require "pkcs11" segfaults sometimes at startup

[larskanis]

This can be reproduced by

ruby -e "require 'ffi'; GC.stress=true; require 'pkcs11_ext'"

require 'ffi' is unrelated and could be any other rubygem. It only makes sure, that rubygems is fully loaded, so that GC.stress doesn't slow this part of the startup.

Output is like:

/home/lars/.rvm/gems/ruby-2.7.2/gems/pkcs11-0.3.2/lib/pkcs11_ext.so: [BUG] Segmentation fault at 0x0000000000000ce9
ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0006 p:-11797786123924 s:0034 e:000033 TOP    [FINISH]
c:0005 p:---- s:0031 e:000030 CFUNC  :require
c:0004 p:0091 s:0026 e:000025 RESCUE /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:168
c:0003 p:0802 s:0022 e:000021 METHOD /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:156
c:0002 p:0025 s:0006 e:000005 EVAL   -e:1 [FINISH]
c:0001 p:0000 s:0003 E:000ae0 (none) [FINISH]

-- Ruby level backtrace information ----------------------------------------
-e:1:in `<main>'
/home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:156:in `require'
/home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:168:in `rescue in require'
/home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:168:in `require'

-- Machine register context ------------------------------------------------
 RIP: 0x00007fa14ddb32ac RBP: 0x000055d7168d3018 RSP: 0x00007fffe0cf4290
 RAX: 0x000055d7168d3028 RBX: 0x0000000000000002 RCX: 0x000000000001207a
 RDX: 0x0000000000000010 RDI: 0x000055d7168d3028 RSI: 0x000055d7168d06d8
  R8: 0x000055d716a9f610  R9: 0x000055d716aa0008 R10: 0xfffffffffffff4c3
 R11: 0x00007fa14ddb3a00 R12: 0x000000000001207a R13: 0x0000000000000cd1
 R14: 0x00007fffe0cf4330 R15: 0x000055d7168b3768 EFL: 0x0000000000010206

-- C level backtrace information -------------------------------------------
/home/lars/.rvm/rubies/ruby-2.7.2/bin/../lib/libruby.so.2.7(rb_vm_bugreport+0x573) [0x7fa14e021b33] vm_dump.c:755
[0x7fa14de44a1b]
/home/lars/.rvm/rubies/ruby-2.7.2/bin/../lib/libruby.so.2.7(sigsegv+0x4d) [0x7fa14df7e42d] signal.c:946
/lib/x86_64-linux-gnu/libc.so.6(0x7fa14db9d210) [0x7fa14db9d210]
/home/lars/.rvm/rubies/ruby-2.7.2/bin/../lib/libruby.so.2.7(rb_ary_modify+0x9c) [0x7fa14ddb32ac] array.c:493
/home/lars/.rvm/rubies/ruby-2.7.2/bin/../lib/libruby.so.2.7(ary_ensure_room_for_push+0x5f) [0x7fa14ddb35af] array.c:623
/home/lars/.rvm/rubies/ruby-2.7.2/bin/../lib/libruby.so.2.7(rb_ary_push+0x30) [0x7fa14ddb3a30] array.c:1198
/home/lars/.rvm/gems/ruby-2.7.2/gems/pkcs11-0.3.2/lib/pkcs11_ext.so(Init_pkcs11_ext+0xb15) [0x7fa149d2db65] pk11.c:1669
/home/lars/.rvm/gems/ruby-2.7.2/gems/pkcs11-0.3.2/lib/pkcs11_ext.so(Init_pkcs11_ext) (null):0
/home/lars/.rvm/rubies/ruby-2.7.2/bin/../lib/libruby.so.2.7(dln_load+0x177) [0x7fa14ddac7d7] dln.c:1371
/home/lars/.rvm/rubies/ruby-2.7.2/bin/../lib/libruby.so.2.7(rb_vm_call_cfunc+0xb2) [0x7fa14e005332] vm.c:2225
[0x7fa14dea6464]
/home/lars/.rvm/rubies/ruby-2.7.2/bin/../lib/libruby.so.2.7(rb_require_string+0x27) [0x7fa14dea7257] load.c:1104
[0x7fa14dff9900]
[0x7fa14e00734b]
[0x7fa14e00dcc4]
/home/lars/.rvm/rubies/ruby-2.7.2/bin/../lib/libruby.so.2.7(rb_ec_exec_node+0xc1) [0x7fa14de49551] eval.c:278
/home/lars/.rvm/rubies/ruby-2.7.2/bin/../lib/libruby.so.2.7(ruby_run_node+0x4e) [0x7fa14de4ec5e] eval.c:336
/home/lars/.rvm/rubies/ruby-2.7.2/bin/ruby(main+0x5f) [0x55d7153e217f] ./main.c:50

