Re: kern/55370: Invalid modification/connection time with mount_null(8)

[Thomas Klausner <wiz%NetBSD.org@localhost>]

The following reply was made to PR kern/55370; it has been noted by GNATS.

From: Thomas Klausner <wiz%NetBSD.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: maya%NetBSD.org@localhost
Subject: Re: kern/55370: Invalid modification/connection time with
 mount_null(8)
Date: Thu, 30 Jul 2020 16:20:04 +0200

 On Tue, Jul 21, 2020 at 06:55:01PM +0000, coypu%sdf.org@localhost wrote:
 >  time wise, this fits with ad@'s namei changes in May 26.
 >  this is a revert to test this hypothesis, for anyone who can easily
 >  reproduce this problem: http://coypu.sdf.org/namei
 
 I tried today's current with this patch reverse-applied, but I still
 see the same issue building gcc8 in a sandbox with null mounts:
 
 ving directory '/scratch/lang/gcc8/work/build'
 Comparing stages 2 and 3
 warning: gcc/cc1obj-checksum.o differs
 warning: gcc/cc1objplus-checksum.o differs
 Bootstrap comparison failure!
 gcc/version.o differs
 gcc/crtbegin.o differs
 gcc/crtend.o differs
 gcc/crtbeginS.o differs
 gcc/crtendS.o differs
 gcc/crtbeginT.o differs
 gmp/mpf/init.o differs
 gmp/mpf/get_dfl_prec.o differs
 gmp/mpf/int_p.o differs
 gmp/mpf/fits_uint.o differs
 gmp/mpf/fits_ushort.o differs
 gmp/mpn/fib_table.o differs
 gmp/mpn/com.o differs
 gmp/mpn/diveby3.o differs
 gmp/mpn/cmp.o differs
 gmp/mpq/clear.o differs
 gmp/mpz/clear.o differs
 gmp/mpz/fits_ushort.o differs
 gmp/mpz/get_d.o differs
 gmp/mpz/iset_d.o differs
 gmp/mpz/iset_ui.o differs
 gmp/mpz/perfpow.o differs
 gmp/mpz/size.o differs
 gmp/rand/randclr.o differs
 gmp/rand/randsd.o differs
 gmp/invalid.o differs
 gmp/mp_set_fns.o differs
 intl/dcngettext.o differs
 intl/ngettext.o differs
 intl/osdep.o differs
 isl/isl_deprecated.o differs
 isl/isl_ffs.o differs
 isl/isl_version.o differs
 isl/polyhedron_detect_equalities.o differs
 libbacktrace/.libs/state.o differs
 libiberty/pic/lrealpath.o differs
 libiberty/pic/stack-limit.o differs
 libiberty/pic/xasprintf.o differs
 libiberty/pic/xatexit.o differs
 libiberty/fdmatch.o differs
 libiberty/fopen_unlocked.o differs
 libiberty/getruntime.o differs
 libiberty/hex.o differs
 libiberty/lrealpath.o differs
 libiberty/timeval-utils.o differs
 libiberty/xatexit.o differs
 libiberty/xmemdup.o differs
 libiberty/xstrdup.o differs
 libiberty/xstrerror.o differs
 libiberty/mempcpy.o differs
 mpc/src/add_ui.o differs
 mpc/src/cmp.o differs
 mpc/src/conj.o differs
 mpc/src/cosh.o differs
 mpc/src/cos.o differs
 mpc/src/div_fr.o differs
 mpc/src/fr_sub.o differs
 mpc/src/get_version.o differs
 mpc/src/get_prec.o differs
 mpc/src/init3.o differs
 mpc/src/mul_si.o differs
 mpc/src/real.o differs
 mpc/src/sin.o differs
 mpc/src/sub.o differs
 mpc/src/tanh.o differs
 mpc/src/ui_div.o differs
 mpfr/src/isinf.o differs
 mpfr/src/isnan.o differs
 mpfr/src/print_rnd_mode.o differs
 mpfr/src/set_inf.o differs
 mpfr/src/version.o differs
 mpfr/src/mp_clz_tab.o differs
 mpfr/src/iszero.o differs
 mpfr/src/logging.o differs
 mpfr/src/get_patches.o differs
 mpfr/src/isregular.o differs
 mpfr/src/mpfr-mini-gmp.o differs
 x86_64--netbsd/libgcc/sfp-exceptions.o differs
 x86_64--netbsd/libgcc/negtf2.o differs
 x86_64--netbsd/libgcc/floatunsitf.o differs
 x86_64--netbsd/libgcc/enable-execute-stack.o differs
 x86_64--netbsd/libgcc/sfp-exceptions_s.o differs
 x86_64--netbsd/libgcc/negtf2_s.o differs
 x86_64--netbsd/libgcc/enable-execute-stack_s.o differs
 x86_64--netbsd/libgcc/crtbegin.o differs
 x86_64--netbsd/libgcc/crtend.o differs
 x86_64--netbsd/libgcc/crtendS.o differs
 x86_64--netbsd/libgcc/crtbeginS.o differs
 x86_64--netbsd/libgcc/crtbeginT.o differs
 x86_64--netbsd/libgomp/.libs/mutex.o differs
 x86_64--netbsd/libgomp/.libs/ptrlock.o differs
 x86_64--netbsd/libgomp/ptrlock.o differs
 x86_64--netbsd/libstdc++-v3/libsupc++/atexit_arm.o differs
 x86_64--netbsd/libstdc++-v3/src/c++98/list-aux-2.o differs
 x86_64--netbsd/libstdc++-v3/src/.libs/compatibility-debug_list-2.o differs
 x86_64--netbsd/libstdc++-v3/src/compatibility-debug_list-2.o differs
 gmake[2]: *** [Makefile:26302: compare] Error 1
 gmake[2]: Leaving directory '/scratch/lang/gcc8/work/build'
 gmake[1]: *** [Makefile:26282: stage3-bubble] Error 2
 gmake[1]: Leaving directory '/scratch/lang/gcc8/work/build'
 gmake: *** [Makefile:949: all] Error 2
 *** Error code 2
 
