Bluetooth: hci1: link tx timeout
Bluetooth: hci1: killing stalled connection 11:aa:aa:aa:aa:aa
==================================================================
BUG: KASAN: slab-use-after-free in hci_disconnect+0x1fe/0x220 net/bluetooth/hci_conn.c:189
Read of size 4 at addr ffff8880371a003c by task kworker/u9:0/28830

CPU: 1 UID: 0 PID: 28830 Comm: kworker/u9:0 Not tainted 6.15.0-rc4-syzkaller-00147-gebd297a2affa #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: hci1 hci_tx_work
Call Trace:
 <TASK>
 __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:408 [inline]
 print_report+0xc3/0x670 mm/kasan/report.c:521
 kasan_report+0xe0/0x110 mm/kasan/report.c:634
 hci_disconnect+0x1fe/0x220 net/bluetooth/hci_conn.c:189
 hci_link_tx_to net/bluetooth/hci_core.c:3417 [inline]
 __check_timeout net/bluetooth/hci_core.c:3558 [inline]
 __check_timeout+0x3f7/0x730 net/bluetooth/hci_core.c:3538
 hci_sched_le net/bluetooth/hci_core.c:3669 [inline]
 hci_tx_work+0x6ee/0x1490 net/bluetooth/hci_core.c:3742
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 336:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 __hci_conn_add+0x130/0x1b70 net/bluetooth/hci_conn.c:936
 hci_conn_add_unset+0x6d/0x100 net/bluetooth/hci_conn.c:1047
 le_conn_complete_evt+0x791/0x1d70 net/bluetooth/hci_event.c:5653
 hci_le_conn_complete_evt+0x23c/0x370 net/bluetooth/hci_event.c:5805
 hci_le_meta_evt+0x2f3/0x5e0 net/bluetooth/hci_event.c:7175
 hci_event_func net/bluetooth/hci_event.c:7483 [inline]
 hci_event_packet+0x669/0x1190 net/bluetooth/hci_event.c:7538
 hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4020
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 798:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2398 [inline]
 slab_free mm/slub.c:4656 [inline]
 kfree+0x2b6/0x4d0 mm/slub.c:4855
 device_release+0xa1/0x240 drivers/base/core.c:2568
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1e4/0x5a0 lib/kobject.c:737
 put_device drivers/base/core.c:3800 [inline]
 device_unregister+0x2f/0xc0 drivers/base/core.c:3923
 hci_conn_del_sysfs+0xb4/0x180 net/bluetooth/hci_sysfs.c:79
 hci_conn_cleanup net/bluetooth/hci_conn.c:175 [inline]
 hci_conn_del+0x55f/0xdc0 net/bluetooth/hci_conn.c:1167
 hci_abort_conn_sync+0x740/0xb40 net/bluetooth/hci_sync.c:5616
 abort_conn_sync+0x197/0x360 net/bluetooth/hci_conn.c:2859
 hci_cmd_sync_work+0x1a8/0x430 net/bluetooth/hci_sync.c:332
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff8880371a0000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 60 bytes inside of
 freed 8192-byte region [ffff8880371a0000, ffff8880371a2000)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x371a0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b442280 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801b442280 0000000000000000 dead000000000001
head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0000dc6801 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 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 18466647615, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1718
 prep_new_page mm/page_alloc.c:1726 [inline]
 get_page_from_freelist+0x135c/0x3920 mm/page_alloc.c:3688
 __alloc_frozen_pages_noprof+0x263/0x23a0 mm/page_alloc.c:4970
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2301
 alloc_slab_page mm/slub.c:2468 [inline]
 allocate_slab mm/slub.c:2632 [inline]
 new_slab+0x244/0x340 mm/slub.c:2686
 ___slab_alloc+0xd9c/0x1940 mm/slub.c:3872
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3962
 __slab_alloc_node mm/slub.c:4037 [inline]
 slab_alloc_node mm/slub.c:4198 [inline]
 __kmalloc_cache_noprof+0xfb/0x3e0 mm/slub.c:4367
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 tomoyo_print_bprm security/tomoyo/audit.c:26 [inline]
 tomoyo_init_log+0xc8a/0x2140 security/tomoyo/audit.c:264
 tomoyo_supervisor+0x302/0x13b0 security/tomoyo/common.c:2198
 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline]
 tomoyo_env_perm+0x191/0x200 security/tomoyo/environ.c:63
 tomoyo_environ security/tomoyo/domain.c:672 [inline]
 tomoyo_find_next_domain+0xec2/0x20b0 security/tomoyo/domain.c:888
 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:102 [inline]
 tomoyo_bprm_check_security+0x12e/0x1d0 security/tomoyo/tomoyo.c:92
 security_bprm_check+0x1b9/0x1e0 security/security.c:1302
 search_binary_handler fs/exec.c:1768 [inline]
 exec_binprm fs/exec.c:1810 [inline]
 bprm_execve fs/exec.c:1862 [inline]
 bprm_execve+0x810/0x1650 fs/exec.c:1838
 kernel_execve+0x2ef/0x3b0 fs/exec.c:2028
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88803719ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803719ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880371a0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff8880371a0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880371a0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================