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| author | Martin Wilck <mwilck@suse.com> | 2021-02-25 17:09:03 +0100 |
|---|---|---|
| committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2021-03-12 18:21:48 +0100 |
| commit | 6ba248ef66b669154788676233500659823fe51b (patch) | |
| tree | 3781bbd2be2ab26d259c4ff5fb5adc9254982cd6 | |
| parent | 2440aa43fec07e370886a0d6b10c251069e2cd5b (diff) | |
| download | systemd-6ba248ef66b669154788676233500659823fe51b.tar.gz | |
sd-device: don't use BPF filtering for kernel monitors
BPF filtering accesses fields in the netlink header that are
only filled in by libudev, never by the kernel. Therefore adding
BPF filters for kernel monitors is pointless. Even false filtering
of kernel events might be possible; at least it's hard to prove that
it can't occur.
(cherry picked from commit d8ce385fe3e5be91b6f414415e10f8897e41d942)
(cherry picked from commit 8f67d7ba3af72b1b3750530c123702246f35987f)
| -rw-r--r-- | src/libsystemd/sd-device/device-monitor.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/libsystemd/sd-device/device-monitor.c b/src/libsystemd/sd-device/device-monitor.c index 1d24af0696..5db5dd7218 100644 --- a/src/libsystemd/sd-device/device-monitor.c +++ b/src/libsystemd/sd-device/device-monitor.c @@ -629,8 +629,9 @@ _public_ int sd_device_monitor_filter_update(sd_device_monitor *m) { if (m->filter_uptodate) return 0; - if (hashmap_isempty(m->subsystem_filter) && - set_isempty(m->tag_filter)) { + if (m->snl.nl.nl_groups == MONITOR_GROUP_KERNEL || + (hashmap_isempty(m->subsystem_filter) && + set_isempty(m->tag_filter))) { m->filter_uptodate = true; return 0; } |