[erlang-bugs] a crypto function call crashes VM

Erik Søe Sørensen <>
Thu Aug 25 18:58:21 CEST 2011


Simpler version:
  crypto:sha_update(list_to_binary(lists:seq(1,96)).

Boundary:
6> crypto:sha_update(list_to_binary([0 || _ <- lists:seq(1,96)]), "x").    
<<0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,
  120,...>>
7> crypto:sha_update(list_to_binary([1 || _ <- lists:seq(1,96)]), "x").
Segmentation fault

(Probably part of the binary is interpreted as a pointer, except when NULL.)

________________________________________
Fra:  [] På vegne af Kenji Rikitake []
Sendt: 25. august 2011 18:37
Til: 
Emne: [erlang-bugs] a crypto function call crashes VM

Enter the following code to erl shell:

crypto:sha_update(
  list_to_binary(lists:reverse(binary_to_list(crypto:sha_init()))), "hello").

Segmentation fault occurs and VM crashed with the core dump.

This is originally reported at
https://twitter.com/#!/szktty/status/106761685284564992
by Tetsuya Suzuki (Twitter: @szktty)
(Tweet in Japanese but the code is the same as shown here)

Verified on
R14B03 running on FreeBSD 8.2-RELEASE x86
and R14B03 running on RHEL v4 x86_64
for Kyoto University Supercomputer Thin Cluster.

Kenji Rikitake
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