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| author | Alexey Kodanev <alexey.kodanev@oracle.com> | 2018-03-06 22:57:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-31 18:05:45 +0200 |
| commit | 5df0f40809d4ac73ce859681a689cfd328ae5788 (patch) | |
| tree | 9742ad9cab6e18c09e7947efdb0084312c2d23aa /CREDITS | |
| parent | 01a82ba817fc39513516a7d4c1dbd2cb4e743357 (diff) | |
dccp: check sk for closed state in dccp_sendmsg()
[ Upstream commit 67f93df79aeefc3add4e4b31a752600f834236e2 ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'CREDITS')
0 files changed, 0 insertions, 0 deletions