Symbol relocation errors when used with more than 1 layer on squashfs or dwarfs filesystems

[ruanformigoni]

Greetings,

I've found an issue where if overlayfs is used with more than one layer it breaks system libraries when used with squashfs or dwarfs. This is shown by symbol not found errors:

Error relocating /usr/lib/libQt5Gui.so.5: glLoadIdentity: symbol not found
Error relocating /usr/lib/libQt5Gui.so.5: glMatrixMode: symbol not found
Error relocating /usr/lib/libQt5Gui.so.5: glLoadMatrixf: symbol not found
Error relocating /usr/lib/libQt5Gui.so.5: glOrtho: symbol not found
Error relocating /usr/lib/libxcb.so.1: XauGetBestAuthByAddr: symbol not found
Error relocating /usr/lib/libxcb.so.1: XauDisposeAuth: symbol not found

If I copy the libraries to the upper directory, it works again. Here is a script to replicate the issue, it quickly sets up two layers, one with an xorg base and another with krita and its dependencies, the issue arises when krita (layer-1) requires libraries from layer-0. If everything is on the same layer this issue does not happen.

#!/usr/bin/env bash

# Script to setup alpine base
# First layer contains an xorg setup
# Second layer contains krita and its dependencies

set -x

DIR_SCRIPT="$(cd -- "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

DIR_BUILD="$DIR_SCRIPT"/build

# Cleanup previous execution
fusermount -u "$DIR_BUILD/mount"
rm -rf "$DIR_BUILD/mount"
fusermount -u "$DIR_BUILD/root-0"
rm -rf "$DIR_BUILD/root-0"
fusermount -u "$DIR_BUILD/root-1"
rm -rf "$DIR_BUILD/root-1"

rm -rf "$DIR_BUILD"
mkdir -p "$DIR_BUILD"
cd "$DIR_BUILD"

# Bootstrap alpine
wget -O apk-tools.apk http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/apk-tools-static-2.10.8-r1.apk
tar zxf apk-tools.apk
./sbin/apk.static --arch x86_64 -X http://dl-cdn.alpinelinux.org/alpine/latest-stable/main/ -U --allow-untrusted --root ./root-0 --initdb add alpine-base
{ sed -E 's/^\s+://' | tee ./root-0/etc/apk/repositories; } <<-END
  :http://dl-cdn.alpinelinux.org/alpine/v3.16/main
  :http://dl-cdn.alpinelinux.org/alpine/v3.16/community
  :#http://dl-cdn.alpinelinux.org/alpine/edge/main
  :#http://dl-cdn.alpinelinux.org/alpine/edge/community
  :#http://dl-cdn.alpinelinux.org/alpine/edge/testing
END

# Configure base
proot -R ./root-0 /bin/sh -c 'apk update'
proot -R ./root-0 /bin/sh -c 'apk upgrade'
proot -R ./root-0 /bin/sh -c 'setup-xorg-base'

# Compress first layer
mksquashfs root-0 root-0.layer
# Remove original root & replace with mounted squashfs
rm -rf root-0 && mkdir root-0
# Mount root
squashfuse root-0.layer root-0
# Mount overlayfs and install krita
mkdir -p upper work mount
overlayfs \
  -o lowerdir="$DIR_BUILD"/root-0 \
  -o upperdir="$DIR_BUILD"/upper \
  -o workdir="$DIR_BUILD"/work \
  mount
proot -R ./mount /bin/sh -c 'apk add krita'
fusermount -u mount
# Compress second layer
mksquashfs upper root-1.layer
# Remove original root & replace with mounted squashfs
rm -rf upper && mkdir -p upper root-1
# Mount root
squashfuse root-1.layer root-1
overlayfs \
  -o lowerdir="$DIR_BUILD"/root-1:"$DIR_BUILD"/root-0 \
  -o upperdir="$DIR_BUILD"/upper \
  -o workdir="$DIR_BUILD"/work \
  mount
proot -R ./mount /bin/sh -c 'krita'

Note that this is not a proot issue, since this also breaks in bwrap. I tested with bwrap new --overlay options, and they do not present the issue found here.

