Bluetooth: Wrong link type (-22) Bluetooth: Unknown BR/EDR signaling command 0x10 Bluetooth: Wrong link type (-22) Bluetooth: Unknown BR/EDR signaling command 0x0e Bluetooth: Wrong link type (-22) ================================================================== BUG: KASAN: slab-use-after-free in l2cap_build_cmd net/bluetooth/l2cap_core.c:2951 [inline] BUG: KASAN: slab-use-after-free in l2cap_send_cmd+0x679/0x8d0 net/bluetooth/l2cap_core.c:954 Read of size 4 at addr ffff888079adf810 by task kworker/u9:0/53 CPU: 1 PID: 53 Comm: kworker/u9:0 Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: hci2 hci_rx_work Call Trace: __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 l2cap_build_cmd net/bluetooth/l2cap_core.c:2951 [inline] l2cap_send_cmd+0x679/0x8d0 net/bluetooth/l2cap_core.c:954 l2cap_sig_send_rej net/bluetooth/l2cap_core.c:5510 [inline] l2cap_sig_channel net/bluetooth/l2cap_core.c:5546 [inline] l2cap_recv_frame+0x22a1/0x107d0 net/bluetooth/l2cap_core.c:6821 hci_acldata_packet net/bluetooth/hci_core.c:3842 [inline] hci_rx_work+0x50f/0xca0 net/bluetooth/hci_core.c:4079 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 5106: 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:4153 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] l2cap_conn_add+0xa9/0x8e0 net/bluetooth/l2cap_core.c:6864 l2cap_connect_cfm+0x136/0x1220 net/bluetooth/l2cap_core.c:7241 hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline] hci_remote_features_evt+0x538/0xaf0 net/bluetooth/hci_event.c:3721 hci_event_func net/bluetooth/hci_event.c:7417 [inline] hci_event_packet+0xac2/0x1540 net/bluetooth/hci_event.c:7469 hci_rx_work+0x3e8/0xca0 net/bluetooth/hci_core.c:4074 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Freed by task 5098: 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:4437 [inline] kfree+0x149/0x360 mm/slub.c:4558 l2cap_connect_cfm+0x11f/0x1220 net/bluetooth/l2cap_core.c:7237 hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline] hci_conn_failed+0x1f8/0x340 net/bluetooth/hci_conn.c:1257 hci_abort_conn_sync+0x583/0xde0 net/bluetooth/hci_sync.c:5450 hci_cmd_sync_work+0x22d/0x400 net/bluetooth/hci_sync.c:310 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 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:541 insert_work+0x3e/0x330 kernel/workqueue.c:2207 __queue_work+0xc16/0xee0 kernel/workqueue.c:2359 call_timer_fn+0x190/0x650 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1838 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x695/0x8e0 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447 handle_softirqs+0x2c6/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 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:541 insert_work+0x3e/0x330 kernel/workqueue.c:2207 __queue_work+0xaf2/0xee0 kernel/workqueue.c:2363 queue_work_on+0x1c2/0x380 kernel/workqueue.c:2410 queue_work include/linux/workqueue.h:621 [inline] l2cap_conn_ready net/bluetooth/l2cap_core.c:1640 [inline] l2cap_connect_cfm+0xec2/0x1220 net/bluetooth/l2cap_core.c:7282 hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline] hci_remote_features_evt+0x538/0xaf0 net/bluetooth/hci_event.c:3721 hci_event_func net/bluetooth/hci_event.c:7417 [inline] hci_event_packet+0xac2/0x1540 net/bluetooth/hci_event.c:7469 hci_rx_work+0x3e8/0xca0 net/bluetooth/hci_core.c:4074 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/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 ffff888079adf800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 16 bytes inside of freed 1024-byte region [ffff888079adf800, ffff888079adfc00) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888079adc800 pfn:0x79ad8 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: 0xffffefff(slab) raw: 00fff00000000040 ffff888015041dc0 ffffea0001fe1600 dead000000000002 raw: ffff888079adc800 000000000010000d 00000001ffffefff 0000000000000000 head: 00fff00000000040 ffff888015041dc0 ffffea0001fe1600 dead000000000002 head: ffff888079adc800 000000000010000d 00000001ffffefff 0000000000000000 head: 00fff00000000003 ffffea0001e6b601 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 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 57, tgid 57 (kworker/u8:4), ts 91148613629, free_ts 91128997931 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x2e43/0x2f00 mm/page_alloc.c:3420 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4678 __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:3989 [inline] __do_kmalloc_node mm/slub.c:4121 [inline] __kmalloc_noprof+0x257/0x400 mm/slub.c:4135 kmalloc_noprof include/linux/slab.h:664 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] neigh_alloc net/core/neighbour.c:494 [inline] ___neigh_create+0x691/0x2470 net/core/neighbour.c:648 ip6_finish_output2+0x1629/0x1670 net/ipv6/ip6_output.c:128 ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:222 NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xab0/0x1380 net/ipv6/ndisc.c:509 addrconf_dad_completed+0x76c/0xcd0 net/ipv6/addrconf.c:4359 addrconf_dad_work+0xdc2/0x16f0 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 page last free pid 5094 tgid 5094 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2583 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:4307 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:3941 [inline] slab_alloc_node mm/slub.c:4001 [inline] kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4020 __d_alloc+0x31/0x700 fs/dcache.c:1624 d_alloc fs/dcache.c:1704 [inline] d_alloc_parallel+0xdf/0x1600 fs/dcache.c:2462 __lookup_slow+0x117/0x3f0 fs/namei.c:1677 lookup_one_len+0x18b/0x2d0 fs/namei.c:2764 start_creating+0x187/0x310 fs/debugfs/inode.c:378 __debugfs_create_file+0x73/0x4b0 fs/debugfs/inode.c:423 drv_add_interface+0x579/0x8e0 net/mac80211/driver-ops.c:83 ieee80211_do_open+0x6d5/0x22d0 net/mac80211/iface.c:1354 Memory state around the buggy address: ffff888079adf700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888079adf780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888079adf800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888079adf880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888079adf900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================