-- Other runtime information -----------------------------------------------

* Loaded script: -e

* Loaded features:

    0 enumerator.so
    1 thread.rb
    2 rational.so
    3 complex.so
    4 ruby2_keywords.rb
    5 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/enc/encdb.so
    6 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/enc/trans/transdb.so
    7 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/rbconfig.rb
    8 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/compatibility.rb
    9 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/defaults.rb
   10 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/deprecate.rb
   11 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/errors.rb
   12 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/version.rb
   13 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/requirement.rb
   14 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/platform.rb
   15 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/basic_specification.rb
   16 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/stub_specification.rb
   17 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/util.rb
   18 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/text.rb
   19 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/user_interaction.rb
   20 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/specification_policy.rb
   21 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/util/list.rb
   22 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/specification.rb
   23 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/exceptions.rb
   24 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/bundler_version_finder.rb
   25 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/dependency.rb
   26 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/core_ext/kernel_gem.rb
   27 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/monitor.so
   28 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/monitor.rb
   29 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb
   30 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/core_ext/kernel_warn.rb
   31 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems.rb
   32 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/rubygems/path_support.rb
   33 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/version.rb
   34 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/core_ext/name_error.rb
   35 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/levenshtein.rb
   36 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/jaro_winkler.rb
   37 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/spell_checker.rb
   38 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/spell_checkers/name_error_checkers/class_name_checker.rb
   39 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/spell_checkers/name_error_checkers/variable_name_checker.rb
   40 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/spell_checkers/name_error_checkers.rb
   41 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/spell_checkers/method_name_checker.rb
   42 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/spell_checkers/key_error_checker.rb
   43 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/spell_checkers/null_checker.rb
   44 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/formatters/plain_formatter.rb
   45 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean/tree_spell_checker.rb
   46 /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/did_you_mean.rb
   47 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi_c.so
   48 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/platform.rb
   49 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/data_converter.rb
   50 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/types.rb
   51 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/library.rb
   52 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/errno.rb
   53 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/pointer.rb
   54 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/memorypointer.rb
   55 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/struct_layout.rb
   56 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/struct_layout_builder.rb
   57 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/struct_by_reference.rb
   58 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/struct.rb
   59 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/union.rb
   60 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/managedstruct.rb
   61 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/callback.rb
   62 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/io.rb
   63 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/autopointer.rb
   64 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/variadic.rb
   65 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/enum.rb
   66 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/version.rb
   67 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi/ffi.rb
   68 /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi.rb

* Process memory map:

