[syzbot] [bluetooth?] KASAN: slab-use-after-free Read in release_sock

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: c3200081020d Merge tag 'block-6.6-2023-10-20' of git://git..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14bf1871680000
kernel config: https://syzkaller.appspot.com/x/.config?x=e3bef7f900b4b3bd
dashboard link: https://syzkaller.appspot.com/bug?extid=7e8507f89cd879bc6a29
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9906b7e8449a/disk-c3200081.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6e1922797b1c/vmlinux-c3200081.xz
kernel image: https://storage.googleapis.com/syzbot-assets/25f7f1c023d2/bzImage-c3200081.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7e8507...@syzkaller.appspotmail.com

==================================================================
BUG: KASAN: slab-use-after-free in list_empty include/linux/list.h:373 [inline]
BUG: KASAN: slab-use-after-free in waitqueue_active include/linux/wait.h:129 [inline]
BUG: KASAN: slab-use-after-free in release_sock+0x193/0x1b0 net/core/sock.c:3529
Read of size 8 at addr ffff888047d5b120 by task kworker/u5:0/10553

CPU: 0 PID: 10553 Comm: kworker/u5:0 Not tainted 6.6.0-rc6-syzkaller-00244-gc3200081020d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: hci5 hci_cmd_sync_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xc4/0x620 mm/kasan/report.c:475
kasan_report+0xda/0x110 mm/kasan/report.c:588
list_empty include/linux/list.h:373 [inline]
waitqueue_active include/linux/wait.h:129 [inline]
release_sock+0x193/0x1b0 net/core/sock.c:3529
sco_conn_ready net/bluetooth/sco.c:1272 [inline]
sco_connect_cfm+0x1ac/0xb70 net/bluetooth/sco.c:1359
hci_connect_cfm include/net/bluetooth/hci_core.h:1935 [inline]
hci_conn_failed+0x196/0x340 net/bluetooth/hci_conn.c:1251
hci_abort_conn_sync+0x573/0xe10 net/bluetooth/hci_sync.c:5428
abort_conn_sync+0x187/0x390 net/bluetooth/hci_conn.c:2910
hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:306
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>

Allocated by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1026 [inline]
__kmalloc+0x60/0x100 mm/slab_common.c:1039
kmalloc include/linux/slab.h:603 [inline]
sk_prot_alloc+0x1a4/0x2a0 net/core/sock.c:2090
sk_alloc+0x3a/0x7f0 net/core/sock.c:2143
bt_sock_alloc+0x3b/0x3e0 net/bluetooth/af_bluetooth.c:148
sco_sock_alloc net/bluetooth/sco.c:495 [inline]
sco_sock_create+0xe3/0x3b0 net/bluetooth/sco.c:526
bt_sock_create+0x180/0x340 net/bluetooth/af_bluetooth.c:132
__sock_create+0x328/0x800 net/socket.c:1569
sock_create net/socket.c:1620 [inline]
__sys_socket_create net/socket.c:1657 [inline]
__sys_socket+0x14c/0x260 net/socket.c:1708
__do_sys_socket net/socket.c:1722 [inline]
__se_sys_socket net/socket.c:1720 [inline]
__x64_sys_socket+0x72/0xb0 net/socket.c:1720
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
__kmem_cache_free+0xb8/0x2f0 mm/slub.c:3822
sk_prot_free net/core/sock.c:2126 [inline]
__sk_destruct+0x5fc/0x770 net/core/sock.c:2218
sk_destruct+0xc2/0xf0 net/core/sock.c:2233
__sk_free+0xc4/0x3a0 net/core/sock.c:2244
sk_free+0x7c/0xa0 net/core/sock.c:2255
sock_put include/net/sock.h:1989 [inline]
sco_sock_kill net/bluetooth/sco.c:426 [inline]
sco_sock_kill+0x19d/0x1c0 net/bluetooth/sco.c:416
sco_sock_release+0x154/0x2c0 net/bluetooth/sco.c:1256
__sock_release+0xae/0x260 net/socket.c:659
sock_close+0x1c/0x20 net/socket.c:1419
__fput+0x3f7/0xa70 fs/file_table.c:384
task_work_run+0x14d/0x240 kernel/task_work.c:180
get_signal+0x106f/0x2790 kernel/signal.c:2668
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888047d5b000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 288 bytes inside of
freed 2048-byte region [ffff888047d5b000, ffff888047d5b800)

The buggy address belongs to the physical page:
page:ffffea00011f5600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x47d58
head:ffffea00011f5600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888012c42000 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000080008 00000001ffffffff 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5066, tgid 5066 (syz-executor.4), ts 104812038932, free_ts 13078979756
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536
prep_new_page mm/page_alloc.c:1543 [inline]
get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170
__alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426
alloc_pages+0x1a9/0x270 mm/mempolicy.c:2297
alloc_slab_page mm/slub.c:1870 [inline]
allocate_slab+0x251/0x380 mm/slub.c:2017
new_slab mm/slub.c:2070 [inline]
___slab_alloc+0x8c7/0x1580 mm/slub.c:3223
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
__slab_alloc_node mm/slub.c:3375 [inline]
slab_alloc_node mm/slub.c:3468 [inline]
__kmem_cache_alloc_node+0x131/0x340 mm/slub.c:3517
__do_kmalloc_node mm/slab_common.c:1025 [inline]
__kmalloc_node+0x52/0x110 mm/slab_common.c:1033
kmalloc_node include/linux/slab.h:619 [inline]
kzalloc_node include/linux/slab.h:731 [inline]
qdisc_alloc+0xb3/0xa90 net/sched/sch_generic.c:938
qdisc_create_dflt+0x73/0x3e0 net/sched/sch_generic.c:996
attach_one_default_qdisc net/sched/sch_generic.c:1159 [inline]
netdev_for_each_tx_queue include/linux/netdevice.h:2508 [inline]
attach_default_qdiscs net/sched/sch_generic.c:1177 [inline]
dev_activate+0x66c/0x1310 net/sched/sch_generic.c:1236
__dev_open+0x383/0x4d0 net/core/dev.c:1484
__dev_change_flags+0x56a/0x730 net/core/dev.c:8626
dev_change_flags+0x9a/0x170 net/core/dev.c:8698
do_setlink+0x1a2a/0x3fa0 net/core/rtnetlink.c:2880
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1136 [inline]
free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405
free_contig_range+0xb6/0x190 mm/page_alloc.c:6342
destroy_args+0x768/0x990 mm/debug_vm_pgtable.c:1028
debug_vm_pgtable+0x1d79/0x3e00 mm/debug_vm_pgtable.c:1408
do_one_initcall+0x117/0x630 init/main.c:1232
do_initcall_level init/main.c:1294 [inline]
do_initcalls init/main.c:1310 [inline]
do_basic_setup init/main.c:1329 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1547
kernel_init+0x1c/0x2a0 init/main.c:1437
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

Memory state around the buggy address:
ffff888047d5b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888047d5b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888047d5b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888047d5b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888047d5b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:99 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_unlock+0x1f7/0x230 kernel/locking/spinlock_debug.c:140
Read of size 4 at addr ffff888047d5b09c by task kworker/u5:0/10553

CPU: 0 PID: 10553 Comm: kworker/u5:0 Tainted: G B 6.6.0-rc6-syzkaller-00244-gc3200081020d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: hci5 hci_cmd_sync_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xc4/0x620 mm/kasan/report.c:475
kasan_report+0xda/0x110 mm/kasan/report.c:588
debug_spin_unlock kernel/locking/spinlock_debug.c:99 [inline]
do_raw_spin_unlock+0x1f7/0x230 kernel/locking/spinlock_debug.c:140
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:166 [inline]
_raw_spin_unlock_bh+0x1e/0x30 kernel/locking/spinlock.c:210
sco_conn_ready net/bluetooth/sco.c:1272 [inline]
sco_connect_cfm+0x1ac/0xb70 net/bluetooth/sco.c:1359
hci_connect_cfm include/net/bluetooth/hci_core.h:1935 [inline]
hci_conn_failed+0x196/0x340 net/bluetooth/hci_conn.c:1251
hci_abort_conn_sync+0x573/0xe10 net/bluetooth/hci_sync.c:5428
abort_conn_sync+0x187/0x390 net/bluetooth/hci_conn.c:2910
hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:306
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>

Allocated by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1026 [inline]
__kmalloc+0x60/0x100 mm/slab_common.c:1039
kmalloc include/linux/slab.h:603 [inline]
sk_prot_alloc+0x1a4/0x2a0 net/core/sock.c:2090
sk_alloc+0x3a/0x7f0 net/core/sock.c:2143
bt_sock_alloc+0x3b/0x3e0 net/bluetooth/af_bluetooth.c:148
sco_sock_alloc net/bluetooth/sco.c:495 [inline]
sco_sock_create+0xe3/0x3b0 net/bluetooth/sco.c:526
bt_sock_create+0x180/0x340 net/bluetooth/af_bluetooth.c:132
__sock_create+0x328/0x800 net/socket.c:1569
sock_create net/socket.c:1620 [inline]
__sys_socket_create net/socket.c:1657 [inline]
__sys_socket+0x14c/0x260 net/socket.c:1708
__do_sys_socket net/socket.c:1722 [inline]
__se_sys_socket net/socket.c:1720 [inline]
__x64_sys_socket+0x72/0xb0 net/socket.c:1720
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
__kmem_cache_free+0xb8/0x2f0 mm/slub.c:3822
sk_prot_free net/core/sock.c:2126 [inline]
__sk_destruct+0x5fc/0x770 net/core/sock.c:2218
sk_destruct+0xc2/0xf0 net/core/sock.c:2233
__sk_free+0xc4/0x3a0 net/core/sock.c:2244
sk_free+0x7c/0xa0 net/core/sock.c:2255
sock_put include/net/sock.h:1989 [inline]
sco_sock_kill net/bluetooth/sco.c:426 [inline]
sco_sock_kill+0x19d/0x1c0 net/bluetooth/sco.c:416
sco_sock_release+0x154/0x2c0 net/bluetooth/sco.c:1256
__sock_release+0xae/0x260 net/socket.c:659
sock_close+0x1c/0x20 net/socket.c:1419
__fput+0x3f7/0xa70 fs/file_table.c:384
task_work_run+0x14d/0x240 kernel/task_work.c:180
get_signal+0x106f/0x2790 kernel/signal.c:2668
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888047d5b000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 156 bytes inside of
freed 2048-byte region [ffff888047d5b000, ffff888047d5b800)

