diff options
| author | Eric Dumazet <edumazet@google.com> | 2017-02-04 11:16:52 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-18 16:39:26 +0100 |
| commit | 2d9c2e011fd3f1be4e5643d6ad186faa5e50d4d1 (patch) | |
| tree | 11e4e29d36c46efe59c2f06050fd8becf8fc8f11 /include | |
| parent | 22449a01baa59fc7fb2a09df26f55faf967828bc (diff) | |
ipv4: keep skb->dst around in presence of IP options
[ Upstream commit 34b2cef20f19c87999fff3da4071e66937db9644 ]
Andrey Konovalov got crashes in __ip_options_echo() when a NULL skb->dst
is accessed.
ipv4_pktinfo_prepare() should not drop the dst if (evil) IP options
are present.
We could refine the test to the presence of ts_needtime or srr,
but IP options are not often used, so let's be conservative.
Thanks to syzkaller team for finding this bug.
Fixes: d826eb14ecef ("ipv4: PKTINFO doesnt need dst reference")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions