anitazha / rpms / systemd

Forked from rpms/systemd 3 years ago
Clone

Blame SOURCES/0317-core-fix-memory-leak-on-failed-preset-all.patch

1abbee
From 9d00fbb87c43e129e1ab29298afc86b7e8eed25c Mon Sep 17 00:00:00 2001
1abbee
From: Evgeny Vereshchagin <evvers@ya.ru>
1abbee
Date: Mon, 18 Jan 2016 06:10:33 +0000
1abbee
Subject: [PATCH] core: fix memory leak on failed preset-all
1abbee
1abbee
How to reproduce
1abbee
$ systemctl set-default multi-user # https://github.com/systemd/systemd/issues/2298
1abbee
$ systemctl preset-all
1abbee
Failed to execute operation: Too many levels of symbolic links
1abbee
1abbee
$ systemctl poweroff
1abbee
1abbee
Fixes:
1abbee
==1==
1abbee
==1== HEAP SUMMARY:
1abbee
==1==     in use at exit: 65,645 bytes in 7 blocks
1abbee
==1==   total heap usage: 40,539 allocs, 40,532 frees, 30,147,547 bytes allocated
1abbee
==1==
1abbee
==1== 109 (24 direct, 85 indirect) bytes in 1 blocks are definitely lost in loss record 2 of 7
1abbee
==1==    at 0x4C2BBCF: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
1abbee
==1==    by 0x4C2DE2F: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
1abbee
==1==    by 0x23DA71: unit_file_changes_add (install.c:233)
1abbee
==1==    by 0x23E45D: remove_marked_symlinks_fd (install.c:453)
1abbee
==1==    by 0x23E267: remove_marked_symlinks_fd (install.c:405)
1abbee
==1==    by 0x23E641: remove_marked_symlinks (install.c:494)
1abbee
==1==    by 0x243A91: execute_preset (install.c:2190)
1abbee
==1==    by 0x244343: unit_file_preset_all (install.c:2351)
1abbee
==1==    by 0x18AAA2: method_preset_all_unit_files (dbus-manager.c:1846)
1abbee
==1==    by 0x1D8157: method_callbacks_run (bus-objects.c:420)
1abbee
==1==    by 0x1DA9E9: object_find_and_run (bus-objects.c:1257)
1abbee
==1==    by 0x1DB02B: bus_process_object (bus-objects.c:1373)
1abbee
==1==
1abbee
==1== LEAK SUMMARY:
1abbee
==1==    definitely lost: 24 bytes in 1 blocks
1abbee
==1==    indirectly lost: 85 bytes in 1 blocks
1abbee
==1==      possibly lost: 0 bytes in 0 blocks
1abbee
==1==    still reachable: 65,536 bytes in 5 blocks
1abbee
==1==         suppressed: 0 bytes in 0 blocks
1abbee
==1== Reachable blocks (those to which a pointer was found) are not shown.
1abbee
==1== To see them, rerun with: --leak-check=full --show-leak-kinds=all
1abbee
==1==
1abbee
==1== For counts of detected and suppressed errors, rerun with: -v
1abbee
==1== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
1abbee
1abbee
Cherry-picked from: c292c3af38c8c23e183f3e63ef492926cea64bab
1abbee
Related: #1331667
1abbee
---
1abbee
 src/core/dbus-manager.c | 4 +++-
1abbee
 1 file changed, 3 insertions(+), 1 deletion(-)
1abbee
1abbee
diff --git a/src/core/dbus-manager.c b/src/core/dbus-manager.c
181b3f
index 1a5525e50..9eef290ca 100644
1abbee
--- a/src/core/dbus-manager.c
1abbee
+++ b/src/core/dbus-manager.c
1abbee
@@ -1875,8 +1875,10 @@ static int method_preset_all_unit_files(sd_bus *bus, sd_bus_message *message, vo
1abbee
         scope = m->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER;
1abbee
 
1abbee
         r = unit_file_preset_all(scope, runtime, NULL, mm, force, &changes, &n_changes);
1abbee
-        if (r < 0)
1abbee
+        if (r < 0) {
1abbee
+                unit_file_changes_free(changes, n_changes);
1abbee
                 return r;
1abbee
+        }
1abbee
 
1abbee
         return reply_unit_file_changes_and_free(m, bus, message, -1, changes, n_changes);
1abbee
 }