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BUG: KASAN: slab-use-after-free in __hci_acl_create_connection_sync+0x6e4/0x9c0 net/bluetooth/hci_sync.c:6518
Write of size 2 at addr ffff888015378036 by task kworker/u9:3/5105
CPU: 0 PID: 5105 Comm: kworker/u9:3 Not tainted 6.8.0-rc4-next-20240214-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: hci4 hci_cmd_sync_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
__hci_acl_create_connection_sync+0x6e4/0x9c0 net/bluetooth/hci_sync.c:6518
hci_cmd_sync_work+0x22b/0x400 net/bluetooth/hci_sync.c:306
process_one_work kernel/workqueue.c:3146 [inline]
process_scheduled_works+0x9d7/0x1730 kernel/workqueue.c:3226
worker_thread+0x86d/0xd70 kernel/workqueue.c:3307
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
</TASK>
Allocated by task 27179:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
kmalloc_trace+0x1d9/0x360 mm/slub.c:4013
kmalloc include/linux/slab.h:590 [inline]
kzalloc include/linux/slab.h:711 [inline]
hci_conn_add+0xc7/0x13a0 net/bluetooth/hci_conn.c:914
hci_conn_add_unset net/bluetooth/hci_conn.c:1016 [inline]
hci_connect_acl+0x166/0x4b0 net/bluetooth/hci_conn.c:1632
l2cap_chan_connect+0x5b6/0xeb0 net/bluetooth/l2cap_core.c:7030
l2cap_sock_connect+0x5c9/0x800 net/bluetooth/l2cap_sock.c:256
__sys_connect_file net/socket.c:2048 [inline]
__sys_connect+0x2df/0x310 net/socket.c:2065
__do_sys_connect net/socket.c:2075 [inline]
__se_sys_connect net/socket.c:2072 [inline]
__x64_sys_connect+0x7a/0x90 net/socket.c:2072
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
Freed by task 5105:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:586
poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2122 [inline]
slab_free mm/slub.c:4296 [inline]
kfree+0x14a/0x380 mm/slub.c:4406
device_release+0x99/0x1c0
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x22f/0x480 lib/kobject.c:737
hci_conn_cleanup net/bluetooth/hci_conn.c:176 [inline]
hci_conn_del+0x8f0/0xc70 net/bluetooth/hci_conn.c:1126
hci_abort_conn_sync+0x583/0xde0 net/bluetooth/hci_sync.c:5361
__hci_acl_create_connection_sync+0x622/0x9c0 net/bluetooth/hci_sync.c:6554
hci_cmd_sync_work+0x22b/0x400 net/bluetooth/hci_sync.c:306
process_one_work kernel/workqueue.c:3146 [inline]
process_scheduled_works+0x9d7/0x1730 kernel/workqueue.c:3226
worker_thread+0x86d/0xd70 kernel/workqueue.c:3307
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
Last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:548
insert_work+0x3e/0x330 kernel/workqueue.c:2143
__queue_work+0xc14/0xec0 kernel/workqueue.c:2296
queue_delayed_work_on+0x15a/0x260 kernel/workqueue.c:2491
l2cap_chan_del+0x291/0x5d0 net/bluetooth/l2cap_core.c:647
l2cap_chan_close+0x38b/0x9f0
l2cap_sock_shutdown+0xa64/0x1020 net/bluetooth/l2cap_sock.c:1344
l2cap_sock_release+0x79/0x1d0 net/bluetooth/l2cap_sock.c:1388
__sock_release net/socket.c:659 [inline]
sock_close+0xbc/0x240 net/socket.c:1421
__fput+0x429/0x8a0 fs/file_table.c:411
task_work_run+0x24f/0x310 kernel/task_work.c:180
get_signal+0x1673/0x1850 kernel/signal.c:2683
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:212
do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6d/0x75
Second to last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:548
insert_work+0x3e/0x330 kernel/workqueue.c:2143
__queue_work+0xc14/0xec0 kernel/workqueue.c:2296
queue_delayed_work_on+0x15a/0x260 kernel/workqueue.c:2491
l2cap_chan_del+0x291/0x5d0 net/bluetooth/l2cap_core.c:647
l2cap_chan_close+0x38b/0x9f0
l2cap_sock_shutdown+0xa64/0x1020 net/bluetooth/l2cap_sock.c:1344
l2cap_sock_release+0x79/0x1d0 net/bluetooth/l2cap_sock.c:1388
__sock_release net/socket.c:659 [inline]
sock_close+0xbc/0x240 net/socket.c:1421
__fput+0x429/0x8a0 fs/file_table.c:411
__do_sys_close fs/open.c:1557 [inline]
__se_sys_close fs/open.c:1542 [inline]
__x64_sys_close+0x7f/0x110 fs/open.c:1542
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
The buggy address belongs to the object at ffff888015378000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 54 bytes inside of
freed 4096-byte region [ffff888015378000, ffff888015379000)
The buggy address belongs to the physical page:
page:ffffea000054de00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15378
head:ffffea000054de00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff)
page_type: 0xffffffff()
raw: 00fff80000000840 ffff888014c42140 ffffea0001f31e00 dead000000000002
raw: 0000000000000000 0000000000040004 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 3802344669, free_ts 0
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
prep_new_page mm/page_alloc.c:1540 [inline]
get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311
__alloc_pages+0x256/0x6a0 mm/page_alloc.c:4567
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page+0x5f/0x160 mm/slub.c:2191
allocate_slab mm/slub.c:2354 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2407
___slab_alloc+0xc73/0x1260 mm/slub.c:3541
__slab_alloc mm/slub.c:3626 [inline]
__slab_alloc_node mm/slub.c:3679 [inline]
slab_alloc_node mm/slub.c:3851 [inline]
kmalloc_trace+0x267/0x360 mm/slub.c:4008
kmalloc include/linux/slab.h:590 [inline]
kzalloc include/linux/slab.h:711 [inline]
kobject_uevent_env+0x28b/0x8f0 lib/kobject_uevent.c:524
device_add+0x648/0xca0 drivers/base/core.c:3620
pci_register_host_bridge+0xc4e/0x1960 drivers/pci/probe.c:963
pci_create_root_bus+0x39d/0x450 drivers/pci/probe.c:3052
acpi_pci_root_create+0x778/0xe30 drivers/acpi/pci_root.c:1031
pci_acpi_scan_root+0x3b1/0x620 arch/x86/pci/acpi.c:455
acpi_pci_root_add+0x1faf/0x30f0 drivers/acpi/pci_root.c:733
acpi_scan_attach_handler drivers/acpi/scan.c:2194 [inline]
acpi_bus_attach+0x867/0xcd0 drivers/acpi/scan.c:2241
device_for_each_child+0xf5/0x170 drivers/base/core.c:3968
page_owner free stack trace missing
Memory state around the buggy address:
ffff888015377f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888015377f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888015378000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888015378080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888015378100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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