[ruanformigoni]

The commit 6a0de4a is the culprit behind this issue, reverting to the one previous to it with git reset --hard 918e19c fixes the symbol issues and krita opens.

[tjwoodall]

I'm seeing something very similar. However, reverting the commit suggested above didn't help. I haven't tried going back to the commit suggested.

$ cat test-chroot.sh 
#!/bin/bash

unshare --mount -r /bin/bash <<LXEOF
  ./test.sh
LXEOF

exit 0

$ cat test.sh
#!/bin/bash

set -Eeuo pipefail

TRACEX="set -x"
#TRACEX=
export PS4='+${BASH_SOURCE:-}:${LINENO:-}:${FUNCNAME:-} $ '
${TRACEX}

HOMEDIR=$( readlink -f "$( dirname "${BASH_SOURCE[0]}" )" )

# shellcheck disable=SC2317  # called from a trap
cleanup()
{
  set +x
  cd "${HOMEDIR}/"
  umount "${BUILDCHROOT}"
  umount "${SCRATCHDIR}/lower0"
  umount "${SCRATCHDIR}/lower1"

  [[ -z ${SCRATCHDIR:-} ]] || rm -fr --one-file-system "${SCRATCHDIR}"
}

trap cleanup EXIT

build_deb()
{
  local dist=${1}
  local arch=${2}

  SCRATCHDIR=$( mktemp -d -p "/tmp" scratch.XXXXXXXXXX )
  BUILDCHROOT=${SCRATCHDIR}/build.chroot
  mkdir -p "${BUILDCHROOT}"
  mkdir "${SCRATCHDIR}/overlay"
  mkdir "${SCRATCHDIR}/work"
  mkdir "${SCRATCHDIR}/lower0"
  mkdir "${SCRATCHDIR}/lower1"
  squashfuse "/mnt/mirror/ftp/mirror/bootstrap/tarfiles/${dist}.${arch}.minimal.sqfs" "${SCRATCHDIR}/lower0"
  squashfuse "/mnt/mirror/ftp/mirror/bootstrap/tarfiles/${dist}.${arch}.build-deb.sqfs" "${SCRATCHDIR}/lower1"
  fuse-overlayfs -o lowerdir="${SCRATCHDIR}/lower1:${SCRATCHDIR}/lower0,upperdir=${SCRATCHDIR}/overlay,workdir=${SCRATCHDIR}/work" "${BUILDCHROOT}"

#  find ${BUILDCHROOT}/etc/apt -xdev -type d >& /dev/null

  touch "${BUILDCHROOT}/etc/apt/x"

  /sbin/chroot "${BUILDCHROOT}" /bin/bash <<CHEOF
    if [[ ${arch} = arm64 ]]; then
      export QEMU_CPU=max,pauth=off
    fi
    set -Eeuo pipefail
    ${TRACEX}
    export PS4='+chroot:${BASH_SOURCE:-}:${LINENO:-}:${FUNCNAME:-}:\${BASH_SOURCE:-}:\$(( ${LINENO} + \${LINENO:-} )):\${FUNCHAME:-} $ '
    cd /build

    cat >x.c <<EOF
int main (void)
{
  return 0;
}
EOF
    cc -o x x.c
CHEOF
}

build_deb "bookworm" "amd64" # fails
#build_deb "bookworm" "arm64" # fails
#build_deb "trixie" "amd64" # fails
#build_deb "trixie" "arm64" # works
echo finished at "$( date )"

exit 0

$ ./test-chroot.sh
...
+chroot:./test.sh:46:build_deb::61: $ cc -o x x.c
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_dl_audit_symbind_alt@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `__nptl_change_stack_perm@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_dl_deallocate_tls@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `__rseq_size@GLIBC_2.35'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_dl_argv@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_dl_allocate_tls@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_dl_find_dso_for_object@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `__libc_enable_secure@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_dl_fatal_printf@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_dl_exception_create@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `__tunable_get_val@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_dl_allocate_tls_init@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_dl_rtld_di_serinfo@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_rtld_global@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `__tls_get_addr@GLIBC_2.3'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `__libc_stack_end@GLIBC_2.2.5'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_dl_audit_preinit@GLIBC_PRIVATE'
/usr/bin/ld: /lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_rtld_global_ro@GLIBC_PRIVATE'
collect2: error: ld returned 1 exit status

