vcan0: j1939_tp_rxtimer: 0x00000000c6b822ce: rx timeout, send abort vcan0: j1939_xtp_rx_abort_one: 0x00000000c6b822ce: 0x00000: (3) A timeout occurred and this is the connection abort to close the session. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 16 at net/can/j1939/socket.c:180 j1939_sk_queue_activate_next_locked net/can/j1939/socket.c:180 [inline] WARNING: CPU: 1 PID: 16 at net/can/j1939/socket.c:180 j1939_sk_queue_activate_next+0x359/0x460 net/can/j1939/socket.c:204 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.4.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:179 [inline] fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028 RIP: 0010:j1939_sk_queue_activate_next_locked net/can/j1939/socket.c:180 [inline] RIP: 0010:j1939_sk_queue_activate_next+0x359/0x460 net/can/j1939/socket.c:204 Code: e8 1c 83 c0 0a 89 45 cc eb 9f 48 c7 c7 b4 1a c7 89 e8 cb b1 2d fb e9 6a fd ff ff e8 c1 b1 2d fb e9 19 fe ff ff e8 17 f9 f1 fa <0f> 0b 48 8b 45 c0 48 8d b8 b0 00 00 00 48 89 f8 48 c1 e8 03 42 0f RSP: 0018:ffff8880a9907918 EFLAGS: 00010206 RAX: ffff8880a98fa440 RBX: ffff8880986e8000 RCX: ffffffff86816668 RDX: 0000000000000100 RSI: ffffffff86816709 RDI: 0000000000000005 RBP: ffff8880a9907970 R08: ffff8880a98fa440 R09: fffffbfff14f0f58 R10: fffffbfff14f0f57 R11: ffffffff8a787abf R12: ffff8880986e8510 R13: ffff888093a4f400 R14: ffff8880986e8548 R15: dffffc0000000000 j1939_session_deactivate_activate_next+0x3d/0x50 net/can/j1939/transport.c:1046 j1939_xtp_rx_abort_one.cold+0x21a/0x35e net/can/j1939/transport.c:1275 j1939_xtp_rx_abort net/can/j1939/transport.c:1286 [inline] j1939_tp_cmd_recv net/can/j1939/transport.c:1972 [inline] j1939_tp_recv+0x783/0x9b0 net/can/j1939/transport.c:2005 j1939_can_recv+0x502/0x610 net/can/j1939/main.c:101 deliver net/can/af_can.c:569 [inline] can_rcv_filter+0x292/0x8e0 net/can/af_can.c:603 can_receive+0x2e7/0x530 net/can/af_can.c:660 can_rcv+0x133/0x1b0 net/can/af_can.c:686 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:5150 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5264 process_backlog+0x206/0x750 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x508/0x1120 net/core/dev.c:6600 __do_softirq+0x262/0x98c kernel/softirq.c:292 run_ksoftirqd kernel/softirq.c:603 [inline] run_ksoftirqd+0x8e/0x110 kernel/softirq.c:595 smpboot_thread_fn+0x6a3/0xa40 kernel/smpboot.c:165 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds..