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authorBjörn Gustavsson <[email protected]>2017-02-27 16:12:41 +0100
committerBjörn Gustavsson <[email protected]>2017-02-28 09:52:28 +0100
commite06dc58a9db38ad349143629f4ba7411275183ab (patch)
tree261e599f9db5ffa3919c6152a2525c429fe694b0 /lib
parent45a64bda7c605bb5effca0085e9df6f56ddba24a (diff)
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zip: Eliminate leak of open file after crash
Make sure that zip:extract() and zip:create() closes the zip file if there is an error. ERL-349
Diffstat (limited to 'lib')
-rw-r--r--lib/stdlib/src/zip.erl28
-rw-r--r--lib/stdlib/test/zip_SUITE.erl36
2 files changed, 54 insertions, 10 deletions
diff --git a/lib/stdlib/src/zip.erl b/lib/stdlib/src/zip.erl
index 31438ae36b..fadf96146e 100644
--- a/lib/stdlib/src/zip.erl
+++ b/lib/stdlib/src/zip.erl
@@ -368,9 +368,12 @@ do_unzip(F, Options) ->
{Info, In1} = get_central_dir(In0, RawIterator, Input),
%% get rid of zip-comment
Z = zlib:open(),
- Files = get_z_files(Info, Z, In1, Opts, []),
- zlib:close(Z),
- Input(close, In1),
+ Files = try
+ get_z_files(Info, Z, In1, Opts, [])
+ after
+ zlib:close(Z),
+ Input(close, In1)
+ end,
{ok, Files}.
%% Iterate over all files in a zip archive
@@ -447,11 +450,20 @@ do_zip(F, Files, Options) ->
#zip_opts{output = Output, open_opts = OpO} = Opts,
Out0 = Output({open, F, OpO}, []),
Z = zlib:open(),
- {Out1, LHS, Pos} = put_z_files(Files, Z, Out0, 0, Opts, []),
- zlib:close(Z),
- Out2 = put_central_dir(LHS, Pos, Out1, Opts),
- Out3 = Output({close, F}, Out2),
- {ok, Out3}.
+ try
+ {Out1, LHS, Pos} = put_z_files(Files, Z, Out0, 0, Opts, []),
+ zlib:close(Z),
+ Out2 = put_central_dir(LHS, Pos, Out1, Opts),
+ Out3 = Output({close, F}, Out2),
+ {ok, Out3}
+ catch
+ C:R ->
+ Stk = erlang:get_stacktrace(),
+ zlib:close(Z),
+ Output({close, F}, Out0),
+ erlang:raise(C, R, Stk)
+ end.
+
%% List zip directory contents
%%
diff --git a/lib/stdlib/test/zip_SUITE.erl b/lib/stdlib/test/zip_SUITE.erl
index 7d90795c9e..f0feda217a 100644
--- a/lib/stdlib/test/zip_SUITE.erl
+++ b/lib/stdlib/test/zip_SUITE.erl
@@ -27,7 +27,7 @@
openzip_api/1, zip_api/1, open_leak/1, unzip_jar/1,
unzip_traversal_exploit/1,
compress_control/1,
- foldl/1]).
+ foldl/1,fd_leak/1]).
-include_lib("common_test/include/ct.hrl").
-include_lib("kernel/include/file.hrl").
@@ -40,7 +40,7 @@ all() ->
unzip_to_binary, zip_to_binary, unzip_options,
zip_options, list_dir_options, aliases, openzip_api,
zip_api, open_leak, unzip_jar, compress_control, foldl,
- unzip_traversal_exploit].
+ unzip_traversal_exploit,fd_leak].
groups() ->
[].
@@ -882,3 +882,35 @@ foldl(Config) ->
{error, enoent} = zip:foldl(ZipFun, [], File),
ok.
+
+fd_leak(Config) ->
+ ok = file:set_cwd(proplists:get_value(priv_dir, Config)),
+ DataDir = proplists:get_value(data_dir, Config),
+ Name = filename:join(DataDir, "bad_file_header.zip"),
+ BadExtract = fun() ->
+ {error,bad_file_header} = zip:extract(Name),
+ ok
+ end,
+ do_fd_leak(BadExtract, 1),
+
+ BadCreate = fun() ->
+ {error,enoent} = zip:zip("failed.zip",
+ ["none"]),
+ ok
+ end,
+ do_fd_leak(BadCreate, 1),
+
+ ok.
+
+do_fd_leak(_Bad, 10000) ->
+ ok;
+do_fd_leak(Bad, N) ->
+ try Bad() of
+ ok ->
+ do_fd_leak(Bad, N + 1)
+ catch
+ C:R ->
+ Stk = erlang:get_stacktrace(),
+ io:format("Bad error after ~p attempts\n", [N]),
+ erlang:raise(C, R, Stk)
+ end.