If I comment out the touch or I uncomment the find then it compiles successfully.

$ fuse-overlayfs -V
fuse-overlayfs: version 1.16
FUSE library version 3.14.0
using FUSE kernel interface version 7.31
fusermount3 version: 3.14.0

[tjwoodall]

Found it!

e.attr.st_ino and e.ino are not consistent. st_ino typically gets set from tmp_ino which comes from the lower level while e.ino is set via node_to_inode;

The primary problem then occurs when the file is mmapped because this violates the VFS invariant and pages can be returned from the wrong file because it has two identities.

diff --git a/main.c b/main.c
index 4df64ec..0175349 100644
--- a/main.c
+++ b/main.c
@@ -957,8 +957,7 @@ rpl_stat (fuse_req_t req, struct ovl_node *node, int fd, const char *path, struc
   st->st_uid = find_mapping (st->st_uid, data, true, true);
   st->st_gid = find_mapping (st->st_gid, data, true, false);
 
-  st->st_ino = node->tmp_ino;
-  st->st_dev = node->tmp_dev;
+  st->st_ino = node_to_inode(node);
 
   if (node->loaded && node->n_links > 0)
     st->st_nlink = node->n_links;
@@ -2554,8 +2553,7 @@ ovl_do_readdir (fuse_req_t req, fuse_ino_t ino, size_t size,
           /* From the 'stbuf' argument the st_ino field and bits 12-15 of the
            * st_mode field are used.  The other fields are ignored.
            */
-          st->st_ino = node->tmp_ino;
-          st->st_dev = node->tmp_dev;
+          st->st_ino = node_to_inode(node);
           st->st_mode = node->ino->mode;
 
           entsize = fuse_add_direntry (req, p, remaining, name, st, offset + 1);

There is no need to set st_dev - it gets replaced by the kernel with the correct st_dev for the fuse filesystem.

I've only done some very basic checks using this patch so far but all seems good.

[tjwoodall]

In particular, the problem goes like this:
We have two files on the two different layers that have the same st_ino but different st_dev.
fuse-overlayfs returns st_dev and st_ino, which is unique, but the kernel overwrites st_dev with the st_dev for the mount point.
So now we have two completely unrelated files that have the same st_dev/st_ino identity which breaks mmap.

[tjwoodall]

Still needs work but much improved from the quick hack above here:
https://github.com/tjwoodall/fuse-overlayfs/tree/unique-inodes

I've tried to roughly follow what the kernel overlayfs does.

#!/bin/bash

#set -x

mkdir -p lower
mkdir -p upper
mkdir -p mnt

touch lower/lower
touch upper/upper

/mnt/nobackup/build/fuse-overlayfs/overlay/build/fuse-overlayfs/fuse-overlayfs -o lowerdir=lower:upper mnt

echo
echo "All on same fs - ino passthrough - stable ino"
echo -n "lower/lower "
stat -c %i lower/lower
echo -n "upper/upper "
stat -c %i upper/upper
echo -n "  mnt/lower "
stat -c %i mnt/lower
echo -n "  mnt/upper "
stat -c %i mnt/upper

umount mnt

rm -f img
truncate -s 10M img
/sbin/mke2fs -t ext2 img >& /dev/null

mkdir -p ext2

fuse2fs -o fakeroot,uid=$(id -u),gid=$(id -u) img ext2
mkdir -p ext2/work
mkdir -p ext2/upper
mkdir -p ext2/mnt

