sd-device-monitor: fix subsystem filter

This fixes a bug introduced by 759d9f3f8d07af2940bb3783acc3985ee47adfa5.

Fixes #10882.

diff --git a/src/libsystemd/sd-device/device-monitor.c b/src/libsystemd/sd-device/device-monitor.c
index bb50257a0df4a1eb1836f77e7f07e166dada6d90..05e7ec07159bf83563710eafd77ba23384c5e23d 100644 (file)
--- a/src/libsystemd/sd-device/device-monitor.c
+++ b/src/libsystemd/sd-device/device-monitor.c
@@ -648,13 +648,12 @@ _public_ int sd_device_monitor_filter_update(sd_device_monitor *m) {
                                 /* jump if subsystem does not match */
                                 bpf_jmp(ins, &i, BPF_JMP|BPF_JEQ|BPF_K, hash, 0, 1);
                         } else {
-                                hash = string_hash32(devtype);
-
                                 /* jump if subsystem does not match */
                                 bpf_jmp(ins, &i, BPF_JMP|BPF_JEQ|BPF_K, hash, 0, 3);
                                 /* load device devtype value in A */
                                 bpf_stmt(ins, &i, BPF_LD|BPF_W|BPF_ABS, offsetof(monitor_netlink_header, filter_devtype_hash));
                                 /* jump if value does not match */
+                                hash = string_hash32(devtype);
                                 bpf_jmp(ins, &i, BPF_JMP|BPF_JEQ|BPF_K, hash, 0, 1);
                         }