From nobody Wed Feb 25 01:18:29 2026 X-Original-To: bugs@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4fLGts4gjWz6TTRX for ; Wed, 25 Feb 2026 01:18:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R12" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4fLGts3tS1z3TdD for ; Wed, 25 Feb 2026 01:18:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1771982309; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=FyckLZxnVdaLAFNvD9+1n0UJ4mf3nxtmWoSKMF6h/vI=; b=B6zQAvwuzPLZ6Se1DSsFH5nf6Zj1y754YtkQnSUB0kL0ZDI/DJpuhVpah4cxpj+b5K8xmO EFVglui50Pxy1pjbx1IYogy0cptI7IZ2gIb8XVTmDq9Pq7t1oKPNWh3NNqzyYiEBuAvzbG 2dMA25xGSR2rOMONVlwUee5mFjIWFbpnbH1Nq4bLQo031ypA8jwZaDhijkaB4UwoTLRuL8 oSDL/CVjok3iurvIcBTyJ2HFcnnRXZQax5VDG6lbebkrQUrjkYsaZNOPi7hMQmFCuy7NB9 nQ/EqhDAfLUUnpdYaNowhjPCbJdixLk0SUuqVNnpHEjTt1URYzQ2ncgsIkVizA== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1771982309; a=rsa-sha256; cv=none; b=eJrWDmX2k0wplq32yyCpeasbGvejwMPycfV/RFlZBiLR9RNX7NmlHE75Ck1BWLKm29ov7P jcGnwXqQOfClQ2Jaq0niwkqqQcuNgwJGOcMGfSXYWL6FkYr3jyOaLgknN4NxP7ohsvtkZa i9K8J3YK/eKeqEp/BV3GSse9vr0bAJnILrM9kMkJJ0Hl7RFx7HXZ0dJxbdUD7JNuwLzLjs RhbfDDXDq3tH6QLQkIdQgBKHLsoP1n06MMqD9Tn5t+YVyDBwpkxIuQM4cheGSA/HJh9gi1 qgG1RPhk6fGPEux9KisvJcBbTgROQgCVG+2WBucPZcDYbpASGqM0Uzmd0b7EWA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1771982309; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=FyckLZxnVdaLAFNvD9+1n0UJ4mf3nxtmWoSKMF6h/vI=; b=x5014BPe1FS7qyxsPDy/LOnc+PmpWCpH2gREVXmxwW5O4yH7BZIx/UUPyqHfRhnMtGblER 4K8w5h89gZ/c6ZmqZeJR45oDMzt26BxjVAYGDlks7gu31WsGtELWI4ccnjvHTIyS6h/Xov Tps2j5P9i8uYak5RxIII0VvPGD1CFarb6aCarYnYsbPJXBBtaoJASdmrCwgaBA0HLNs4sA 4tIV9q5gKPpbIE2ma1HQ658VUcOAFGjL6hYe3obxR/GtKjKAkvYEXUjQZMkvVJRQS0R+mU 8lIPJGiqtG8uPYOzuJdsK/7a3UcPL4i4vIT+lc8X7sKUKk/jCu+gt9Hza2LPxQ== Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4fLGts2xz1zg4Q for ; Wed, 25 Feb 2026 01:18:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 61P1ITOd052216 for ; Wed, 25 Feb 2026 01:18:29 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 61P1ITT5052215 for bugs@FreeBSD.org; Wed, 25 Feb 2026 01:18:29 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 293127] Kernel panic __mtx_lock_sleep due to nfsd? Date: Wed, 25 Feb 2026 01:18:29 +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: 15.0-STABLE X-Bugzilla-Keywords: crash X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: markj@FreeBSD.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D293127 --- Comment #14 from Mark Johnston --- (In reply to yuan.mei from comment #13) oh, interesting. Is the a stack trace? An nfsd thread faulted on 0xdeadc0de, which implies a use-after-free somewh= ere. If you're willing to try it, you could test a GENERIC-KASAN kernel, that should help catch the UAF as it happens. Note that such kernels are quite slow, and aren't very well-tested on hardware, so you might run into unrela= ted problems. --=20 You are receiving this mail because: You are the assignee for the bug.=