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Fix for use after free in affile_dw_reap 

This resolves rhbz#1663936.
This commit is contained in:
My Karlsson 2019-01-07 21:21:06 +01:00
parent 1567eca73b
commit 79474cee8b
2 changed files with 36 additions and 1 deletions
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29
syslog-ng-3.18.1-1663936-use-after-free.patch Normal file
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@ -0,0 +1,29 @@
diff -ur syslog-ng-3.18.1.orig/modules/affile/affile-dest.c syslog-ng-3.18.1/modules/affile/affile-dest.c
--- syslog-ng-3.18.1.orig/modules/affile/affile-dest.c 2018-10-17 12:06:08.000000000 +0200
+++ syslog-ng-3.18.1/modules/affile/affile-dest.c 2019-01-07 20:56:23.946756461 +0100
@@ -127,21 +127,22 @@
affile_dw_reap(gpointer s)
{
AFFileDestWriter *self = (AFFileDestWriter *) s;
+ AFFileDestDriver *owner = self->owner;
main_loop_assert_main_thread();
- g_static_mutex_lock(&self->owner->lock);
+ g_static_mutex_lock(&owner->lock);
if (!log_writer_has_pending_writes((LogWriter *) self->writer) && !self->queue_pending)
{
msg_verbose("Destination timed out, reaping",
evt_tag_str("template", self->owner->filename_template->template),
evt_tag_str("filename", self->filename));
affile_dd_reap_writer(self->owner, self);
- g_static_mutex_unlock(&self->owner->lock);
+ g_static_mutex_unlock(&owner->lock);
}
else
{
- g_static_mutex_unlock(&self->owner->lock);
+ g_static_mutex_unlock(&owner->lock);
affile_dw_arm_reaper(self);
}
}

8
syslog-ng.spec
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@ -8,7 +8,7 @@
Name: syslog-ng
Version: %{syslog_ng_ver}
Release: 1%{?dist}
Release: 2%{?dist}
Summary: Next-generation syslog server
Group: System Environment/Daemons
@ -19,6 +19,9 @@ Source1: syslog-ng.conf
Source2: syslog-ng.logrotate
Source3: syslog-ng.service
# https://github.com/balabit/syslog-ng/issues/2454
Patch1: syslog-ng-3.18.1-1663936-use-after-free.patch
BuildRequires: perl-generators
BuildRequires: systemd-units
BuildRequires: pkgconfig
@ -434,6 +437,9 @@ fi
%changelog
* Mon Jan 07 2019 My Karlsson <mk@acc.umu.se> - 3.18.1-2
- Backport fix for use after free in affile_dw_reap (rhbz#1663936)
* Sat Nov 17 2018 My Karlsson <mk@acc.umu.se> - 3.18.1-1
- Update to version 3.18.1