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libabis: fix segfault on malformed ipaccess RSL link

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This patch fixes a segfault that occured when a ipaccess RSL link gets
closed unexpectedly.
The segfault can be provoked by connecting to the RSL port with ncat and
hitting ^C.
This commit is contained in:
Alexander Huemer
2011-05-24 15:16:57 +02:00
committed by Harald Welte
parent 9e26773167
commit 792edebb4f
1 changed files with 4 additions and 1 deletions
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5
openbsc/src/libabis/input/ipaccess.c
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@@ -429,12 +429,15 @@ static int ipaccess_drop(struct e1inp_ts *ts, struct osmo_fd *bfd)
struct e1inp_sign_link *link;
int bts_nr;
if (!ts) {
if (!ts || !bfd->data) {
/*
* If we don't have a TS this means that this is a RSL
* connection but we are not past the authentication
* handling yet. So we can safely delete this bfd and
* wait for a reconnect.
* If we don't have bfd->data this means that a RSL
* connection was accept()ed, but nothing was recv()ed
* and the connection gets close()ed.
*/
osmo_fd_unregister(bfd);
close(bfd->fd);