Bluetooth: Unexpected continuation frame (len 19) Bluetooth: unknown link type 42 Bluetooth: hci3: hardware error 0x1f ================================================================== BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:71 [inline] BUG: KASAN: use-after-free in atomic_long_read include/linux/atomic/atomic-instrumented.h:1265 [inline] BUG: KASAN: use-after-free in __mutex_unlock_slowpath+0xa6/0x5e0 kernel/locking/mutex.c:916 Read of size 8 at addr ffff88807cf554b8 by task kworker/u5:5/3652 CPU: 1 PID: 3652 Comm: kworker/u5:5 Not tainted 6.0.0-rc3-next-20220829-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Workqueue: hci3 hci_error_reset Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:317 [inline] print_report.cold+0x2ba/0x719 mm/kasan/report.c:433 kasan_report+0xb1/0x1e0 mm/kasan/report.c:495 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:71 [inline] atomic_long_read include/linux/atomic/atomic-instrumented.h:1265 [inline] __mutex_unlock_slowpath+0xa6/0x5e0 kernel/locking/mutex.c:916 l2cap_chan_unlock include/net/bluetooth/l2cap.h:860 [inline] l2cap_conn_del+0x404/0x7b0 net/bluetooth/l2cap_core.c:1926 l2cap_disconn_cfm net/bluetooth/l2cap_core.c:8212 [inline] l2cap_disconn_cfm+0x8c/0xc0 net/bluetooth/l2cap_core.c:8205 hci_disconn_cfm include/net/bluetooth/hci_core.h:1779 [inline] hci_conn_hash_flush+0x122/0x260 net/bluetooth/hci_conn.c:2430 hci_dev_close_sync+0x5c4/0x1200 net/bluetooth/hci_sync.c:4737 hci_dev_do_close+0x2d/0x70 net/bluetooth/hci_core.c:554 hci_error_reset+0x96/0x130 net/bluetooth/hci_core.c:1050 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 3652: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] ____kasan_kmalloc mm/kasan/common.c:516 [inline] ____kasan_kmalloc mm/kasan/common.c:475 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525 kmalloc include/linux/slab.h:559 [inline] kzalloc include/linux/slab.h:695 [inline] l2cap_chan_create+0x40/0x570 net/bluetooth/l2cap_core.c:463 a2mp_chan_open net/bluetooth/a2mp.c:771 [inline] amp_mgr_create+0x8f/0x960 net/bluetooth/a2mp.c:862 a2mp_channel_create+0x7d/0x150 net/bluetooth/a2mp.c:894 l2cap_data_channel net/bluetooth/l2cap_core.c:7569 [inline] l2cap_recv_frame+0x48e3/0x8d90 net/bluetooth/l2cap_core.c:7724 l2cap_recv_acldata+0xaa6/0xc00 net/bluetooth/l2cap_core.c:8429 hci_acldata_packet net/bluetooth/hci_core.c:3777 [inline] hci_rx_work+0x705/0x1230 net/bluetooth/hci_core.c:4012 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Freed by task 3652: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:367 [inline] ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:329 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1651 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1677 slab_free mm/slub.c:3580 [inline] __kmem_cache_free+0xab/0x3b0 mm/slub.c:3593 l2cap_chan_destroy net/bluetooth/l2cap_core.c:503 [inline] kref_put include/linux/kref.h:65 [inline] l2cap_chan_put+0x22a/0x2d0 net/bluetooth/l2cap_core.c:527 l2cap_conn_del+0x3fc/0x7b0 net/bluetooth/l2cap_core.c:1924 l2cap_disconn_cfm net/bluetooth/l2cap_core.c:8212 [inline] l2cap_disconn_cfm+0x8c/0xc0 net/bluetooth/l2cap_core.c:8205 hci_disconn_cfm include/net/bluetooth/hci_core.h:1779 [inline] hci_conn_hash_flush+0x122/0x260 net/bluetooth/hci_conn.c:2430 hci_dev_close_sync+0x5c4/0x1200 net/bluetooth/hci_sync.c:4737 hci_dev_do_close+0x2d/0x70 net/bluetooth/hci_core.c:554 hci_error_reset+0x96/0x130 net/bluetooth/hci_core.c:1050 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348 call_rcu+0x99/0x790 kernel/rcu/tree.c:2796 sk_destruct