Date: Mon, 28 Jun 2021 09:44:24 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 256868] lock order reversal in vfs_mount when mounting ZFS based jail Message-ID: <bug-256868-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D256868 Bug ID: 256868 Summary: lock order reversal in vfs_mount when mounting ZFS based jail Product: Base System Version: CURRENT Hardware: arm64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: pr@aoek.com Hi, I can reproduce under aarch64 a bug that possibly has been around for quite some time and reported as amd64: please check #142878 #128633 or #210906 am= ong (possibly) others. lock order reversal: 1st 0xffffa00035320af0 zfs (zfs, lockmgr) @ /usr/src/sys/kern/vfs_mount.c:= 1108 2nd 0xffffa0201564ecb0 devfs (devfs, lockmgr) @ /usr/src/sys/kern/vfs_mount.c:1120 lock order devfs -> zfs established at: #0 0xffff0000004dd774 at witness_checkorder+0x438 #1 0xffff000000441b4c at lockmgr_xlock+0x50 #2 0xffff00000056a9d4 at _vn_lock+0x54 #3 0xffff00000054b440 at vfs_domount+0xd74 #4 0xffff000000549480 at vfs_donmount+0x2b8 #5 0xffff00000054def8 at kernel_mount+0x4c #6 0xffff000000550610 at parse_mount+0x49c #7 0xffff00000054eea8 at vfs_mountroot+0x6d4 #8 0xffff0000003fd668 at start_init+0x24 #9 0xffff00000042a344 at fork_exit+0x74 #10 0xffff00000076f7bc at fork_trampoline+0x14 lock order zfs -> devfs attempted at: #0 0xffff0000004ddf48 at witness_checkorder+0xc0c #1 0xffff000000441b4c at lockmgr_xlock+0x50 #2 0xffff00000056a9d4 at _vn_lock+0x54 #3 0xffff00000054b440 at vfs_domount+0xd74 #4 0xffff000000549480 at vfs_donmount+0x2b8 #5 0xffff000000549188 at sys_nmount+0x60 #6 0xffff000000770094 at do_el0_sync+0x4a0 #7 0xffff00000074fa1c at handle_el0_sync+0x90 This is running # uname -a FreeBSD asn 14.0-CURRENT FreeBSD 14.0-CURRENT #0 main-n247543-33e1287b6a54:= Mon Jun 28 10:31:58 CEST 2021=20=20=20=20 root@asn:/usr/obj/usr/src/arm64.aarch64/sys/GENERIC arm64 --=20 You are receiving this mail because: You are the assignee for the bug.=
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