Processing error due to invalid IP but an IP is shown in the event information

[rodolfoBee]

Environment

SaaS (https://sentry.io/)

Steps to Reproduce

1. Configure the Python SDK in a Django project with eventScrubber:

entry_sdk.init(
    dsn="...", 
    send_default_pii=True,
    event_scrubber=EventScrubber()
)

2. Add user IP via set_user, it can also be added by the SDK via send_default_pii=True,
3. Disable the option "Prevent storing IP address" in the project settings
4. Sent a test error event

Expected Result

The UI shows the user IP as [Filtered].

Actual Result

The UI shows an error due to invalid IP but the event has a valid IP address:

The error is showing because the IP received by the server is invalid(from the event's JSON):

ip_address": {
"": {
"rem": [
[
"!config",
"s"
]
],
"err": [
[
"invalid_data",
{
"reason": "expected an ip address"
}
]
],
"val": "[Filtered]"
}
}

However, the server also infers the IP address for the event based on the HTTP request sending the event:

"user": {
"ip_address": "127.0.0.1",
"sentry_user": "ip:127.0.0.1"
},

This is what it seems to happen:

1. An IP address is added via set_user or default_PII true
2. The SDK's event scrubber removes it and replaces with [Filtered]
3. The server sees the ip address value as Filtered and mark it as an invalid field in the event
4. The server infers the IP address from the HTTP request and add it to the user info
5. The UI shows an error (step 3), but also an IP address (Step4).

Product Area

Ingestion and Filtering

Link

https://dev-curumas.sentry.io/issues/7343757920/events/8184ab9875ca46aeafac1a9a53e16f0d/

DSN

No response

Version

No response

[linear-code]

ENG-7092

PY-2147

PY-2148

[getsantry]

Assigning to @getsentry/support for routing ⏲️

[getsantry]

Routing to @getsentry/product-owners-ingestion-and-filtering for triage ⏲️

[jjbayer]

The SDK should not set the IP address at all in this case, because it is a protocol violation.