federunix commented 5 years ago

I am recovering the content of my /Users directory from a boot disk with APFS from an old iMac 2011 that died. I mounted the disk on a Linux workstation and when I try to make a tar archive of a specific folder apfs-fuse with a segmentation fault.

I can reproduce 100% if I try to tar this specific folder.

./apfs-fuse -d 3 /dev/sda2 /tmp/federiMac

.... apfs_lookup: ino=2fa4c25 name=roma1.gif => OK apfs_stat_internal => OK apfs_open: 2fa4c2a apfs_read: ino=2fa4c2a size=4000 off=0 apfs_release 2fa4c2a apfs_lookup: ino=2fa4c25 name=aosta1.gif => OK apfs_stat_internal => OK apfs_open: 2fa4c26 apfs_read: ino=2fa4c26 size=4000 off=0 apfs_read: ino=2fa4c26 size=1000 off=4000 apfs_release 2fa4c26 apfs_lookup: ino=2fa4c25 name=head2cg.gif => OK apfs_stat_internal => OK apfs_open: 2fa4c27 apfs_read: ino=2fa4c27 size=3000 off=0 apfs_release 2fa4c27 apfs_releasedir 2fa4c25 apfs_releasedir 2fa4c23 apfs_lookup: ino=2fa3ece name=.DS_Store => OK apfs_stat_internal => OK apfs_open: 2fa4d40 apfs_read: ino=2fa4d40 size=2000 off=0 apfs_release 2fa4d40 apfs_lookup: ino=2fa3ece name=cucina internazionale => OK apfs_stat_internal => OK apfs_opendir: 2fa3ecf apfs_readdir: 2fa3ecf Segmentation fault (core dumped) ....

gdb ./apfs-fuse core

GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: http://www.gnu.org/software/gdb/bugs/. Find the GDB manual and other documentation resources online at: http://www.gnu.org/software/gdb/documentation/. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from ./apfs-fuse...(no debugging symbols found)...done. [New LWP 14174] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Core was generated by `./apfs-fuse -d 3 /dev/sda2 /tmp/federiMac'. Program terminated with signal SIGSEGV, Segmentation fault.

0 0x00005607feba9df0 in NormalizeFoldString(std::vector<char32_t, std::allocator >&, std::vector<char32_t, std::allocator > const&, bool)

()

(gdb) where

0 0x00005607feba9df0 in NormalizeFoldString(std::vector<char32_t, std::allocator >&, std::vector<char32_t, std::allocator > const&, bool)

()

1 0x00005607feba764f in StrCmpUtf8NormalizedFolded(unsigned char const, unsigned char const, bool) ()

2 0x00005607feb9150b in BTree::FindBin(std::shared_ptr const&, void const, unsigned long, int ()(void const, unsigned long, void const, unsigned long, void), void, BTree::FindMode) ()

3 0x00005607feb949f5 in BTree::GetIterator(BTreeIterator&, void const, unsigned long, int ()(void const, unsigned long, void const, unsigned long, void), void) ()

4 0x00005607feb8243c in ApfsDir::ListDirectory(std::vector<ApfsDir::DirRec, std::allocator >&, unsigned long) ()

5 0x00005607feb7c255 in apfs_readdir(fuse_req, unsigned long, unsigned long, long, fuse_file_info) ()

6 0x00007f93b7a020c6 in ?? () from /lib/x86_64-linux-gnu/libfuse.so.2

7 0x00007f93b7a036c1 in ?? () from /lib/x86_64-linux-gnu/libfuse.so.2

8 0x00007f93b79ffa6c in fuse_session_loop ()

from /lib/x86_64-linux-gnu/libfuse.so.2

9 0x00005607feb7af00 in main ()

(gdb) bt full

0 0x00005607feba9df0 in NormalizeFoldString(std::vector<char32_t, std::allocator >&, std::vector<char32_t, std::allocator > const&, bool)

()