code, and the request is freed in the 
> ngx_http_internal_redirect() call.  Review your code logic and 
> corresponding request reference counting, it should help.
> -- 
> Maxim Dounin
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