Bluetooth: Wrong link type (-22) Bluetooth: Unknown BR/EDR signaling command 0x11 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 ffff88807927c010 by task kworker/u9:6/5093 CPU: 0 PID: 5093 Comm: kworker/u9:6 Not tainted 6.10.0-rc7-syzkaller-00231-ge091caf99f3a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: hci7 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+0x22ed/0x10830 net/bluetooth/l2cap_core.c:6824 hci_acldata_packet net/bluetooth/hci_core.c:3810 [inline] hci_rx_work+0x50f/0xca0 net/bluetooth/hci_core.c:4047 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 Allocated by task 5093: 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] l2cap_conn_add+0xa9/0x8e0 net/bluetooth/l2cap_core.c:6867 l2cap_connect_cfm+0x136/0x1220 net/bluetooth/l2cap_core.c:7244 hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline] hci_remote_features_evt+0x536/0xaf0 net/bluetooth/hci_event.c:3721 hci_event_func net/bluetooth/hci_event.c:7444 [inline] hci_event_packet+0xac0/0x1540 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 13133: 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 l2cap_connect_cfm+0x11f/0x1220 net/bluetooth/l2cap_core.c:7240 hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline] hci_conn_failed+0x1f6/0x340 net/bluetooth/hci_conn.c:1266 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 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:2208 __queue_work+0xc16/0xee0 kernel/workqueue.c:2360 call_timer_fn+0x18e/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+0x2c4/0x970 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:2208 __queue_work+0xaf2/0xee0 kernel/workqueue.c:2364 queue_work_on+0x1c2/0x380 kernel/workqueue.c:2411 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:7285 hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline] hci_remote_features_evt+0x536/0xaf0 net/bluetooth/hci_event.c:3721 hci_event_func net/bluetooth/hci_event.c:7444 [inline] hci_event_packet+0xac0/0x1540 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 The buggy address belongs to the object at ffff88807927c000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 16 bytes inside of freed 1024-byte region [ffff88807927c000, ffff88807927c400) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x79278 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 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000100010 00000001ffffefff 0000000000000000 head: 00fff00000000040 ffff888015041dc0 dead000000000100 dead000000000122 head: 0000000000000000 0000000000100010 00000001ffffefff 0000000000000000 head: 00fff00000000003 ffffea0001e49e01 ffffffffffffffff 0000000000000000 head: ffff888000000008 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 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 61, tgid 61 (kworker/u8:4), ts 405394155299, free_ts 405346137328 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:597 pskb_expand_head+0x202/0x1390 net/core/skbuff.c:2240 __skb_cow include/linux/skbuff.h:3609 [inline] skb_cow_head include/linux/skbuff.h:3643 [inline] batadv_skb_head_push+0x164/0x200 net/batman-adv/soft-interface.c:72 batadv_send_skb_packet+0xee/0x670 net/batman-adv/send.c:86 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:392 [inline] batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:420 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x673/0x810 net/batman-adv/bat_iv_ogm.c:1700 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 page last free pid 9675 tgid 9675 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1093 [inline] free_unref_page+0xd19/0xea0 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_noprof+0x1a3/0x400 mm/slub.c:4136 kmalloc_noprof include/linux/slab.h:664 [inline] allocate_probes kernel/tracepoint.c:109 [inline] func_remove kernel/tracepoint.c:267 [inline] tracepoint_remove_func kernel/tracepoint.c:403 [inline] tracepoint_probe_unregister+0x25f/0x990 kernel/tracepoint.c:551 bpf_raw_tp_link_release+0x45/0x70 kernel/bpf/syscall.c:3520 bpf_link_free+0xf5/0x250 kernel/bpf/syscall.c:3067 bpf_link_put_direct kernel/bpf/syscall.c:3107 [inline] bpf_link_release+0x7b/0x90 kernel/bpf/syscall.c:3114 __fput+0x24a/0x8a0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x360 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 Memory state around the buggy address: ffff88807927bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807927bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807927c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807927c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807927c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================