From owner-freebsd-bugs@freebsd.org Tue Jul 31 02:02:42 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 E3E46106A844 for ; Tue, 31 Jul 2018 02:02:41 +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 6047B73F02 for ; Tue, 31 Jul 2018 02:02:41 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 24809106A841; Tue, 31 Jul 2018 02:02:41 +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 02801106A840 for ; Tue, 31 Jul 2018 02:02:41 +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 8BA9573F01 for ; Tue, 31 Jul 2018 02:02:40 +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 D873692F6 for ; Tue, 31 Jul 2018 02:02:39 +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 w6V22dvZ085264 for ; Tue, 31 Jul 2018 02:02:39 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w6V22d50085263 for bugs@FreeBSD.org; Tue, 31 Jul 2018 02:02:39 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 230220] UFS: the freezing ioctl (i.e.UFSSUSPEND) causes panic or EBUSY Date: Tue, 31 Jul 2018 02:02:39 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new 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 Some People X-Bugzilla-Who: decui@microsoft.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: 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, 31 Jul 2018 02:02:42 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D230220 Bug ID: 230220 Summary: UFS: the freezing ioctl (i.e.UFSSUSPEND) causes panic or EBUSY Product: Base System Version: CURRENT Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: decui@microsoft.com I'm running a FreeBSD VM with "the latest 12-CURRENT code + the default sys/amd64/conf/GENERIC" on Hyper-V. I can reproduce the panic issue every t= ime with the test program test-freeze-thaw.c, which will be attached shortly. The test program is a simplified version of the file contrib/hyperv/tools/hv_vss_daemon.c (https://github.com/freebsd/freebsd/blob/master/contrib/hyperv/tools/hv_vss= _daemon.c). [root@decui-b12 ~]# gpart show =3D> 63 104857537 da0 MBR (50G) 63 1 - free - (512B) 64 104857536 1 freebsd [active] (50G) =3D> 0 104857536 da0s1 BSD (50G) 0 98566144 1 freebsd-ufs (47G) 98566144 5242880 2 freebsd-swap (2.5G) 103809024 1048512 - free - (512M) =3D> 63 266338241 da1 MBR (127G) 63 1985 - free - (993K) 2048 266334208 1 freebsd (127G) 266336256 2048 - free - (1.0M) =3D> 40 104857520 da2 GPT (50G) 40 2008 - free - (1.0M) 2048 41943040 1 freebsd-ufs (20G) 41945088 62912472 - free - (30G) [root@decui-b12 ~]# mount /dev/da0s1a on / (ufs, local, journaled soft-updates) devfs on /dev (devfs, local, multilabel) /dev/da2p1 on /mnt (ufs, local, soft-updates) [root@decui-b12 ~]# ./test-freeze-thaw Now the kernel panics immediately:=20 ogin: panic: devfs_set_cdevpriv failed cpuid =3D 11 time =3D 1532998033 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0034027= 560 vpanic() at vpanic+0x1a3/frame 0xfffffe00340275c0 doadump() at doadump/frame 0xfffffe0034027640 ffs_susp_ioctl() at ffs_susp_ioctl+0x223/frame 0xfffffe00340276a0 devfs_ioctl() at devfs_ioctl+0xcb/frame 0xfffffe00340276f0 VOP_IOCTL_APV() at VOP_IOCTL_APV+0xd9/frame 0xfffffe0034027720 vn_ioctl() at vn_ioctl+0x124/frame 0xfffffe0034027830 devfs_ioctl_f() at devfs_ioctl_f+0x1f/frame 0xfffffe0034027850 kern_ioctl() at kern_ioctl+0x2b9/frame 0xfffffe00340278b0 sys_ioctl() at sys_ioctl+0x15e/frame 0xfffffe0034027980 amd64_syscall() at amd64_syscall+0x281/frame 0xfffffe0034027ab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0034027ab0 --- syscall (54, FreeBSD ELF64, sys_ioctl), rip =3D 0x800413e0a, rsp =3D 0x7fffffffea98, rbp =3D=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 0x7fffffffeaf0 --- KDB: enter: panic [ thread pid 1262 tid 100280 ] Stopped at kdb_enter+0x3b: movq $0,kdb_why --=20 You are receiving this mail because: You are the assignee for the bug.=