======================================================
WARNING: possible circular locking dependency detected
5.15.163-syzkaller #0 Not tainted
------------------------------------------------------
kworker/u5:4/3517 is trying to acquire lock:
ffff888061afc120 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1676 [inline]
ffff888061afc120 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_conn_ready net/bluetooth/sco.c:1129 [inline]
ffff888061afc120 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_connect_cfm+0x456/0xad0 net/bluetooth/sco.c:1201
but task is already holding lock:
ffff888078c52220 (&conn->lock#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:363 [inline]
ffff888078c52220 (&conn->lock#2){+.+.}-{2:2}, at: sco_conn_ready net/bluetooth/sco.c:1116 [inline]
ffff888078c52220 (&conn->lock#2){+.+.}-{2:2}, at: sco_connect_cfm+0x27c/0xad0 net/bluetooth/sco.c:1201
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&conn->lock#2){+.+.}-{2:2}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:363 [inline]
sco_chan_add net/bluetooth/sco.c:231 [inline]
sco_connect net/bluetooth/sco.c:272 [inline]
sco_sock_connect+0x32a/0x8e0 net/bluetooth/sco.c:596
__sys_connect_file net/socket.c:1918 [inline]
__sys_connect+0x38b/0x410 net/socket.c:1935
__do_sys_connect net/socket.c:1945 [inline]
__se_sys_connect net/socket.c:1942 [inline]
__x64_sys_connect+0x76/0x80 net/socket.c:1942
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> #1 (&hdev->lock){+.+.}-{3:3}:
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
sco_sock_connect+0x181/0x8e0 net/bluetooth/sco.c:591
__sys_connect_file net/socket.c:1918 [inline]
__sys_connect+0x38b/0x410 net/socket.c:1935
__do_sys_connect net/socket.c:1945 [inline]
__se_sys_connect net/socket.c:1942 [inline]
__x64_sys_connect+0x76/0x80 net/socket.c:1942
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
-> #0 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
lock_sock_nested+0x44/0x100 net/core/sock.c:3250
lock_sock include/net/sock.h:1676 [inline]
sco_conn_ready net/bluetooth/sco.c:1129 [inline]
sco_connect_cfm+0x456/0xad0 net/bluetooth/sco.c:1201
hci_connect_cfm include/net/bluetooth/hci_core.h:1510 [inline]
hci_sync_conn_complete_evt+0x4ce/0x9b0 net/bluetooth/hci_event.c:4551
hci_event_packet+0xa12/0x1550 net/bluetooth/hci_event.c:6483
hci_rx_work+0x232/0x990 net/bluetooth/hci_core.c:5156
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
other info that might help us debug this:
Chain exists of:
sk_lock-AF_BLUETOOTH-BTPROTO_SCO --> &hdev->lock --> &conn->lock#2
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&conn->lock#2);
lock(&hdev->lock);
lock(&conn->lock#2);
lock(sk_lock-AF_BLUETOOTH-BTPROTO_SCO);
*** DEADLOCK ***
5 locks held by kworker/u5:4/3517:
#0: ffff8881478e6138 ((wq_completion)hci3#2){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90002ef7d20 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffff8880762b4078 (&hdev->lock){+.+.}-{3:3}, at: hci_sync_conn_complete_evt+0xab/0x9b0 net/bluetooth/hci_event.c:4471
#3: ffffffff8db318e8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1507 [inline]
#3: ffffffff8db318e8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_sync_conn_complete_evt+0x45f/0x9b0 net/bluetooth/hci_event.c:4551
#4: ffff888078c52220 (&conn->lock#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:363 [inline]
#4: ffff888078c52220 (&conn->lock#2){+.+.}-{2:2}, at: sco_conn_ready net/bluetooth/sco.c:1116 [inline]
#4: ffff888078c52220 (&conn->lock#2){+.+.}-{2:2}, at: sco_connect_cfm+0x27c/0xad0 net/bluetooth/sco.c:1201
stack backtrace:
CPU: 0 PID: 3517 Comm: kworker/u5:4 Not tainted 5.15.163-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: hci3 hci_rx_work
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
lock_sock_nested+0x44/0x100 net/core/sock.c:3250
lock_sock include/net/sock.h:1676 [inline]
sco_conn_ready net/bluetooth/sco.c:1129 [inline]
sco_connect_cfm+0x456/0xad0 net/bluetooth/sco.c:1201
hci_connect_cfm include/net/bluetooth/hci_core.h:1510 [inline]
hci_sync_conn_complete_evt+0x4ce/0x9b0 net/bluetooth/hci_event.c:4551
hci_event_packet+0xa12/0x1550 net/bluetooth/hci_event.c:6483
hci_rx_work+0x232/0x990 net/bluetooth/hci_core.c:5156
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
BUG: sleeping function called from invalid context at net/core/sock.c:3252
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 3517, name: kworker/u5:4
INFO: lockdep is turned off.