# mount -t overlay overlay -o lowerdir=fuseoverlayfs-lower,upperdir=fuseoverlayfs-upper,workdir=fuseoverlayfs-work fuseoverlayfs-mount
echo
echo "Upper on different fs - non-stable ino across mounts"
/mnt/nobackup/build/fuse-overlayfs/overlay/build/fuse-overlayfs/fuse-overlayfs -o lowerdir=lower:upper,upperdir=ext2/upper,workdir=ext2/work mnt
echo -n "  mnt/lower "
stat -c %i mnt/lower
echo -n "  mnt/upper "
stat -c %i mnt/upper
umount mnt
echo "=="
/mnt/nobackup/build/fuse-overlayfs/overlay/build/fuse-overlayfs/fuse-overlayfs -o lowerdir=lower:upper,upperdir=ext2/upper,workdir=ext2/work mnt
echo -n "  mnt/lower "
stat -c %i mnt/lower
echo -n "  mnt/upper "
stat -c %i mnt/upper
umount mnt

echo
echo "Upper on different fs xino - stable ino across mounts"
/mnt/nobackup/build/fuse-overlayfs/overlay/build/fuse-overlayfs/fuse-overlayfs -o xino,lowerdir=lower:upper,upperdir=ext2/upper,workdir=ext2/work mnt
echo -n "  mnt/lower "
stat -c %i mnt/lower
echo -n "  mnt/upper "
stat -c %i mnt/upper
umount mnt
echo "=="
/mnt/nobackup/build/fuse-overlayfs/overlay/build/fuse-overlayfs/fuse-overlayfs -o xino,lowerdir=lower:upper,upperdir=ext2/upper,workdir=ext2/work mnt
echo -n "  mnt/lower "
stat -c %i mnt/lower
echo -n "  mnt/upper "
stat -c %i mnt/upper
umount mnt

echo
echo "kernel fuse - disables xino - non-stable ino across mounts"
/mnt/nobackup/build/fuse-overlayfs/overlay/build/fuse-overlayfs/fuse-overlayfs -o xino,lowerdir=lower:upper:fuseoverlayfs-mount mnt
echo -n "  mnt/lower "
stat -c %i mnt/lower
echo -n "  mnt/upper "
stat -c %i mnt/upper
umount mnt
echo "=="
/mnt/nobackup/build/fuse-overlayfs/overlay/build/fuse-overlayfs/fuse-overlayfs -o xino,lowerdir=lower:upper:fuseoverlayfs-mount mnt
echo -n "  mnt/lower "
stat -c %i mnt/lower
echo -n "  mnt/upper "
stat -c %i mnt/upper

umount mnt

umount ext2

rm -fr lower upper mnt img ext2

$ ./test-passthrough.sh 

All on same fs - ino passthrough - stable ino
lower/lower 3416920
upper/upper 3416921
  mnt/lower 3416920
  mnt/upper 3416921

Upper on different fs - non-stable ino across mounts
  mnt/lower 94353636742544
  mnt/upper 94353636742800
==
  mnt/lower 94220651775376
  mnt/upper 94220651775632

Upper on different fs xino - stable ino across mounts
  mnt/lower 1428392772843533875
  mnt/upper 742672234944029848
==
  mnt/lower 1428392772843533875
  mnt/upper 742672234944029848

kernel fuse - disables xino - non-stable ino across mounts
  mnt/lower 93855548077344
  mnt/upper 93855548077600
==
  mnt/lower 94202806027552
  mnt/upper 94202806027808

[tjwoodall]

I've now got a small testcase that I'll add to that branch:

cat test-mmap.sh 
#!/bin/bash

set -e

BIN=../fuse-overlayfs
BIN=fuse-overlayfs

cleanup()
{
  umount mnt || true
  umount ext1 ext2 || true
  rm -fr mnt img1 img2 ext1 ext2 mupper mlower

  echo
  echo "FAILED"
  echo
}

trap cleanup EXIT

rm -fr mnt img1 img2 ext1 ext2

# override any other settings.
export LC_ALL=C

echo
echo "Testing mmap where files have the same inodes across layers."

