vcan0: j1939_xtp_rx_rts_session_active: 0xffff888015ed6000: connection exists (00 00). last cmd: ff vcan0: j1939_xtp_rx_abort_one: 0xffff888015ed6800: 0x00000: (1) Already in one or more connection managed sessions and cannot support another. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 15 at net/can/j1939/transport.c:1090 j1939_session_deactivate net/can/j1939/transport.c:1090 [inline] WARNING: CPU: 0 PID: 15 at net/can/j1939/transport.c:1090 j1939_session_deactivate_activate_next+0x7b/0xa8 net/can/j1939/transport.c:1100 Modules linked in: CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 5.18.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:j1939_session_deactivate net/can/j1939/transport.c:1090 [inline] RIP: 0010:j1939_session_deactivate_activate_next+0x7b/0xa8 net/can/j1939/transport.c:1100 Code: e0 2a 48 c1 ea 03 8a 14 02 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 0c 84 d2 74 08 4c 89 ef e8 cb f1 22 f9 8b 45 28 83 f8 01 77 02 <0f> 0b 48 89 ef e8 f9 4d f6 fe 4c 89 e7 41 89 c5 e8 de 7d 05 00 45 RSP: 0018:ffffc900001479e8 EFLAGS: 00010246 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff888ab229 RDX: 1ffff11002bdad00 RSI: 0000000000000004 RDI: ffff888015ed6828 RBP: ffff888015ed6800 R08: 0000000000000000 R09: ffff888015ed682b R10: ffffed1002bdad05 R11: 0000000000000000 R12: ffff88801ec29070 R13: ffff888015ed6828 R14: ffff888067cea018 R15: ffffffff89f41ea0 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa978f6b160 CR3: 000000007f682000 CR4: 0000000000350ef0 Call Trace: j1939_xtp_rx_abort_one.cold+0x1cb/0x2f1 net/can/j1939/transport.c:1340 j1939_xtp_rx_abort net/can/j1939/transport.c:1351 [inline] j1939_tp_cmd_recv net/can/j1939/transport.c:2100 [inline] j1939_tp_recv+0x86a/0x9f0 net/can/j1939/transport.c:2133 j1939_can_recv+0x573/0x7c0 net/can/j1939/main.c:108 deliver net/can/af_can.c:574 [inline] can_rcv_filter+0x4ce/0x7b0 net/can/af_can.c:608 can_receive+0x2ae/0x4a0 net/can/af_can.c:665 can_rcv+0xce/0x160 net/can/af_can.c:696 __netif_receive_skb_one_core+0x104/0x180 net/core/dev.c:5405 process_backlog+0x2e4/0x6d0 net/core/dev.c:5847 __napi_poll+0x96/0x510 net/core/dev.c:6413 napi_poll net/core/dev.c:6480 [inline] net_rx_action+0x7b2/0xb40 net/core/dev.c:6567 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 run_ksoftirqd kernel/softirq.c:921 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:913 smpboot_thread_fn+0x548/0x8c0 kernel/smpboot.c:164 kthread+0x299/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298