Bluetooth: hci2: Opcode 0x0406 failed: -4
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: slab-use-after-free in sock_flag include/net/sock.h:992 [inline]
BUG: KASAN: slab-use-after-free in sk_wake_async_rcu include/net/sock.h:2470 [inline]
BUG: KASAN: slab-use-after-free in sock_def_readable+0x175/0x610 net/core/sock.c:3458
Read of size 8 at addr ffff8880750a2060 by task syz.8.2237/20732
CPU: 0 UID: 0 PID: 20732 Comm: syz.8.2237 Not tainted 6.13.0-syzkaller-00918-g95ec54a420b8 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:489
kasan_report+0xd9/0x110 mm/kasan/report.c:602
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
sock_flag include/net/sock.h:992 [inline]
sk_wake_async_rcu include/net/sock.h:2470 [inline]
sock_def_readable+0x175/0x610 net/core/sock.c:3458
l2cap_sock_teardown_cb+0x1d1/0x3c0 net/bluetooth/l2cap_sock.c:1602
l2cap_chan_del+0xba/0x8f0 net/bluetooth/l2cap_core.c:658
l2cap_conn_del+0x37c/0x730 net/bluetooth/l2cap_core.c:1785
l2cap_connect_cfm+0x7aa/0xf10 net/bluetooth/l2cap_core.c:7235
hci_connect_cfm include/net/bluetooth/hci_core.h:2057 [inline]
hci_conn_failed+0x225/0x3e0 net/bluetooth/hci_conn.c:1266
hci_abort_conn_sync+0x968/0x1030 net/bluetooth/hci_sync.c:5604
hci_disconnect_all_sync.constprop.0+0x104/0x3c0 net/bluetooth/hci_sync.c:5627
hci_suspend_sync+0x772/0xab0 net/bluetooth/hci_sync.c:6104
hci_suspend_dev+0x27d/0x5e0 net/bluetooth/hci_core.c:2831
hci_suspend_notifier+0x28d/0x2f0 net/bluetooth/hci_core.c:2411
notifier_call_chain+0xb7/0x410 kernel/notifier.c:85
notifier_call_chain_robust kernel/notifier.c:120 [inline]
blocking_notifier_call_chain_robust kernel/notifier.c:345 [inline]
blocking_notifier_call_chain_robust+0xc9/0x170 kernel/notifier.c:333
pm_notifier_call_chain_robust+0x27/0x60 kernel/power/main.c:102
snapshot_open+0x189/0x2b0 kernel/power/user.c:77
misc_open+0x35a/0x420 drivers/char/misc.c:165
chrdev_open+0x237/0x6a0 fs/char_dev.c:414
do_dentry_open+0xf59/0x1ea0 fs/open.c:938
vfs_open+0x82/0x3f0 fs/open.c:1068
do_open fs/namei.c:3828 [inline]
path_openat+0x1e81/0x2d70 fs/namei.c:3987
do_filp_open+0x20c/0x470 fs/namei.c:4014
do_sys_openat2+0x17a/0x1e0 fs/open.c:1395
do_sys_open fs/open.c:1410 [inline]
__do_compat_sys_openat fs/open.c:1472 [inline]
__se_compat_sys_openat fs/open.c:1470 [inline]
__ia32_compat_sys_openat+0x16e/0x210 fs/open.c:1470
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf706e579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f506055c EFLAGS: 00000296 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000200004c0
RDX: 0000000000000800 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Allocated by task 20737:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4298 [inline]
__kmalloc_noprof+0x21a/0x4f0 mm/slub.c:4310
kmalloc_noprof include/linux/slab.h:905 [inline]
sk_prot_alloc+0x1a8/0x2a0 net/core/sock.c:2168
sk_alloc+0x36/0xb90 net/core/sock.c:2221
bt_sock_alloc+0x3b/0x3a0 net/bluetooth/af_bluetooth.c:148
l2cap_sock_alloc.constprop.0+0x33/0x1c0 net/bluetooth/l2cap_sock.c:1879
l2cap_sock_create+0x123/0x1f0 net/bluetooth/l2cap_sock.c:1920
bt_sock_create+0x182/0x350 net/bluetooth/af_bluetooth.c:132
__sock_create+0x335/0x8d0 net/socket.c:1558
sock_create net/socket.c:1616 [inline]
__sys_socket_create net/socket.c:1653 [inline]
__sys_socket+0x14f/0x260 net/socket.c:1700
__do_sys_socket net/socket.c:1714 [inline]
__se_sys_socket net/socket.c:1712 [inline]
__ia32_sys_socket+0x72/0xb0 net/socket.c:1712
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Freed by task 20737:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:582
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4613 [inline]
kfree+0x14f/0x4b0 mm/slub.c:4761
sk_prot_free net/core/sock.c:2204 [inline]
__sk_destruct+0x5eb/0x720 net/core/sock.c:2296
sk_destruct+0xc2/0xf0 net/core/sock.c:2311
__sk_free+0xf4/0x3e0 net/core/sock.c:2322
sk_free+0x6a/0x90 net/core/sock.c:2333
sock_put include/net/sock.h:1910 [inline]
