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Date:   Fri, 14 Aug 2020 13:04:22 +0200
From:   Marc Kleine-Budde <>
Subject: pull-request: can 2020-08-14

Hello David,

this is a pull request of 6 patches for net/master. All patches fix problems in
the j1939 CAN networking stack.

The first patch is by Eric Dumazet fixes a kernel-infoleak in

The remaining 5 patches are by Oleksij Rempel and fix recption of j1939
messages not orginated by the stack, a use-after-free in j1939_tp_txtimer(),
ensure that the CAN driver has a ml_priv allocated. These problem were found by
google's syzbot. Further ETP sessions with block size of less than 255 are
fixed and a sanity check was added to j1939_xtp_rx_dat_one() to detect packet



The following changes since commit 9643609423c7667fb748cc3ccff023d761d0ac90:

  Revert "ipv4: tunnel: fix compilation on ARCH=um" (2020-08-12 13:26:37 -0700)

are available in the Git repository at:

  git:// tags/linux-can-fixes-for-5.9-20200814

for you to fetch changes up to e052d0540298bfe0f6cbbecdc7e2ea9b859575b2:

  can: j1939: transport: j1939_xtp_rx_dat_one(): compare own packets to detect corruptions (2020-08-14 12:38:47 +0200)


Eric Dumazet (1):
      can: j1939: fix kernel-infoleak in j1939_sk_sock2sockaddr_can()

Oleksij Rempel (5):
      can: j1939: transport: j1939_simple_recv(): ignore local J1939 messages send not by J1939 stack
      can: j1939: transport: j1939_session_tx_dat(): fix use-after-free read in j1939_tp_txtimer()
      can: j1939: socket: j1939_sk_bind(): make sure ml_priv is allocated
      can: j1939: transport: add j1939_session_skb_find_by_offset() function
      can: j1939: transport: j1939_xtp_rx_dat_one(): compare own packets to detect corruptions

 net/can/j1939/socket.c    | 14 ++++++++++++
 net/can/j1939/transport.c | 56 ++++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 62 insertions(+), 8 deletions(-)

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