================================================================== BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline] BUG: KASAN: use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:111 [inline] BUG: KASAN: use-after-free in __refcount_add include/linux/refcount.h:193 [inline] BUG: KASAN: use-after-free in __refcount_inc include/linux/refcount.h:250 [inline] BUG: KASAN: use-after-free in refcount_inc include/linux/refcount.h:267 [inline] BUG: KASAN: use-after-free in sock_hold include/net/sock.h:708 [inline] BUG: KASAN: use-after-free in sco_conn_del+0xac/0x2f0 net/bluetooth/sco.c:193 Write of size 4 at addr ffff88807ac52080 by task syz-executor.0/27425 CPU: 1 PID: 27425 Comm: syz-executor.0 Not tainted 5.16.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 print_address_description+0x65/0x380 mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [inline] kasan_report+0x19a/0x1f0 mm/kasan/report.c:450 kasan_check_range+0x2b5/0x2f0 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:111 [inline] __refcount_add include/linux/refcount.h:193 [inline] __refcount_inc include/linux/refcount.h:250 [inline] refcount_inc include/linux/refcount.h:267 [inline] sock_hold include/net/sock.h:708 [inline] sco_conn_del+0xac/0x2f0 net/bluetooth/sco.c:193 hci_disconn_cfm include/net/bluetooth/hci_core.h:1543 [inline] hci_conn_hash_flush+0x112/0x240 net/bluetooth/hci_conn.c:1742 hci_dev_do_close+0x93e/0xee0 net/bluetooth/hci_core.c:1672 hci_rfkill_set_block+0x10f/0x180 net/bluetooth/hci_core.c:2113 rfkill_set_block+0x1f1/0x440 net/rfkill/core.c:344 rfkill_fop_write+0x5a4/0x760 net/rfkill/core.c:1268 vfs_write+0x327/0xe90 fs/read_write.c:588 ksys_write+0x18f/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f239741be99 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2395d91168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f239752ef60 RCX: 00007f239741be99 RDX: 0000000000000008 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007f2397475ff1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd4112251f R14: 00007f2395d91300 R15: 0000000000022000 Allocated by task 26091: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:513 kasan_kmalloc include/linux/kasan.h:269 [inline] __kmalloc+0x253/0x380 mm/slub.c:4423 kmalloc include/linux/slab.h:595 [inline] sk_prot_alloc+0xf4/0x230 net/core/sock.c:1920 sk_alloc+0x35/0x300 net/core/sock.c:1973 sco_sock_alloc net/bluetooth/sco.c:483 [inline] sco_sock_create+0xb0/0x450 net/bluetooth/sco.c:522 bt_sock_create+0x15b/0x220 net/bluetooth/af_bluetooth.c:130 __sock_create+0x580/0x8d0 net/socket.c:1464 sock_create net/socket.c:1515 [inline] __sys_socket+0x133/0x380 net/socket.c:1557 __do_sys_socket net/socket.c:1566 [inline] __se_sys_socket net/socket.c:1564 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1564 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 26114: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x10d/0x150 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1749 slab_free mm/slub.c:3513 [inline] kfree+0xe1/0x330 mm/slub.c:4561 sk_prot_free net/core/sock.c:1956 [inline] __sk_destruct+0x434/0x5c0 net/core/sock.c:2042 sco_sock_release+0x24c/0x330 net/bluetooth/sco.c:1259 __sock_release net/socket.c:649 [inline] sock_close+0xd8/0x260 net/socket.c:1314 __fput+0x3fc/0x870 fs/file_table.c:280 task_work_run+0x146/0x1c0 kernel/task_work.c:164 get_signal+0x2078/0x2120 kernel/signal.c:2624 arch_do_signal_or_restart+0x9c/0x730 arch/x86/kernel/signal.c:868 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x191/0x220 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300 do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xfa/0x130 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:2985 [inline] call_rcu+0x1c4/0xa70 kernel/rcu/tree.c:3065 netlink_release+0x132d/0x1790 net/netlink/af_netlink.c:815 __sock_release net/socket.c:649 [inline] sock_close+0xd8/0x260 net/socket.c:1314 __fput+0x3fc/0x870 fs/file_table.c:280 task_work_run+0x146/0x1c0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x209/0x220 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300 do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xfa/0x130 mm/kasan/generic.c:348 insert_work+0x54/0x400 kernel/workqueue.c:1354 __queue_work+0x928/0xc60 