=========================
WARNING: held lock freed!
syzkaller #0 Tainted: G L
-------------------------
syz.7.3745/18680 is freeing memory ffff8880224a1000-ffff8880224a17ff, with a lock still held there!
ffff8880224a1260 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1700 [inline]
ffff8880224a1260 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+.}-{0:0}, at: bt_accept_dequeue+0x24c/0x6b0 net/bluetooth/af_bluetooth.c:279
3 locks held by syz.7.3745/18680:
#0: ffff8880287ca488 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
#0: ffff8880287ca488 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: __sock_release+0x86/0x270 net/socket.c:661
#1: ffff88802228f260 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP/2){+.+.}-{0:0}, at: l2cap_sock_release+0x61/0x280 net/bluetooth/l2cap_sock.c:1425
#2: ffff8880224a1260 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1700 [inline]
#2: ffff8880224a1260 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+.}-{0:0}, at: bt_accept_dequeue+0x24c/0x6b0 net/bluetooth/af_bluetooth.c:279
stack backtrace:
CPU: 3 UID: 0 PID: 18680 Comm: syz.7.3745 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
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:2468 [inline]
slab_free mm/slub.c:6670 [inline]
kfree+0x1e4/0x6e0 mm/slub.c:6878
sk_prot_free net/core/sock.c:2284 [inline]
__sk_destruct+0x8b1/0xbc0 net/core/sock.c:2384
sk_destruct+0xc2/0xf0 net/core/sock.c:2412
__sk_free+0xf4/0x3e0 net/core/sock.c:2423
sk_free+0x6a/0x90 net/core/sock.c:2434
sock_put include/net/sock.h:1998 [inline]
bt_accept_unlink+0x1f1/0x300 net/bluetooth/af_bluetooth.c:262
bt_accept_dequeue+0x588/0x6b0 net/bluetooth/af_bluetooth.c:308
l2cap_sock_cleanup_listen+0x5c/0x2f0 net/bluetooth/l2cap_sock.c:1454
l2cap_sock_release+0x69/0x280 net/bluetooth/l2cap_sock.c:1426
__sock_release+0xb3/0x270 net/socket.c:662
sock_close+0x1c/0x30 net/socket.c:1455
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
exit_to_user_mode_loop+0xfb/0x540 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd78018f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff34bf51c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fd7803e7da0 RCX: 00007fd78018f7c9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fd7803e7da0 R08: 000000000000256c R09: 0000001e34bf54bf
R10: 00007fd7803e7cb0 R11: 0000000000000246 R12: 000000000005549c
R13: 00007fd7803e6180 R14: ffffffffffffffff R15: 00007fff34bf52e0
==================================================================
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 ffff8880224a11cc by task syz.7.3745/18680
CPU: 2 UID: 0 PID: 18680 Comm: syz.7.3745 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
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:3793
bt_accept_dequeue+0x576/0x6b0 net/bluetooth/af_bluetooth.c:312
l2cap_sock_cleanup_listen+0x5c/0x2f0 net/bluetooth/l2cap_sock.c:1454
l2cap_sock_release+0x69/0x280 net/bluetooth/l2cap_sock.c:1426
__sock_release+0xb3/0x270 net/socket.c:662
sock_close+0x1c/0x30 net/socket.c:1455
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
exit_to_user_mode_loop+0xfb/0x540 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd78018f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff34bf51c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fd7803e7da0 RCX: 00007fd78018f7c9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fd7803e7da0 R08: 000000000000256c R09: 0000001e34bf54bf
R10: 00007fd7803e7cb0 R11: 0000000000000246 R12: 000000000005549c
R13: 00007fd7803e6180 R14: ffffffffffffffff R15: 00007fff34bf52e0
Allocated by task 5944:
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:397 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:414
kasan_kmalloc include/linux/kasan.h:262 [inline]