net/core/sock.c:2154 [inline] __sk_free+0x144/0x460 net/core/sock.c:2167 sk_free+0x78/0xa0 net/core/sock.c:2178 sock_put include/net/sock.h:1983 [inline] j1939_sk_release+0x513/0x790 net/can/j1939/socket.c:646 __sock_release+0xcd/0x280 net/socket.c:650 sock_close+0x18/0x20 net/socket.c:1365 __fput+0x27c/0xa90 fs/file_table.c:320 task_work_run+0x16b/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348 call_rcu+0x99/0x790 kernel/rcu/tree.c:2796 netlink_release+0xeff/0x1db0 net/netlink/af_netlink.c:815 __sock_release+0xcd/0x280 net/socket.c:650 sock_close+0x18/0x20 net/socket.c:1365 __fput+0x27c/0xa90 fs/file_table.c:320 task_work_run+0x16b/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807cf55000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1208 bytes inside of 2048-byte region [ffff88807cf55000, ffff88807cf55800) The buggy address belongs to the physical page: page:ffffea0001f3d400 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807cf57000 pfn:0x7cf50 head:ffffea0001f3d400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001ea5408 ffffea0000e67408 ffff888011842000 raw: ffff88807cf57000 0000000000080006 00000001ffffffff 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2960, tgid 2960 (acpid), ts 13225564959, free_ts 12000642821 prep_new_page mm/page_alloc.c:2534 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4285 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5543 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2280 alloc_slab_page mm/slub.c:1721 [inline] allocate_slab+0x228/0x370 mm/slub.c:1866 new_slab mm/slub.c:1919 [inline] ___slab_alloc+0xad0/0x1440 mm/slub.c:3100 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3198 slab_alloc_node mm/slub.c:3283 [inline] __kmem_cache_alloc_node+0x18a/0x3d0 mm/slub.c:3356 __do_kmalloc_node mm/slab_common.c:929 [inline] __kmalloc_node+0x47/0xc0 mm/slab_common.c:937 kmalloc_node include/linux/slab.h:585 [inline] kvmalloc_node+0x3e/0x190 mm/util.c:581 kvmalloc include/linux/slab.h:712 [inline] kvzalloc include/linux/slab.h:720 [inline] evdev_open+0x117/0x6a0 drivers/input/evdev.c:477 chrdev_open+0x266/0x770 fs/char_dev.c:414 do_dentry_open+0x6cc/0x13f0 fs/open.c:880 do_open fs/namei.c:3557 [inline] path_openat+0x1c92/0x28f0 fs/namei.c:3691 do_filp_open+0x1b6/0x400 fs/namei.c:3718 do_sys_openat2+0x16d/0x4c0 fs/open.c:1308 do_sys_open fs/open.c:1324 [inline] __do_sys_openat fs/open.c:1340 [inline] __se_sys_openat fs/open.c:1335 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1335 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1451 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1501 free_unref_page_prepare mm/page_alloc.c:3382 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3478 free_contig_range+0xb1/0x180 mm/page_alloc.c:9460 destroy_args+0xa8/0x64c mm/debug_vm_pgtable.c:1031 debug_vm_pgtable+0x2954/0x29e5 mm/debug_vm_pgtable.c:1354 do_one_initcall+0xfe/0x650 init/main.c:1304 do_initcall_level init/main.c:1379 [inline] do_initcalls init/main.c:1395 [inline] do_basic_setup init/main.c:1414 [inline] kernel_init_freeable+0x6ff/0x788 init/main.c:1634 kernel_init+0x1a/0x1d0 init/main.c:1522 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Memory state around the buggy address: ffff88807cf55380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807cf55400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807cf55480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807cf55500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807cf55580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================