==================================================================
BUG: KASAN: slab-use-after-free in hci_conn_del+0x23e/0x810
Read of size 1 at addr ffff88803cb1e039 by task kworker/u5:0/102106
CPU: 0 PID: 102106 Comm: kworker/u5:0 Not tainted 6.3.0-next-20230426 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Workqueue: hci3 hci_rx_work
Call Trace:
dump_stack_lvl+0x91/0xf0
print_report+0xcc/0x620
kasan_report+0xc0/0xf0
hci_conn_del+0x23e/0x810
hci_conn_complete_evt+0x819/0xf40
hci_event_packet+0x91d/0xf60
hci_rx_work+0xa86/0x1110
process_one_work+0xa20/0x1660
worker_thread+0x64f/0x12a0
kthread+0x33f/0x440
ret_from_fork+0x2c/0x50
Allocated by task 557886:
kasan_save_stack+0x22/0x50
kasan_set_track+0x25/0x30
__kasan_kmalloc+0x7f/0x90
hci_conn_add+0xa3/0x14d0
hci_connect_sco+0x3e7/0x1120
sco_sock_connect+0x2c0/0x9c0
__sys_connect_file+0x159/0x1a0
__sys_connect+0x169/0x1a0
__x64_sys_connect+0x73/0xb0
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
Freed by task 102106:
kasan_save_stack+0x22/0x50
kasan_set_track+0x25/0x30
kasan_save_free_info+0x2e/0x50
__kasan_slab_free+0x10a/0x190
__kmem_cache_free+0xd1/0x2f0
device_release+0xa6/0x240
kobject_put+0x177/0x270
put_device+0x1f/0x30
hci_conn_del+0x29f/0x810
hci_conn_unlink+0x211/0x390
hci_conn_del+0x109/0x810
hci_conn_complete_evt+0x819/0xf40
hci_event_packet+0x91d/0xf60
hci_rx_work+0xa86/0x1110
process_one_work+0xa20/0x1660
worker_thread+0x64f/0x12a0
kthread+0x33f/0x440
ret_from_fork+0x2c/0x50
Last potentially related work creation:
kasan_save_stack+0x22/0x50
__kasan_record_aux_stack+0x95/0xb0
__queue_work+0x622/0x12f0
__queue_delayed_work+0x1c8/0x270
queue_delayed_work_on+0xcd/0xd0
sco_chan_del+0x1db/0x440
__sco_sock_close+0x21e/0x770
sco_sock_release+0xa1/0x400
__sock_release+0xd2/0x2a0
sock_close+0x1c/0x30
__fput+0x263/0xa40
task_work_run+0x174/0x280
get_signal+0x1d3/0x26c0
arch_do_signal_or_restart+0x79/0x590
exit_to_user_mode_prepare+0xeb/0x180
syscall_exit_to_user_mode+0x1d/0x50
do_syscall_64+0x4c/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
Second to last potentially related work creation:
kasan_save_stack+0x22/0x50
__kasan_record_aux_stack+0x95/0xb0
__queue_work+0x622/0x12f0
queue_work_on+0xb6/0xc0
rcu_core+0x899/0x2750
__do_softirq+0x1b7/0x7d4
The buggy address belongs to the object at ffff88803cb1e000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 57 bytes inside of
freed 4096-byte region [ffff88803cb1e000, ffff88803cb1f000)
The buggy address belongs to the physical page:
page:000000006569f09b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3cb18
head:000000006569f09b order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0x100000000010200(slab|head|node=0|zone=1)
page_type: 0xffffffff()
raw: 0100000000010200 ffff888008442140 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88803cb1df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88803cb1df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88803cb1e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88803cb1e080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88803cb1e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
general protection fault, probably for non-canonical address 0xe0b03c72e00031db: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x0582039700018ed8-0x0582039700018edf]
CPU: 0 PID: 102106 Comm: kworker/u5:0 Tainted: G B 6.3.0-next-20230426 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Workqueue: hci3 hci_rx_work
RIP: 0010:hci_conn_cleanup+0x1c5/0x780
Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ef 04 00 00 48 89 da 49 89 5c 24 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 ab 04 00 00 48 b8 22 01 00 00 00 00 ad de 4c 89
RSP: 0018:ffff88804e0dfa38 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0582039700018eda RCX: ffffffff83daa5e3
RDX: 00b04072e00031db RSI: 0000000000000008 RDI: ffff8880329df908
RBP: ffff88803cb1e000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880329df900
