=========================
WARNING: held lock freed!
syzkaller #0 Not tainted
-------------------------
syz.4.921/9161 is freeing memory ffff88803c45f000-ffff88803c45f7ff, with a lock still held there!
ffff88803c45f258 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1679 [inline]
ffff88803c45f258 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+.}-{0:0}, at: bt_accept_dequeue+0x249/0x670 net/bluetooth/af_bluetooth.c:279
3 locks held by syz.4.921/9161:
#0: ffff88801fb46f48 (&sb->s_type->i_mutex_key#11){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline]
#0: ffff88801fb46f48 (&sb->s_type->i_mutex_key#11){+.+.}-{4:4}, at: __sock_release+0x86/0x270 net/socket.c:661
#1: ffff88804ab91258 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP/2){+.+.}-{0:0}, at: l2cap_sock_release+0x61/0x250 net/bluetooth/l2cap_sock.c:1425
#2: ffff88803c45f258 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1679 [inline]
#2: ffff88803c45f258 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+.}-{0:0}, at: bt_accept_dequeue+0x249/0x670 net/bluetooth/af_bluetooth.c:279
stack backtrace:
CPU: 1 UID: 0 PID: 9161 Comm: syz.4.921 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_freed_lock_bug kernel/locking/lockdep.c:6693 [inline]
debug_check_no_locks_freed+0x134/0x170 kernel/locking/lockdep.c:6728
slab_free_hook mm/slub.c:2443 [inline]
slab_free mm/slub.c:6574 [inline]
kfree+0xe0/0x6d0 mm/slub.c:6781
sk_prot_free net/core/sock.c:2278 [inline]
__sk_destruct+0x75f/0x9a0 net/core/sock.c:2373
sk_destruct+0xc2/0xf0 net/core/sock.c:2401
__sk_free+0xf4/0x3e0 net/core/sock.c:2412
sk_free+0x6a/0x90 net/core/sock.c:2423
sock_put include/net/sock.h:1972 [inline]
bt_accept_unlink+0x23c/0x2d0 net/bluetooth/af_bluetooth.c:262
bt_accept_dequeue+0x569/0x670 net/bluetooth/af_bluetooth.c:308
l2cap_sock_cleanup_listen+0x5c/0x2a0 net/bluetooth/l2cap_sock.c:1454
l2cap_sock_release+0x69/0x250 net/bluetooth/l2cap_sock.c:1426
__sock_release+0xb3/0x270 net/socket.c:662
sock_close+0x1c/0x30 net/socket.c:1455
__fput+0x3ff/0xb70 fs/file_table.c:468
task_work_run+0x14d/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x86f/0x2bf0 kernel/exit.c:966
do_group_exit+0xd3/0x2a0 kernel/exit.c:1107
get_signal+0x2671/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7c0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x85/0x130 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2205fc1785
Code: Unable to access opcode bytes at 0x7f2205fc175b.
RSP: 002b:00007f2206e31f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f22061e5fa0 RCX: 00007f2205fc1785
RDX: 00007f2206e31fc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f2206011f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f22061e6038 R14: 00007f22061e5fa0 R15: 00007ffe71740448
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x26f/0x2b0 kernel/locking/spinlock_debug.c:115
Read of size 4 at addr ffff88803c45f1c4 by task syz.4.921/9161
CPU: 0 UID: 0 PID: 9161 Comm: syz.4.921 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
__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+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
do_raw_spin_lock+0x26f/0x2b0 kernel/locking/spinlock_debug.c:115
spin_lock_bh include/linux/spinlock.h:356 [inline]
release_sock+0x21/0x220 net/core/sock.c:3733
bt_accept_dequeue+0x557/0x670 net/bluetooth/af_bluetooth.c:312
l2cap_sock_cleanup_listen+0x5c/0x2a0 net/bluetooth/l2cap_sock.c:1454
l2cap_sock_release+0x69/0x250 net/bluetooth/l2cap_sock.c:1426
__sock_release+0xb3/0x270 net/socket.c:662
sock_close+0x1c/0x30 net/socket.c:1455
__fput+0x3ff/0xb70 fs/file_table.c:468
task_work_run+0x14d/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x86f/0x2bf0 kernel/exit.c:966
do_group_exit+0xd3/0x2a0 kernel/exit.c:1107
get_signal+0x2671/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7c0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x85/0x130 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2205fc1785
Code: Unable to access opcode bytes at 0x7f2205fc175b.