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 PID: 3517 Comm: kworker/u5:4 Not tainted 5.15.163-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: hci3 hci_rx_work
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
___might_sleep+0x547/0x6a0 kernel/sched/core.c:9626
lock_sock_nested+0x5b/0x100 net/core/sock.c:3252
lock_sock include/net/sock.h:1676 [inline]
sco_conn_ready net/bluetooth/sco.c:1129 [inline]
sco_connect_cfm+0x456/0xad0 net/bluetooth/sco.c:1201
hci_connect_cfm include/net/bluetooth/hci_core.h:1510 [inline]
hci_sync_conn_complete_evt+0x4ce/0x9b0 net/bluetooth/hci_event.c:4551
hci_event_packet+0xa12/0x1550 net/bluetooth/hci_event.c:6483
hci_rx_work+0x232/0x990 net/bluetooth/hci_core.c:5156
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
==================================================================
BUG: KASAN: use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
BUG: KASAN: use-after-free in do_raw_spin_lock+0x290/0x370 kernel/locking/spinlock_debug.c:114
Read of size 4 at addr ffff888061afc08c by task kworker/u5:4/3517
CPU: 0 PID: 3517 Comm: kworker/u5:4 Tainted: G W 5.15.163-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: hci3 hci_rx_work
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
do_raw_spin_lock+0x290/0x370 kernel/locking/spinlock_debug.c:114
spin_lock_bh include/linux/spinlock.h:368 [inline]
lock_sock_nested+0x68/0x100 net/core/sock.c:3253
lock_sock include/net/sock.h:1676 [inline]
sco_conn_ready net/bluetooth/sco.c:1129 [inline]
sco_connect_cfm+0x456/0xad0 net/bluetooth/sco.c:1201
hci_connect_cfm include/net/bluetooth/hci_core.h:1510 [inline]
hci_sync_conn_complete_evt+0x4ce/0x9b0 net/bluetooth/hci_event.c:4551
hci_event_packet+0xa12/0x1550 net/bluetooth/hci_event.c:6483
hci_rx_work+0x232/0x990 net/bluetooth/hci_core.c:5156
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Allocated by task 4053:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
kasan_kmalloc include/linux/kasan.h:264 [inline]
__kmalloc+0x168/0x300 mm/slub.c:4407
kmalloc include/linux/slab.h:596 [inline]
sk_prot_alloc+0xe0/0x200 net/core/sock.c:1863
sk_alloc+0x35/0x310 net/core/sock.c:1916
sco_sock_alloc net/bluetooth/sco.c:485 [inline]
sco_sock_create+0xb7/0x300 net/bluetooth/sco.c:520
bt_sock_create+0x159/0x220 net/bluetooth/af_bluetooth.c:130
__sock_create+0x460/0x8d0 net/socket.c:1486
sock_create net/socket.c:1537 [inline]
__sys_socket+0x132/0x370 net/socket.c:1579
__do_sys_socket net/socket.c:1588 [inline]
__se_sys_socket net/socket.c:1586 [inline]
__x64_sys_socket+0x76/0x80 net/socket.c:1586
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Freed by task 4047:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0xf1/0x270 mm/slub.c:4559
sk_prot_free net/core/sock.c:1899 [inline]
__sk_destruct+0x58e/0x840 net/core/sock.c:1985
sco_sock_release+0x259/0x310 net/bluetooth/sco.c:1098
__sock_release net/socket.c:649 [inline]
sock_close+0xcd/0x230 net/socket.c:1336
__fput+0x3fe/0x8e0 fs/file_table.c:280
task_work_run+0x129/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
Last potentially related work creation:
kasan_save_stack+0x36/0x60 mm/kasan/common.c:38
kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348