R13: ffff88803cb1e260 R14: dffffc0000000000 R15: ffff8880337d0000
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8c6117a718 CR3: 0000000015bf0000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000600
Call Trace:
hci_conn_del+0x29f/0x810
hci_conn_complete_evt+0x819/0xf40
hci_event_packet+0x91d/0xf60
hci_rx_work+0xa86/0x1110
process_one_work+0xa20/0x1660
worker_thread+0x64f/0x12a0
kthread+0x33f/0x440
ret_from_fork+0x2c/0x50
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hci_conn_cleanup+0x1c5/0x780
Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ef 04 00 00 48 89 da 49 89 5c 24 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 ab 04 00 00 48 b8 22 01 00 00 00 00 ad de 4c 89
RSP: 0018:ffff88804e0dfa38 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0582039700018eda RCX: ffffffff83daa5e3
RDX: 00b04072e00031db RSI: 0000000000000008 RDI: ffff8880329df908
RBP: ffff88803cb1e000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880329df900
R13: ffff88803cb1e260 R14: dffffc0000000000 R15: ffff8880337d0000
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8c6117a718 CR3: 0000000015bf0000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000600
------------[ cut here ]------------
WARNING: CPU: 0 PID: 102106 at kernel/kcov.c:466 kcov_task_exit+0xba/0xd0
Modules linked in:
CPU: 0 PID: 102106 Comm: kworker/u5:0 Tainted: G B D 6.3.0-next-20230426 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Workqueue: hci3 hci_rx_work
RIP: 0010:kcov_task_exit+0xba/0xd0
Code: 89 e6 e8 19 36 00 03 48 89 ef 5b 5d 41 5c 41 5d e9 6b ea ff ff 48 89 ef e8 83 e7 ff ff eb dd 5b 5d 41 5c 41 5d e9 6a 60 00 03 <0f> 0b 5b 4c 89 ef 5d 48 89 c6 41 5c 41 5d e9 e3 35 00 03 0f 1f 00
RSP: 0018:ffff88804e0dfe18 EFLAGS: 00010002
RAX: 0000000000000286 RBX: ffff888041b20000 RCX: ffffffff812e0465
RDX: 1ffff1100989d7a3 RSI: 0000000000000004 RDI: ffff88804e0dfd88
RBP: ffff88804c4ebd00 R08: 0000000000000001 R09: ffff88804e0dfd8b
R10: ffffed1009c1bfb1 R11: 0000000000000001 R12: 0000000000000286
R13: ffff88804c4ebd08 R14: 000000000000000b R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8c6117a718 CR3: 0000000015bf0000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000600
Call Trace:
do_exit+0x249/0x2720
make_task_dead+0x175/0x3b0
rewind_stack_and_make_dead+0x17/0x20
RIP: 0000:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
irq event stamp: 15585
hardirqs last enabled at (15585): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20
hardirqs last disabled at (15584): [] __do_softirq+0x665/0x7d4
softirqs last enabled at (15088): [] __irq_exit_rcu+0xcc/0x110
softirqs last disabled at (15081): [] __irq_exit_rcu+0xcc/0x110
---[ end trace 0000000000000000 ]---
EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. Quota mode: writeback.
EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. Quota mode: writeback.
EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. Quota mode: writeback.
EXT4-fs (sda): re-mounted 7b5d9a40-9011-49ec-8035-27953f97a4d8. Quota mode: writeback.
netlink: 280 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 280 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 280 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 280 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'.
9pnet_fd: Insufficient options for proto=fd
netlink: 'syz-executor.3': attribute type 5 has an invalid length.
----------------
Code disassembly (best guess), 2 bytes skipped:
0: df 48 89 fisttps -0x77(%rax)
3: fa cli
4: 48 c1 ea 03 shr $0x3,%rdx
8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
c: 0f 85 ef 04 00 00 jne 0x501
12: 48 89 da mov %rbx,%rdx
15: 49 89 5c 24 08 mov %rbx,0x8(%r12)
1a: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
21: fc ff df
24: 48 c1 ea 03 shr $0x3,%rdx
* 28: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2c: 0f 85 ab 04 00 00 jne 0x4dd
32: 48 b8 22 01 00 00 00 movabs $0xdead000000000122,%rax
39: 00 ad de
3c: 4c rex.WR
3d: 89 .byte 0x89