Fabio Erculiani
40 lines
1.1 KiB
Diff
40 lines
1.1 KiB
Diff
diff -ruNp udev-124~/udevd.c udev-124/udevd.c
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--- udev-124~/udevd.c 2008-06-11 22:24:30.000000000 -0700
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+++ udev-124/udevd.c 2009-04-08 16:30:06.000000000 -0700
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@@ -753,16 +753,34 @@ static struct udevd_uevent_msg *get_netl
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struct udevd_uevent_msg *msg;
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int bufpos;
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ssize_t size;
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+ struct sockaddr_nl snl;
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+ struct msghdr smsg;
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+ struct iovec iov;
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static char buffer[UEVENT_BUFFER_SIZE+512];
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char *pos;
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- size = recv(uevent_netlink_sock, &buffer, sizeof(buffer), 0);
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+ iov.iov_base = buffer;
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+ iov.iov_len = sizeof(buffer);
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+
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+ memset(&smsg, 0x00, sizeof(struct msghdr));
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+ smsg.msg_name = &snl;
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+ smsg.msg_namelen = sizeof(struct sockaddr_nl);
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+ smsg.msg_iov = &iov;
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+ smsg.msg_iovlen = 1;
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+
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+ size = recvmsg(uevent_netlink_sock, &smsg, 0);
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if (size < 0) {
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if (errno != EINTR)
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err("unable to receive kernel netlink message: %s\n", strerror(errno));
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return NULL;
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}
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+ if ((snl.nl_groups != 1) || (snl.nl_pid != 0)) {
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+ info("ignored netlink message from invalid group/sender %d/%d\n",
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+ snl.nl_groups, snl.nl_pid);
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+ return NULL;
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+ }
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+
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if ((size_t)size > sizeof(buffer)-1)
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size = sizeof(buffer)-1;
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buffer[size] = '\0';
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