Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Invalid read in array_copy and mrb_ary_unshift_m #4808

Closed
dkasak opened this issue Nov 7, 2019 · 0 comments
Closed

Invalid read in array_copy and mrb_ary_unshift_m #4808

dkasak opened this issue Nov 7, 2019 · 0 comments

Comments

@dkasak
Copy link

dkasak commented Nov 7, 2019

The following input causes an invalid read on latest master (c10e191):

*z = Array.new.cycle.to_s
z.prepend *(z.prepend (z.prepend (z.prepend)).count(""))

Valgrind report:

==561369== Memcheck, a memory error detector
==561369== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==561369== Using Valgrind-3.15.0 and LibVEX; rerun with -h for copyright info
==561369== Command: mruby 17d4e0422f76f236c460d02fd0a34b6a55c3aafa
==561369== 
17d4e0422f76f236c460d02fd0a34b6a55c3aafa:2:11: warning: '*' interpreted as argument prefix
==561369== Invalid read of size 16
==561369==    at 0x12B958: array_copy (array.c:78)
==561369==    by 0x12B958: mrb_ary_unshift_m (array.c:640)
==561369==    by 0x12393D: mrb_vm_exec (vm.c:1444)
==561369==    by 0x128A43: mrb_vm_run (vm.c:947)
==561369==    by 0x14E44E: mrb_load_exec (parse.y:6339)
==561369==    by 0x10DC3E: main (mruby.c:270)
==561369==  Address 0x4ce5920 is 0 bytes inside a block of size 64 free'd
==561369==    at 0x483AD7B: realloc (vg_replace_malloc.c:836)
==561369==    by 0x131004: mrb_realloc_simple (gc.c:209)
==561369==    by 0x131004: mrb_realloc (gc.c:223)
==561369==    by 0x12A47F: ary_expand_capa (array.c:224)
==561369==    by 0x12BA5A: mrb_ary_unshift_m (array.c:636)
==561369==    by 0x12393D: mrb_vm_exec (vm.c:1444)
==561369==    by 0x128A43: mrb_vm_run (vm.c:947)
==561369==    by 0x14E44E: mrb_load_exec (parse.y:6339)
==561369==    by 0x10DC3E: main (mruby.c:270)
==561369==  Block was alloc'd at
==561369==    at 0x48386AF: malloc (vg_replace_malloc.c:308)
==561369==    by 0x483ADE7: realloc (vg_replace_malloc.c:836)
==561369==    by 0x131478: mrb_realloc_simple (gc.c:209)
==561369==    by 0x131478: mrb_realloc (gc.c:223)
==561369==    by 0x131478: mrb_malloc (gc.c:245)
==561369==    by 0x12A4AA: ary_expand_capa (array.c:215)
==561369==    by 0x12BA5A: mrb_ary_unshift_m (array.c:636)
==561369==    by 0x12393D: mrb_vm_exec (vm.c:1444)
==561369==    by 0x128A43: mrb_vm_run (vm.c:947)
==561369==    by 0x14E44E: mrb_load_exec (parse.y:6339)
==561369==    by 0x10DC3E: main (mruby.c:270)
==561369== 
==561369== Invalid read of size 16
==561369==    at 0x12B969: array_copy (array.c:77)
==561369==    by 0x12B969: mrb_ary_unshift_m (array.c:640)
==561369==    by 0x12393D: mrb_vm_exec (vm.c:1444)
==561369==    by 0x128A43: mrb_vm_run (vm.c:947)
==561369==    by 0x14E44E: mrb_load_exec (parse.y:6339)
==561369==    by 0x10DC3E: main (mruby.c:270)
==561369==  Address 0x4ce5940 is 32 bytes inside a block of size 64 free'd
==561369==    at 0x483AD7B: realloc (vg_replace_malloc.c:836)
==561369==    by 0x131004: mrb_realloc_simple (gc.c:209)
==561369==    by 0x131004: mrb_realloc (gc.c:223)
==561369==    by 0x12A47F: ary_expand_capa (array.c:224)
==561369==    by 0x12BA5A: mrb_ary_unshift_m (array.c:636)
==561369==    by 0x12393D: mrb_vm_exec (vm.c:1444)
==561369==    by 0x128A43: mrb_vm_run (vm.c:947)
==561369==    by 0x14E44E: mrb_load_exec (parse.y:6339)
==561369==    by 0x10DC3E: main (mruby.c:270)
==561369==  Block was alloc'd at
==561369==    at 0x48386AF: malloc (vg_replace_malloc.c:308)
==561369==    by 0x483ADE7: realloc (vg_replace_malloc.c:836)
==561369==    by 0x131478: mrb_realloc_simple (gc.c:209)
==561369==    by 0x131478: mrb_realloc (gc.c:223)
==561369==    by 0x131478: mrb_malloc (gc.c:245)
==561369==    by 0x12A4AA: ary_expand_capa (array.c:215)
==561369==    by 0x12BA5A: mrb_ary_unshift_m (array.c:636)