The buggy address belongs to the physical page:
page:ffffea00011f5600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x47d58
head:ffffea00011f5600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888012c42000 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000080008 00000001ffffffff 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5066, tgid 5066 (syz-executor.4), ts 104812038932, free_ts 13078979756
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536
prep_new_page mm/page_alloc.c:1543 [inline]
get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170
__alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426
alloc_pages+0x1a9/0x270 mm/mempolicy.c:2297
alloc_slab_page mm/slub.c:1870 [inline]
allocate_slab+0x251/0x380 mm/slub.c:2017
new_slab mm/slub.c:2070 [inline]
___slab_alloc+0x8c7/0x1580 mm/slub.c:3223
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
__slab_alloc_node mm/slub.c:3375 [inline]
slab_alloc_node mm/slub.c:3468 [inline]
__kmem_cache_alloc_node+0x131/0x340 mm/slub.c:3517
__do_kmalloc_node mm/slab_common.c:1025 [inline]
__kmalloc_node+0x52/0x110 mm/slab_common.c:1033
kmalloc_node include/linux/slab.h:619 [inline]
kzalloc_node include/linux/slab.h:731 [inline]
qdisc_alloc+0xb3/0xa90 net/sched/sch_generic.c:938
qdisc_create_dflt+0x73/0x3e0 net/sched/sch_generic.c:996
attach_one_default_qdisc net/sched/sch_generic.c:1159 [inline]
netdev_for_each_tx_queue include/linux/netdevice.h:2508 [inline]
attach_default_qdiscs net/sched/sch_generic.c:1177 [inline]
dev_activate+0x66c/0x1310 net/sched/sch_generic.c:1236
__dev_open+0x383/0x4d0 net/core/dev.c:1484
__dev_change_flags+0x56a/0x730 net/core/dev.c:8626
dev_change_flags+0x9a/0x170 net/core/dev.c:8698
do_setlink+0x1a2a/0x3fa0 net/core/rtnetlink.c:2880
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1136 [inline]
free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405
free_contig_range+0xb6/0x190 mm/page_alloc.c:6342
destroy_args+0x768/0x990 mm/debug_vm_pgtable.c:1028
debug_vm_pgtable+0x1d79/0x3e00 mm/debug_vm_pgtable.c:1408
do_one_initcall+0x117/0x630 init/main.c:1232
do_initcall_level init/main.c:1294 [inline]
do_initcalls init/main.c:1310 [inline]
do_basic_setup init/main.c:1329 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1547
kernel_init+0x1c/0x2a0 init/main.c:1437
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

Memory state around the buggy address:
ffff888047d5af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888047d5b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888047d5b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888047d5b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888047d5b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: slab-use-after-free in queued_spin_is_locked include/asm-generic/qspinlock.h:57 [inline]
BUG: KASAN: slab-use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:100 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_unlock+0x53/0x230 kernel/locking/spinlock_debug.c:140
Read of size 4 at addr ffff888047d5b098 by task kworker/u5:0/10553

CPU: 0 PID: 10553 Comm: kworker/u5:0 Tainted: G B 6.6.0-rc6-syzkaller-00244-gc3200081020d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: hci5 hci_cmd_sync_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xc4/0x620 mm/kasan/report.c:475
kasan_report+0xda/0x110 mm/kasan/report.c:588
check_region_inline mm/kasan/generic.c:181 [inline]
kasan_check_range+0xef/0x190 mm/kasan/generic.c:187
instrument_atomic_read include/linux/instrumented.h:68 [inline]
atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
queued_spin_is_locked include/asm-generic/qspinlock.h:57 [inline]
debug_spin_unlock kernel/locking/spinlock_debug.c:100 [inline]
do_raw_spin_unlock+0x53/0x230 kernel/locking/spinlock_debug.c:140
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:166 [inline]
_raw_spin_unlock_bh+0x1e/0x30 kernel/locking/spinlock.c:210
sco_conn_ready net/bluetooth/sco.c:1272 [inline]
sco_connect_cfm+0x1ac/0xb70 net/bluetooth/sco.c:1359
hci_connect_cfm include/net/bluetooth/hci_core.h:1935 [inline]
hci_conn_failed+0x196/0x340 net/bluetooth/hci_conn.c:1251
hci_abort_conn_sync+0x573/0xe10 net/bluetooth/hci_sync.c:5428
abort_conn_sync+0x187/0x390 net/bluetooth/hci_conn.c:2910
hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:306
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>

Allocated by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1026 [inline]
__kmalloc+0x60/0x100 mm/slab_common.c:1039
kmalloc include/linux/slab.h:603 [inline]
sk_prot_alloc+0x1a4/0x2a0 net/core/sock.c:2090
sk_alloc+0x3a/0x7f0 net/core/sock.c:2143
bt_sock_alloc+0x3b/0x3e0 net/bluetooth/af_bluetooth.c:148
sco_sock_alloc net/bluetooth/sco.c:495 [inline]
sco_sock_create+0xe3/0x3b0 net/bluetooth/sco.c:526
bt_sock_create+0x180/0x340 net/bluetooth/af_bluetooth.c:132
__sock_create+0x328/0x800 net/socket.c:1569
sock_create net/socket.c:1620 [inline]
__sys_socket_create net/socket.c:1657 [inline]
__sys_socket+0x14c/0x260 net/socket.c:1708
__do_sys_socket net/socket.c:1722 [inline]
__se_sys_socket net/socket.c:1720 [inline]
__x64_sys_socket+0x72/0xb0 net/socket.c:1720
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
__kmem_cache_free+0xb8/0x2f0 mm/slub.c:3822
sk_prot_free net/core/sock.c:2126 [inline]
__sk_destruct+0x5fc/0x770 net/core/sock.c:2218
sk_destruct+0xc2/0xf0 net/core/sock.c:2233
__sk_free+0xc4/0x3a0 net/core/sock.c:2244
sk_free+0x7c/0xa0 net/core/sock.c:2255
sock_put include/net/sock.h:1989 [inline]
sco_sock_kill net/bluetooth/sco.c:426 [inline]
sco_sock_kill+0x19d/0x1c0 net/bluetooth/sco.c:416
sco_sock_release+0x154/0x2c0 net/bluetooth/sco.c:1256
__sock_release+0xae/0x260 net/socket.c:659
sock_close+0x1c/0x20 net/socket.c:1419
__fput+0x3f7/0xa70 fs/file_table.c:384
task_work_run+0x14d/0x240 kernel/task_work.c:180
get_signal+0x106f/0x2790 kernel/signal.c:2668
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888047d5b000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 152 bytes inside of
freed 2048-byte region [ffff888047d5b000, ffff888047d5b800)

The buggy address belongs to the physical page:
page:ffffea00011f5600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x47d58
head:ffffea00011f5600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888012c42000 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000080008 00000001ffffffff 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5066, tgid 5066 (syz-executor.4), ts 104812038932, free_ts 13078979756
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536
prep_new_page mm/page_alloc.c:1543 [inline]
get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170
__alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426
alloc_pages+0x1a9/0x270 mm/mempolicy.c:2297
alloc_slab_page mm/slub.c:1870 [inline]
allocate_slab+0x251/0x380 mm/slub.c:2017
new_slab mm/slub.c:2070 [inline]
___slab_alloc+0x8c7/0x1580 mm/slub.c:3223
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
__slab_alloc_node mm/slub.c:3375 [inline]
slab_alloc_node mm/slub.c:3468 [inline]
__kmem_cache_alloc_node+0x131/0x340 mm/slub.c:3517
__do_kmalloc_node mm/slab_common.c:1025 [inline]
__kmalloc_node+0x52/0x110 mm/slab_common.c:1033
kmalloc_node include/linux/slab.h:619 [inline]
kzalloc_node include/linux/slab.h:731 [inline]
qdisc_alloc+0xb3/0xa90 net/sched/sch_generic.c:938
qdisc_create_dflt+0x73/0x3e0 net/sched/sch_generic.c:996
attach_one_default_qdisc net/sched/sch_generic.c:1159 [inline]
netdev_for_each_tx_queue include/linux/netdevice.h:2508 [inline]
attach_default_qdiscs net/sched/sch_generic.c:1177 [inline]
dev_activate+0x66c/0x1310 net/sched/sch_generic.c:1236
__dev_open+0x383/0x4d0 net/core/dev.c:1484
__dev_change_flags+0x56a/0x730 net/core/dev.c:8626
dev_change_flags+0x9a/0x170 net/core/dev.c:8698
do_setlink+0x1a2a/0x3fa0 net/core/rtnetlink.c:2880
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1136 [inline]
free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405
free_contig_range+0xb6/0x190 mm/page_alloc.c:6342
destroy_args+0x768/0x990 mm/debug_vm_pgtable.c:1028
debug_vm_pgtable+0x1d79/0x3e00 mm/debug_vm_pgtable.c:1408
do_one_initcall+0x117/0x630 init/main.c:1232
do_initcall_level init/main.c:1294 [inline]
do_initcalls init/main.c:1310 [inline]
do_basic_setup init/main.c:1329 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1547
kernel_init+0x1c/0x2a0 init/main.c:1437
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

Memory state around the buggy address:
ffff888047d5af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888047d5b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888047d5b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888047d5b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888047d5b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
BUG: KASAN: slab-use-after-free in raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:444 [inline]
BUG: KASAN: slab-use-after-free in atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
BUG: KASAN: slab-use-after-free in queued_spin_is_locked include/asm-generic/qspinlock.h:57 [inline]
BUG: KASAN: slab-use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:100 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_unlock+0x1ed/0x230 kernel/locking/spinlock_debug.c:140
Read of size 4 at addr ffff888047d5b098 by task kworker/u5:0/10553

CPU: 0 PID: 10553 Comm: kworker/u5:0 Tainted: G B 6.6.0-rc6-syzkaller-00244-gc3200081020d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: hci5 hci_cmd_sync_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xc4/0x620 mm/kasan/report.c:475
kasan_report+0xda/0x110 mm/kasan/report.c:588
arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:444 [inline]
atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
queued_spin_is_locked include/asm-generic/qspinlock.h:57 [inline]
debug_spin_unlock kernel/locking/spinlock_debug.c:100 [inline]
do_raw_spin_unlock+0x1ed/0x230 kernel/locking/spinlock_debug.c:140
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:166 [inline]
_raw_spin_unlock_bh+0x1e/0x30 kernel/locking/spinlock.c:210
sco_conn_ready net/bluetooth/sco.c:1272 [inline]
sco_connect_cfm+0x1ac/0xb70 net/bluetooth/sco.c:1359
hci_connect_cfm include/net/bluetooth/hci_core.h:1935 [inline]
hci_conn_failed+0x196/0x340 net/bluetooth/hci_conn.c:1251
hci_abort_conn_sync+0x573/0xe10 net/bluetooth/hci_sync.c:5428
abort_conn_sync+0x187/0x390 net/bluetooth/hci_conn.c:2910
hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:306
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>