55d7153e1000-55d7153e2000 r--p 00000000 00:4b 1341341                    /home/lars/.rvm/rubies/ruby-2.7.2/bin/ruby
55d7153e2000-55d7153e3000 r-xp 00001000 00:4b 1341341                    /home/lars/.rvm/rubies/ruby-2.7.2/bin/ruby
55d7153e3000-55d7153e4000 r--p 00002000 00:4b 1341341                    /home/lars/.rvm/rubies/ruby-2.7.2/bin/ruby
55d7153e4000-55d7153e5000 r--p 00002000 00:4b 1341341                    /home/lars/.rvm/rubies/ruby-2.7.2/bin/ruby
55d7153e5000-55d7153e6000 rw-p 00003000 00:4b 1341341                    /home/lars/.rvm/rubies/ruby-2.7.2/bin/ruby
55d71689c000-55d716d92000 rw-p 00000000 00:00 0                          [heap]
7fa14754c000-7fa1485de000 r--s 00000000 103:07 1841487                   /usr/lib/debug/lib/x86_64-linux-gnu/libc-2.31.so
7fa1485de000-7fa1487ce000 r--s 00000000 103:07 7078220                   /lib/x86_64-linux-gnu/libc-2.31.so
7fa1487ce000-7fa1492a9000 rw-p 00000000 00:00 0 
7fa1492a9000-7fa149c9f000 r--s 00000000 00:4b 1339729                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/libruby.so.2.7.2
7fa149c9f000-7fa149cd0000 r--s 00000000 00:4b 1341341                    /home/lars/.rvm/rubies/ruby-2.7.2/bin/ruby
7fa149cd0000-7fa149cd3000 r--p 00000000 103:07 7078221                   /lib/x86_64-linux-gnu/libgcc_s.so.1
7fa149cd3000-7fa149ce5000 r-xp 00003000 103:07 7078221                   /lib/x86_64-linux-gnu/libgcc_s.so.1
7fa149ce5000-7fa149ce9000 r--p 00015000 103:07 7078221                   /lib/x86_64-linux-gnu/libgcc_s.so.1
7fa149ce9000-7fa149cea000 r--p 00018000 103:07 7078221                   /lib/x86_64-linux-gnu/libgcc_s.so.1
7fa149cea000-7fa149ceb000 rw-p 00019000 103:07 7078221                   /lib/x86_64-linux-gnu/libgcc_s.so.1
7fa149d17000-7fa149d1a000 r--p 00000000 00:4b 1342998                    /home/lars/.rvm/gems/ruby-2.7.2/gems/pkcs11-0.3.2/lib/pkcs11_ext.so
7fa149d1a000-7fa149d4a000 r-xp 00003000 00:4b 1342998                    /home/lars/.rvm/gems/ruby-2.7.2/gems/pkcs11-0.3.2/lib/pkcs11_ext.so
7fa149d4a000-7fa149d58000 r--p 00033000 00:4b 1342998                    /home/lars/.rvm/gems/ruby-2.7.2/gems/pkcs11-0.3.2/lib/pkcs11_ext.so
7fa149d58000-7fa149d59000 r--p 00040000 00:4b 1342998                    /home/lars/.rvm/gems/ruby-2.7.2/gems/pkcs11-0.3.2/lib/pkcs11_ext.so
7fa149d59000-7fa149d5a000 rw-p 00041000 00:4b 1342998                    /home/lars/.rvm/gems/ruby-2.7.2/gems/pkcs11-0.3.2/lib/pkcs11_ext.so
7fa149d5a000-7fa149d5f000 r--p 00000000 00:4b 1342544                    /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi_c.so
7fa149d5f000-7fa149d77000 r-xp 00005000 00:4b 1342544                    /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi_c.so
7fa149d77000-7fa149d7e000 r--p 0001d000 00:4b 1342544                    /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi_c.so
7fa149d7e000-7fa149d7f000 r--p 00023000 00:4b 1342544                    /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi_c.so
7fa149d7f000-7fa149d80000 rw-p 00024000 00:4b 1342544                    /home/lars/.rvm/gems/ruby-2.7.2/gems/ffi-1.13.1/lib/ffi_c.so
7fa149d80000-7fa149d81000 ---p 00000000 00:00 0 