rm -f img1
truncate -s 10M img1
/sbin/mke2fs -t ext2 img1 >& /dev/null
rm -f img2
truncate -s 10M img2
/sbin/mke2fs -t ext2 img2 >& /dev/null
mkdir -p ext1
mkdir -p ext2
fuse2fs -o fakeroot,uid=0,gid=0 img1 ext1
fuse2fs -o fakeroot,uid=0,gid=0 img2 ext2

# We assume that the files will get the same inode number on both layers, this is checked in test-passthrough.sh for a single file.
dst=ext1
for i in $( ldd $( gcc -print-prog-name=cc1 ) | awk '{print $3}' ); do
  cp $i $dst
  if [[ $dst == ext1 ]]; then
    dst=ext2
  else
    dst=ext1
  fi
done

mkdir mnt
$BIN -o lowerdir=ext2:ext1 mnt

echo "int main(void) { return 0; }" >test.c

LD_LIBRARY_PATH=mnt/ gcc test.c

echo "PASSED"

umount mnt

umount ext1
umount ext2

rm -fr mnt img1 img2 ext1 ext2

trap - EXIT
echo
echo "FINISHED"
echo

Which fails like this:

./test-mmap.sh 

Testing mmap where files have the same inodes across layers.
unknown argument ignored: lazytime
gcc: mnt/libm.so.6: version `GLIBC_2.33' not found (required by gcc)
gcc: mnt/libm.so.6: version `GLIBC_2.14' not found (required by gcc)
gcc: mnt/libm.so.6: version `GLIBC_2.11' not found (required by gcc)
gcc: mnt/libm.so.6: version `GLIBC_2.3.4' not found (required by gcc)
gcc: mnt/libm.so.6: version `GLIBC_2.6' not found (required by gcc)
gcc: mnt/libm.so.6: version `GLIBC_2.34' not found (required by gcc)
gcc: mnt/libm.so.6: version `GLIBC_2.3' not found (required by gcc)
gcc: mnt/libm.so.6: version `GLIBC_2.33' not found (required by /lib/x86_64-linux-gnu/libfmt.so.10)
gcc: mnt/libm.so.6: version `GLIBC_2.3.4' not found (required by /lib/x86_64-linux-gnu/libfmt.so.10)
gcc: mnt/libm.so.6: version `GLIBC_2.14' not found (required by /lib/x86_64-linux-gnu/libfmt.so.10)
gcc: mnt/libm.so.6: version `GLIBC_2.14' not found (required by /lib/x86_64-linux-gnu/libxxhash.so.0)
gcc: mnt/libm.so.6: version `GLIBC_2.3.4' not found (required by mnt/libzstd.so.1)
gcc: mnt/libm.so.6: version `GLIBC_2.34' not found (required by mnt/libzstd.so.1)
gcc: mnt/libm.so.6: version `GLIBC_2.8' not found (required by mnt/libzstd.so.1)
gcc: mnt/libm.so.6: version `GLIBC_2.14' not found (required by mnt/libzstd.so.1)
gcc: mnt/libm.so.6: version `GLIBC_2.3.2' not found (required by mnt/libzstd.so.1)
gcc: mnt/libm.so.6: version `GLIBC_2.14' not found (required by /lib/x86_64-linux-gnu/libhiredis.so.1.1.0)
gcc: mnt/libm.so.6: version `GLIBC_2.3.4' not found (required by /lib/x86_64-linux-gnu/libhiredis.so.1.1.0)
gcc: mnt/libm.so.6: version `GLIBC_2.3' not found (required by /lib/x86_64-linux-gnu/libhiredis.so.1.1.0)
gcc: mnt/libm.so.6: version `GLIBC_2.14' not found (required by /lib/x86_64-linux-gnu/libstdc++.so.6)
gcc: mnt/libm.so.6: version `GLIBC_2.6' not found (required by /lib/x86_64-linux-gnu/libstdc++.so.6)
gcc: mnt/libm.so.6: version `GLIBC_2.33' not found (required by /lib/x86_64-linux-gnu/libstdc++.so.6)
gcc: mnt/libm.so.6: version `GLIBC_2.17' not found (required by /lib/x86_64-linux-gnu/libstdc++.so.6)
gcc: mnt/libm.so.6: version `GLIBC_2.3' not found (required by /lib/x86_64-linux-gnu/libstdc++.so.6)
gcc: mnt/libm.so.6: version `GLIBC_2.36' not found (required by /lib/x86_64-linux-gnu/libstdc++.so.6)
gcc: mnt/libm.so.6: version `GLIBC_2.3.2' not found (required by /lib/x86_64-linux-gnu/libstdc++.so.6)
gcc: mnt/libm.so.6: version `GLIBC_2.34' not found (required by /lib/x86_64-linux-gnu/libstdc++.so.6)
gcc: mnt/libm.so.6: version `GLIBC_2.36' not found (required by mnt/libm.so.6)
gcc: mnt/libm.so.6: version `GLIBC_ABI_DT_RELR' not found (required by mnt/libm.so.6)
gcc: mnt/libm.so.6: version `GLIBC_PRIVATE' not found (required by mnt/libm.so.6)
gcc: mnt/libm.so.6: version `GLIBC_2.14' not found (required by /lib/x86_64-linux-gnu/libgcc_s.so.1)
gcc: mnt/libm.so.6: version `GLIBC_2.34' not found (required by /lib/x86_64-linux-gnu/libgcc_s.so.1)
gcc: mnt/libm.so.6: version `GLIBC_2.3.2' not found (required by /lib/x86_64-linux-gnu/libgcc_s.so.1)

