==================================================================
BUG: KASAN: slab-use-after-free in hci_conn_hash_flush+0x1f9/0x230
Read of size 8 at addr ffff8880159a8000 by task syz-executor.4/274
CPU: 0 PID: 274 Comm: syz-executor.4 Not tainted 6.3.0-rc1-next-20230308 #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+0xad8/0x2800
do_group_exit+0xd4/0x2a0
__x64_sys_exit_group+0x3e/0x50
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7fafd8a8bb19
Code: Unable to access opcode bytes at 0x7fafd8a8baef.
RSP: 002b:00007ffefdf44c88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000031 RCX: 00007fafd8a8bb19
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043
RBP: 0000000000000000 R08: 0000000000000014 R09: 0000000000000031
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fafd8ae60c3
R13: 0000000000000000 R14: 0000000000000006 R15: 00007ffefdf44e70
Allocated by task 4307:
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 274:
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+0xad8/0x2800
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 ffff8880159a8000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 0 bytes inside of
freed 4096-byte region [ffff8880159a8000, ffff8880159a9000)
The buggy address belongs to the physical page:
page:0000000091b1d663 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880159ae000 pfn:0x159a8
head:0000000091b1d663 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 ffff888008440a08 ffffea000060f610
raw: ffff8880159ae000 0000000000040003 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880159a7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8880159a7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880159a8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880159a8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880159a8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
general protection fault, probably for non-canonical address 0xe0d79c41a0000022: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x06bd020d00000110-0x06bd020d00000117]
CPU: 0 PID: 274 Comm: syz-executor.4 Tainted: G B 6.3.0-rc1-next-20230308 #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:ffff88803fcefb08 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 06bd020d00000112 RCX: ffffffff83da5793
RDX: 00d7a041a0000022 RSI: 0000000000000008 RDI: ffff88800e73f308
RBP: ffff8880159a8000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800e73f300
R13: ffff8880159a8240 R14: dffffc0000000000 R15: ffff8880159e8000
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcf2b0df718 CR3: 0000000015888000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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+0xad8/0x2800
do_group_exit+0xd4/0x2a0
__x64_sys_exit_group+0x3e/0x50
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7fafd8a8bb19
Code: Unable to access opcode bytes at 0x7fafd8a8baef.
RSP: 002b:00007ffefdf44c88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000031 RCX: 00007fafd8a8bb19
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043
RBP: 0000000000000000 R08: 0000000000000014 R09: 0000000000000031
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fafd8ae60c3
R13: 0000000000000000 R14: 0000000000000006 R15: 00007ffefdf44e70
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:ffff88803fcefb08 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 06bd020d00000112 RCX: ffffffff83da5793
RDX: 00d7a041a0000022 RSI: 0000000000000008 RDI: ffff88800e73f308
RBP: ffff8880159a8000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800e73f300
R13: ffff8880159a8240 R14: dffffc0000000000 R15: ffff8880159e8000
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcf2b0df718 CR3: 0000000015888000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Fixing recursive fault but reboot is needed!
BUG: scheduling while atomic: syz-executor.4/274/0x00000000
INFO: lockdep is turned off.
Modules linked in:
CPU: 0 PID: 274 Comm: syz-executor.4 Tainted: G B D 6.3.0-rc1-next-20230308 #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+0x1d25/0x2a70
do_task_dead+0xd5/0x100
make_task_dead+0x36e/0x3b0
rewind_stack_and_make_dead+0x17/0x20
RIP: 0033:0x7fafd8a8bb19
Code: Unable to access opcode bytes at 0x7fafd8a8baef.
RSP: 002b:00007ffefdf44c88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000031 RCX: 00007fafd8a8bb19
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043
RBP: 0000000000000000 R08: 0000000000000014 R09: 0000000000000031
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fafd8ae60c3
R13: 0000000000000000 R14: 0000000000000006 R15: 00007ffefdf44e70
syz-executor.7: attempt to access beyond end of device
loop7: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop7, logical block 10, lost async page write
----------------
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