Bluetooth: hci5: Controller not accepting commands anymore: ncmd = 0 Bluetooth: hci5: Injecting HCI hardware error event Bluetooth: hci5: hardware error 0x00 ================================================================== BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:72 [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 ffff88807aed74b8 by task kworker/u5:2/3637 CPU: 0 PID: 3637 Comm: kworker/u5:2 Not tainted 6.1.0-rc2-syzkaller-00062-ga970174d7a10 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Workqueue: hci5 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:284 [inline] print_report+0x15e/0x45d mm/kasan/report.c:395 kasan_report+0xbb/0x1f0 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:72 [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:1932 l2cap_disconn_cfm net/bluetooth/l2cap_core.c:8221 [inline] l2cap_disconn_cfm+0x8c/0xc0 net/bluetooth/l2cap_core.c:8214 hci_disconn_cfm include/net/bluetooth/hci_core.h:1787 [inline] hci_conn_hash_flush+0x122/0x260 net/bluetooth/hci_conn.c:2430 hci_dev_close_sync+0x5f7/0x1200 net/bluetooth/hci_sync.c:4824 hci_dev_do_close+0x2d/0x70 net/bluetooth/hci_core.c:554 hci_error_reset+0x9e/0x140 net/bluetooth/hci_core.c:1059 process_one_work+0x9bf/0x1710 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 3638: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 kasan_set_track+0x21/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0xa1/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:576 [inline] kzalloc include/linux/slab.h:712 [inline] l2cap_chan_create+0x40/0x930 net/bluetooth/l2cap_core.c:466 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:7578 [inline] l2cap_recv_frame+0x51e5/0x9aa0 net/bluetooth/l2cap_core.c:7733 l2cap_recv_acldata+0xaa6/0xc00 net/bluetooth/l2cap_core.c:8438 hci_acldata_packet net/bluetooth/hci_core.c:3809 [inline] hci_rx_work+0x705/0x1230 net/bluetooth/hci_core.c:4044 process_one_work+0x9bf/0x1710 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 3637: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 kasan_set_track+0x21/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2a/0x40 mm/kasan/generic.c:511 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0xab/0x3b0 mm/slub.c:3674 l2cap_chan_destroy net/bluetooth/l2cap_core.c:509 [inline] kref_put include/linux/kref.h:65 [inline] l2cap_chan_put+0x22a/0x2d0 net/bluetooth/l2cap_core.c:533 l2cap_conn_del+0x3fc/0x7b0 net/bluetooth/l2cap_core.c:1930 l2cap_disconn_cfm net/bluetooth/l2cap_core.c:8221 [inline] l2cap_disconn_cfm+0x8c/0xc0 net/bluetooth/l2cap_core.c:8214 hci_disconn_cfm include/net/bluetooth/hci_core.h:1787 [inline] hci_conn_hash_flush+0x122/0x260 net/bluetooth/hci_conn.c:2430 hci_dev_close_sync+0x5f7/0x1200 net/bluetooth/hci_sync.c:4824 hci_dev_do_close+0x2d/0x70 net/bluetooth/hci_core.c:554 hci_error_reset+0x9e/0x140 net/bluetooth/hci_core.c:1059 process_one_work+0x9bf/0x1710 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 The buggy address belongs to the object at ffff88807aed7000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1208 bytes inside of 2048-byte region [ffff88807aed7000, ffff88807aed7800) The buggy address belongs to the physical page: page:ffffea0001ebb400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7aed0 head:ffffea0001ebb400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000001 ffff888011842000 raw: 0000000000000000 0000000000080008 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 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3653, tgid 3653 (syz-executor.4), ts 113459266546, free_ts 113439354228 prep_new_page mm/page_alloc.c:2538 [inline] get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4287 __alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5554 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2285 alloc_slab_page mm/slub.c:1794 [inline] allocate_slab+0x213/0x300 mm/slub.c:1939 new_slab mm/slub.c:1992 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3180 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3279 slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x191/0x3e0 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc_node_track_caller+0x45/0xc0 mm/slab_common.c:975 kmalloc_reserve net/core/skbuff.c:437 [inline] __alloc_skb+0xd9/0x2f0 net/core/skbuff.c:509 alloc_skb include/linux/skbuff.h:1267 [inline] nlmsg_new include/net/netlink.h:964 [inline] inet6_ifinfo_notify+0x72/0x150 net/ipv6/addrconf.c:6047 addrconf_notify+0x4a4/0x1c10 net/ipv6/addrconf.c:3657 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945 call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] __dev_notify_flags+0x110/0x2b0 net/core/dev.c:8581 dev_change_flags+0x112/0x170 net/core/dev.c:8619 do_setlink+0x9f1/0x3bb0 net/core/rtnetlink.c:2788 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1458 [inline] free_pcp_prepare+0x65c/0xd90 mm/page_alloc.c:1508 free_unref_page_prepare mm/page_alloc.c:3386 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3482 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2586 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x62/0x80 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3398 [inline] __kmem_cache_alloc_node+0x2da/0x3e0 mm/slub.c:3437 kmalloc_trace+0x22/0x60 mm/slab_common.c:1046 kmalloc include/linux/slab.h:576 [inline] kzalloc include/linux/slab.h:712 [inline] inet_alloc_ifa net/ipv4/devinet.c:221 [inline] rtm_to_ifaddr+0x240/0xc40 net/ipv4/devinet.c:854 inet_rtm_newaddr+0x126/0x980 net/ipv4/devinet.c:942 rtnetlink_rcv_msg+0x43a/0xca0 net/core/rtnetlink.c:6091 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2540 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 __sys_sendto+0x236/0x340 net/socket.c:2117 Memory state around the buggy address: ffff88807aed7380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807aed7400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807aed7480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807aed7500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807aed7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================