Bluetooth: Unknown BR/EDR signaling command 0x0e Bluetooth: Wrong link type (-22) ================================================================== BUG: KASAN: slab-use-after-free in l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949 Read of size 8 at addr ffff88807e0bf800 by task kworker/u9:4/5233 CPU: 0 UID: 0 PID: 5233 Comm: kworker/u9:4 Not tainted 6.11.0-rc4-syzkaller-00135-gaa0743a22936 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: hci5 hci_rx_work Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949 l2cap_connect_req net/bluetooth/l2cap_core.c:4080 [inline] l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:4772 [inline] l2cap_sig_channel net/bluetooth/l2cap_core.c:5543 [inline] l2cap_recv_frame+0xf0b/0x8eb0 net/bluetooth/l2cap_core.c:6825 l2cap_recv_acldata+0x9b4/0xb70 net/bluetooth/l2cap_core.c:7514 hci_acldata_packet net/bluetooth/hci_core.c:3785 [inline] hci_rx_work+0xaab/0x1610 net/bluetooth/hci_core.c:4022 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 5232: 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:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] l2cap_conn_add.part.0+0x60/0xa60 net/bluetooth/l2cap_core.c:6868 l2cap_conn_add net/bluetooth/l2cap_core.c:69 [inline] l2cap_connect_cfm+0x428/0xf80 net/bluetooth/l2cap_core.c:7245 hci_connect_cfm include/net/bluetooth/hci_core.h:1965 [inline] hci_remote_features_evt+0x548/0x9e0 net/bluetooth/hci_event.c:3721 hci_event_func net/bluetooth/hci_event.c:7446 [inline] hci_event_packet+0x9eb/0x1180 net/bluetooth/hci_event.c:7498 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4017 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Freed by task 5232: 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:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2252 [inline] slab_free mm/slub.c:4473 [inline] kfree+0x12a/0x3b0 mm/slub.c:4594 l2cap_conn_free net/bluetooth/l2cap_core.c:1810 [inline] kref_put include/linux/kref.h:65 [inline] l2cap_conn_put net/bluetooth/l2cap_core.c:1822 [inline] l2cap_conn_del+0x59d/0x730 net/bluetooth/l2cap_core.c:1802 l2cap_connect_cfm+0x9e6/0xf80 net/bluetooth/l2cap_core.c:7241 hci_connect_cfm include/net/bluetooth/hci_core.h:1965 [inline] hci_conn_failed+0x1c3/0x370 net/bluetooth/hci_conn.c:1265 hci_abort_conn_sync+0x75a/0xb50 net/bluetooth/hci_sync.c:5545 abort_conn_sync+0x197/0x360 net/bluetooth/hci_conn.c:2917 hci_cmd_sync_work+0x1a4/0x410 net/bluetooth/hci_sync.c:328 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 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+0x33/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541 insert_work+0x36/0x230 kernel/workqueue.c:2185 __queue_work+0x97e/0x1070 kernel/workqueue.c:2341 call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1838 [inline] __run_timers+0x567/0xaf0 kernel/time/timer.c:2417 __run_timer_base kernel/time/timer.c:2428 [inline] __run_timer_base kernel/time/timer.c:2421 [inline] run_timer_base+0x111/0x190 kernel/time/timer.c:2437 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2447 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 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+0x33/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541 insert_work+0x36/0x230 kernel/workqueue.c:2185 __queue_work+0x3f8/0x1070 kernel/workqueue.c:2345 queue_work_on+0x11a/0x140 kernel/workqueue.c:2392 queue_work include/linux/workqueue.h:621 [inline] l2cap_conn_ready net/bluetooth/l2cap_core.c:1640 [inline] l2cap_connect_cfm+0x9c9/0xf80 net/bluetooth/l2cap_core.c:7286 hci_connect_cfm include/net/bluetooth/hci_core.h:1965 [inline] hci_remote_features_evt+0x548/0x9e0 net/bluetooth/hci_event.c:3721 hci_event_func net/bluetooth/hci_event.c:7446 [inline] hci_event_packet+0x9eb/0x1180 net/bluetooth/hci_event.c:7498 hci_rx_work+0x2c6/0x1610 net/bluetooth/hci_core.c:4017 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 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 ffff88807e0bf800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 0 bytes inside of freed 1024-byte region [ffff88807e0bf800, ffff88807e0bfc00) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e0b8 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: 0xfdffffff(slab) raw: 00fff00000000040 ffff888015841dc0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000100010 00000001fdffffff 0000000000000000 head: 00fff00000000040 ffff888015841dc0 dead000000000100 dead000000000122 head: 0000000000000000 0000000000100010 00000001fdffffff 0000000000000000 head: 00fff00000000003 ffffea0001f82e01 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 6893, tgid 6893 (syz-executor), ts 357991789147, free_ts 355106941550 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3439 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4695 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x4e/0xf0 mm/slub.c:2321 allocate_slab mm/slub.c:2484 [inline] new_slab+0x84/0x260 mm/slub.c:2537 ___slab_alloc+0xdac/0x1870 mm/slub.c:3723 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3813 __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] __do_kmalloc_node mm/slub.c:4157 [inline] __kmalloc_node_noprof+0x357/0x430 mm/slub.c:4164 __kvmalloc_node_noprof+0x9d/0x1a0 mm/util.c:650 bucket_table_alloc.isra.0+0x86/0x470 lib/rhashtable.c:186 rhashtable_init_noprof+0x41a/0x7e0 lib/rhashtable.c:1071 ioam6_net_init+0xb1/0x170 net/ipv6/ioam6.c:974 ops_init+0xb9/0x650 net/core/net_namespace.c:139 setup_net+0x435/0xb40 net/core/net_namespace.c:343 copy_net_ns+0x2fb/0x700 net/core/net_namespace.c:508 create_new_namespaces+0x3ea/0xad0 kernel/nsproxy.c:110 page last free pid 6436 tgid 6436 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2612 vfree+0x181/0x7a0 mm/vmalloc.c:3364 kcov_put kernel/kcov.c:438 [inline] kcov_put+0x2a/0x40 kernel/kcov.c:434 kcov_close+0x10/0x20 kernel/kcov.c:534 __fput+0x408/0xbb0 fs/file_table.c:422 task_work_run+0x14e/0x250 kernel/task_work.c:228 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xaa3/0x2bb0 kernel/exit.c:882 do_group_exit+0xd3/0x2a0 kernel/exit.c:1031 get_signal+0x25fd/0x2770 kernel/signal.c:2917 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [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+0x150/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88807e0bf700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807e0bf780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807e0bf800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807e0bf880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807e0bf900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================