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| author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2018-01-25 21:03:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-09 10:51:48 +0300 |
| commit | 6a3c946b205fd5bc3be583a1f3adbda11128e7ed (patch) | |
| tree | 9ebae9289cee960c327378a4cb2e49c901d639b6 /mm/percpu.c | |
| parent | 3a928a262c1c1c63c929ebe40c181376afbcfe41 (diff) | |
| download | linux-6a3c946b205fd5bc3be583a1f3adbda11128e7ed.tar.xz | |
net: don't call update_pmtu unconditionally
commit f15ca723c1ebe6c1a06bc95fda6b62cd87b44559 upstream.
Some dst_ops (e.g. md_dst_ops)) doesn't set this handler. It may result to:
"BUG: unable to handle kernel NULL pointer dereference at (null)"
Let's add a helper to check if update_pmtu is available before calling it.
Fixes: 52a589d51f10 ("geneve: update skb dst pmtu on tx path")
Fixes: a93bf0ff4490 ("vxlan: update skb dst pmtu on tx path")
CC: Roman Kapl <code@rkapl.cz>
CC: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Thomas Deutschmann <whissi@gentoo.org>
Cc: Eddie Chapman <eddie@ehuk.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/percpu.c')
0 files changed, 0 insertions, 0 deletions