==================================================================
BUG: KASAN: slab-use-after-free in hci_conn_hash_flush+0x1f9/0x230
Read of size 8 at addr ffff8880433c6000 by task syz-executor.2/1011
CPU: 0 PID: 1011 Comm: syz-executor.2 Not tainted 6.3.0-rc3-next-20230324 #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+0x1f9/0x230
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: 0033:0x7ff4cfb1fb19
Code: Unable to access opcode bytes at 0x7ff4cfb1faef.
RSP: 002b:00007ffe0243e188 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00000000000004dc RCX: 00007ff4cfb1fb19
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043
RBP: 0000000000000000 R08: 0000000000000014 R09: 00000000000004dc
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff4cfb7a0c3
R13: 0000000000000000 R14: 0000000000000004 R15: 00007ffe0243e370
Allocated by task 4809:
kasan_save_stack+0x22/0x50
kasan_set_track+0x25/0x30
__kasan_kmalloc+0x7f/0x90
hci_conn_add+0xa3/0x1470
hci_connect_sco+0x422/0x9d0
sco_sock_connect+0x358/0xa60
__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 1011:
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+0x28f/0x940
hci_conn_del+0x6cf/0x940
hci_conn_hash_flush+0x195/0x230
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
The buggy address belongs to the object at ffff8880433c6000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 0 bytes inside of
freed 4096-byte region [ffff8880433c6000, ffff8880433c7000)
The buggy address belongs to the physical page:
page:00000000e4ecffc5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x433c0
head:00000000e4ecffc5 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:
ffff8880433c5f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880433c5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880433c6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880433c6080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880433c6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
general protection fault, probably for non-canonical address 0xe0e03c45e000007e: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x0702022f000003f0-0x0702022f000003f7]
CPU: 0 PID: 1011 Comm: syz-executor.2 Tainted: G B 6.3.0-rc3-next-20230324 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
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:ffff8880133bfb08 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0702022f000003f3 RCX: ffffffff83d86003
RDX: 00e04045e000007e RSI: 0000000000000008 RDI: ffff88800971c4c8
RBP: ffff8880433c6000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800971c4c0
R13: ffff8880433c6240 R14: dffffc0000000000 R15: ffff888016984000
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffecf860f78 CR3: 000000000e1fe000 CR4: 0000000000350ef0
Call Trace:
hci_conn_del+0x28f/0x940
hci_conn_hash_flush+0x195/0x230
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: 0033:0x7ff4cfb1fb19
Code: Unable to access opcode bytes at 0x7ff4cfb1faef.
RSP: 002b:00007ffe0243e188 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00000000000004dc RCX: 00007ff4cfb1fb19
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043
RBP: 0000000000000000 R08: 0000000000000014 R09: 00000000000004dc
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff4cfb7a0c3
R13: 0000000000000000 R14: 0000000000000004 R15: 00007ffe0243e370
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:ffff8880133bfb08 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0702022f000003f3 RCX: ffffffff83d86003
RDX: 00e04045e000007e RSI: 0000000000000008 RDI: ffff88800971c4c8
RBP: ffff8880433c6000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800971c4c0
R13: ffff8880433c6240 R14: dffffc0000000000 R15: ffff888016984000
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffecf860f78 CR3: 000000000e1fe000 CR4: 0000000000350ef0
Fixing recursive fault but reboot is needed!
BUG: scheduling while atomic: syz-executor.2/1011/0x00000000
INFO: lockdep is turned off.
Modules linked in:
CPU: 0 PID: 1011 Comm: syz-executor.2 Tainted: G B D 6.3.0-rc3-next-20230324 #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: 0033:0x7ff4cfb1fb19
Code: Unable to access opcode bytes at 0x7ff4cfb1faef.
RSP: 002b:00007ffe0243e188 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00000000000004dc RCX: 00007ff4cfb1fb19
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043
RBP: 0000000000000000 R08: 0000000000000014 R09: 00000000000004dc
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff4cfb7a0c3
R13: 0000000000000000 R14: 0000000000000004 R15: 00007ffe0243e370
----------------
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