7fa149d81000-7fa149e22000 rw-p 00000000 00:00 0 
7fa149e22000-7fa149e23000 ---p 00000000 00:00 0 
7fa149e23000-7fa149ec4000 rw-p 00000000 00:00 0 
7fa149ec4000-7fa149ec5000 ---p 00000000 00:00 0 
7fa149ec5000-7fa149f66000 rw-p 00000000 00:00 0 
7fa149f66000-7fa149f67000 ---p 00000000 00:00 0 
7fa149f67000-7fa14a008000 rw-p 00000000 00:00 0 
7fa14a008000-7fa14a009000 ---p 00000000 00:00 0 
7fa14a009000-7fa14a0aa000 rw-p 00000000 00:00 0 
7fa14a0aa000-7fa14a0ab000 ---p 00000000 00:00 0 
7fa14a0ab000-7fa14a14c000 rw-p 00000000 00:00 0 
7fa14a14c000-7fa14a14d000 ---p 00000000 00:00 0 
7fa14a14d000-7fa14a1ee000 rw-p 00000000 00:00 0 
7fa14a1ee000-7fa14a1ef000 ---p 00000000 00:00 0 
7fa14a1ef000-7fa14a290000 rw-p 00000000 00:00 0 
7fa14a290000-7fa14a291000 ---p 00000000 00:00 0 
7fa14a291000-7fa14a332000 rw-p 00000000 00:00 0 
7fa14a332000-7fa14a333000 ---p 00000000 00:00 0 
7fa14a333000-7fa14a3d4000 rw-p 00000000 00:00 0 
7fa14a3d4000-7fa14a3d5000 ---p 00000000 00:00 0 
7fa14a3d5000-7fa14a476000 rw-p 00000000 00:00 0 
7fa14a476000-7fa14a477000 ---p 00000000 00:00 0 
7fa14a477000-7fa14a518000 rw-p 00000000 00:00 0 
7fa14a518000-7fa14a519000 ---p 00000000 00:00 0 
7fa14a519000-7fa14a5ba000 rw-p 00000000 00:00 0 
7fa14a5ba000-7fa14a5bb000 ---p 00000000 00:00 0 
7fa14a5bb000-7fa14a65c000 rw-p 00000000 00:00 0 
7fa14a65c000-7fa14a65d000 ---p 00000000 00:00 0 
7fa14a65d000-7fa14a6fe000 rw-p 00000000 00:00 0 
7fa14a6fe000-7fa14a6ff000 ---p 00000000 00:00 0 
7fa14a6ff000-7fa14a7a0000 rw-p 00000000 00:00 0 
7fa14a7a0000-7fa14a7a1000 ---p 00000000 00:00 0 
7fa14a7a1000-7fa14a842000 rw-p 00000000 00:00 0 
7fa14a842000-7fa14a843000 ---p 00000000 00:00 0 
7fa14a843000-7fa14a8e4000 rw-p 00000000 00:00 0 
7fa14a8e4000-7fa14a8e5000 ---p 00000000 00:00 0 
7fa14a8e5000-7fa14a986000 rw-p 00000000 00:00 0 
7fa14a986000-7fa14a987000 ---p 00000000 00:00 0 
7fa14a987000-7fa14aa28000 rw-p 00000000 00:00 0 
7fa14aa28000-7fa14aa29000 ---p 00000000 00:00 0 
7fa14aa29000-7fa14aaca000 rw-p 00000000 00:00 0 
7fa14aaca000-7fa14aacb000 ---p 00000000 00:00 0 
7fa14aacb000-7fa14ab6c000 rw-p 00000000 00:00 0 
7fa14ab6c000-7fa14ab6d000 ---p 00000000 00:00 0 
7fa14ab6d000-7fa14ac0e000 rw-p 00000000 00:00 0 
7fa14ac0e000-7fa14ac0f000 ---p 00000000 00:00 0 
7fa14ac0f000-7fa14acb0000 rw-p 00000000 00:00 0 
7fa14acb0000-7fa14acb1000 ---p 00000000 00:00 0 
7fa14acb1000-7fa14ad52000 rw-p 00000000 00:00 0 
7fa14ad52000-7fa14ad53000 ---p 00000000 00:00 0 
7fa14ad53000-7fa14adf4000 rw-p 00000000 00:00 0 
7fa14adf4000-7fa14adf5000 ---p 00000000 00:00 0 
7fa14adf5000-7fa14ae96000 rw-p 00000000 00:00 0 
7fa14ae96000-7fa14ae97000 ---p 00000000 00:00 0 
7fa14ae97000-7fa14af38000 rw-p 00000000 00:00 0 
7fa14af38000-7fa14af39000 ---p 00000000 00:00 0 
7fa14af39000-7fa14afda000 rw-p 00000000 00:00 0 
7fa14afda000-7fa14afdb000 ---p 00000000 00:00 0 
7fa14afdb000-7fa14b07c000 rw-p 00000000 00:00 0 
7fa14b07c000-7fa14b07d000 ---p 00000000 00:00 0 
7fa14b07d000-7fa14b11e000 rw-p 00000000 00:00 0 
7fa14b11e000-7fa14b11f000 ---p 00000000 00:00 0 
7fa14b11f000-7fa14d32b000 rw-p 00000000 00:00 0 
7fa14d32b000-7fa14d8f5000 r--p 00000000 103:07 1837176                   /usr/lib/locale/locale-archive
7fa14d8f5000-7fa14d8f7000 rw-p 00000000 00:00 0 
7fa14d8f7000-7fa14d906000 r--p 00000000 103:07 7078820                   /lib/x86_64-linux-gnu/libm-2.31.so
7fa14d906000-7fa14d9ad000 r-xp 0000f000 103:07 7078820                   /lib/x86_64-linux-gnu/libm-2.31.so
7fa14d9ad000-7fa14da44000 r--p 000b6000 103:07 7078820                   /lib/x86_64-linux-gnu/libm-2.31.so
7fa14da44000-7fa14da45000 r--p 0014c000 103:07 7078820                   /lib/x86_64-linux-gnu/libm-2.31.so
7fa14da45000-7fa14da46000 rw-p 0014d000 103:07 7078820                   /lib/x86_64-linux-gnu/libm-2.31.so
7fa14da46000-7fa14da48000 r--p 00000000 103:07 7078115                   /lib/x86_64-linux-gnu/libcrypt.so.1.1.0
7fa14da48000-7fa14da5d000 r-xp 00002000 103:07 7078115                   /lib/x86_64-linux-gnu/libcrypt.so.1.1.0
7fa14da5d000-7fa14da77000 r--p 00017000 103:07 7078115                   /lib/x86_64-linux-gnu/libcrypt.so.1.1.0
7fa14da77000-7fa14da78000 r--p 00030000 103:07 7078115                   /lib/x86_64-linux-gnu/libcrypt.so.1.1.0
7fa14da78000-7fa14da79000 rw-p 00031000 103:07 7078115                   /lib/x86_64-linux-gnu/libcrypt.so.1.1.0
7fa14da79000-7fa14da81000 rw-p 00000000 00:00 0 
7fa14da81000-7fa14da82000 r--p 00000000 103:07 7078225                   /lib/x86_64-linux-gnu/libdl-2.31.so
7fa14da82000-7fa14da84000 r-xp 00001000 103:07 7078225                   /lib/x86_64-linux-gnu/libdl-2.31.so
7fa14da84000-7fa14da85000 r--p 00003000 103:07 7078225                   /lib/x86_64-linux-gnu/libdl-2.31.so
7fa14da85000-7fa14da86000 r--p 00003000 103:07 7078225                   /lib/x86_64-linux-gnu/libdl-2.31.so
7fa14da86000-7fa14da87000 rw-p 00004000 103:07 7078225                   /lib/x86_64-linux-gnu/libdl-2.31.so
7fa14da87000-7fa14da89000 rw-p 00000000 00:00 0 
7fa14da89000-7fa14da93000 r--p 00000000 103:07 1838832                   /usr/lib/x86_64-linux-gnu/libgmp.so.10.4.0
7fa14da93000-7fa14daf3000 r-xp 0000a000 103:07 1838832                   /usr/lib/x86_64-linux-gnu/libgmp.so.10.4.0
7fa14daf3000-7fa14db0a000 r--p 0006a000 103:07 1838832                   /usr/lib/x86_64-linux-gnu/libgmp.so.10.4.0
7fa14db0a000-7fa14db0b000 ---p 00081000 103:07 1838832                   /usr/lib/x86_64-linux-gnu/libgmp.so.10.4.0
7fa14db0b000-7fa14db0c000 r--p 00081000 103:07 1838832                   /usr/lib/x86_64-linux-gnu/libgmp.so.10.4.0
7fa14db0c000-7fa14db0d000 rw-p 00082000 103:07 1838832                   /usr/lib/x86_64-linux-gnu/libgmp.so.10.4.0
7fa14db0d000-7fa14db10000 r--p 00000000 103:07 7079727                   /lib/x86_64-linux-gnu/librt-2.31.so
7fa14db10000-7fa14db14000 r-xp 00003000 103:07 7079727                   /lib/x86_64-linux-gnu/librt-2.31.so
7fa14db14000-7fa14db15000 r--p 00007000 103:07 7079727                   /lib/x86_64-linux-gnu/librt-2.31.so
7fa14db15000-7fa14db16000 ---p 00008000 103:07 7079727                   /lib/x86_64-linux-gnu/librt-2.31.so
7fa14db16000-7fa14db17000 r--p 00008000 103:07 7079727                   /lib/x86_64-linux-gnu/librt-2.31.so
7fa14db17000-7fa14db18000 rw-p 00009000 103:07 7079727                   /lib/x86_64-linux-gnu/librt-2.31.so
