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| /openbmc/linux/net/dccp/ |
| H A D | proto.c | diff 67f93df79aeefc3add4e4b31a752600f834236e2 Tue Mar 06 13:57:01 CST 2018 Alexey Kodanev <alexey.kodanev@oracle.com> dccp: check sk for closed state in dccp_sendmsg()
dccp_disconnect() sets 'dp->dccps_hc_tx_ccid' tx handler to NULL,
therefore if DCCP socket is disconnected and dccp_sendmsg() is
called after it, it will cause a NULL pointer dereference in
dccp_write_xmit().
This crash and the reproducer was reported by syzbot. Looks like
it is reproduced if commit 69c64866ce07 ("dccp: CVE-2017-8824:
use-after-free in DCCP code") is applied.
Reported-by: syzbot+f99ab3887ab65d70f816@syzkaller.appspotmail.com
Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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