Bug 55978 – "zlib.error: Error -3 while decompressing data: invalid code lengths set" during logout with keycloak as IDP

Bug 55978 - "zlib.error: Error -3 while decompressing data: invalid code lengths set" during logout with keycloak as IDP


Summary:	"zlib.error: Error -3 while decompressing data: invalid code lengths set" dur...

Status:	VERIFIED DUPLICATE of bug 43633

Product:	UCS
Classification:	Unclassified
Component:	UMC (Generic)
Version:	UCS 5.0
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	---
Assigned To:	UMC maintainers
QA Contact:	UMC maintainers

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Reported:	2023-04-17 13:39 CEST by Felix Botner
Modified:	2023-06-22 16:02 CEST (History)
CC List:	2 users (show)

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Description Felix Botner

2023-04-17 13:39:03 CEST

If keycloak is used as umc/saml/idp-server, we get this error during logout in management-console-web-server.log.

Traceback (most recent call last):
  File "/usr/sbin/univention-management-console-web-server", line 1305, in slo
    is_logout_request = b'LogoutRequest' in data or b'LogoutRequest' in zlib.decompress(data, -15).split(b'>', 1)[0]
zlib.error: Error -3 while decompressing data: invalid code lengths set

data = b'<samlp:LogoutResponse xmlns...
binding = urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST

Logout seems to work though (logout from portal/UMC ok and keycloak).

Comment 1 Felix Botner

2023-04-17 13:49:01 CEST

Added traceback to ignore list (99_end/grep_traceback.py::COMMON_EXCEPTIONS - 90bb41cd4ed60425273865590d0500370287e3ef)

Please revert if bug is fixed.

Comment 2 Florian Best

2023-06-22 15:42:56 CEST

This was fixed along with Bug #43633.

*** This bug has been marked as a duplicate of bug 43633 ***

Comment 3 Felix Botner

2023-06-22 16:02:28 CEST

OK, works (no traceback in management-console-server.log), i removed the "workaround" in "99_end/grep_traceback.py"