chroot segmentation fault

[Deleted user]

Problem description
Getting "segmentation fault" when trying to chroot into alpine rootfs.

$ tsu
# cd /data/alpine
# which chroot
/data/data/com.termux/files/usr/bin/chroot
# chroot . /bin/su
Segmentation fault

System binary works fine:

# /system/bin/chroot . /bin/su
/ #

Steps to reproduce
Just do chroot /path/to/fs /bin/sh. I used Alpine Linux rootfs.
It also easily crashes with chroot /.

Expected behavior
Chroot should execute specified command inside rootfs without any problem.

Additional information

Updatable packages:
All packages up to date
Subscribed repositories:
https://dl.bintray.com/xeffyr/x11-packages-24 x11/main
https://dl.bintray.com/grimler/science-packages-24 science/stable
https://dl.bintray.com/grimler/termux-root-packages-24 root/stable
https://dl.bintray.com/grimler/game-packages-24 games/stable
https://dl.bintray.com/termux/termux-packages-24 stable/main
System information:
Linux localhost 3.18.140-g674a3b7ff94 #1 SMP PREEMPT Sun Jun 9 17:46:45 UTC 2019 aarch64 Android
Termux-packages arch:
aarch64
Android version:
9
Device manufacturer:
samsung
Device model:
SM-G930F

[Grimler91]

Seems that the canonicalize_filename_mode returns null on aarch64 (test on arm works).

Commenting out the canonicalization makes it succeed:

--- ../chroot.c.orig	2019-07-08 21:49:48.036241547 +0200
+++ ./src/chroot.c	2019-07-08 21:48:58.030861309 +0200
@@ -170,10 +170,10 @@
 static bool
 is_root (const char* dir)
 {
-  char *resolved = canonicalize_file_name (dir);
-  bool is_res_root = resolved && STREQ ("/", resolved);
-  free (resolved);
-  return is_res_root;
+  //char *resolved = canonicalize_file_name (dir);
+  //bool is_res_root = resolved && STREQ ("/", resolved);
+  //free (resolved);
+  return true;
 }
 
 void

I'll look into the failing function and see if I can understand the error.

[Deleted user]

Closing since chroot built with coreutils works properly. The separate one should be removed.