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Posted to commits@subversion.apache.org by sv...@apache.org on 2015/03/12 05:01:17 UTC

svn commit: r1666079 - in /subversion/branches/1.8.x: ./ STATUS subversion/ subversion/libsvn_ra_serf/commit.c subversion/libsvn_repos/commit.c subversion/tests/libsvn_ra/ra-test.c

Author: svn-role
Date: Thu Mar 12 04:01:16 2015
New Revision: 1666079

URL: http://svn.apache.org/r1666079
Log:
Merge the 1.8.x-r1659867 branch:

 * ^/subversion/branches/1.8.x-r1659867
   Fix reproducable memory corruption and unneeded io errors on editor abort
   Justification:
     Reproducible double free(), which is undefined behaviour.  Details:
     .
     A SIGPIPE caused by cancelling a commit at the wrong time may cause
     the commit editor to return an error from editor->close_edit() which
     makes most code paths call editor->abort_edit(). But ra-local and ra-serf
     then still tried to access the original transaction which is already
     gone. Daniel Shahaf reported reproducable see double frees when using
     ra-local with fsfs. This fix makes calling abort safe (+- a NO-OP) after
     a successfull commit. A testcase is added showcasing this scenario.
   Notes:
     'svn import -mm | (sleep 2; cat)' followed by ^C at the right time was
     the reproduction.
   Branch:
     ^/subversion/branches/1.8.x-r1659867
   Votes:
     +1: danielsh (without r1660091, r1660097,
                   ra_serf part; looks good but I can't vouch for it)
     +1: philip, rhuijben, stsp

Modified:
    subversion/branches/1.8.x/   (props changed)
    subversion/branches/1.8.x/STATUS
    subversion/branches/1.8.x/subversion/   (props changed)
    subversion/branches/1.8.x/subversion/libsvn_ra_serf/commit.c
    subversion/branches/1.8.x/subversion/libsvn_repos/commit.c
    subversion/branches/1.8.x/subversion/tests/libsvn_ra/ra-test.c