__do_kmalloc_node mm/slub.c:5657 [inline]
__kmalloc_noprof+0x33d/0x910 mm/slub.c:5669
kmalloc_noprof include/linux/slab.h:961 [inline]
sk_prot_alloc+0x1a8/0x2a0 net/core/sock.c:2245
sk_alloc+0x36/0xe30 net/core/sock.c:2301
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+0x4f0/0x1010 net/bluetooth/l2cap_core.c:7288
hci_connect_cfm include/net/bluetooth/hci_core.h:2131 [inline]
hci_remote_features_evt+0x506/0x9c0 net/bluetooth/hci_event.c:3729
hci_event_func net/bluetooth/hci_event.c:7719 [inline]
hci_event_packet+0xa39/0x1210 net/bluetooth/hci_event.c:7773
hci_rx_work+0x2c9/0x1020 net/bluetooth/hci_core.c:4076
process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Freed by task 18680:
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:584
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:2540 [inline]
slab_free mm/slub.c:6670 [inline]
kfree+0x2f8/0x6e0 mm/slub.c:6878
sk_prot_free net/core/sock.c:2284 [inline]
__sk_destruct+0x8b1/0xbc0 net/core/sock.c:2384
sk_destruct+0xc2/0xf0 net/core/sock.c:2412
__sk_free+0xf4/0x3e0 net/core/sock.c:2423
sk_free+0x6a/0x90 net/core/sock.c:2434
sock_put include/net/sock.h:1998 [inline]
bt_accept_unlink+0x1f1/0x300 net/bluetooth/af_bluetooth.c:262
bt_accept_dequeue+0x588/0x6b0 net/bluetooth/af_bluetooth.c:308
l2cap_sock_cleanup_listen+0x5c/0x2f0 net/bluetooth/l2cap_sock.c:1454
l2cap_sock_release+0x69/0x280 net/bluetooth/l2cap_sock.c:1426
__sock_release+0xb3/0x270 net/socket.c:662
sock_close+0x1c/0x30 net/socket.c:1455
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
exit_to_user_mode_loop+0xfb/0x540 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880224a1000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 460 bytes inside of
freed 2048-byte region [ffff8880224a1000, ffff8880224a1800)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x224a0
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 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801b442f00 dead000000000100 dead000000000122
head: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0000892801 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 3478569693, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1846
prep_new_page mm/page_alloc.c:1854 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486
alloc_slab_page mm/slub.c:3075 [inline]
allocate_slab mm/slub.c:3248 [inline]
new_slab+0x2c3/0x430 mm/slub.c:3302
___slab_alloc+0xe18/0x1c90 mm/slub.c:4656
__slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4779
__slab_alloc_node mm/slub.c:4855 [inline]
slab_alloc_node mm/slub.c:5251 [inline]
__kmalloc_cache_noprof+0x485/0x800 mm/slub.c:5771
kmalloc_noprof include/linux/slab.h:957 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
acpi_ds_create_walk_state+0x95/0x300 drivers/acpi/acpica/dswstate.c:518
acpi_ps_execute_method+0x2c1/0xe90 drivers/acpi/acpica/psxface.c:134
acpi_ns_evaluate+0x98c/0x16d0 drivers/acpi/acpica/nseval.c:205
acpi_evaluate_object+0x4ca/0xdf0 drivers/acpi/acpica/nsxfeval.c:354
acpi_evaluate_integer+0xdd/0x230 drivers/acpi/utils.c:260
acpi_bus_get_status_handle drivers/acpi/bus.c:82 [inline]
acpi_bus_get_status+0x1a0/0x470 drivers/acpi/bus.c:111
acpi_bus_attach+0xde/0xcb0 drivers/acpi/scan.c:2285
acpi_dev_for_one_check drivers/acpi/bus.c:1145 [inline]
acpi_dev_for_one_check+0x97/0xd0 drivers/acpi/bus.c:1138
page_owner free stack trace missing
Memory state around the buggy address:
ffff8880224a1080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880224a1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880224a1180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880224a1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880224a1280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================