==================================================================
BUG: KASAN: slab-use-after-free in hci_conn_hash_flush+0x201/0x240
Read of size 8 at addr ffff88800fc72000 by task syz-executor.5/44081
CPU: 0 PID: 44081 Comm: syz-executor.5 Not tainted 6.3.0-rc7-next-20230418 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0x91/0xf0
print_report+0xcc/0x620
kasan_report+0xc0/0xf0
hci_conn_hash_flush+0x201/0x240
hci_dev_close_sync+0x57f/0xff0
hci_unregister_dev+0x15e/0x410
vhci_release+0x80/0x100
__fput+0x263/0xa40
task_work_run+0x174/0x280
do_exit+0xad8/0x2720
do_group_exit+0xd4/0x2a0
__x64_sys_exit_group+0x3e/0x50
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f6be10ccb19
Code: Unable to access opcode bytes at 0x7f6be10ccaef.
RSP: 002b:00007ffc5cb2f438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000033 RCX: 00007f6be10ccb19
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043
RBP: 0000000000000000 R08: 0000000000000014 R09: 0000000000000033
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6be11270c3
R13: 0000000000000000 R14: 0000000000000008 R15: 00007ffc5cb2f620
Allocated by task 45007:
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 44081:
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_unlink+0x2a3/0x390
hci_conn_hash_flush+0x195/0x240
hci_dev_close_sync+0x57f/0xff0
hci_unregister_dev+0x15e/0x410
vhci_release+0x80/0x100
__fput+0x263/0xa40
task_work_run+0x174/0x280
do_exit+0xad8/0x2720
do_group_exit+0xd4/0x2a0
__x64_sys_exit_group+0x3e/0x50
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
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 ffff88800fc72000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 0 bytes inside of
freed 4096-byte region [ffff88800fc72000, ffff88800fc73000)
The buggy address belongs to the physical page:
page:000000007957eec5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc70
head:000000007957eec5 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x100000000010200(slab|head|node=0|zone=1)
page_type: 0xffffffff()
raw: 0100000000010200 ffff888008442140 ffffea0000655400 dead000000000002
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88800fc71f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88800fc71f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88800fc72000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88800fc72080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88800fc72100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
general protection fault, probably for non-canonical address 0xe0ecdc6060001586: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x076703030000ac30-0x076703030000ac37]
CPU: 0 PID: 44081 Comm: syz-executor.5 Tainted: G B 6.3.0-rc7-next-20230418 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
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:ffff888032dafb08 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 076703030000ac31 RCX: ffffffff83d9fc33
RDX: 00ece06060001586 RSI: 0000000000000008 RDI: ffff88800f0914c8
RBP: ffff88800fc72000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800f0914c0
R13: ffff88800fc72260 R14: dffffc0000000000 R15: ffff888036e84000
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200c3000 CR3: 0000000015ae8000 CR4: 0000000000350ef0
DR0: 0001000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
hci_conn_del+0x29f/0x810
hci_conn_hash_flush+0x19d/0x240
hci_dev_close_sync+0x57f/0xff0
hci_unregister_dev+0x15e/0x410
vhci_release+0x80/0x100
__fput+0x263/0xa40
task_work_run+0x174/0x280
do_exit+0xad8/0x2720
do_group_exit+0xd4/0x2a0
__x64_sys_exit_group+0x3e/0x50
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f6be10ccb19
Code: Unable to access opcode bytes at 0x7f6be10ccaef.
RSP: 002b:00007ffc5cb2f438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000033 RCX: 00007f6be10ccb19
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043
RBP: 0000000000000000 R08: 0000000000000014 R09: 0000000000000033
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6be11270c3
R13: 0000000000000000 R14: 0000000000000008 R15: 00007ffc5cb2f620
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:ffff888032dafb08 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 076703030000ac31 RCX: ffffffff83d9fc33
RDX: 00ece06060001586 RSI: 0000000000000008 RDI: ffff88800f0914c8
RBP: ffff88800fc72000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800f0914c0
R13: ffff88800fc72260 R14: dffffc0000000000 R15: ffff888036e84000
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200c3000 CR3: 0000000015ae8000 CR4: 0000000000350ef0
DR0: 0001000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Fixing recursive fault but reboot is needed!
BUG: scheduling while atomic: syz-executor.5/44081/0x00000000
INFO: lockdep is turned off.
Modules linked in:
CPU: 0 PID: 44081 Comm: syz-executor.5 Tainted: G B D 6.3.0-rc7-next-20230418 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xc1/0xf0
__schedule_bug+0xb9/0x100
__schedule+0x1df9/0x2a00
do_task_dead+0xd5/0x100
make_task_dead+0x36e/0x3b0
rewind_stack_and_make_dead+0x17/0x20
RIP: 0033:0x7f6be10ccb19
Code: Unable to access opcode bytes at 0x7f6be10ccaef.
RSP: 002b:00007ffc5cb2f438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000033 RCX: 00007f6be10ccb19
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043
RBP: 0000000000000000 R08: 0000000000000014 R09: 0000000000000033
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6be11270c3
R13: 0000000000000000 R14: 0000000000000008 R15: 00007ffc5cb2f620
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
----------------
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