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libudev: monitor - do not filter messages with wrong magic

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This commit is contained in:
Kay Sievers 2009-04-23 03:33:58 +02:00
parent dacea9ff6b
commit e93c38c3a2
1 changed files with 2 additions and 2 deletions
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4
udev/lib/libudev-monitor.c
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@ -241,8 +241,8 @@ static int filter_apply(struct udev_monitor *udev_monitor)
bpf_stmt(ins, &i, BPF_LD|BPF_W|BPF_ABS, offsetof(struct udev_monitor_netlink_header, magic));
/* jump if magic matches */
bpf_jmp(ins, &i, BPF_JMP|BPF_JEQ|BPF_K, UDEV_MONITOR_MAGIC, 1, 0);
/* wrong magic, drop packet */
bpf_stmt(ins, &i, BPF_RET|BPF_K, 0);
/* wrong magic, pass packet */
bpf_stmt(ins, &i, BPF_RET|BPF_K, 0xffffffff);
/* add all subsystem match values */
udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_monitor->filter_subsystem_list)) {