7fa14db18000-7fa14db1f000 r--p 00000000 103:07 7079705                   /lib/x86_64-linux-gnu/libpthread-2.31.so
7fa14db1f000-7fa14db30000 r-xp 00007000 103:07 7079705                   /lib/x86_64-linux-gnu/libpthread-2.31.so
7fa14db30000-7fa14db35000 r--p 00018000 103:07 7079705                   /lib/x86_64-linux-gnu/libpthread-2.31.so
7fa14db35000-7fa14db36000 r--p 0001c000 103:07 7079705                   /lib/x86_64-linux-gnu/libpthread-2.31.so
7fa14db36000-7fa14db37000 rw-p 0001d000 103:07 7079705                   /lib/x86_64-linux-gnu/libpthread-2.31.so
7fa14db37000-7fa14db3b000 rw-p 00000000 00:00 0 
7fa14db3b000-7fa14db3d000 r--p 00000000 103:07 7078096                   /lib/x86_64-linux-gnu/libz.so.1.2.11
7fa14db3d000-7fa14db4e000 r-xp 00002000 103:07 7078096                   /lib/x86_64-linux-gnu/libz.so.1.2.11
7fa14db4e000-7fa14db54000 r--p 00013000 103:07 7078096                   /lib/x86_64-linux-gnu/libz.so.1.2.11
7fa14db54000-7fa14db55000 ---p 00019000 103:07 7078096                   /lib/x86_64-linux-gnu/libz.so.1.2.11
7fa14db55000-7fa14db56000 r--p 00019000 103:07 7078096                   /lib/x86_64-linux-gnu/libz.so.1.2.11
7fa14db56000-7fa14db57000 rw-p 0001a000 103:07 7078096                   /lib/x86_64-linux-gnu/libz.so.1.2.11
7fa14db57000-7fa14db7c000 r--p 00000000 103:07 7078220                   /lib/x86_64-linux-gnu/libc-2.31.so
7fa14db7c000-7fa14dcf4000 r-xp 00025000 103:07 7078220                   /lib/x86_64-linux-gnu/libc-2.31.so
7fa14dcf4000-7fa14dd3e000 r--p 0019d000 103:07 7078220                   /lib/x86_64-linux-gnu/libc-2.31.so
7fa14dd3e000-7fa14dd3f000 ---p 001e7000 103:07 7078220                   /lib/x86_64-linux-gnu/libc-2.31.so
7fa14dd3f000-7fa14dd42000 r--p 001e7000 103:07 7078220                   /lib/x86_64-linux-gnu/libc-2.31.so
7fa14dd42000-7fa14dd45000 rw-p 001ea000 103:07 7078220                   /lib/x86_64-linux-gnu/libc-2.31.so
7fa14dd45000-7fa14dd49000 rw-p 00000000 00:00 0 
7fa14dd59000-7fa14dd5b000 r--p 00000000 103:07 1835309                   /usr/lib/x86_64-linux-gnu/libffi.so.7.1.0
7fa14dd5b000-7fa14dd61000 r-xp 00002000 103:07 1835309                   /usr/lib/x86_64-linux-gnu/libffi.so.7.1.0
7fa14dd61000-7fa14dd62000 r--p 00008000 103:07 1835309                   /usr/lib/x86_64-linux-gnu/libffi.so.7.1.0
7fa14dd62000-7fa14dd63000 ---p 00009000 103:07 1835309                   /usr/lib/x86_64-linux-gnu/libffi.so.7.1.0
7fa14dd63000-7fa14dd64000 r--p 00009000 103:07 1835309                   /usr/lib/x86_64-linux-gnu/libffi.so.7.1.0
7fa14dd64000-7fa14dd65000 rw-p 0000a000 103:07 1835309                   /usr/lib/x86_64-linux-gnu/libffi.so.7.1.0
7fa14dd65000-7fa14dd66000 r--p 00000000 00:4b 1341234                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/monitor.so
7fa14dd66000-7fa14dd67000 r-xp 00001000 00:4b 1341234                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/monitor.so
7fa14dd67000-7fa14dd68000 r--p 00002000 00:4b 1341234                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/monitor.so
7fa14dd68000-7fa14dd69000 r--p 00002000 00:4b 1341234                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/monitor.so
