kern/55004: Hundreds of file system tests now fail on real hardware

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         55004
>Category:       kern
>Synopsis:       Hundreds of file system tests now fail on real hardware
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Feb 22 16:15:00 +0000 2020
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current, source date >= 2020.02.21.02.04.40
>Organization:

>Environment:
System: NetBSD
Architecture: x86_64
Machine: amd64
>Description:

My amd64 testbed bare metal is showing hundreds of new test failures
in file system tests, such as:

  http://www.gson.org/netbsd/bugs/build/amd64-baremetal/2020/2020.02.21.02.04.40/test.html#fs_vfs_t_full_ext2fs_fillfs

The qemu-based TNF i386 testbed does not appear to be affected.

The problem started during a recent period when the system did not
even install, so it's not easily auto-bisected.  During this period,
the following commits were made:

  commit 2020.02.20.15.48.38 riastradh src/sys/kern/vfs_bio.c 1.288
  commit 2020.02.20.15.48.52 riastradh src/lib/libp2k/p2k.c 1.72
  commit 2020.02.20.18.24.20 pgoyette src/bin/sh/sh.1 1.224
  commit 2020.02.20.19.59.12 christos src/external/historical/nawk/dist/lex.c 1.7
  commit 2020.02.20.19.59.12 christos src/external/historical/nawk/dist/lib.c 1.11
  commit 2020.02.20.19.59.12 christos src/external/historical/nawk/dist/main.c 1.11
  commit 2020.02.20.19.59.12 christos src/external/historical/nawk/dist/proto.h 1.11
  commit 2020.02.20.19.59.12 christos src/external/historical/nawk/dist/run.c 1.12
  commit 2020.02.20.21.14.23 jdolecek src/sys/kern/subr_autoconf.c 1.266
  commit 2020.02.20.22.38.54 kamil src/tests/lib/libc/sys/t_ptrace_wait.c 1.164
  commit 2020.02.20.22.52.10 joerg src/sys/rump/Makefile.rump 1.125
  commit 2020.02.20.22.52.10 joerg src/sys/rump/librump/rumpkern/kobj_rename.c 1.3
  commit 2020.02.20.23.57.16 kamil src/tests/lib/libc/sys/t_ptrace_x86_wait.h 1.24
  commit 2020.02.21.00.26.21 joerg src/external/bsd/libevent/dist/test/regress_http.c 1.6
  commit 2020.02.21.00.26.21 joerg src/external/bsd/libevent/dist/test/regress_ssl.c 1.4
  commit 2020.02.21.00.26.22 joerg src/external/bsd/wpa/dist/src/radius/radius_client.c 1.2
  commit 2020.02.21.00.26.22 joerg src/external/cddl/osnet/dist/tools/ctf/cvt/iidesc.c 1.4
  commit 2020.02.21.00.26.22 joerg src/sys/arch/x86/x86/spectre.c 1.34
  commit 2020.02.21.00.26.22 joerg src/sys/arch/x86/x86/tsc.c 1.38
  commit 2020.02.21.00.26.22 joerg src/sys/dev/clockctl.c 1.38
  commit 2020.02.21.00.26.22 joerg src/sys/dev/nvmm/x86/nvmm_x86_svm.c 1.56
  commit 2020.02.21.00.26.22 joerg src/sys/dev/nvmm/x86/nvmm_x86_vmx.c 1.49
  commit 2020.02.21.00.26.22 joerg src/sys/dist/pf/net/pf_ioctl.c 1.57
  commit 2020.02.21.00.26.22 joerg src/sys/external/bsd/ipf/netinet/ip_fil_netbsd.c 1.34
  commit 2020.02.21.00.26.22 joerg src/sys/kern/kern_ktrace.c 1.175
  commit 2020.02.21.00.26.22 joerg src/sys/kern/kern_proc.c 1.241
  commit 2020.02.21.00.26.22 joerg src/sys/kern/kern_resource.c 1.186
  commit 2020.02.21.00.26.22 joerg src/sys/kern/kern_veriexec.c 1.23
  commit 2020.02.21.00.26.22 joerg src/sys/kern/sys_pset.c 1.23
  commit 2020.02.21.00.26.22 joerg src/sys/kern/sysv_ipc.c 1.41
  commit 2020.02.21.00.26.22 joerg src/sys/kern/uipc_socket.c 1.287
  commit 2020.02.21.00.26.22 joerg src/sys/kern/vfs_init.c 1.50
  commit 2020.02.21.00.26.23 joerg src/sys/net/if.c 1.473
  commit 2020.02.21.00.26.23 joerg src/sys/netsmb/smb_conn.c 1.31
  commit 2020.02.21.00.26.23 joerg src/sys/secmodel/extensions/secmodel_extensions.c 1.11
  commit 2020.02.21.00.26.23 joerg src/sys/secmodel/keylock/secmodel_keylock.c 1.10
  commit 2020.02.21.00.26.23 joerg src/sys/secmodel/securelevel/secmodel_securelevel.c 1.33
  commit 2020.02.21.00.26.23 joerg src/sys/secmodel/suser/secmodel_suser.c 1.51
  commit 2020.02.21.02.04.40 riastradh src/sys/kern/vfs_bio.c 1.289

>How-To-Repeat:

>Fix: