Bluetooth: Invalid header checksum
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BUG: KASAN: use-after-free in __read_once_size /./include/linux/compiler.h:183 [inline]
BUG: KASAN: use-after-free in atomic_read /./arch/x86/include/asm/atomic.h:27 [inline]
BUG: KASAN: use-after-free in refcount_read /./include/linux/refcount.h:42 [inline]
BUG: KASAN: use-after-free in skb_unref /./include/linux/skbuff.h:952 [inline]
BUG: KASAN: use-after-free in kfree_skb+0x2e9/0x340 /net/core/skbuff.c:659
Read of size 4 at addr ffff8880a0168b24 by task kworker/u4:6/8999

CPU: 1 PID: 8999 Comm: kworker/u4:6 Not tainted 4.14.134 #29
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound flush_to_ldisc
Call Trace:
 __dump_stack /lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c /lib/dump_stack.c:53
 print_address_description.cold+0x7c/0x1dc /mm/kasan/report.c:252
 kasan_report_error /mm/kasan/report.c:351 [inline]
 kasan_report /mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xa9/0x2af /mm/kasan/report.c:393
 __asan_report_load4_noabort+0x14/0x20 /mm/kasan/report.c:429
 __read_once_size /./include/linux/compiler.h:183 [inline]
 atomic_read /./arch/x86/include/asm/atomic.h:27 [inline]
 refcount_read /./include/linux/refcount.h:42 [inline]
 skb_unref /./include/linux/skbuff.h:952 [inline]
 kfree_skb+0x2e9/0x340 /net/core/skbuff.c:659
 h5_reset_rx+0x4c/0x100 /drivers/bluetooth/hci_h5.c:499
 h5_rx_3wire_hdr+0x2af/0x370 /drivers/bluetooth/hci_h5.c:409
 h5_recv+0x25c/0x3f0 /drivers/bluetooth/hci_h5.c:532
 hci_uart_tty_receive+0x1f4/0x4d0 /drivers/bluetooth/hci_ldisc.c:603
 tty_ldisc_receive_buf+0x14d/0x1a0 /drivers/tty/tty_buffer.c:459
 tty_port_default_receive_buf+0x73/0xa0 /drivers/tty/tty_port.c:37
 receive_buf /drivers/tty/tty_buffer.c:475 [inline]
 flush_to_ldisc+0x1ec/0x400 /drivers/tty/tty_buffer.c:527
 process_one_work+0x863/0x1600 /kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 /kernel/workqueue.c:2248
 kthread+0x319/0x430 /kernel/kthread.c:232
 ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:404

Allocated by task 8999:
 save_stack_trace+0x16/0x20 /arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 /mm/kasan/kasan.c:447
 set_track /mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc /mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xce/0xf0 /mm/kasan/kasan.c:529
 kasan_slab_alloc+0xf/0x20 /mm/kasan/kasan.c:489
 kmem_cache_alloc_node+0x144/0x780 /mm/slab.c:3642
 __alloc_skb+0x9c/0x500 /net/core/skbuff.c:193
 alloc_skb /./include/linux/skbuff.h:980 [inline]
 bt_skb_alloc /./include/net/bluetooth/bluetooth.h:336 [inline]
 h5_rx_pkt_start+0xc2/0x260 /drivers/bluetooth/hci_h5.c:443
 h5_recv+0x25c/0x3f0 /drivers/bluetooth/hci_h5.c:532
 hci_uart_tty_receive+0x1f4/0x4d0 /drivers/bluetooth/hci_ldisc.c:603
 tty_ldisc_receive_buf+0x14d/0x1a0 /drivers/tty/tty_buffer.c:459
 tty_port_default_receive_buf+0x73/0xa0 /drivers/tty/tty_port.c:37
 receive_buf /drivers/tty/tty_buffer.c:475 [inline]
 flush_to_ldisc+0x1ec/0x400 /drivers/tty/tty_buffer.c:527
 process_one_work+0x863/0x1600 /kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 /kernel/workqueue.c:2248
 kthread+0x319/0x430 /kernel/kthread.c:232
 ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:404

Freed by task 9032:
 save_stack_trace+0x16/0x20 /arch/x86/kernel/stacktrace.c:59
 save_stack+0x45/0xd0 /mm/kasan/kasan.c:447
 set_track /mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x75/0xc0 /mm/kasan/kasan.c:524
 __cache_free /mm/slab.c:3496 [inline]
 kmem_cache_free+0x83/0x2b0 /mm/slab.c:3758
 kfree_skbmem /net/core/skbuff.c:586 [inline]
 kfree_skbmem+0xac/0x120 /net/core/skbuff.c:580
 __kfree_skb /net/core/skbuff.c:646 [inline]
 kfree_skb+0xbd/0x340 /net/core/skbuff.c:663
 h5_reset_rx+0x4c/0x100 /drivers/bluetooth/hci_h5.c:499
 h5_rx_3wire_hdr+0x2af/0x370 /drivers/bluetooth/hci_h5.c:409
 h5_recv+0x25c/0x3f0 /drivers/bluetooth/hci_h5.c:532
 hci_uart_tty_receive+0x1f4/0x4d0 /drivers/bluetooth/hci_ldisc.c:603
 tiocsti /drivers/tty/tty_io.c:2186 [inline]
 tty_ioctl+0xded/0x1320 /drivers/tty/tty_io.c:2572
 vfs_ioctl /fs/ioctl.c:46 [inline]
 file_ioctl /fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x7ae/0x1060 /fs/ioctl.c:684
 SYSC_ioctl /fs/ioctl.c:701 [inline]
 SyS_ioctl+0x8f/0xc0 /fs/ioctl.c:692
 do_syscall_64+0x1e8/0x640 /arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

The buggy address belongs to the object at ffff8880a0168a40
 which belongs to the cache skbuff_head_cache of size 232
The buggy address is located 228 bytes inside of
 232-byte region [ffff8880a0168a40, ffff8880a0168b28)
The buggy address belongs to the page:
page:ffffea0002805a00 count:1 mapcount:0 mapping:ffff8880a0168040 index:0xffff8880a0168680
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffff8880a0168040 ffff8880a0168680 000000010000000b
raw: ffffea000271b6e0 ffffea0002940020 ffff88821b757240 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a0168a00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8880a0168a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880a0168b00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff8880a0168b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880a0168c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
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