Allocated by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1026 [inline]
__kmalloc+0x60/0x100 mm/slab_common.c:1039
kmalloc include/linux/slab.h:603 [inline]
sk_prot_alloc+0x1a4/0x2a0 net/core/sock.c:2090
sk_alloc+0x3a/0x7f0 net/core/sock.c:2143
bt_sock_alloc+0x3b/0x3e0 net/bluetooth/af_bluetooth.c:148
sco_sock_alloc net/bluetooth/sco.c:495 [inline]
sco_sock_create+0xe3/0x3b0 net/bluetooth/sco.c:526
bt_sock_create+0x180/0x340 net/bluetooth/af_bluetooth.c:132
__sock_create+0x328/0x800 net/socket.c:1569
sock_create net/socket.c:1620 [inline]
__sys_socket_create net/socket.c:1657 [inline]
__sys_socket+0x14c/0x260 net/socket.c:1708
__do_sys_socket net/socket.c:1722 [inline]
__se_sys_socket net/socket.c:1720 [inline]
__x64_sys_socket+0x72/0xb0 net/socket.c:1720
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
__kmem_cache_free+0xb8/0x2f0 mm/slub.c:3822
sk_prot_free net/core/sock.c:2126 [inline]
__sk_destruct+0x5fc/0x770 net/core/sock.c:2218
sk_destruct+0xc2/0xf0 net/core/sock.c:2233
__sk_free+0xc4/0x3a0 net/core/sock.c:2244
sk_free+0x7c/0xa0 net/core/sock.c:2255
sock_put include/net/sock.h:1989 [inline]
sco_sock_kill net/bluetooth/sco.c:426 [inline]
sco_sock_kill+0x19d/0x1c0 net/bluetooth/sco.c:416
sco_sock_release+0x154/0x2c0 net/bluetooth/sco.c:1256
__sock_release+0xae/0x260 net/socket.c:659
sock_close+0x1c/0x20 net/socket.c:1419
__fput+0x3f7/0xa70 fs/file_table.c:384
task_work_run+0x14d/0x240 kernel/task_work.c:180
get_signal+0x106f/0x2790 kernel/signal.c:2668
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888047d5b000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 152 bytes inside of
freed 2048-byte region [ffff888047d5b000, ffff888047d5b800)

The buggy address belongs to the physical page:
page:ffffea00011f5600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x47d58
head:ffffea00011f5600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888012c42000 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000080008 00000001ffffffff 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5066, tgid 5066 (syz-executor.4), ts 104812038932, free_ts 13078979756
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536
prep_new_page mm/page_alloc.c:1543 [inline]
get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170
__alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426
alloc_pages+0x1a9/0x270 mm/mempolicy.c:2297
alloc_slab_page mm/slub.c:1870 [inline]
allocate_slab+0x251/0x380 mm/slub.c:2017
new_slab mm/slub.c:2070 [inline]
___slab_alloc+0x8c7/0x1580 mm/slub.c:3223
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
__slab_alloc_node mm/slub.c:3375 [inline]
slab_alloc_node mm/slub.c:3468 [inline]
__kmem_cache_alloc_node+0x131/0x340 mm/slub.c:3517
__do_kmalloc_node mm/slab_common.c:1025 [inline]
__kmalloc_node+0x52/0x110 mm/slab_common.c:1033
kmalloc_node include/linux/slab.h:619 [inline]
kzalloc_node include/linux/slab.h:731 [inline]
qdisc_alloc+0xb3/0xa90 net/sched/sch_generic.c:938
qdisc_create_dflt+0x73/0x3e0 net/sched/sch_generic.c:996
attach_one_default_qdisc net/sched/sch_generic.c:1159 [inline]
netdev_for_each_tx_queue include/linux/netdevice.h:2508 [inline]
attach_default_qdiscs net/sched/sch_generic.c:1177 [inline]
dev_activate+0x66c/0x1310 net/sched/sch_generic.c:1236
__dev_open+0x383/0x4d0 net/core/dev.c:1484
__dev_change_flags+0x56a/0x730 net/core/dev.c:8626
dev_change_flags+0x9a/0x170 net/core/dev.c:8698
do_setlink+0x1a2a/0x3fa0 net/core/rtnetlink.c:2880
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1136 [inline]
free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405
free_contig_range+0xb6/0x190 mm/page_alloc.c:6342
destroy_args+0x768/0x990 mm/debug_vm_pgtable.c:1028
debug_vm_pgtable+0x1d79/0x3e00 mm/debug_vm_pgtable.c:1408
do_one_initcall+0x117/0x630 init/main.c:1232
do_initcall_level init/main.c:1294 [inline]
do_initcalls init/main.c:1310 [inline]
do_basic_setup init/main.c:1329 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1547
kernel_init+0x1c/0x2a0 init/main.c:1437
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

Memory state around the buggy address:
ffff888047d5af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888047d5b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888047d5b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888047d5b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888047d5b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:101 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_unlock+0x211/0x230 kernel/locking/spinlock_debug.c:140
Read of size 8 at addr ffff888047d5b0a8 by task kworker/u5:0/10553

CPU: 0 PID: 10553 Comm: kworker/u5:0 Tainted: G B 6.6.0-rc6-syzkaller-00244-gc3200081020d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: hci5 hci_cmd_sync_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xc4/0x620 mm/kasan/report.c:475
kasan_report+0xda/0x110 mm/kasan/report.c:588
debug_spin_unlock kernel/locking/spinlock_debug.c:101 [inline]
do_raw_spin_unlock+0x211/0x230 kernel/locking/spinlock_debug.c:140
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:166 [inline]
_raw_spin_unlock_bh+0x1e/0x30 kernel/locking/spinlock.c:210
sco_conn_ready net/bluetooth/sco.c:1272 [inline]
sco_connect_cfm+0x1ac/0xb70 net/bluetooth/sco.c:1359
hci_connect_cfm include/net/bluetooth/hci_core.h:1935 [inline]
hci_conn_failed+0x196/0x340 net/bluetooth/hci_conn.c:1251
hci_abort_conn_sync+0x573/0xe10 net/bluetooth/hci_sync.c:5428
abort_conn_sync+0x187/0x390 net/bluetooth/hci_conn.c:2910
hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:306
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>

