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| author | Raimo Niskanen <[email protected]> | 2015-02-18 10:11:53 +0100 |
|---|---|---|
| committer | Raimo Niskanen <[email protected]> | 2015-02-18 10:11:53 +0100 |
| commit | cb5e43872ee5521f75ff66560baccd5562ce93b1 (patch) | |
| tree | 83d9a1a14a36e173c81b69d482e4596d61a2edeb /lib/kernel | |
| parent | 06b359e3c126804045b9b14852d14b46c2e1fee9 (diff) | |
| download | otp-cb5e43872ee5521f75ff66560baccd5562ce93b1.tar.gz otp-cb5e43872ee5521f75ff66560baccd5562ce93b1.tar.bz2 otp-cb5e43872ee5521f75ff66560baccd5562ce93b1.zip | |
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/kernel')
| -rw-r--r-- | lib/kernel/src/inet.erl | 4 | ||||
| -rw-r--r-- | lib/kernel/test/inet_SUITE.erl | 19 |
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) -> |