Public bug reported:
The systemd-networkd crashes when we do tc operation on ubuntu 24.04 system
(systemd=255.4-1ubuntu8.12).
In the following scenario, this is a 100% reproducible bug.
We also found the same issue
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/2067924 in launchpad.
Environment:
os:ubuntu 24.04
nic:multiple hardware queues (>1)
systemd:255.4-1ubuntu8.12 (255.4-1ubuntu8.17 also has the same issue)
Script:
#!/bin/bash
count=0
loop=10
for ii in $(seq 1 "$loop"); do
# init systemd-networkd status
systemctl restart systemd-networkd
sleep 5
pre_pid=$(pidof systemd-networkd)
# do tc operation; this operation will cause the crash
tc qdisc replace dev eth0 root handle 1: mq
# undo tc operation
tc qdisc delete dev eth0 root
sleep 5
now_pid=$(pidof systemd-networkd)
if [[ $pre_pid != $now_pid ]]; then
echo loopping $ii crash
count=$((count+1))
fi
done
echo $count/$loop
Result:
systemd-networkd should run normally,but it crashed with the stack overflow.
#0 0x000076c6493c4d0a in _hashmap_iterate (h=0x635ddd0ef398,
i=i@entry=0x7ffd04ca7040, value=value@entry=0x7ffd04ca7038, key=key@entry=0x0)
at ../src/basic/hashmap.c:722
#1 0x0000635dd0858af5 in set_iterate (value=0x7ffd04ca7038, i=0x7ffd04ca7040,
s=<optimized out>) at ../src/basic/set.h:76
#2 tclass_drop.isra.0 (tclass=0x635ddd10abc0) at ../src/network/tc/tclass.c:264
#3 0x0000635dd08589cd in qdisc_drop.isra.0 (qdisc=0x635ddd10c200) at
../src/network/tc/qdisc.c:301
#4 0x0000635dd0858b0a in tclass_drop.isra.0 (tclass=0x635ddd10abc0) at
../src/network/tc/tclass.c:268
#5 0x0000635dd08589cd in qdisc_drop.isra.0 (qdisc=0x635ddd10c200) at
../src/network/tc/qdisc.c:301
#6 0x0000635dd0858b0a in tclass_drop.isra.0 (tclass=0x635ddd10abc0) at
../src/network/tc/tclass.c:268
#7 0x0000635dd08589cd in qdisc_drop.isra.0 (qdisc=0x635ddd10c200) at
../src/network/tc/qdisc.c:301
#8 0x0000635dd0858b0a in tclass_drop.isra.0 (tclass=0x635ddd10abc0) at
../src/network/tc/tclass.c:268
.....
#87348 0x0000635dd0858b0a in tclass_drop.isra.0 (tclass=0x635ddd10abc0) at
../src/network/tc/tclass.c:268
#87349 0x0000635dd08589cd in qdisc_drop.isra.0 (qdisc=0x635ddd101d20) at
../src/network/tc/qdisc.c:301
#87350 0x0000635dd07c545e in manager_rtnl_process_qdisc (rtnl=<optimized out>,
message=0x635ddd0f3110, m=0x635ddd0ee0d0) at ../src/network/tc/qdisc.c:549
#87351 0x000076c649464f1e in process_match (m=0x635ddd0f3110,
nl=0x635ddd0effa0) at ../src/libsystemd/sd-netlink/sd-netlink.c:314
#87352 process_running (ret=0x0, nl=0x635ddd0effa0) at
../src/libsystemd/sd-netlink/sd-netlink.c:344
#87353 sd_netlink_process (nl=0x635ddd0effa0, ret=ret@entry=0x0) at
../src/libsystemd/sd-netlink/sd-netlink.c:374
#87354 0x000076c6494653f7 in io_callback (s=<optimized out>, fd=<optimized
out>, revents=<optimized out>, userdata=<optimized out>) at
../src/libsystemd/sd-netlink/sd-netlink.c:655
#87355 0x000076c64949d424 in source_dispatch (s=s@entry=0x635ddd0f0120) at
../src/libsystemd/sd-event/sd-event.c:4187
#87356 0x000076c64949d76d in sd_event_dispatch (e=<optimized out>,
e@entry=0x635ddd0ee410) at ../src/libsystemd/sd-event/sd-event.c:4808
#87357 0x000076c64949f0d8 in sd_event_run (e=<optimized out>,
e@entry=0x635ddd0ee410, timeout=timeout@entry=18446744073709551615) at
../src/libsystemd/sd-event/sd-event.c:4869
#87358 0x000076c64949f2ff in sd_event_loop (e=<optimized out>) at
../src/libsystemd/sd-event/sd-event.c:4891
#87359 0x0000635dd079727b in run (argc=<optimized out>, argv=<optimized out>)
at ../src/network/networkd.c:117
#87360 0x0000635dd0790cd9 in main (argc=<optimized out>, argv=<optimized out>)
at ../src/network/networkd.c:124
Upstream status:
This issue was introduced in upstream version v255 and has been fixed in
upstream version v256.
bug: https://github.com/systemd/systemd/issues/32247
fix patch 1:
https://github.com/systemd/systemd/commit/632d321050f58fe1b5bed7cfe769d212377c0301
fix patch 2:
https://github.com/systemd/systemd/commit/ee8f605ded4fea6b93aae018415efae877c26ed2
Does Ubuntu 24.04 have any plans to fix this issue?
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2164889
Title:
systemd-networkd crashes on ubuntu 24.04 systems with tc operation
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