7fa14dd69000-7fa14dd6a000 rw-p 00003000 00:4b 1341234                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/monitor.so
7fa14dd6a000-7fa14dd6b000 r--p 00000000 00:4b 1341281                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/enc/trans/transdb.so
7fa14dd6b000-7fa14dd6d000 r-xp 00001000 00:4b 1341281                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/enc/trans/transdb.so
7fa14dd6d000-7fa14dd6e000 r--p 00003000 00:4b 1341281                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/enc/trans/transdb.so
7fa14dd6e000-7fa14dd6f000 r--p 00003000 00:4b 1341281                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/enc/trans/transdb.so
7fa14dd6f000-7fa14dd70000 rw-p 00004000 00:4b 1341281                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/enc/trans/transdb.so
7fa14dd70000-7fa14dd71000 r--p 00000000 00:4b 1341296                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/enc/encdb.so
7fa14dd71000-7fa14dd72000 r-xp 00001000 00:4b 1341296                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/enc/encdb.so
7fa14dd72000-7fa14dd73000 r--p 00002000 00:4b 1341296                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/enc/encdb.so
7fa14dd73000-7fa14dd74000 r--p 00002000 00:4b 1341296                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/enc/encdb.so
7fa14dd74000-7fa14dd75000 rw-p 00003000 00:4b 1341296                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/x86_64-linux/enc/encdb.so
7fa14dd75000-7fa14dda2000 r--p 00000000 00:4b 1339729                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/libruby.so.2.7.2
7fa14dda2000-7fa14e02e000 r-xp 0002d000 00:4b 1339729                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/libruby.so.2.7.2
7fa14e02e000-7fa14e125000 r--p 002b9000 00:4b 1339729                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/libruby.so.2.7.2
7fa14e125000-7fa14e12b000 r--p 003af000 00:4b 1339729                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/libruby.so.2.7.2
7fa14e12b000-7fa14e12e000 rw-p 003b5000 00:4b 1339729                    /home/lars/.rvm/rubies/ruby-2.7.2/lib/libruby.so.2.7.2
7fa14e12e000-7fa14e14b000 rw-p 00000000 00:00 0 
7fa14e14b000-7fa14e14c000 r--p 00000000 103:07 7078210                   /lib/x86_64-linux-gnu/ld-2.31.so
7fa14e14c000-7fa14e16f000 r-xp 00001000 103:07 7078210                   /lib/x86_64-linux-gnu/ld-2.31.so
7fa14e16f000-7fa14e177000 r--p 00024000 103:07 7078210                   /lib/x86_64-linux-gnu/ld-2.31.so
7fa14e178000-7fa14e179000 r--p 0002c000 103:07 7078210                   /lib/x86_64-linux-gnu/ld-2.31.so
7fa14e179000-7fa14e17a000 rw-p 0002d000 103:07 7078210                   /lib/x86_64-linux-gnu/ld-2.31.so
7fa14e17a000-7fa14e17b000 rw-p 00000000 00:00 0 
7fffe04f8000-7fffe0cf7000 rw-p 00000000 00:00 0                          [stack]
7fffe0dbb000-7fffe0dbe000 r--p 00000000 00:00 0                          [vvar]
7fffe0dbe000-7fffe0dbf000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0                  [vsyscall]


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