Allocated by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1026 [inline]
__kmalloc+0x60/0x100 mm/slab_common.c:1039
kmalloc include/linux/slab.h:603 [inline]
sk_prot_alloc+0x1a4/0x2a0 net/core/sock.c:2090
sk_alloc+0x3a/0x7f0 net/core/sock.c:2143
bt_sock_alloc+0x3b/0x3e0 net/bluetooth/af_bluetooth.c:148
sco_sock_alloc net/bluetooth/sco.c:495 [inline]
sco_sock_create+0xe3/0x3b0 net/bluetooth/sco.c:526
bt_sock_create+0x180/0x340 net/bluetooth/af_bluetooth.c:132
__sock_create+0x328/0x800 net/socket.c:1569
sock_create net/socket.c:1620 [inline]
__sys_socket_create net/socket.c:1657 [inline]
__sys_socket+0x14c/0x260 net/socket.c:1708
__do_sys_socket net/socket.c:1722 [inline]
__se_sys_socket net/socket.c:1720 [inline]
__x64_sys_socket+0x72/0xb0 net/socket.c:1720
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
__kmem_cache_free+0xb8/0x2f0 mm/slub.c:3822
sk_prot_free net/core/sock.c:2126 [inline]
__sk_destruct+0x5fc/0x770 net/core/sock.c:2218
sk_destruct+0xc2/0xf0 net/core/sock.c:2233
__sk_free+0xc4/0x3a0 net/core/sock.c:2244
sk_free+0x7c/0xa0 net/core/sock.c:2255
sock_put include/net/sock.h:1989 [inline]
sco_sock_kill net/bluetooth/sco.c:426 [inline]
sco_sock_kill+0x19d/0x1c0 net/bluetooth/sco.c:416
sco_sock_release+0x154/0x2c0 net/bluetooth/sco.c:1256
__sock_release+0xae/0x260 net/socket.c:659
sock_close+0x1c/0x20 net/socket.c:1419
__fput+0x3f7/0xa70 fs/file_table.c:384
task_work_run+0x14d/0x240 kernel/task_work.c:180
get_signal+0x106f/0x2790 kernel/signal.c:2668
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888047d5b000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 168 bytes inside of
freed 2048-byte region [ffff888047d5b000, ffff888047d5b800)

The buggy address belongs to the physical page:
page:ffffea00011f5600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x47d58
head:ffffea00011f5600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888012c42000 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000080008 00000001ffffffff 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5066, tgid 5066 (syz-executor.4), ts 104812038932, free_ts 13078979756
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536
prep_new_page mm/page_alloc.c:1543 [inline]
get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170
__alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426
alloc_pages+0x1a9/0x270 mm/mempolicy.c:2297
alloc_slab_page mm/slub.c:1870 [inline]
allocate_slab+0x251/0x380 mm/slub.c:2017
new_slab mm/slub.c:2070 [inline]
___slab_alloc+0x8c7/0x1580 mm/slub.c:3223
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
__slab_alloc_node mm/slub.c:3375 [inline]
slab_alloc_node mm/slub.c:3468 [inline]
__kmem_cache_alloc_node+0x131/0x340 mm/slub.c:3517
__do_kmalloc_node mm/slab_common.c:1025 [inline]
__kmalloc_node+0x52/0x110 mm/slab_common.c:1033
kmalloc_node include/linux/slab.h:619 [inline]
kzalloc_node include/linux/slab.h:731 [inline]
qdisc_alloc+0xb3/0xa90 net/sched/sch_generic.c:938
qdisc_create_dflt+0x73/0x3e0 net/sched/sch_generic.c:996
attach_one_default_qdisc net/sched/sch_generic.c:1159 [inline]
netdev_for_each_tx_queue include/linux/netdevice.h:2508 [inline]
attach_default_qdiscs net/sched/sch_generic.c:1177 [inline]
dev_activate+0x66c/0x1310 net/sched/sch_generic.c:1236
__dev_open+0x383/0x4d0 net/core/dev.c:1484
__dev_change_flags+0x56a/0x730 net/core/dev.c:8626
dev_change_flags+0x9a/0x170 net/core/dev.c:8698
do_setlink+0x1a2a/0x3fa0 net/core/rtnetlink.c:2880
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1136 [inline]
free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405
free_contig_range+0xb6/0x190 mm/page_alloc.c:6342
destroy_args+0x768/0x990 mm/debug_vm_pgtable.c:1028
debug_vm_pgtable+0x1d79/0x3e00 mm/debug_vm_pgtable.c:1408
do_one_initcall+0x117/0x630 init/main.c:1232
do_initcall_level init/main.c:1294 [inline]
do_initcalls init/main.c:1310 [inline]
do_basic_setup init/main.c:1329 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1547
kernel_init+0x1c/0x2a0 init/main.c:1437
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

Memory state around the buggy address:
ffff888047d5af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888047d5b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888047d5b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888047d5b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888047d5b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:102 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_unlock+0x1e0/0x230 kernel/locking/spinlock_debug.c:140
Read of size 4 at addr ffff888047d5b0a0 by task kworker/u5:0/10553

CPU: 0 PID: 10553 Comm: kworker/u5:0 Tainted: G B 6.6.0-rc6-syzkaller-00244-gc3200081020d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: hci5 hci_cmd_sync_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xc4/0x620 mm/kasan/report.c:475
kasan_report+0xda/0x110 mm/kasan/report.c:588
debug_spin_unlock kernel/locking/spinlock_debug.c:102 [inline]
do_raw_spin_unlock+0x1e0/0x230 kernel/locking/spinlock_debug.c:140
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:166 [inline]
_raw_spin_unlock_bh+0x1e/0x30 kernel/locking/spinlock.c:210
sco_conn_ready net/bluetooth/sco.c:1272 [inline]
sco_connect_cfm+0x1ac/0xb70 net/bluetooth/sco.c:1359
hci_connect_cfm include/net/bluetooth/hci_core.h:1935 [inline]
hci_conn_failed+0x196/0x340 net/bluetooth/hci_conn.c:1251
hci_abort_conn_sync+0x573/0xe10 net/bluetooth/hci_sync.c:5428
abort_conn_sync+0x187/0x390 net/bluetooth/hci_conn.c:2910
hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:306
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>

