From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6A95F8F5B for ; Wed, 11 Jun 2025 05:00:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749618023; cv=none; b=TvymP3244nN7jqHlFnz/Z49+0oHam4kYPwnRsKZVFzBxUMyYaqTLCHdmeSe12zbxtDQ3twm7VIHEcjVxedIGqHTzh7RSQHYxHXSNgcS32fYFipk21KtBvKDj3nY7Qh4ddvfHFKl5mdQDfrICgIiRbPVNDuaEKMspI/dBTu790qE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749618023; c=relaxed/simple; bh=qYGYqF9Cz6m7XirxtBhGfPA5BcE0G1iXrMWDxWUx320=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=fP6nrQUwmoPNexCZ5R6bKeKvNCDEuxsVQQF/0nOQbvgiBZklTBE8UIo1OrqJ9T3y2ZxtYDRIgvbSTRGRwRYlKv9V5D1uBsVPoIHk19MnzTEAyL2d0TOxrlblJ+GY2kxy27agBYTv5fb6gHBIy0lOi1Ou7RvcRXBSWGiipfxZ6qQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cghMkPUr; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="cghMkPUr" Received: by smtp.kernel.org (Postfix) with ESMTPS id 37A03C4CEF2 for ; Wed, 11 Jun 2025 05:00:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1749618023; bh=qYGYqF9Cz6m7XirxtBhGfPA5BcE0G1iXrMWDxWUx320=; h=From:To:Subject:Date:In-Reply-To:References:From; b=cghMkPUroYxM835qCb9u40zmFPz6BeX/PKpEqyuHhUglEJ6+YArWzQbh18aIUmngH GtJCvyTIxN06dkbOS8BB2oATipOxkGr8fyse+grRQMjsp5MkOHE0v6pkj4uWdK8Mp2 mJwvXhhv7Q7xb3LEW7LVO7cD1h1RD6RxVQJ4j0pCPWwj30z7ZsnEG3o8PjO/qF1aB7 cMPY0jN/yoDIK3ygvlmcAYYrJn88zILFIqdVYx4SuT06ytL3f4wHG3A4udaTSj9Qxd 6/9KZbAxQes2cDZin4C1uc81Lk89HG+DnE/beZLzpelDUYr9QWn/UNvpZ3zPxiD/Yx O2QDzqJetNCuw== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 2B8A1C53BC5; Wed, 11 Jun 2025 05:00:23 +0000 (UTC) From: bugzilla-daemon@kernel.org To: kvm@vger.kernel.org Subject: [Bug 220200] Kernel crash with WARNING: CPU: 17 PID: 4510 at lib/refcount.c:28 refcount_warn_saturate+0xd8/0xe0 Date: Wed, 11 Jun 2025 05:00:22 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Product: Virtualization X-Bugzilla-Component: kvm X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: high X-Bugzilla-Who: gs.thiruus@gmail.com X-Bugzilla-Status: REOPENED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D220200 --- Comment #3 from gs.thiruus@gmail.com --- Thank you for suggesting to try kernel version 5.4.294. Could you please provide more details about the specific kernel code changes or fixes in this version that address the crash we observed in our setup? Based on our analysis of the call trace, which points to a NULL pointer dereference in ipv6_sock_mc_close, the issue seems to stem from a prior use-after-free scenario where the kernel attempts to operate on a freed obj= ect. We would greatly appreciate if you could share additional insights or detai= ls that would help us understand how upgrading to version 5.4.294 might resolve this issue. Thank you for your support. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=