vcan0: j1939_tp_rxtimer: 0x000000004a0b01be: 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+0xe18/0xf10 kernel/time/hrtimer.c:1583
Read of size 1 at addr ffff88806280ed73 by task syz-fuzzer/7002

CPU: 1 PID: 7002 Comm: syz-fuzzer Not tainted 5.6.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd3/0x315 mm/kasan/report.c:374
 __kasan_report.cold+0x1a/0x32 mm/kasan/report.c:506
 kasan_report+0xe/0x20 mm/kasan/common.c:641
 __run_hrtimer kernel/time/hrtimer.c:1521 [inline]
 __hrtimer_run_queues+0xe18/0xf10 kernel/time/hrtimer.c:1583
 hrtimer_run_softirq+0x16d/0x250 kernel/time/hrtimer.c:1600
 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x192/0x1d0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:546 [inline]
 smp_apic_timer_interrupt+0x19e/0x600 arch/x86/kernel/apic/apic.c:1140
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0033:0x43b69c
Code: 8b 44 24 40 31 c9 31 d2 eb 03 48 ff c1 48 89 54 24 18 48 8b 1d e5 18 c8 01 48 39 0d e6 18 c8 01 0f 8e dc 01 00 00 48 8b 1c cb <48> 85 db 74 db 8b 73 04 83 fe 01 0f 85 b7 01 00 00 8b 7b 10 44 8b
RSP: 002b:000000c000051f10 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
RAX: 00000164aa5cc158 RBX: 000000c00002c000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00007fff3fb69090 RDI: 000000000004a552
RBP: 000000c000051f40 R08: 00007fff3fb69080 R09: 00000000000005fb
R10: 000000c000051ed0 R11: 0000000000000202 R12: 00000000004338c0
R13: 0000000000000000 R14: 0000000000ac9ca8 R15: 0000000000000000

Allocated by task 21659:
 save_stack+0x1b/0x80 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc mm/kasan/common.c:515 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:488
 kmem_cache_alloc_trace+0x153/0x7d0 mm/slab.c:3551
 kmalloc include/linux/slab.h:555 [inline]
 kzalloc include/linux/slab.h:669 [inline]
 j1939_session_new+0x7c/0x3f0 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+0x898/0xef0 net/can/j1939/transport.c:1653
 j1939_tp_cmd_recv net/can/j1939/transport.c:1924 [inline]
 j1939_tp_recv+0x639/0x970 net/can/j1939/transport.c:2005
 j1939_can_recv+0x587/0x6f0 net/can/j1939/main.c:101
 deliver net/can/af_can.c:569 [inline]
 can_rcv_filter+0x2a1/0x8e0 net/can/af_can.c:603
 can_receive+0x2e3/0x520 net/can/af_can.c:660
 can_rcv+0x12a/0x1a0 net/can/af_can.c:686
 __netif_receive_skb_one_core+0xf5/0x160 net/core/dev.c:5187
 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5301
 process_backlog+0x21e/0x7a0 net/core/dev.c:6133
 napi_poll net/core/dev.c:6571 [inline]
 net_rx_action+0x4c2/0x1070 net/core/dev.c:6639
 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292

Freed by task 7002:
 save_stack+0x1b/0x80 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:337 [inline]
 __kasan_slab_free+0xf7/0x140 mm/kasan/common.c:476
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x109/0x2b0 mm/slab.c:3757
 j1939_session_destroy net/can/j1939/transport.c:276 [inline]
 __j1939_session_release net/can/j1939/transport.c:284 [inline]
 kref_put include/linux/kref.h:65 [inline]
 j1939_session_put+0x25c/0x330 net/can/j1939/transport.c:289
 j1939_tp_rxtimer+0x2e9/0x2f4 net/can/j1939/transport.c:1194
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x3a2/0xf10 kernel/time/hrtimer.c:1583
 hrtimer_run_softirq+0x16d/0x250 kernel/time/hrtimer.c:1600
 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292

The buggy address belongs to the object at ffff88806280ec00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 371 bytes inside of
 512-byte region [ffff88806280ec00, ffff88806280ee00)
The buggy address belongs to the page:
page:ffffea00018a0380 refcount:1 mapcount:0 mapping:ffff8880aa000a80 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002459f88 ffffea00012ff9c8 ffff8880aa000a80
raw: 0000000000000000 ffff88806280e000 0000000100000004 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88806280ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88806280ec80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88806280ed00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff88806280ed80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88806280ee00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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