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| author | Martin Schiller <ms@dev.tdt.de> | 2020-01-09 07:31:14 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-29 15:02:39 +0100 |
| commit | 94868d28db84f25e316e1d9d914263df4496e70b (patch) | |
| tree | 2765d35c71a7154d953dbbbf237bba540eab4980 /net/sctp | |
| parent | f3439dd7ee8662c4f8558b5f41676e15c31776c2 (diff) | |
| download | linux-stable-94868d28db84f25e316e1d9d914263df4496e70b.tar.gz linux-stable-94868d28db84f25e316e1d9d914263df4496e70b.tar.bz2 linux-stable-94868d28db84f25e316e1d9d914263df4496e70b.zip | |
net/x25: fix nonblocking connect
commit e21dba7a4df4d93da237da65a096084b4f2e87b4 upstream.
This patch fixes 2 issues in x25_connect():
1. It makes absolutely no sense to reset the neighbour and the
connection state after a (successful) nonblocking call of x25_connect.
This prevents any connection from being established, since the response
(call accept) cannot be processed.
2. Any further calls to x25_connect() while a call is pending should
simply return, instead of creating new Call Request (on different
logical channels).
This patch should also fix the "KASAN: null-ptr-deref Write in
x25_connect" and "BUG: unable to handle kernel NULL pointer dereference
in x25_connect" bugs reported by syzbot.
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
Reported-by: syzbot+429c200ffc8772bfe070@syzkaller.appspotmail.com
Reported-by: syzbot+eec0c87f31a7c3b66f7b@syzkaller.appspotmail.com
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/sctp')
0 files changed, 0 insertions, 0 deletions