==561369==    by 0x12393D: mrb_vm_exec (vm.c:1444)
==561369==    by 0x128A43: mrb_vm_run (vm.c:947)
==561369==    by 0x14E44E: mrb_load_exec (parse.y:6339)
==561369==    by 0x10DC3E: main (mruby.c:270)
==561369== 
==561369== Invalid read of size 4
==561369==    at 0x12B9AB: mrb_ary_unshift_m (array.c:643)
==561369==    by 0x12393D: mrb_vm_exec (vm.c:1444)
==561369==    by 0x128A43: mrb_vm_run (vm.c:947)
==561369==    by 0x14E44E: mrb_load_exec (parse.y:6339)
==561369==    by 0x10DC3E: main (mruby.c:270)
==561369==  Address 0x4ce5948 is 40 bytes inside a block of size 64 free'd
==561369==    at 0x483AD7B: realloc (vg_replace_malloc.c:836)
==561369==    by 0x131004: mrb_realloc_simple (gc.c:209)
==561369==    by 0x131004: mrb_realloc (gc.c:223)
==561369==    by 0x12A47F: ary_expand_capa (array.c:224)
==561369==    by 0x12BA5A: mrb_ary_unshift_m (array.c:636)
==561369==    by 0x12393D: mrb_vm_exec (vm.c:1444)
==561369==    by 0x128A43: mrb_vm_run (vm.c:947)
==561369==    by 0x14E44E: mrb_load_exec (parse.y:6339)
==561369==    by 0x10DC3E: main (mruby.c:270)
==561369==  Block was alloc'd at
==561369==    at 0x48386AF: malloc (vg_replace_malloc.c:308)
==561369==    by 0x483ADE7: realloc (vg_replace_malloc.c:836)
==561369==    by 0x131478: mrb_realloc_simple (gc.c:209)
==561369==    by 0x131478: mrb_realloc (gc.c:223)
==561369==    by 0x131478: mrb_malloc (gc.c:245)
==561369==    by 0x12A4AA: ary_expand_capa (array.c:215)
==561369==    by 0x12BA5A: mrb_ary_unshift_m (array.c:636)
==561369==    by 0x12393D: mrb_vm_exec (vm.c:1444)
==561369==    by 0x128A43: mrb_vm_run (vm.c:947)
==561369==    by 0x14E44E: mrb_load_exec (parse.y:6339)
==561369==    by 0x10DC3E: main (mruby.c:270)
==561369== 
==561369== Invalid read of size 8
==561369==    at 0x12BA08: mrb_ary_unshift_m (array.c:643)
==561369==    by 0x12393D: mrb_vm_exec (vm.c:1444)
==561369==    by 0x128A43: mrb_vm_run (vm.c:947)
==561369==    by 0x14E44E: mrb_load_exec (parse.y:6339)
==561369==    by 0x10DC3E: main (mruby.c:270)
==561369==  Address 0x4ce5940 is 32 bytes inside a block of size 64 free'd
==561369==    at 0x483AD7B: realloc (vg_replace_malloc.c:836)
==561369==    by 0x131004: mrb_realloc_simple (gc.c:209)
==561369==    by 0x131004: mrb_realloc (gc.c:223)
==561369==    by 0x12A47F: ary_expand_capa (array.c:224)
==561369==    by 0x12BA5A: mrb_ary_unshift_m (array.c:636)
==561369==    by 0x12393D: mrb_vm_exec (vm.c:1444)
==561369==    by 0x128A43: mrb_vm_run (vm.c:947)
==561369==    by 0x14E44E: mrb_load_exec (parse.y:6339)
==561369==    by 0x10DC3E: main (mruby.c:270)
==561369==  Block was alloc'd at
==561369==    at 0x48386AF: malloc (vg_replace_malloc.c:308)
==561369==    by 0x483ADE7: realloc (vg_replace_malloc.c:836)
==561369==    by 0x131478: mrb_realloc_simple (gc.c:209)
==561369==    by 0x131478: mrb_realloc (gc.c:223)
==561369==    by 0x131478: mrb_malloc (gc.c:245)
==561369==    by 0x12A4AA: ary_expand_capa (array.c:215)
==561369==    by 0x12BA5A: mrb_ary_unshift_m (array.c:636)
==561369==    by 0x12393D: mrb_vm_exec (vm.c:1444)
==561369==    by 0x128A43: mrb_vm_run (vm.c:947)
==561369==    by 0x14E44E: mrb_load_exec (parse.y:6339)
==561369==    by 0x10DC3E: main (mruby.c:270)
==561369== 
==561369== 
==561369== HEAP SUMMARY:
==561369==     in use at exit: 0 bytes in 0 blocks
==561369==   total heap usage: 3,072 allocs, 3,072 frees, 333,033 bytes allocated
==561369== 
==561369== All heap blocks were freed -- no leaks are possible
==561369== 
==561369== For lists of detected and suppressed errors, rerun with: -s
==561369== ERROR SUMMARY: 8 errors from 4 contexts (suppressed: 0 from 0)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

No branches or pull requests

1 participant