RSP: 002b:00007f2206e31f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f22061e5fa0 RCX: 00007f2205fc1785
RDX: 00007f2206e31fc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f2206011f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f22061e6038 R14: 00007f22061e5fa0 R15: 00007ffe71740448
Allocated by task 64:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
poison_kmalloc_redzone mm/kasan/common.c:400 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:417
kasan_kmalloc include/linux/kasan.h:262 [inline]
__do_kmalloc_node mm/slub.c:5604 [inline]
__kmalloc_noprof+0x32f/0x880 mm/slub.c:5616
kmalloc_noprof include/linux/slab.h:961 [inline]
sk_prot_alloc+0x1a8/0x2a0 net/core/sock.c:2239
sk_alloc+0x36/0xc20 net/core/sock.c:2295
bt_sock_alloc+0x3b/0x3a0 net/bluetooth/af_bluetooth.c:151
l2cap_sock_alloc.constprop.0+0x33/0x1d0 net/bluetooth/l2cap_sock.c:1897
l2cap_sock_new_connection_cb+0x101/0x240 net/bluetooth/l2cap_sock.c:1485
l2cap_connect_cfm+0x4c4/0xf80 net/bluetooth/l2cap_core.c:7287
hci_connect_cfm include/net/bluetooth/hci_core.h:2106 [inline]
hci_remote_features_evt+0x4e0/0x970 net/bluetooth/hci_event.c:3728
hci_event_func net/bluetooth/hci_event.c:7559 [inline]
hci_event_packet+0xa0d/0x11c0 net/bluetooth/hci_event.c:7613
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4099
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
kthread+0x3c2/0x780 kernel/kthread.c:463
ret_from_fork+0x672/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Freed by task 9161:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
__kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2515 [inline]
slab_free mm/slub.c:6574 [inline]
kfree+0x2b8/0x6d0 mm/slub.c:6781
sk_prot_free net/core/sock.c:2278 [inline]
__sk_destruct+0x75f/0x9a0 net/core/sock.c:2373
sk_destruct+0xc2/0xf0 net/core/sock.c:2401
__sk_free+0xf4/0x3e0 net/core/sock.c:2412
sk_free+0x6a/0x90 net/core/sock.c:2423
sock_put include/net/sock.h:1972 [inline]
bt_accept_unlink+0x23c/0x2d0 net/bluetooth/af_bluetooth.c:262
bt_accept_dequeue+0x569/0x670 net/bluetooth/af_bluetooth.c:308
l2cap_sock_cleanup_listen+0x5c/0x2a0 net/bluetooth/l2cap_sock.c:1454
l2cap_sock_release+0x69/0x250 net/bluetooth/l2cap_sock.c:1426
__sock_release+0xb3/0x270 net/socket.c:662
sock_close+0x1c/0x30 net/socket.c:1455
__fput+0x3ff/0xb70 fs/file_table.c:468
task_work_run+0x14d/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x86f/0x2bf0 kernel/exit.c:966
do_group_exit+0xd3/0x2a0 kernel/exit.c:1107
get_signal+0x2671/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7c0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x85/0x130 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88803c45f000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 452 bytes inside of
freed 2048-byte region [ffff88803c45f000, ffff88803c45f800)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3c458
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b442f00 ffffea000136ee00 dead000000000002
raw: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801b442f00 ffffea000136ee00 dead000000000002
head: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0000f11601 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5940, tgid 5940 (syz-executor), ts 54767522846, free_ts 50479841967
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3031 [inline]
allocate_slab mm/slub.c:3204 [inline]
new_slab+0x24a/0x360 mm/slub.c:3258
___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4628
__slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4747
__slab_alloc_node mm/slub.c:4823 [inline]
slab_alloc_node mm/slub.c:5234 [inline]
__do_kmalloc_node mm/slub.c:5603 [inline]
__kmalloc_node_track_caller_noprof+0x4db/0x8a0 mm/slub.c:5713
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:601
pskb_expand_head+0x238/0x1030 net/core/skbuff.c:2241
netlink_trim+0x22d/0x310 net/netlink/af_netlink.c:1301
netlink_broadcast_filtered+0xf1/0xf90 net/netlink/af_netlink.c:1514
nlmsg_multicast_filtered include/net/netlink.h:1165 [inline]
nlmsg_multicast include/net/netlink.h:1184 [inline]
nlmsg_notify+0x9e/0x220 net/netlink/af_netlink.c:2595
rtnl_notify net/core/rtnetlink.c:958 [inline]
rtmsg_ifinfo_send net/core/rtnetlink.c:4429 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:4445 [inline]
rtmsg_ifinfo_event net/core/rtnetlink.c:4432 [inline]
rtnetlink_event+0x177/0x1f0 net/core/rtnetlink.c:7014
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2229
page last free pid 28 tgid 28 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
__folio_put+0x329/0x450 mm/swap.c:112
folio_put include/linux/mm.h:1425 [inline]
put_page include/linux/mm.h:1494 [inline]
put_netmem+0x28b/0x300 net/core/skbuff.c:7375
skb_page_unref include/linux/skbuff_ref.h:43 [inline]
__skb_frag_unref include/linux/skbuff_ref.h:56 [inline]
skb_frag_unref include/linux/skbuff_ref.h:71 [inline]
__pskb_trim_head+0x5c7/0x7b0 net/ipv4/tcp_output.c:1864
tcp_trim_head+0x85/0x5f0 net/ipv4/tcp_output.c:1891
tcp_tso_acked net/ipv4/tcp_input.c:3341 [inline]
tcp_clean_rtx_queue net/ipv4/tcp_input.c:3407 [inline]
tcp_ack+0x1da1/0x5fc0 net/ipv4/tcp_input.c:4096
tcp_rcv_established+0x10ea/0x3700 net/ipv4/tcp_input.c:6341
tcp_v4_do_rcv+0x5ca/0xa90 net/ipv4/tcp_ipv4.c:1931
tcp_v4_rcv+0x3077/0x47d0 net/ipv4/tcp_ipv4.c:2374
ip_protocol_deliver_rcu+0xba/0x4c0 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x3f2/0x720 net/ipv4/ip_input.c:239
NF_HOOK include/linux/netfilter.h:318 [inline]
NF_HOOK include/linux/netfilter.h:312 [inline]
ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:260
dst_input include/net/dst.h:474 [inline]
ip_sublist_rcv_finish+0x2ce/0x660 net/ipv4/ip_input.c:584
ip_list_rcv_finish+0x590/0x780 net/ipv4/ip_input.c:636
ip_sublist_rcv net/ipv4/ip_input.c:644 [inline]
ip_list_rcv+0x335/0x450 net/ipv4/ip_input.c:678
__netif_receive_skb_list_ptype net/core/dev.c:6122 [inline]
__netif_receive_skb_list_core+0x752/0x950 net/core/dev.c:6169
Memory state around the buggy address:
ffff88803c45f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88803c45f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88803c45f180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88803c45f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88803c45f280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================