IPVS: ftp: loaded support on port[0] = 21
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BUG: KASAN: use-after-free in hci_chan_del+0x14f/0x190 net/bluetooth/hci_conn.c:1707
Read of size 8 at addr ffff88809e507a18 by task syz-executor003/6822
CPU: 1 PID: 6822 Comm: syz-executor003 Not tainted 5.8.0-rc7-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+0x18f/0x20d lib/dump_stack.c:118
print_address_description.constprop.0.cold+0xae/0x436 mm/kasan/report.c:383
__kasan_report mm/kasan/report.c:513 [inline]
kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
hci_chan_del+0x14f/0x190 net/bluetooth/hci_conn.c:1707
l2cap_conn_del+0x61b/0x9e0 net/bluetooth/l2cap_core.c:1900
l2cap_disconn_cfm net/bluetooth/l2cap_core.c:8159 [inline]
l2cap_disconn_cfm+0x85/0xa0 net/bluetooth/l2cap_core.c:8152
hci_disconn_cfm include/net/bluetooth/hci_core.h:1355 [inline]
hci_conn_hash_flush+0x114/0x220 net/bluetooth/hci_conn.c:1536
hci_dev_do_close+0x5c6/0x1080 net/bluetooth/hci_core.c:1761
hci_unregister_dev+0x1a3/0xe20 net/bluetooth/hci_core.c:3606
vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:340
__fput+0x33c/0x880 fs/file_table.c:281
task_work_run+0xdd/0x190 kernel/task_work.c:135
exit_task_work include/linux/task_work.h:25 [inline]
do_exit+0xb72/0x2a40 kernel/exit.c:805
do_group_exit+0x125/0x310 kernel/exit.c:903
__do_sys_exit_group kernel/exit.c:914 [inline]
__se_sys_exit_group kernel/exit.c:912 [inline]
__x64_sys_exit_group+0x3a/0x50 kernel/exit.c:912
do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x444fe8
Code: Bad RIP value.
RSP: 002b:00007ffe7ecfe498 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000444fe8
RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00000000004ccdd0 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 00007ff8654309d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006e0200 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 6843:
save_stack+0x1b/0x40 mm/kasan/common.c:48
set_track mm/kasan/common.c:56 [inline]
__kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494
kmem_cache_alloc_trace+0x14f/0x2d0 mm/slab.c:3551
kmalloc include/linux/slab.h:555 [inline]
kzalloc include/linux/slab.h:669 [inline]
hci_chan_create+0x9b/0x330 net/bluetooth/hci_conn.c:1692
l2cap_conn_add.part.0+0x1e/0xe10 net/bluetooth/l2cap_core.c:7699
l2cap_conn_add net/bluetooth/l2cap_core.c:8139 [inline]
l2cap_connect_cfm+0x23b/0x1090 net/bluetooth/l2cap_core.c:8097
hci_connect_cfm include/net/bluetooth/hci_core.h:1340 [inline]
hci_remote_features_evt net/bluetooth/hci_event.c:3210 [inline]
hci_event_packet+0x3e01/0x86f5 net/bluetooth/hci_event.c:6061
hci_rx_work+0x22e/0xb10 net/bluetooth/hci_core.c:4705
process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
kthread+0x3b5/0x4a0 kernel/kthread.c:291
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Freed by task 6843:
save_stack+0x1b/0x40 mm/kasan/common.c:48
set_track mm/kasan/common.c:56 [inline]
kasan_set_free_info mm/kasan/common.c:316 [inline]
__kasan_slab_free+0xf5/0x140 mm/kasan/common.c:455
__cache_free mm/slab.c:3426 [inline]
kfree+0x103/0x2c0 mm/slab.c:3757
hci_disconn_loglink_complete_evt net/bluetooth/hci_event.c:4999 [inline]
hci_event_packet+0x319a/0x86f5 net/bluetooth/hci_event.c:6188
hci_rx_work+0x22e/0xb10 net/bluetooth/hci_core.c:4705
process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
kthread+0x3b5/0x4a0 kernel/kthread.c:291
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
The buggy address belongs to the object at ffff88809e507a00
which belongs to the cache kmalloc-128 of size 128
The buggy address is located 24 bytes inside of
128-byte region [ffff88809e507a00, ffff88809e507a80)
The buggy address belongs to the page:
page:ffffea00027941c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88809e507700
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002845008 ffffea000248f0c8 ffff8880aa000700
raw: ffff88809e507700 ffff88809e507000 0000000100000008 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88809e507900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88809e507980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88809e507a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88809e507a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88809e507b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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