kernel/workqueue.c:1520 queue_work_on+0x12b/0x220 kernel/workqueue.c:1547 queue_work include/linux/workqueue.h:502 [inline] rpm_suspend+0x116c/0x1a60 drivers/base/power/runtime.c:634 __pm_runtime_idle+0x10a/0x140 drivers/base/power/runtime.c:1046 pm_runtime_put include/linux/pm_runtime.h:426 [inline] unlink_peers drivers/usb/core/port.c:437 [inline] usb_hub_remove_port_device+0x1a5/0x2c0 drivers/usb/core/port.c:621 hub_disconnect+0x171/0x480 drivers/usb/core/hub.c:1734 usb_unbind_interface+0x1f2/0x860 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1205 [inline] device_release_driver_internal+0x523/0x7b0 drivers/base/dd.c:1236 proc_disconnect_claim+0x2f1/0x3c0 drivers/usb/core/devio.c:2464 usbdev_do_ioctl drivers/usb/core/devio.c:2747 [inline] usbdev_ioctl+0x14b6/0x6d00 drivers/usb/core/devio.c:2791 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff88807ac52000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of 2048-byte region [ffff88807ac52000, ffff88807ac52800) The buggy address belongs to the page: page:ffffea0001eb1400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ac50 head:ffffea0001eb1400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001ecc600 dead000000000002 ffff888011442000 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3633, ts 141920819981, free_ts 136200177163 prep_new_page mm/page_alloc.c:2418 [inline] get_page_from_freelist+0x729/0x9e0 mm/page_alloc.c:4149 __alloc_pages+0x255/0x580 mm/page_alloc.c:5369 alloc_slab_page mm/slub.c:1793 [inline] allocate_slab+0xcc/0x540 mm/slub.c:1930 new_slab mm/slub.c:1993 [inline] ___slab_alloc+0x41e/0xc40 mm/slub.c:3022 __slab_alloc mm/slub.c:3109 [inline] slab_alloc_node mm/slub.c:3200 [inline] slab_alloc mm/slub.c:3242 [inline] __kmalloc_track_caller+0x2d4/0x370 mm/slub.c:4925 kmemdup+0x21/0x50 mm/util.c:128 neigh_sysctl_register+0xb2/0x680 net/core/neighbour.c:3725 devinet_sysctl_register+0x9d/0x1a0 net/ipv4/devinet.c:2618 inetdev_init+0x27f/0x4a0 net/ipv4/devinet.c:278 inetdev_event+0x1c5/0x1410 net/ipv4/devinet.c:1532 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2002 [inline] call_netdevice_notifiers_extack net/core/dev.c:2014 [inline] call_netdevice_notifiers net/core/dev.c:2028 [inline] register_netdevice+0x15fd/0x1c00 net/core/dev.c:10367 wg_newlink+0x4a5/0x740 drivers/net/wireguard/device.c:354 __rtnl_newlink net/core/rtnetlink.c:3458 [inline] rtnl_newlink+0x14b3/0x1d10 net/core/rtnetlink.c:3506 rtnetlink_rcv_msg+0x934/0xe60 net/core/rtnetlink.c:5571 netlink_rcv_skb+0x200/0x470 net/netlink/af_netlink.c:2496 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] free_pcp_prepare+0xd1c/0xe00 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3309 [inline] free_unref_page+0x7d/0x580 mm/page_alloc.c:3388 free_slab mm/slub.c:2033 [inline] discard_slab mm/slub.c:2039 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2527 put_cpu_partial+0x116/0x180 mm/slub.c:2603 do_slab_free mm/slub.c:3501 [inline] ___cache_free+0xe6/0x120 mm/slub.c:3520 qlist_free_all mm/kasan/quarantine.c:165 [inline] kasan_quarantine_reduce+0x151/0x1c0 mm/kasan/quarantine.c:272 __kasan_slab_alloc+0x2f/0xf0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:259 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc_node mm/slub.c:3234 [inline] kmem_cache_alloc_node+0x201/0x370 mm/slub.c:3270 __alloc_skb+0xd8/0x5a0 net/core/skbuff.c:414 alloc_skb_fclone include/linux/skbuff.h:1177 [inline] tcp_stream_alloc_skb+0x67/0x850 net/ipv4/tcp.c:861 tcp_sendmsg_locked+0xdb7/0x48a0 net/ipv4/tcp.c:1281 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1440 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] sock_write_iter+0x37c/0x4e0 net/socket.c:1057 call_write_iter include/linux/fs.h:2162 [inline] new_sync_write fs/read_write.c:503 [inline] vfs_write+0xb11/0xe90 fs/read_write.c:590 ksys_write+0x18f/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 Memory state around the buggy address: ffff88807ac51f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807ac52000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807ac52080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807ac52100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807ac52180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================