Date: Wed, 30 Aug 2017 14:08:31 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 219935] Kernel panic in getnewvnode (possibly ZFS related) Message-ID: <bug-219935-8-0yJIyj08VN@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-219935-8@https.bugs.freebsd.org/bugzilla/> References: <bug-219935-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D219935 --- Comment #10 from Raimo Niskanen <raimo+freebsd@erix.ericsson.se> --- Lo and behold! With the following patch: =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --- sys/kern/vfs_subr.c (revision 322570) +++ sys/kern/vfs_subr.c (working copy) @@ -2449,6 +2449,9 @@ vholdl(struct vnode *vp) ASSERT_VI_LOCKED(vp, "vholdl"); #endif vp->v_holdcnt++; + if (vp->v_holdcnt =3D=3D 1 && vp->v_type =3D=3D VBAD) + panic("vhold: reclaimed vnode"); + if ((vp->v_iflag & VI_FREE) =3D=3D 0) return; VNASSERT(vp->v_holdcnt =3D=3D 1, vp, ("vholdl: wrong hold count")); I got this panic: =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D sasquatch.otp.ericsson.se dumped core - see /var/crash/vmcore.3 Wed Aug 30 07:18:08 CEST 2017 FreeBSD sasquatch.otp.ericsson.se 10.3-RELEASE-p21 FreeBSD 10.3-RELEASE-p21= #0: Mon Aug 28 11:05:53 CEST 2017=20=20=20=20 root@sasquatch.otp.ericsson.se:/usr/obj/usr/src/sys/DEBUG amd64 panic: vhold: reclaimed vnode GNU gdb 6.1.1 [FreeBSD] Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain condition= s. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "amd64-marcel-freebsd"... Unread portion of the kernel message buffer: panic: vhold: reclaimed vnode cpuid =3D 1 KDB: stack backtrace: #0 0xffffffff8098e810 at kdb_backtrace+0x60 #1 0xffffffff809514e6 at vpanic+0x126 #2 0xffffffff809513b3 at panic+0x43 #3 0xffffffff809f77e5 at vholdl+0x145 #4 0xffffffff809f0f40 at dounmount+0x60 #5 0xffffffff81a6dfe4 at zfs_unmount_snap+0x114 #6 0xffffffff81a10663 at dsl_dataset_user_release_impl+0x103 #7 0xffffffff81a10f2c at dsl_dataset_user_release_onexit+0x5c #8 0xffffffff81a79fb6 at zfs_onexit_destroy+0x56 #9 0xffffffff81a70072 at zfsdev_close+0x52 #10 0xffffffff80833e19 at devfs_fpdrop+0xa9 #11 0xffffffff80836585 at devfs_close_f+0x45 #12 0xffffffff80905fa9 at _fdrop+0x29 #13 0xffffffff8090884e at closef+0x21e #14 0xffffffff80906358 at closefp+0x98 #15 0xffffffff80d56e9f at amd64_syscall+0x40f #16 0xffffffff80d3c0fb at Xfast_syscall+0xfb Uptime: 1d19h20m50s --=20 You are receiving this mail because: You are the assignee for the bug.=
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