From owner-freebsd-bugs@freebsd.org Tue Jul 10 21:57:23 2018 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id EE8571031339 for ; Tue, 10 Jul 2018 21:57:22 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 825478E3AE for ; Tue, 10 Jul 2018 21:57:22 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 3DD3C1031335; Tue, 10 Jul 2018 21:57:22 +0000 (UTC) Delivered-To: bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 29C781031334 for ; Tue, 10 Jul 2018 21:57:22 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id B517D8E3A8 for ; Tue, 10 Jul 2018 21:57:21 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 0F6921384B for ; Tue, 10 Jul 2018 21:57:21 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id w6ALvKHK034730 for ; Tue, 10 Jul 2018 21:57:20 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w6ALvKlA034728 for bugs@FreeBSD.org; Tue, 10 Jul 2018 21:57:20 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 228444] "exa-0.8.0" panics the kernel while auditd(8) is running and audit_mask is set as "pc" Date: Tue, 10 Jul 2018 21:57:19 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: asomers@FreeBSD.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: asomers@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: assigned_to bug_status Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Jul 2018 21:57:23 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D228444 Alan Somers changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|bugs@FreeBSD.org |asomers@FreeBSD.org Status|New |Open --- Comment #3 from Alan Somers --- I reproduced this bug in a different way. Simply doing a kernel build while "pc" is in the audit mask and auditd is running will do it. I also found t= he root cause: 1) kern_thr_exit locks the process's spin lock with PROC_SLOCK(p) 2) thread_exit() calls AUDIT_SYSCALL_EXIT while the spin lock is still held 3) a few stack frames later, au_event_class tries to lock a rwlock with EVCLASS_RLOCK. However, witness forbids grabbing an rwlock while holding a spin lock. The likeliest solution is to fix thread_exit so that AUDIT_SYSCALL_EXIT isn= 't called with the spin lock held. --=20 You are receiving this mail because: You are the assignee for the bug.=