vcan0: j1939_tp_rxtimer: 0x00000000c847bbfb: abort rx timeout. Force session deactivation
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BUG: KASAN: use-after-free in __run_hrtimer kernel/time/hrtimer.c:1521 [inline]
BUG: KASAN: use-after-free in __hrtimer_run_queues+0x7c2/0x9b0 kernel/time/hrtimer.c:1583
Read of size 1 at addr ffff88809db8c173 by task ksoftirqd/1/16

CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.6.0-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+0x1e9/0x30e lib/dump_stack.c:118
 print_address_description+0x74/0x5c0 mm/kasan/report.c:374
 __kasan_report+0x14b/0x1c0 mm/kasan/report.c:506
 kasan_report+0x25/0x50 mm/kasan/common.c:641
 __run_hrtimer kernel/time/hrtimer.c:1521 [inline]
 __hrtimer_run_queues+0x7c2/0x9b0 kernel/time/hrtimer.c:1583
 hrtimer_run_softirq+0x15a/0x1b0 kernel/time/hrtimer.c:1600
 __do_softirq+0x268/0x80c kernel/softirq.c:292
 run_ksoftirqd+0x60/0xf0 kernel/softirq.c:603
 smpboot_thread_fn+0x572/0x970 kernel/smpboot.c:165
 kthread+0x353/0x380 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Allocated by task 8407:
 save_stack mm/kasan/common.c:72 [inline]
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc+0x118/0x1c0 mm/kasan/common.c:515
 kmem_cache_alloc_trace+0x234/0x300 mm/slab.c:3551
 kmalloc include/linux/slab.h:555 [inline]
 kzalloc include/linux/slab.h:669 [inline]
 j1939_session_new+0x75/0x340 net/can/j1939/transport.c:1418
 j1939_session_fresh_new net/can/j1939/transport.c:1469 [inline]
 j1939_xtp_rx_rts_session_new net/can/j1939/transport.c:1552 [inline]
 j1939_xtp_rx_rts+0x1050/0x20c0 net/can/j1939/transport.c:1653
 j1939_tp_cmd_recv net/can/j1939/transport.c:1924 [inline]
 j1939_tp_recv+0x81f/0xb80 net/can/j1939/transport.c:2005
 j1939_can_recv+0x479/0x6e0 net/can/j1939/main.c:101
 deliver net/can/af_can.c:569 [inline]
 can_rcv_filter+0x37f/0x850 net/can/af_can.c:603
 can_receive+0x2ad/0x3b0 net/can/af_can.c:660
 can_rcv+0xdc/0x210 net/can/af_can.c:686
 __netif_receive_skb_one_core net/core/dev.c:5187 [inline]
 __netif_receive_skb+0x136/0x370 net/core/dev.c:5301
 process_backlog+0x4e8/0x950 net/core/dev.c:6133
 napi_poll net/core/dev.c:6571 [inline]
 net_rx_action+0x62f/0x1140 net/core/dev.c:6639
 __do_softirq+0x268/0x80c kernel/softirq.c:292

Freed by task 16:
 save_stack mm/kasan/common.c:72 [inline]
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:337 [inline]
 __kasan_slab_free+0x12e/0x1e0 mm/kasan/common.c:476
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x10a/0x220 mm/slab.c:3757
 j1939_tp_rxtimer+0x27b/0x330 net/can/j1939/transport.c:1194
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x48e/0x9b0 kernel/time/hrtimer.c:1583
 hrtimer_run_softirq+0x15a/0x1b0 kernel/time/hrtimer.c:1600
 __do_softirq+0x268/0x80c kernel/softirq.c:292

The buggy address belongs to the object at ffff88809db8c000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 371 bytes inside of
 512-byte region [ffff88809db8c000, ffff88809db8c200)
The buggy address belongs to the page:
page:ffffea000276e300 refcount:1 mapcount:0 mapping:ffff8880aa400a80 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea000266fac8 ffffea0002605c48 ffff8880aa400a80
raw: 0000000000000000 ffff88809db8c000 0000000100000004 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809db8c000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88809db8c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88809db8c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff88809db8c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88809db8c200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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