Bluetooth: Error in BCSP hdr checksum
Bluetooth: hci0: command 0x1001 tx timeout
Bluetooth: hci0: sending frame failed (-49)
Bluetooth: hci0: command 0x1009 tx timeout
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BUG: KASAN: use-after-free in atomic_read include/asm-generic/atomic-instrumented.h:21 [inline]
BUG: KASAN: use-after-free in refcount_read include/linux/refcount.h:43 [inline]
BUG: KASAN: use-after-free in skb_unref include/linux/skbuff.h:967 [inline]
BUG: KASAN: use-after-free in kfree_skb+0x38/0x390 net/core/skbuff.c:659
Read of size 4 at addr ffff888098b4cd64 by task syz-executor.5/21625
CPU: 0 PID: 21625 Comm: syz-executor.5 Not tainted 4.19.80 #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+0x172/0x1f0 lib/dump_stack.c:113
print_address_description.cold+0x7c/0x20d mm/kasan/report.c:256
kasan_report_error mm/kasan/report.c:354 [inline]
kasan_report mm/kasan/report.c:412 [inline]
kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396
check_memory_region_inline mm/kasan/kasan.c:260 [inline]
check_memory_region+0x123/0x190 mm/kasan/kasan.c:267
kasan_check_read+0x11/0x20 mm/kasan/kasan.c:272
atomic_read include/asm-generic/atomic-instrumented.h:21 [inline]
refcount_read include/linux/refcount.h:43 [inline]
skb_unref include/linux/skbuff.h:967 [inline]
kfree_skb+0x38/0x390 net/core/skbuff.c:659
bcsp_close+0xc7/0x130 drivers/bluetooth/hci_bcsp.c:763
hci_uart_tty_close+0x1ea/0x250 drivers/bluetooth/hci_ldisc.c:555
tty_ldisc_close.isra.0+0xaf/0xe0 drivers/tty/tty_ldisc.c:486
tty_ldisc_kill+0x4b/0xc0 drivers/tty/tty_ldisc.c:632
tty_ldisc_release+0xc6/0x280 drivers/tty/tty_ldisc.c:799
tty_release_struct+0x1b/0x50 drivers/tty/tty_io.c:1611
tty_release+0xbcb/0xe90 drivers/tty/tty_io.c:1784
__fput+0x2dd/0x8b0 fs/file_table.c:278
____fput+0x16/0x20 fs/file_table.c:309
task_work_run+0x145/0x1c0 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0x994/0x2fa0 kernel/exit.c:876
do_group_exit+0x135/0x370 kernel/exit.c:979
get_signal+0x3ec/0x1fc0 kernel/signal.c:2574
do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821
exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459a59
Code: 70 c0 00 48 83 fb 10 7c 6e 49 c7 c4 00 00 00 00 48 89 f7 48 83 fb 20 0f 87 c8 00 00 00 48 8d 44 1e f0 eb 17 f3 0f 6f 0f 66 0f <74> c8 66 0f d7 d1 f3 0f b8 d2 49 01 d4 48 83 c7 10 48 39 c7 76 e4
RSP: 002b:00007fb8d0686c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000c8
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000459a59
RDX: 0000000000000000 RSI: 0001002000000013 RDI: 000000000000023c
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb8d06876d4
R13: 00000000004c94f7 R14: 00000000004e0cd0 R15: 00000000ffffffff
Allocated by task 2344:
save_stack+0x45/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
kasan_kmalloc mm/kasan/kasan.c:553 [inline]
kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531
kasan_slab_alloc+0xf/0x20 mm/kasan/kasan.c:490
kmem_cache_alloc_node+0x144/0x710 mm/slab.c:3649
__alloc_skb+0xd5/0x5f0 net/core/skbuff.c:193
alloc_skb include/linux/skbuff.h:995 [inline]
bt_skb_alloc include/net/bluetooth/bluetooth.h:339 [inline]
bcsp_recv+0x8c7/0x13a0 drivers/bluetooth/hci_bcsp.c:685
hci_uart_tty_receive+0x225/0x530 drivers/bluetooth/hci_ldisc.c:620
tty_ldisc_receive_buf+0x15f/0x1c0 drivers/tty/tty_buffer.c:460
tty_port_default_receive_buf+0x7d/0xb0 drivers/tty/tty_port.c:38
receive_buf drivers/tty/tty_buffer.c:476 [inline]
flush_to_ldisc+0x222/0x390 drivers/tty/tty_buffer.c:528
process_one_work+0x989/0x1750 kernel/workqueue.c:2153
worker_thread+0x98/0xe40 kernel/workqueue.c:2296
kthread+0x354/0x420 kernel/kthread.c:246
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Freed by task 2344:
save_stack+0x45/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
__cache_free mm/slab.c:3503 [inline]
kmem_cache_free+0x86/0x260 mm/slab.c:3765
kfree_skbmem net/core/skbuff.c:586 [inline]
kfree_skbmem+0xcb/0x150 net/core/skbuff.c:580
__kfree_skb net/core/skbuff.c:646 [inline]
kfree_skb net/core/skbuff.c:663 [inline]
kfree_skb+0xf0/0x390 net/core/skbuff.c:657
bcsp_recv+0x2d8/0x13a0 drivers/bluetooth/hci_bcsp.c:623
hci_uart_tty_receive+0x225/0x530 drivers/bluetooth/hci_ldisc.c:620
tty_ldisc_receive_buf+0x15f/0x1c0 drivers/tty/tty_buffer.c:460
tty_port_default_receive_buf+0x7d/0xb0 drivers/tty/tty_port.c:38
receive_buf drivers/tty/tty_buffer.c:476 [inline]
flush_to_ldisc+0x222/0x390 drivers/tty/tty_buffer.c:528
process_one_work+0x989/0x1750 kernel/workqueue.c:2153
worker_thread+0x98/0xe40 kernel/workqueue.c:2296
kthread+0x354/0x420 kernel/kthread.c:246
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
The buggy address belongs to the object at ffff888098b4cc80
which belongs to the cache skbuff_head_cache of size 232
The buggy address is located 228 bytes inside of
232-byte region [ffff888098b4cc80, ffff888098b4cd68)
The buggy address belongs to the page:
page:ffffea000262d300 count:1 mapcount:0 mapping:ffff8880aa347ac0 index:0xffff888098b4c8c0
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffffea000259d008 ffffea0002530148 ffff8880aa347ac0
raw: ffff888098b4c8c0 ffff888098b4c000 0000000100000008 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888098b4cc00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
ffff888098b4cc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888098b4cd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
^
ffff888098b4cd80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
ffff888098b4ce00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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