__call_rcu kernel/rcu/tree.c:3007 [inline]
call_rcu+0x1c4/0xa70 kernel/rcu/tree.c:3087
netlink_release+0x1388/0x1800 net/netlink/af_netlink.c:815
__sock_release net/socket.c:649 [inline]
sock_close+0xcd/0x230 net/socket.c:1336
__fput+0x3fe/0x8e0 fs/file_table.c:280
task_work_run+0x129/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
The buggy address belongs to the object at ffff888061afc000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 140 bytes inside of
2048-byte region [ffff888061afc000, ffff888061afc800)
The buggy address belongs to the page:
page:ffffea000186be00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x61af8
head:ffffea000186be00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0001e27c00 0000000300000003 ffff888011c42000
raw: 0000000000000000 0000000080080008 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 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3510, ts 51893992005, free_ts 10486737750
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
__alloc_pages+0x272/0x700 mm/page_alloc.c:5423
alloc_slab_page mm/slub.c:1775 [inline]
allocate_slab mm/slub.c:1912 [inline]
new_slab+0xbb/0x4b0 mm/slub.c:1975
___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
__slab_alloc mm/slub.c:3095 [inline]
slab_alloc_node mm/slub.c:3186 [inline]
__kmalloc_node_track_caller+0x1f6/0x390 mm/slub.c:4958
kmalloc_reserve net/core/skbuff.c:356 [inline]
__alloc_skb+0x12c/0x590 net/core/skbuff.c:427
skb_copy+0x127/0x820 net/core/skbuff.c:1595
mac80211_hwsim_tx_frame_no_nl+0xe37/0x1840 drivers/net/wireless/mac80211_hwsim.c:1569
mac80211_hwsim_tx+0x7f7/0xf30 drivers/net/wireless/mac80211_hwsim.c:1673
drv_tx net/mac80211/driver-ops.h:35 [inline]
ieee80211_tx_frags+0x3d8/0x890 net/mac80211/tx.c:1714
__ieee80211_tx+0x21b/0x4a0 net/mac80211/tx.c:1768
ieee80211_tx+0x32d/0x460 net/mac80211/tx.c:1948
__ieee80211_subif_start_xmit+0x10a2/0x3470 net/mac80211/tx.c:4249
ieee80211_subif_start_xmit+0xdf/0x610 net/mac80211/tx.c:4388
__netdev_start_xmit include/linux/netdevice.h:5019 [inline]
netdev_start_xmit include/linux/netdevice.h:5033 [inline]
xmit_one net/core/dev.c:3617 [inline]
dev_hard_start_xmit+0x298/0x7a0 net/core/dev.c:3633
sch_direct_xmit+0x2b2/0x5e0 net/sched/sch_generic.c:342
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0xc34/0xcf0 mm/page_alloc.c:3317
free_unref_page+0x95/0x2d0 mm/page_alloc.c:3396
free_contig_range+0x95/0xf0 mm/page_alloc.c:9342
destroy_args+0xfe/0x980 mm/debug_vm_pgtable.c:1018
debug_vm_pgtable+0x40d/0x470 mm/debug_vm_pgtable.c:1331
do_one_initcall+0x22b/0x7a0 init/main.c:1302
do_initcall_level+0x157/0x210 init/main.c:1375
do_initcalls+0x49/0x90 init/main.c:1391
kernel_init_freeable+0x425/0x5c0 init/main.c:1615
kernel_init+0x19/0x290 init/main.c:1506
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Memory state around the buggy address:
ffff888061afbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888061afc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888061afc080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888061afc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888061afc180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================