Allocated by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1026 [inline]
__kmalloc+0x60/0x100 mm/slab_common.c:1039
kmalloc include/linux/slab.h:603 [inline]
sk_prot_alloc+0x1a4/0x2a0 net/core/sock.c:2090
sk_alloc+0x3a/0x7f0 net/core/sock.c:2143
bt_sock_alloc+0x3b/0x3e0 net/bluetooth/af_bluetooth.c:148
sco_sock_alloc net/bluetooth/sco.c:495 [inline]
sco_sock_create+0xe3/0x3b0 net/bluetooth/sco.c:526
bt_sock_create+0x180/0x340 net/bluetooth/af_bluetooth.c:132
__sock_create+0x328/0x800 net/socket.c:1569
sock_create net/socket.c:1620 [inline]
__sys_socket_create net/socket.c:1657 [inline]
__sys_socket+0x14c/0x260 net/socket.c:1708
__do_sys_socket net/socket.c:1722 [inline]
__se_sys_socket net/socket.c:1720 [inline]
__x64_sys_socket+0x72/0xb0 net/socket.c:1720
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
__kmem_cache_free+0xb8/0x2f0 mm/slub.c:3822
sk_prot_free net/core/sock.c:2126 [inline]
__sk_destruct+0x5fc/0x770 net/core/sock.c:2218
sk_destruct+0xc2/0xf0 net/core/sock.c:2233
__sk_free+0xc4/0x3a0 net/core/sock.c:2244
sk_free+0x7c/0xa0 net/core/sock.c:2255
sock_put include/net/sock.h:1989 [inline]
sco_sock_kill net/bluetooth/sco.c:426 [inline]
sco_sock_kill+0x19d/0x1c0 net/bluetooth/sco.c:416
sco_sock_release+0x154/0x2c0 net/bluetooth/sco.c:1256
__sock_release+0xae/0x260 net/socket.c:659
sock_close+0x1c/0x20 net/socket.c:1419
__fput+0x3f7/0xa70 fs/file_table.c:384
task_work_run+0x14d/0x240 kernel/task_work.c:180
get_signal+0x106f/0x2790 kernel/signal.c:2668
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888047d5b000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 160 bytes inside of
freed 2048-byte region [ffff888047d5b000, ffff888047d5b800)

The buggy address belongs to the physical page:
page:ffffea00011f5600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x47d58
head:ffffea00011f5600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888012c42000 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000080008 00000001ffffffff 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5066, tgid 5066 (syz-executor.4), ts 104812038932, free_ts 13078979756
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536
prep_new_page mm/page_alloc.c:1543 [inline]
get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170
__alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426
alloc_pages+0x1a9/0x270 mm/mempolicy.c:2297
alloc_slab_page mm/slub.c:1870 [inline]
allocate_slab+0x251/0x380 mm/slub.c:2017
new_slab mm/slub.c:2070 [inline]
___slab_alloc+0x8c7/0x1580 mm/slub.c:3223
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
__slab_alloc_node mm/slub.c:3375 [inline]
slab_alloc_node mm/slub.c:3468 [inline]
__kmem_cache_alloc_node+0x131/0x340 mm/slub.c:3517
__do_kmalloc_node mm/slab_common.c:1025 [inline]
__kmalloc_node+0x52/0x110 mm/slab_common.c:1033
kmalloc_node include/linux/slab.h:619 [inline]
kzalloc_node include/linux/slab.h:731 [inline]
qdisc_alloc+0xb3/0xa90 net/sched/sch_generic.c:938
qdisc_create_dflt+0x73/0x3e0 net/sched/sch_generic.c:996
attach_one_default_qdisc net/sched/sch_generic.c:1159 [inline]
netdev_for_each_tx_queue include/linux/netdevice.h:2508 [inline]
attach_default_qdiscs net/sched/sch_generic.c:1177 [inline]
dev_activate+0x66c/0x1310 net/sched/sch_generic.c:1236
__dev_open+0x383/0x4d0 net/core/dev.c:1484
__dev_change_flags+0x56a/0x730 net/core/dev.c:8626
dev_change_flags+0x9a/0x170 net/core/dev.c:8698
do_setlink+0x1a2a/0x3fa0 net/core/rtnetlink.c:2880
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1136 [inline]
free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405
free_contig_range+0xb6/0x190 mm/page_alloc.c:6342
destroy_args+0x768/0x990 mm/debug_vm_pgtable.c:1028
debug_vm_pgtable+0x1d79/0x3e00 mm/debug_vm_pgtable.c:1408
do_one_initcall+0x117/0x630 init/main.c:1232
do_initcall_level init/main.c:1294 [inline]
do_initcalls init/main.c:1310 [inline]
do_basic_setup init/main.c:1329 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1547
kernel_init+0x1c/0x2a0 init/main.c:1437
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

Memory state around the buggy address:
ffff888047d5af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888047d5b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888047d5b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888047d5b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888047d5b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_unlock kernel/locking/spinlock_debug.c:104 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_unlock+0x204/0x230 kernel/locking/spinlock_debug.c:140
Write of size 8 at addr ffff888047d5b0a8 by task kworker/u5:0/10553

