pf+arg args heap overflow

[zonkzonk]

,echo "pfa  %1$*269168516$x %1073741824\n" | /usr/bin/r2 -e asm.arch=arm -e asm.bits=32 -qn -
=================================================================
==16477==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6030000112db at pc 0x7f783a2ec258 bp 0x7ffe7cb29870 sp 0x7ffe7cb29018
READ of size 27 at 0x6030000112db thread T0
    #0 0x7f783a2ec257 in __asan_memmove (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x8d257)
    #1 0x7f7834d58968 in r_str_word_set0_stack /home/sk/radare2/libr/util/str.c:422
    #2 0x7f7834dacf04 in r_print_format_struct_size /home/sk/radare2/libr/util/p_format.c:1247
    #3 0x7f7839db25a3 in cmd_print_format /home/sk/radare2/libr/core/cmd_print.c:757
    #4 0x7f7839dcbdee in cmd_print /home/sk/radare2/libr/core/cmd_print.c:4216
    #5 0x7f7839e7b689 in r_cmd_call /home/sk/radare2/libr/core/cmd_api.c:226
    #6 0x7f7839dfc671 in r_core_cmd_subst_i /home/sk/radare2/libr/core/cmd.c:2080
    #7 0x7f7839df6ef4 in r_core_cmd_subst /home/sk/radare2/libr/core/cmd.c:1357
    #8 0x7f7839e00843 in r_core_cmd /home/sk/radare2/libr/core/cmd.c:2636
    #9 0x7f7839d1188d in r_core_prompt_exec /home/sk/radare2/libr/core/core.c:1867
    #10 0x561a0ff5c606 in main /home/sk/radare2/binr/radare2/radare2.c:1132
    #11 0x7f7834977abf in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20abf)
    #12 0x561a0ff57308 in _start (/usr/bin/radare2+0x6308)

0x6030000112db is located 0 bytes to the right of 27-byte region [0x6030000112c0,0x6030000112db)
allocated by thread T0 here:
    #0 0x7f783a2c176f in strdup (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x6276f)
    #1 0x7f7834dacd57 in r_print_format_struct_size /home/sk/radare2/libr/util/p_format.c:1229
    #2 0x7f7839db25a3 in cmd_print_format /home/sk/radare2/libr/core/cmd_print.c:757
    #3 0x7f7839dcbdee in cmd_print /home/sk/radare2/libr/core/cmd_print.c:4216
    #4 0x7f7839e7b689 in r_cmd_call /home/sk/radare2/libr/core/cmd_api.c:226
    #5 0x7f7839dfc671 in r_core_cmd_subst_i /home/sk/radare2/libr/core/cmd.c:2080
    #6 0x7f7839df6ef4 in r_core_cmd_subst /home/sk/radare2/libr/core/cmd.c:1357
    #7 0x7f7839e00843 in r_core_cmd /home/sk/radare2/libr/core/cmd.c:2636
    #8 0x7f7839d1188d in r_core_prompt_exec /home/sk/radare2/libr/core/core.c:1867
    #9 0x561a0ff5c606 in main /home/sk/radare2/binr/radare2/radare2.c:1132
    #10 0x7f7834977abf in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20abf)

SUMMARY: AddressSanitizer: heap-buffer-overflow ??:0 __asan_memmove
Shadow bytes around the buggy address:
  0x0c067fffa200: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fffa210: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fffa220: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fffa230: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c067fffa240: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c067fffa250: fa fa fa fa fa fa fa fa 00 00 00[03]fa fa 00 00
  0x0c067fffa260: 00 05 fa fa 00 00 00 06 fa fa 00 00 00 07 fa fa
  0x0c067fffa270: 00 00 00 07 fa fa 00 00 00 07 fa fa 00 00 00 07
  0x0c067fffa280: fa fa fd fd fd fa fa fa 00 00 00 fa fa fa fd fd
  0x0c067fffa290: fd fa fa fa fd fd fd fa fa fa fd fd fd fa fa fa
  0x0c067fffa2a0: fd fd fd fa fa fa fd fd fd fa fa fa fd fd fd fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Heap right redzone:      fb
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack partial redzone:   f4
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
==16477==ABORTING

[zonkzonk]

,r2 -v
radare2 1.2.0-git 13631 @ linux-x86-64 git.1.2.0-git-65-g5fa9601
commit: 5fa9601 build: 2017-01-29

[zonkzonk]

Thanks alvarofe ! Can't reproduce