From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 25299 invoked by alias); 29 Aug 2018 12:59:33 -0000 Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org Received: (qmail 25157 invoked by uid 48); 29 Aug 2018 12:59:23 -0000 From: "mark at klomp dot org" To: systemtap@sourceware.org Subject: [Bug testsuite/23493] Test suite makes all CPU stuck forever on kernel 4.16.16 (Fedora 27) Date: Wed, 29 Aug 2018 12:59:00 -0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: systemtap X-Bugzilla-Component: testsuite X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mark at klomp dot org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: systemtap at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2018-q3/txt/msg00143.txt.bz2 https://sourceware.org/bugzilla/show_bug.cgi?id=3D23493 Mark Wielaard changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mark at klomp dot org --- Comment #9 from Mark Wielaard --- (In reply to agentzh from comment #8) > Is it a bug in the stap runtime or in the kernel? It looks like this is caused by calling the kernel find_get_pid () function from the pid2task tapset function when in kernel mode, just after the curre= nt task died? I am not sure find_get_pid should/can be called from a kernel context. It might assume the current pid actually exists? Maybe current is = NULL at this point and we should check for that first? Do you have more context about which probe was hit when this happened? --=20 You are receiving this mail because: You are the assignee for the bug.