FAILED

and with the changes in that branch:

./test-mmap.sh 

Testing mmap where files have the same inodes across layers.
PASSED

FINISHED

[tjwoodall]

Created a merge request: #452

[tjwoodall]

The issues I was seeing with the above MR appear to be a consequence of older userspace that did not always correctly handle 64 bit inodes. The branch now includes an option -o ino32_t which masks out the high order bits and my basic tests suggest that all is ok.

I have a variety of setups I can test this on all the way back to debian jessie on amd64, i386, arm64 and armel, once all my tests are completed I'll reopen the MR.

I didn't investigate the issue in detail but when running gcc as /usr/lib/ccache/gcc on an i386 buster system, it appears to get into what is most likely an infinite recursion doing stat on / eventually leading to SIGSEGV.

/sbin/chroot mount /bin/bash

root@dirac:/# dpkg --print-architecture
i386
root@dirac:/# cat /etc/debian_version 
10.13
root@dirac:/# gcc
Segmentation fault
root@dirac:/# which gcc
/usr/lib/ccache/gcc
root@dirac:/# strace -f gcc |& cat -n
    53  openat(AT_FDCWD, "/etc/ccache.conf", O_RDONLY) = 3
    54  fstat64(3, {st_mode=S_IFREG|0664, st_size=20, ...}) = 0
    55  read(3, "cache_dir = /ccache\n", 8192)  = 20
    56  read(3, "", 8192)                       = 0
    57  close(3)                                = 0
    58  openat(AT_FDCWD, "/ccache/ccache.conf", O_RDONLY) = -1 ENOENT (No such file or directory)
    59  stat64("/ccache", {st_mode=S_IFDIR|0775, st_size=0, ...}) = 0
    60  stat64("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
...
 65502  stat64("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
 65503  stat64("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
 65504  stat64("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
 65505  --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0xff0fefa0} ---
 65506  +++ killed by SIGSEGV +++

using -o ino32_t fixes.

[tjwoodall]

#455

Won't let me reopen the previous branch.