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authorRaimo Niskanen <[email protected]>2015-02-18 10:11:53 +0100
committerRaimo Niskanen <[email protected]>2015-02-18 10:11:53 +0100
commitcb5e43872ee5521f75ff66560baccd5562ce93b1 (patch)
tree83d9a1a14a36e173c81b69d482e4596d61a2edeb /lib
parent06b359e3c126804045b9b14852d14b46c2e1fee9 (diff)
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Remove infinite loop in inet:gethostbyname_tm/4
An erroneous lookup option is needed to trigger the bug, and that can only enter the system from a parsed file e.g .inetrc. Pinpointed by Emil Holmström
Diffstat (limited to 'lib')
-rw-r--r--lib/kernel/src/inet.erl4
-rw-r--r--lib/kernel/test/inet_SUITE.erl19
2 files changed, 20 insertions, 3 deletions
diff --git a/lib/kernel/src/inet.erl b/lib/kernel/src/inet.erl
index 43bab8bcf0..ec2c350931 100644
--- a/lib/kernel/src/inet.erl
+++ b/lib/kernel/src/inet.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1997-2014. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2015. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
@@ -1070,7 +1070,7 @@ gethostbyname_tm(Name, Type, Timer, [wins|_]=Opts) ->
gethostbyname_tm_native(Name, Type, Timer, Opts);
gethostbyname_tm(Name, Type, Timer, [native|_]=Opts) ->
gethostbyname_tm_native(Name, Type, Timer, Opts);
-gethostbyname_tm(Name, Type, Timer, [_|_]=Opts) ->
+gethostbyname_tm(Name, Type, Timer, [_|Opts]) ->
gethostbyname_tm(Name, Type, Timer, Opts);
%% Make sure we always can look up our own hostname.
gethostbyname_tm(Name, Type, Timer, []) ->
diff --git a/lib/kernel/test/inet_SUITE.erl b/lib/kernel/test/inet_SUITE.erl
index d45dfc2173..849013ac79 100644
--- a/lib/kernel/test/inet_SUITE.erl
+++ b/lib/kernel/test/inet_SUITE.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1997-2014. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2015. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
@@ -36,6 +36,7 @@
gethostnative_parallell/1, cname_loop/1,
gethostnative_soft_restart/0, gethostnative_soft_restart/1,
gethostnative_debug_level/0, gethostnative_debug_level/1,
+ lookup_bad_search_option/1,
getif/1,
getif_ifr_name_overflow/1,getservbyname_overflow/1, getifaddrs/1,
parse_strict_address/1, simple_netns/1, simple_netns_open/1]).
@@ -52,6 +53,7 @@ all() ->
ipv4_to_ipv6, host_and_addr, {group, parse},
t_gethostnative, gethostnative_parallell, cname_loop,
gethostnative_debug_level, gethostnative_soft_restart,
+ lookup_bad_search_option,
getif, getif_ifr_name_overflow, getservbyname_overflow,
getifaddrs, parse_strict_address, simple_netns, simple_netns_open].
@@ -908,6 +910,21 @@ lookup_loop([H|Hs], Delay, Tag, Parent, Cnt, Hosts) ->
+lookup_bad_search_option(suite) ->
+ [];
+lookup_bad_search_option(doc) ->
+ ["Test lookup with erroneously configured lookup option (OTP-12133)"];
+lookup_bad_search_option(Config) when is_list(Config) ->
+ Db = inet_db,
+ %% The bad option can not enter through inet_db:set_lookup/1,
+ %% but through e.g .inetrc.
+ ets:insert(Db, {res_lookup,[lookup_bad_search_option]}),
+ {ok,Hostname} = inet:gethostname(),
+ {ok,_Hent} = inet:gethostbyname(Hostname), % Will hang loop for this bug
+ ok.
+
+
+
getif(suite) ->
[];
getif(doc) ->