Propchange: subversion/branches/1.8.x/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Thu Mar 12 04:01:16 2015
@@ -53,6 +53,7 @@
 /subversion/branches/1.8.x-r1644595:1644691-1659880
 /subversion/branches/1.8.x-r1646505:1659718-1660020
 /subversion/branches/1.8.x-r1646797:1646798-1659878
+/subversion/branches/1.8.x-r1659867:1659963-1666078
 /subversion/branches/1.8.x-r175-daemonize:1515866-1516020
 /subversion/branches/1.8.x-rm-external-dir:1600632-1615197
 /subversion/branches/1.8.x-serf-1.3+-windows:1517122-1533873
@@ -133,5 +134,5 @@
 /subversion/branches/uris-as-urls:1060426-1064427
 /subversion/branches/verify-at-commit:1462039-1462408
 /subversion/branches/wc-collate-path:1407642
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 ,1578853,1578875,1579274,1579429,1579588,1579684,1580626,1580650,1580832,1580867,1580872,1581296,1581305,1581315,1581430,1581810,1583580,1583977,1584342,1584576,1584592,1584745,1585686,1586052,1586255,1586352,1586467,1587511,1587946,1587968,1588772,1588778,1589184,1589188,1589360,1589460,1589486,1590212,1590751,1591123,1592014,1592034,1592987,1593992,1594156,1594223,1594794,1594814,1594834,1595061,1595431,1596866,1596882,1600311,1600315,1600323,1600331,1600348,1600368,1600393,1600563,1600781,1600909,1601851,1606009,1611380-1611381,1612225,1615211,1615219,1615255-1615256,1615260,1615263,1616131,1619071,1619105,1619118,1619153,1619774,1619802,1620332,1621978,1621981,1625522,1625533,1625537,1628431,1628536,1628540,1633126,1636874,1637826,1640730,1640862,1640873,1641564,1643033,1643074,1643409,1643437,1643457,1643461,1643482,1643793,1643810,1643972-1643973,1644158,1644530,1644595,1644599,1646230,1646250,1646253,1646495,1646505,1646785-1646786,1646797,1647339,1650481,1650489,1650531,1650
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+/subversion/trunk:1467440,1467450,1467481,1467587,1467597,1467668,1467675,1467803,1467807,1467951,1468109,1468116,1468151,1468347,1468395,1468439,1468487,1468565-1468566,1468980,1469248,1469363,1469478,1469489,1469512-1469513,1469550,1469556,1469645,1469674,1469833,1469862,1469866,1469871,1469994,1470031,1470037,1470221,1470238,1470246,1470248,1470537,1470650,1470738,1470781,1470898,1470904,1470908,1470913,1470936,1470993-1470994,1471028-1471029,1471107,1471153,1471302,1471443,1471490,1471744,1475704,1475724,1475772,1475963,1476092,1476155,1476181,1476193,1476254,1476359,1476366,1476607,1477294,1477359,1477729-1477730,1477876,1477891,1478001,1478220-1478221,1478465,1478617,1478897,1478951,1478987,1478998,1479320-1479321,1479323,1479326,1479329,1479540,1479563,1479605,1479896,1480054,1480077,1480080,1480082,1480119,1480149,1480344,1480412,1480426,1480442,1480616,1480641-1480642,1480664,1480669,1480681,1480723,1480738,1480765,1481010,1481418,1481594,1481596,1481625,1481627-1481628,148
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 22,1513156,1513463,1513472,1513479,1513874,1513879-1513880,1513943,1514295,1514315,1514318,1514356,1514628,1514763,1514785,1514804,1515119,1515141,1515201,1515225,1515237,1515343,1515366,1515516,1515534,1515721,1515992,1515997,1516023-1516024,1516049,1516051-1516053,1516071,1516271,1516429,1516556,1516565,1516567,1516806,1518184,1518942,1519615,1519617,1519733,1519816,1519823,1519955,1520065,1520529,1520532,1520539,1520745,1522892,1523666,1524869,1525902,1526439,1526655,1527103,1527105,1530763,1530768,1530872,1530922,1530967,1531002,1531004,1531014,1531938,1532023,1532098,1532316,1534102,1534149,1534158,1534713,1534737,1534860,1535115,1535161,1535532,1535610,1535676,1536350,1536383,1536464,1536488,1536537,1536914,1536931,1537018,1537147,1537190,1537193,1537221,1537263,1537360,1537415,1537555,1537700,1538516-1538517,1538519,1538574,1538581,1538812,1538925,1538928,1538939,1540044,1540417,1540752,1541432,1541635,1541638,1541705,1541790,1542042,1542069,1542071,1542119,1542129,1542138,15
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 ,1578853,1578875,1579274,1579429,1579588,1579684,1580626,1580650,1580832,1580867,1580872,1581296,1581305,1581315,1581430,1581810,1583580,1583977,1584342,1584576,1584592,1584745,1585686,1586052,1586255,1586352,1586467,1587511,1587946,1587968,1588772,1588778,1589184,1589188,1589360,1589460,1589486,1590212,1590751,1591123,1592014,1592034,1592987,1593992,1594156,1594223,1594794,1594814,1594834,1595061,1595431,1596866,1596882,1600311,1600315,1600323,1600331,1600348,1600368,1600393,1600563,1600781,1600909,1601851,1606009,1611380-1611381,1612225,1615211,1615219,1615255-1615256,1615260,1615263,1616131,1619071,1619105,1619118,1619153,1619774,1619802,1620332,1621978,1621981,1625522,1625533,1625537,1628431,1628536,1628540,1633126,1636874,1637826,1640730,1640862,1640873,1641564,1643033,1643074,1643409,1643437,1643457,1643461,1643482,1643793,1643810,1643972-1643973,1644158,1644530,1644595,1644599,1646230,1646250,1646253,1646495,1646505,1646785-1646786,1646797,1647339,1650481,1650489,1650531,1650
 834,1651759,1651963,1651966,1651980,1651997,1652182,1652195,1652200,1652744,1653039,1653622-1653623,1653988,1654039,1654162,1654186,1654271,1655712,1655738,1656713,1656893,1657182,1657195,1657401,1658115,1658417,1659013,1659315,1659399,1659553-1659554,1659867,1659869
 /subversion/trunk/subversion/tests:1652182

Modified: subversion/branches/1.8.x/STATUS
URL: http://svn.apache.org/viewvc/subversion/branches/1.8.x/STATUS?rev=1666079&r1=1666078&r2=1666079&view=diff
==============================================================================
--- subversion/branches/1.8.x/STATUS (original)
+++ subversion/branches/1.8.x/STATUS Thu Mar 12 04:01:16 2015
@@ -173,25 +173,3 @@ Veto-blocked changes:
 
 Approved changes:
 =================
-
- * ^/subversion/branches/1.8.x-r1659867
-   Fix reproducable memory corruption and unneeded io errors on editor abort
-   Justification:
-     Reproducible double free(), which is undefined behaviour.  Details:
-     .
-     A SIGPIPE caused by cancelling a commit at the wrong time may cause
-     the commit editor to return an error from editor->close_edit() which
-     makes most code paths call editor->abort_edit(). But ra-local and ra-serf
-     then still tried to access the original transaction which is already
-     gone. Daniel Shahaf reported reproducable see double frees when using
-     ra-local with fsfs. This fix makes calling abort safe (+- a NO-OP) after
-     a successfull commit. A testcase is added showcasing this scenario.
-   Notes:
-     'svn import -mm | (sleep 2; cat)' followed by ^C at the right time was
-     the reproduction.
-   Branch:
-     ^/subversion/branches/1.8.x-r1659867
-   Votes:
-     +1: danielsh (without r1660091, r1660097,
-                   ra_serf part; looks good but I can't vouch for it)
-     +1: philip, rhuijben, stsp