l2cap_sock_kill net/bluetooth/l2cap_sock.c:1252 [inline]
l2cap_sock_kill+0x171/0x2d0 net/bluetooth/l2cap_sock.c:1237
l2cap_sock_release+0x189/0x210 net/bluetooth/l2cap_sock.c:1423
__sock_release+0xb0/0x270 net/socket.c:640
sock_close+0x1c/0x30 net/socket.c:1408
__fput+0x3f8/0xb60 fs/file_table.c:450
task_work_run+0x14e/0x250 kernel/task_work.c:239
get_signal+0x1d3/0x2610 kernel/signal.c:2809
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
__do_fast_syscall_32+0x80/0x120 arch/x86/entry/common.c:389
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
The buggy address belongs to the object at ffff8880750a2000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 96 bytes inside of
freed 2048-byte region [ffff8880750a2000, ffff8880750a2800)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880750a6000 pfn:0x750a0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000040 ffff88801b042f00 ffffea00017b9400 dead000000000002
raw: ffff8880750a6000 0000000000080007 00000001f5000000 0000000000000000
head: 04fff00000000040 ffff88801b042f00 ffffea00017b9400 dead000000000002
head: ffff8880750a6000 0000000000080007 00000001f5000000 0000000000000000
head: 04fff00000000003 ffffea0001d42801 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 11242, tgid 11242 (syz-executor), ts 209858358142, free_ts 209856543599
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558
prep_new_page mm/page_alloc.c:1566 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476
__alloc_pages_noprof+0x221/0x2470 mm/page_alloc.c:4753
alloc_pages_mpol_noprof+0x2c8/0x620 mm/mempolicy.c:2269
alloc_slab_page mm/slub.c:2423 [inline]
allocate_slab mm/slub.c:2589 [inline]
new_slab+0x2c9/0x410 mm/slub.c:2642
___slab_alloc+0xcda/0x1660 mm/slub.c:3830
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920
__slab_alloc_node mm/slub.c:3995 [inline]
slab_alloc_node mm/slub.c:4156 [inline]
__do_kmalloc_node mm/slub.c:4297 [inline]
__kmalloc_node_track_caller_noprof+0x2ee/0x520 mm/slub.c:4317
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:609
__alloc_skb+0x164/0x380 net/core/skbuff.c:678
alloc_skb include/linux/skbuff.h:1323 [inline]
nlmsg_new include/net/netlink.h:1018 [inline]
inet6_ifinfo_notify+0x77/0x150 net/ipv6/addrconf.c:6178
addrconf_notify+0x81a/0x19c0 net/ipv6/addrconf.c:3784
notifier_call_chain+0xb7/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2026
call_netdevice_notifiers_extack net/core/dev.c:2064 [inline]
call_netdevice_notifiers net/core/dev.c:2078 [inline]
__dev_notify_flags+0x12d/0x2e0 net/core/dev.c:9007
dev_change_flags+0x10c/0x160 net/core/dev.c:9045
page last free pid 11242 tgid 11242 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0x661/0x1080 mm/page_alloc.c:2659
__put_partials+0x14c/0x170 mm/slub.c:3157
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4119 [inline]
slab_alloc_node mm/slub.c:4168 [inline]
__do_kmalloc_node mm/slub.c:4297 [inline]
__kmalloc_node_noprof+0x1d0/0x520 mm/slub.c:4304
kmalloc_array_node_noprof include/linux/slab.h:1018 [inline]
alloc_slab_obj_exts+0x41/0xa0 mm/slub.c:1964
account_slab mm/slub.c:2552 [inline]
allocate_slab mm/slub.c:2607 [inline]
new_slab+0x314/0x410 mm/slub.c:2642
___slab_alloc+0xcda/0x1660 mm/slub.c:3830
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920
__slab_alloc_node mm/slub.c:3995 [inline]
slab_alloc_node mm/slub.c:4156 [inline]
kmem_cache_alloc_noprof+0xeb/0x3b0 mm/slub.c:4175
sk_prot_alloc+0x60/0x2a0 net/core/sock.c:2162
sk_alloc+0x36/0xb90 net/core/sock.c:2221
unix_create1+0xa6/0x6c0 net/unix/af_unix.c:1024
unix_create+0x10e/0x1d0 net/unix/af_unix.c:1094
__sock_create+0x335/0x8d0 net/socket.c:1558
Memory state around the buggy address:
ffff8880750a1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880750a1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880750a2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880750a2080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880750a2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi