Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa
Bluetooth: hci0: link tx timeout
Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa
Bluetooth: hci0: link tx timeout
Bluetooth: hci0: killing stalled connection 11:aa:aa:aa:aa:aa
==================================================================
BUG: KASAN: slab-use-after-free in hci_disconnect+0x208/0x2d0 net/bluetooth/hci_conn.c:190
Read of size 1 at addr ffff88802d03003b by task kworker/u9:4/5104

CPU: 0 PID: 5104 Comm: kworker/u9:4 Not tainted 6.10.0-rc6-syzkaller-01258-g2f5e6395714d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: hci0 hci_tx_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_disconnect+0x208/0x2d0 net/bluetooth/hci_conn.c:190
 hci_link_tx_to net/bluetooth/hci_core.c:3438 [inline]
 __check_timeout+0x3a8/0x560 net/bluetooth/hci_core.c:3579
 hci_sched_le net/bluetooth/hci_core.c:3696 [inline]
 hci_tx_work+0xb9e/0x1590 net/bluetooth/hci_core.c:3774
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Allocated by task 5104:
 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_noprof+0x19c/0x2c0 mm/slub.c:4154
 kmalloc_noprof include/linux/slab.h:660 [inline]
 kzalloc_noprof include/linux/slab.h:778 [inline]
 __hci_conn_add+0x2f9/0x1850 net/bluetooth/hci_conn.c:935
 le_conn_complete_evt+0x2f6/0x12e0 net/bluetooth/hci_event.c:5635
 hci_le_conn_complete_evt+0x18c/0x420 net/bluetooth/hci_event.c:5787
 hci_event_func net/bluetooth/hci_event.c:7441 [inline]
 hci_event_packet+0xa55/0x1540 net/bluetooth/hci_event.c:7496
 hci_rx_work+0x3e8/0xca0 net/bluetooth/hci_core.c:4042
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Freed by task 5102:
 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:579
 poison_slab_object+0xe0/0x150 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:2196 [inline]
 slab_free mm/slub.c:4438 [inline]
 kfree+0x149/0x360 mm/slub.c:4559
 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+0x8c4/0xc40 net/bluetooth/hci_conn.c:1163
 hci_abort_conn_sync+0x583/0xde0 net/bluetooth/hci_sync.c:5463
 hci_cmd_sync_work+0x22b/0x400 net/bluetooth/hci_sync.c:323
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

The buggy address belongs to the object at ffff88802d030000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 59 bytes inside of
 freed 8192-byte region [ffff88802d030000, ffff88802d032000)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2d030
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: 0xffffefff(slab)
raw: 00fff00000000040 ffff888015042280 ffffea00017e7000 dead000000000005
raw: 0000000000000000 0000000000020002 00000001ffffefff 0000000000000000
head: 00fff00000000040 ffff888015042280 ffffea00017e7000 dead000000000005
head: 0000000000000000 0000000000020002 00000001ffffefff 0000000000000000
head: 00fff00000000003 ffffea0000b40c01 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 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 0xd28c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4760, tgid 4760 (dhcpcd), ts 48152936254, free_ts 48111512909
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1473
 prep_new_page mm/page_alloc.c:1481 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3425
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4683
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2265
 allocate_slab+0x5a/0x2f0 mm/slub.c:2428
 new_slab mm/slub.c:2481 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3667
 __slab_alloc+0x58/0xa0 mm/slub.c:3757
 __slab_alloc_node mm/slub.c:3810 [inline]
 slab_alloc_node mm/slub.c:3990 [inline]
 __do_kmalloc_node mm/slub.c:4122 [inline]
 kmalloc_node_track_caller_noprof+0x281/0x440 mm/slub.c:4143
 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:605
 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:674
 alloc_skb include/linux/skbuff.h:1320 [inline]
 netlink_dump+0x1f7/0xd80 net/netlink/af_netlink.c:2291
 __netlink_dump_start+0x59f/0x780 net/netlink/af_netlink.c:2440
 netlink_dump_start include/linux/netlink.h:339 [inline]
 rtnetlink_dump_start net/core/rtnetlink.c:6530 [inline]
 rtnetlink_rcv_msg+0xda5/0x1180 net/core/rtnetlink.c:6597
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
page last free pid 4842 tgid 4842 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1093 [inline]
 free_unref_page+0xd22/0xea0 mm/page_alloc.c:2588
 discard_slab mm/slub.c:2527 [inline]
 __put_partials+0xeb/0x130 mm/slub.c:2995
 put_cpu_partial+0x17c/0x250 mm/slub.c:3070
 __slab_free+0x2ea/0x3d0 mm/slub.c:4308
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4002 [inline]
 __do_kmalloc_node mm/slub.c:4122 [inline]
 kmalloc_node_track_caller_noprof+0x1cd/0x440 mm/slub.c:4143
 __do_krealloc mm/slab_common.c:1183 [inline]
 krealloc_noprof+0x7d/0x120 mm/slab_common.c:1216
 ima_collect_measurement+0x5d5/0xb30 security/integrity/ima/ima_api.c:300
 process_measurement+0x1357/0x1fb0 security/integrity/ima/ima_main.c:372
 ima_file_check+0xf2/0x170 security/integrity/ima/ima_main.c:572
 security_file_post_open+0x6d/0xa0 security/security.c:2982
 do_open fs/namei.c:3656 [inline]
 path_openat+0x2c54/0x35f0 fs/namei.c:3813
 do_filp_open+0x235/0x490 fs/namei.c:3840
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1413

Memory state around the buggy address:
 ffff88802d02ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802d02ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802d030000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff88802d030080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802d030100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================