CPU: 0 PID: 10553 Comm: kworker/u5:0 Tainted: G B 6.6.0-rc6-syzkaller-00244-gc3200081020d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: hci5 hci_cmd_sync_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xc4/0x620 mm/kasan/report.c:475
kasan_report+0xda/0x110 mm/kasan/report.c:588
debug_spin_unlock kernel/locking/spinlock_debug.c:104 [inline]
do_raw_spin_unlock+0x204/0x230 kernel/locking/spinlock_debug.c:140
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:166 [inline]
_raw_spin_unlock_bh+0x1e/0x30 kernel/locking/spinlock.c:210
sco_conn_ready net/bluetooth/sco.c:1272 [inline]
sco_connect_cfm+0x1ac/0xb70 net/bluetooth/sco.c:1359
hci_connect_cfm include/net/bluetooth/hci_core.h:1935 [inline]
hci_conn_failed+0x196/0x340 net/bluetooth/hci_conn.c:1251
hci_abort_conn_sync+0x573/0xe10 net/bluetooth/hci_sync.c:5428
abort_conn_sync+0x187/0x390 net/bluetooth/hci_conn.c:2910
hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:306
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>

Allocated by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1026 [inline]
__kmalloc+0x60/0x100 mm/slab_common.c:1039
kmalloc include/linux/slab.h:603 [inline]
sk_prot_alloc+0x1a4/0x2a0 net/core/sock.c:2090
sk_alloc+0x3a/0x7f0 net/core/sock.c:2143
bt_sock_alloc+0x3b/0x3e0 net/bluetooth/af_bluetooth.c:148
sco_sock_alloc net/bluetooth/sco.c:495 [inline]
sco_sock_create+0xe3/0x3b0 net/bluetooth/sco.c:526
bt_sock_create+0x180/0x340 net/bluetooth/af_bluetooth.c:132
__sock_create+0x328/0x800 net/socket.c:1569
sock_create net/socket.c:1620 [inline]
__sys_socket_create net/socket.c:1657 [inline]
__sys_socket+0x14c/0x260 net/socket.c:1708
__do_sys_socket net/socket.c:1722 [inline]
__se_sys_socket net/socket.c:1720 [inline]
__x64_sys_socket+0x72/0xb0 net/socket.c:1720
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 11594:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
__kmem_cache_free+0xb8/0x2f0 mm/slub.c:3822
sk_prot_free net/core/sock.c:2126 [inline]
__sk_destruct+0x5fc/0x770 net/core/sock.c:2218
sk_destruct+0xc2/0xf0 net/core/sock.c:2233
__sk_free+0xc4/0x3a0 net/core/sock.c:2244
sk_free+0x7c/0xa0 net/core/sock.c:2255
sock_put include/net/sock.h:1989 [inline]
sco_sock_kill net/bluetooth/sco.c:426 [inline]
sco_sock_kill+0x19d/0x1c0 net/bluetooth/sco.c:416
sco_sock_release+0x154/0x2c0 net/bluetooth/sco.c:1256
__sock_release+0xae/0x260 net/socket.c:659
sock_close+0x1c/0x20 net/socket.c:1419
__fput+0x3f7/0xa70 fs/file_table.c:384
task_work_run+0x14d/0x240 kernel/task_work.c:180
get_signal+0x106f/0x2790 kernel/signal.c:2668
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888047d5b000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 168 bytes inside of
freed 2048-byte region [ffff888047d5b000, ffff888047d5b800)

The buggy address belongs to the physical page:
page:ffffea00011f5600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x47d58
head:ffffea00011f5600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888012c42000 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000080008 00000001ffffffff 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5066, tgid 5066 (syz-executor.4), ts 104812038932, free_ts 13078979756
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536
prep_new_page mm/page_alloc.c:1543 [inline]
get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170
__alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426
alloc_pages+0x1a9/0x270 mm/mempolicy.c:2297
alloc_slab_page mm/slub.c:1870 [inline]
allocate_slab+0x251/0x380 mm/slub.c:2017
new_slab mm/slub.c:2070 [inline]
___slab_alloc+0x8c7/0x1580 mm/slub.c:3223
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
__slab_alloc_node mm/slub.c:3375 [inline]
slab_alloc_node mm/slub.c:3468 [inline]
__kmem_cache_alloc_node+0x131/0x340 mm/slub.c:3517
__do_kmalloc_node mm/slab_common.c:1025 [inline]
__kmalloc_node+0x52/0x110 mm/slab_common.c:1033
kmalloc_node include/linux/slab.h:619 [inline]
kzalloc_node include/linux/slab.h:731 [inline]
qdisc_alloc+0xb3/0xa90 net/sched/sch_generic.c:938
qdisc_create_dflt+0x73/0x3e0 net/sched/sch_generic.c:996
attach_one_default_qdisc net/sched/sch_generic.c:1159 [inline]
netdev_for_each_tx_queue include/linux/netdevice.h:2508 [inline]
attach_default_qdiscs net/sched/sch_generic.c:1177 [inline]
dev_activate+0x66c/0x1310 net/sched/sch_generic.c:1236
__dev_open+0x383/0x4d0 net/core/dev.c:1484
__dev_change_flags+0x56a/0x730 net/core/dev.c:8626
dev_change_flags+0x9a/0x170 net/core/dev.c:8698
do_setlink+0x1a2a/0x3fa0 net/core/rtnetlink.c:2880
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1136 [inline]
free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405
free_contig_range+0xb6/0x190 mm/page_alloc.c:6342
destroy_args+0x768/0x990 mm/debug_vm_pgtable.c:1028
debug_vm_pgtable+0x1d79/0x3e00 mm/debug_vm_pgtable.c:1408
do_one_initcall+0x117/0x630 init/main.c:1232
do_initcall_level init/main.c:1294 [inline]
do_initcalls init/main.c:1310 [inline]
do_basic_setup init/main.c:1329 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1547
kernel_init+0x1c/0x2a0 init/main.c:1437
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

Memory state around the buggy address:
ffff888047d5af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888047d5b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888047d5b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888047d5b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888047d5b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================


---
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Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.