Propchange: subversion/branches/1.8.x/subversion/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Thu Mar 12 04:01:16 2015
@@ -54,6 +54,7 @@
 /subversion/branches/1.8.x-r1644595/subversion:1644691-1659880
 /subversion/branches/1.8.x-r1646505/subversion:1659718-1660020
 /subversion/branches/1.8.x-r1646797/subversion:1646798-1659878
+/subversion/branches/1.8.x-r1659867/subversion:1659963-1666078
 /subversion/branches/1.8.x-r175-daemonize/subversion:1515866-1516020
 /subversion/branches/1.8.x-rm-external-dir/subversion:1600632-1615197
 /subversion/branches/1.8.x-serf-1.3+-windows/subversion:1517122-1533873
@@ -134,4 +135,4 @@
 /subversion/branches/uris-as-urls/subversion:1060426-1064427
 /subversion/branches/verify-at-commit/subversion:1462039-1462408
 /subversion/branches/wc-collate-path/subversion:1407642
-/subversion/trunk/subversion:1467440,1467450,1467481,1467587,1467597,1467668,1467675,1467803,1467807,1467951,1468109,1468116,1468151,1468347,1468395,1468439,1468487,1468565-1468566,1468980,1469248,1469363,1469478,1469489,1469512-1469513,1469550,1469556,1469645,1469674,1469833,1469862,1469866,1469871,1469994,1470031,1470037,1470221,1470238,1470246,1470248,1470537,1470650,1470738,1470781,1470898,1470904,1470908,1470913,1470936,1470993-1470994,1471028-1471029,1471107,1471153,1471302,1471443,1471490,1471744,1475704,1475724,1475772,1475963,1476092,1476155,1476181,1476193,1476254,1476359,1476366,1476607,1477294,1477359,1477729-1477730,1477876,1477891,1478001,1478220-1478221,1478465,1478617,1478897,1478951,1478987,1478998,1479320-1479321,1479323,1479326,1479329,1479540,1479563,1479605,1479896,1480054,1480077,1480080,1480082,1480119,1480149,1480344,1480412,1480426,1480442,1480616,1480641-1480642,1480664,1480669,1480681,1480723,1480738,1480765,1481010,1481418,1481594,1481596,1481625,1481627-
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Modified: subversion/branches/1.8.x/subversion/libsvn_ra_serf/commit.c
URL: http://svn.apache.org/viewvc/subversion/branches/1.8.x/subversion/libsvn_ra_serf/commit.c?rev=1666079&r1=1666078&r2=1666079&view=diff
==============================================================================
--- subversion/branches/1.8.x/subversion/libsvn_ra_serf/commit.c (original)
+++ subversion/branches/1.8.x/subversion/libsvn_ra_serf/commit.c Thu Mar 12 04:01:16 2015
@@ -2234,6 +2234,7 @@ close_edit(void *edit_baton,
     ctx->activity_url ? ctx->activity_url : ctx->txn_url;
   const svn_commit_info_t *commit_info;
   int response_code;
+  svn_error_t *err = NULL;
 
   /* MERGE our activity */
   SVN_ERR(svn_ra_serf__run_merge(&commit_info, &response_code,
@@ -2252,9 +2253,11 @@ close_edit(void *edit_baton,
                                response_code);
     }
 
+  ctx->txn_url = NULL; /* If HTTPv2, the txn is now done */
+
   /* Inform the WC that we did a commit.  */
   if (ctx->callback)
-    SVN_ERR(ctx->callback(commit_info, ctx->callback_baton, pool));
+    err = ctx->callback(commit_info, ctx->callback_baton, pool);
 
   /* If we're using activities, DELETE our completed activity.  */
   if (ctx->activity_url)
@@ -2271,11 +2274,17 @@ close_edit(void *edit_baton,
       handler->response_handler = svn_ra_serf__expect_empty_body;
       handler->response_baton = handler;
 
-      SVN_ERR(svn_ra_serf__context_run_one(handler, pool));
+      ctx->activity_url = NULL; /* Don't try again in abort_edit() on fail */
+
+      SVN_ERR(svn_error_compose_create(
+                  err,
+                  svn_ra_serf__context_run_one(handler, pool)));
 