 Stop.
 
 
 
 In case someone's interested, here's such a sandbox:
 
 tmpfs on /sandboxes/client4 type tmpfs (local)
 ptyfs on /sandboxes/client4/dev/ptyfs type ptyfs (local)
 procfs on /sandboxes/client4/proc type procfs (local)
 /bin on /sandboxes/client4/bin type null (read-only, local)
 /sbin on /sandboxes/client4/sbin type null (read-only, local)
 /lib on /sandboxes/client4/lib type null (read-only, local)
 /libexec on /sandboxes/client4/libexec type null (read-only, local)
 /usr/bin on /sandboxes/client4/usr/bin type null (read-only, local)
 /usr/games on /sandboxes/client4/usr/games type null (read-only, local)
 /usr/include on /sandboxes/client4/usr/include type null (read-only, local)
 /usr/lib on /sandboxes/client4/usr/lib type null (read-only, local)
 /usr/libdata on /sandboxes/client4/usr/libdata type null (read-only, local)
 /usr/libexec on /sandboxes/client4/usr/libexec type null (read-only, local)
 /usr/share on /sandboxes/client4/usr/share type null (read-only, local)
 /usr/sbin on /sandboxes/client4/usr/sbin type null (read-only, local)
 /usr/X11R7 on /sandboxes/client4/usr/X11R7 type null (read-only, local)
 /var/mail on /sandboxes/client4/var/mail type null (read-only, local)
 /usr/src on /sandboxes/client4/usr/src type null (read-only, local)
 /usr/pkgsrc on /sandboxes/client4/usr/pkgsrc type null (local)
 /usr/xsrc on /sandboxes/client4/usr/xsrc type null (read-only, local)
 /packages/9.99.69 on /sandboxes/client4/packages type null (local)
 /distfiles on /sandboxes/client4/distfiles type null (local)