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| author | Thomas Haller <thaller@redhat.com> | 2015-09-22 14:03:32 +0200 |
|---|---|---|
| committer | Thomas Haller <thaller@redhat.com> | 2015-09-23 15:48:27 +0200 |
| commit | 809cd0acb55a3671f6508541e444e6e11732005a (patch) | |
| tree | 84a1bcc900372477f80a84d1cf11ae527272cc51 | |
| parent | d4cd030f1f85f86bb0568b197342eac661f44c94 (diff) | |
| download | NetworkManager-th/systemd-dhcp-timer-rh1260727.tar.gz | |
systemd: avoid potential crash due to uncanceled timers in client_receive_advertise()th/systemd-dhcp-timer-rh1260727
Got a crash with unknown reason on nm-1-0 branch. It's unclear why,
but the reason could be that a lease in client_receive_advertise()
was cleared, but not its timers.
Backtrace from nm-1-0 branch (note that the systemd code there is older):
#0 sd_event_source_unref (s=0xf5c007e8fb894853) at dhcp-manager/systemd-dhcp/nm-sd-adapt.c:53
#1 0x0000555555682340 in client_timeout_t1 (s=<optimized out>, usec=<optimized out>, userdata=0x5555559f5240)
at dhcp-manager/systemd-dhcp/src/libsystemd-network/sd-dhcp6-client.c:451
#2 0x00005555556a078f in time_ready (source=0x5555559f3c20) at dhcp-manager/systemd-dhcp/nm-sd-adapt.c:146
#3 0x00007ffff4a481b3 in g_timeout_dispatch () from /lib64/libglib-2.0.so.0
#4 0x00007ffff4a4779a in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#5 0x00007ffff4a47ae8 in g_main_context_iterate.isra.24 () from /lib64/libglib-2.0.so.0
#6 0x00007ffff4a47dba in g_main_loop_run () from /lib64/libglib-2.0.so.0
#7 0x0000555555597073 in main (argc=1, argv=0x7fffffffe2b8) at main.c:512
Related patch reported to upstream systemd as
https://github.com/systemd/systemd/pull/1332
https://bugzilla.redhat.com/show_bug.cgi?id=1260727
| -rw-r--r-- | src/systemd/src/libsystemd-network/sd-dhcp6-client.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/systemd/src/libsystemd-network/sd-dhcp6-client.c b/src/systemd/src/libsystemd-network/sd-dhcp6-client.c index 5f1393c60c..ee61b4f114 100644 --- a/src/systemd/src/libsystemd-network/sd-dhcp6-client.c +++ b/src/systemd/src/libsystemd-network/sd-dhcp6-client.c @@ -864,7 +864,10 @@ static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *adver r = dhcp6_lease_get_preference(client->lease, &pref_lease); if (r < 0 || pref_advertise > pref_lease) { - sd_dhcp6_lease_unref(client->lease); + if (client->lease) { + dhcp6_lease_clear_timers(&client->lease->ia); + sd_dhcp6_lease_unref(client->lease); + } client->lease = lease; lease = NULL; r = 0; |