       SVN_ERR_ASSERT(handler->sline.code == 204);
     }
 
+  SVN_ERR(err);
+
   return SVN_NO_ERROR;
 }
 

Modified: subversion/branches/1.8.x/subversion/libsvn_repos/commit.c
URL: http://svn.apache.org/viewvc/subversion/branches/1.8.x/subversion/libsvn_repos/commit.c?rev=1666079&r1=1666078&r2=1666079&view=diff
==============================================================================
--- subversion/branches/1.8.x/subversion/libsvn_repos/commit.c (original)
+++ subversion/branches/1.8.x/subversion/libsvn_repos/commit.c Thu Mar 12 04:01:16 2015
@@ -777,6 +777,13 @@ close_edit(void *edit_baton,
           post_commit_err = svn_repos__post_commit_error_str(err, pool);
           svn_error_clear(err);
         }
+
+      /* Make sure a future abort doesn't perform
+         any work. This may occur if the commit
+         callback returns an error! */
+
+      eb->txn = NULL;
+      eb->txn_root = NULL;
     }
   else
     {

Modified: subversion/branches/1.8.x/subversion/tests/libsvn_ra/ra-test.c
URL: http://svn.apache.org/viewvc/subversion/branches/1.8.x/subversion/tests/libsvn_ra/ra-test.c?rev=1666079&r1=1666078&r2=1666079&view=diff
==============================================================================
--- subversion/branches/1.8.x/subversion/tests/libsvn_ra/ra-test.c (original)
+++ subversion/branches/1.8.x/subversion/tests/libsvn_ra/ra-test.c Thu Mar 12 04:01:16 2015
@@ -31,6 +31,8 @@
 #include "svn_error.h"
 #include "svn_delta.h"
 #include "svn_ra.h"
+#include "svn_time.h"
+#include "svn_pools.h"
 
 #include "../svn_test.h"
 #include "../svn_test_fs.h"
@@ -151,6 +153,53 @@ location_segments_test(const svn_test_op
 }
 
 
+/* Implements svn_commit_callback2_t for commit_callback_failure() */
+static svn_error_t *
+commit_callback_with_failure(const svn_commit_info_t *info,
+                             void *baton,
+                             apr_pool_t *scratch_pool)
+{
+  apr_time_t timetemp;
+
+  SVN_TEST_ASSERT(info != NULL);
+  SVN_TEST_STRING_ASSERT(info->author, "");  /* No auth baton supplied. */
+  SVN_TEST_STRING_ASSERT(info->post_commit_err, NULL);
+
+  SVN_ERR(svn_time_from_cstring(&timetemp, info->date, scratch_pool));
+  SVN_TEST_ASSERT(info->date != 0);
+  SVN_TEST_ASSERT(info->repos_root != NULL);
+  SVN_TEST_ASSERT(info->revision == 1);
+
+  return svn_error_create(SVN_ERR_CANCELLED, NULL, NULL);
+}
+
+static svn_error_t *
+commit_callback_failure(const svn_test_opts_t *opts,
+                        apr_pool_t *pool)
+{
+  svn_ra_session_t *ra_session;
+  const svn_delta_editor_t *editor;
+  void *edit_baton;
+  void *root_baton;
+  SVN_ERR(make_and_open_local_repos(&ra_session, "commit_cb_failure", opts, pool));
+
+  SVN_ERR(svn_ra_get_commit_editor3(ra_session, &editor, &edit_baton,
+                                    apr_hash_make(pool), commit_callback_with_failure,
+                                    NULL, NULL, FALSE, pool));
+
+  SVN_ERR(editor->open_root(edit_baton, 1, pool, &root_baton));
+  SVN_ERR(editor->change_dir_prop(root_baton, "A",
+                                  svn_string_create("B", pool), pool));
+  SVN_ERR(editor->close_directory(root_baton, pool));
+  SVN_TEST_ASSERT_ERROR(editor->close_edit(edit_baton, pool),
+                        SVN_ERR_CANCELLED);
+
+  /* This is what users should do if close_edit fails... Except that in this case
+     the commit actually succeeded*/
+  SVN_ERR(editor->abort_edit(edit_baton, pool));
+  return SVN_NO_ERROR;
+}
+
 
 /* The test table.  */
 struct svn_test_descriptor_t test_funcs[] =
@@ -158,5 +207,7 @@ struct svn_test_descriptor_t test_funcs[
     SVN_TEST_NULL,
     SVN_TEST_OPTS_PASS(location_segments_test,
                        "test svn_ra_get_location_segments"),
+    SVN_TEST_OPTS_PASS(commit_callback_failure,
+                       "commit callback failure"),
     SVN_TEST_NULL
   };