vcan0: j1939_xtp_rx_abort_one: 0x0000000084bb78ec: 0x00000: (3) A timeout occurred and this is the connection abort to close the session. ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x3a8b/0x4a00 kernel/locking/lockdep.c:3828 Read of size 8 at addr ffff888098b25080 by task kworker/0:11/28347 CPU: 0 PID: 28347 Comm: kworker/0:11 Not tainted 5.4.0-rc5+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events cache_reap Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506 kasan_report+0x12/0x20 mm/kasan/common.c:634 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132 __lock_acquire+0x3a8b/0x4a00 kernel/locking/lockdep.c:3828 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4487 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:343 [inline] j1939_session_list_lock net/can/j1939/transport.c:238 [inline] j1939_session_get_by_addr+0x2d/0x60 net/can/j1939/transport.c:530 j1939_xtp_rx_abort_one+0x8d/0x100 net/can/j1939/transport.c:1242 j1939_xtp_rx_abort net/can/j1939/transport.c:1270 [inline] j1939_tp_cmd_recv net/can/j1939/transport.c:1961 [inline] j1939_tp_recv+0x513/0x9b0 net/can/j1939/transport.c:1991 j1939_can_recv+0x4bb/0x620 net/can/j1939/main.c:100 deliver net/can/af_can.c:568 [inline] can_rcv_filter+0x292/0x8e0 net/can/af_can.c:602 can_receive+0x2e7/0x530 net/can/af_can.c:659 can_rcv+0x133/0x1b0 net/can/af_can.c:685 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:4929 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5043 process_backlog+0x206/0x750 net/core/dev.c:5874 napi_poll net/core/dev.c:6311 [inline] net_rx_action+0x508/0x1120 net/core/dev.c:6379 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:drain_array+0x36/0xb0 mm/slab.c:3952 Code: 41 55 41 54 53 48 83 ec 18 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 48 85 d2 4c 89 75 c0 4c 89 75 c8 74 1b 49 89 d4 8b 12 <85> d2 74 12 41 8b 44 24 0c 85 c0 74 27 41 c7 44 24 0c 00 00 00 00 RSP: 0018:ffff888062177c90 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff88809585a8c0 RCX: 0000000000000000 RDX: 000000000000000a RSI: ffff8880a3dae800 RDI: ffff88809585a8c0 RBP: ffff888062177cd0 R08: ffff888097d20280 R09: fffffbfff14efd35 R10: fffffbfff14efd34 R11: ffffffff8a77e9a7 R12: ffffe8ffffc8e3d0 R13: 0000000000000000 R14: ffff888062177c90 R15: 0000607f5148e3d0 cache_reap+0xf3/0x280 mm/slab.c:4002 process_one_work+0x9af/0x1740 kernel/workqueue.c:2269 worker_thread+0x98/0xe40 kernel/workqueue.c:2415 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 30678: save_stack+0x23/0x90 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc mm/kasan/common.c:510 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:483 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:524 kmem_cache_alloc_trace+0x158/0x790 mm/slab.c:3550 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:690 [inline] j1939_priv_create net/can/j1939/main.c:122 [inline] j1939_netdev_start+0xa4/0x550 net/can/j1939/main.c:251 j1939_sk_bind+0x65a/0x8e0 net/can/j1939/socket.c:438 __sys_bind+0x239/0x290 net/socket.c:1647 __do_sys_bind net/socket.c:1658 [inline] __se_sys_bind net/socket.c:1656 [inline] __x64_sys_bind+0x73/0xb0 net/socket.c:1656 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 28347: save_stack+0x23/0x90 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] kasan_set_free_info mm/kasan/common.c:332 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:471 kasan_slab_free+0xe/0x10 mm/kasan/common.c:480 __cache_free mm/slab.c:3425 [inline] kfree+0x10a/0x2c0 mm/slab.c:3756 __j1939_priv_release net/can/j1939/main.c:154 [inline] kref_put include/linux/kref.h:65 [inline] j1939_priv_put+0x8b/0xb0 net/can/j1939/main.c:159 j1939_session_destroy net/can/j1939/transport.c:271 [inline] __j1939_session_release net/can/j1939/transport.c:280 [inline] kref_put include/linux/kref.h:65 [inline] j1939_session_put+0x12c/0x180 net/can/j1939/transport.c:285 j1939_xtp_rx_abort_one+0xc7/0x100 net/can/j1939/transport.c:1261 j1939_xtp_rx_abort net/can/j1939/transport.c:1269 [inline] j1939_tp_cmd_recv net/can/j1939/transport.c:1961 [inline] j1939_tp_recv+0x4fb/0x9b0 net/can/j1939/transport.c:1991 j1939_can_recv+0x4bb/0x620 net/can/j1939/main.c:100 deliver net/can/af_can.c:568 [inline] can_rcv_filter+0x292/0x8e0 net/can/af_can.c:602 can_receive+0x2e7/0x530 net/can/af_can.c:659 can_rcv+0x133/0x1b0 net/can/af_can.c:685 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:4929 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5043 process_backlog+0x206/0x750 net/core/dev.c:5874 napi_poll net/core/dev.c:6311 [inline] net_rx_action+0x508/0x1120 net/core/dev.c:6379 __do_softirq+0x262/0x98c kernel/softirq.c:292 The buggy address belongs to the object at ffff888098b24000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 4224 bytes inside of 8192-byte region [ffff888098b24000, ffff888098b26000) The buggy address belongs to the page: page:ffffea000262c900 refcount:1 mapcount:0 mapping:ffff8880aa4021c0 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea0002649c08 ffffea00025c0508 ffff8880aa4021c0 raw: 0000000000000000 ffff888098b24000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888098b24f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888098b25000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888098b25080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888098b25100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888098b25180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================