================================================================== BUG: KASAN: slab-use-after-free in sco_conn_free net/bluetooth/sco.c:87 [inline] BUG: KASAN: slab-use-after-free in kref_put include/linux/kref.h:65 [inline] BUG: KASAN: slab-use-after-free in sco_conn_put+0xad/0x210 net/bluetooth/sco.c:107 Write of size 8 at addr ffff88807d9885a0 by task syz-executor/5842 CPU: 1 UID: 0 PID: 5842 Comm: syz-executor Not tainted 6.13.0-rc2-syzkaller-00146-g922b4b955a03 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 sco_conn_free net/bluetooth/sco.c:87 [inline] kref_put include/linux/kref.h:65 [inline] sco_conn_put+0xad/0x210 net/bluetooth/sco.c:107 hci_disconn_cfm include/net/bluetooth/hci_core.h:2075 [inline] hci_conn_hash_flush+0x1be/0x350 net/bluetooth/hci_conn.c:2698 hci_dev_close_sync+0xa42/0x11c0 net/bluetooth/hci_sync.c:5212 hci_dev_do_close net/bluetooth/hci_core.c:482 [inline] hci_unregister_dev+0x20b/0x510 net/bluetooth/hci_core.c:2697 vhci_release+0x80/0xd0 drivers/bluetooth/hci_vhci.c:664 __fput+0x23c/0xa50 fs/file_table.c:450 task_work_run+0x24f/0x310 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xa2f/0x28e0 kernel/exit.c:938 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 __do_sys_exit_group kernel/exit.c:1098 [inline] __se_sys_exit_group kernel/exit.c:1096 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f05c7b85d19 Code: Unable to access opcode bytes at 0x7f05c7b85cef. RSP: 002b:00007ffcbf811618 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f05c7b85d19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043 RBP: 00007f05c7be3ad8 R08: 00007ffcbf80f3b7 R09: 000000000003841d R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 000000000003841d R14: 0000000000000000 R15: 000000000000013e Allocated by task 9646: 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:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_node_noprof+0x25d/0x3a0 mm/slub.c:4326 kmalloc_node_noprof include/linux/slab.h:924 [inline] page_pool_create_percpu+0x77/0xa00 net/core/page_pool.c:335 nsim_create_page_pool drivers/net/netdevsim/netdev.c:374 [inline] nsim_init_napi drivers/net/netdevsim/netdev.c:399 [inline] nsim_open+0x38c/0x880 drivers/net/netdevsim/netdev.c:436 __dev_open+0x2d3/0x450 net/core/dev.c:1476 __dev_change_flags+0x1e2/0x6f0 net/core/dev.c:8949 dev_change_flags+0x8b/0x1a0 net/core/dev.c:9021 do_setlink+0xc90/0x4210 net/core/rtnetlink.c:3109 rtnl_changelink net/core/rtnetlink.c:3723 [inline] __rtnl_newlink net/core/rtnetlink.c:3874 [inline] rtnl_newlink+0x1519/0x2150 net/core/rtnetlink.c:4011 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6921 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2542 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:726 __sys_sendto+0x363/0x4c0 net/socket.c:2197 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 9880: 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:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2338 [inline] slab_free mm/slub.c:4598 [inline] kfree+0x196/0x430 mm/slub.c:4746 __page_pool_destroy net/core/page_pool.c:1018 [inline] page_pool_release+0x827/0x8b0 net/core/page_pool.c:1056 page_pool_destroy+0x2e3/0x560 net/core/page_pool.c:1126 nsim_del_napi drivers/net/netdevsim/netdev.c:459 [inline] nsim_stop+0x253/0x320 drivers/net/netdevsim/netdev.c:474 __dev_close_many+0x219/0x300 net/core/dev.c:1560 dev_close_many+0x24e/0x4c0 net/core/dev.c:1585 unregister_netdevice_many_notify+0x530/0x1da0 net/core/dev.c:11500 unregister_netdevice_many net/core/dev.c:11590 [inline] unregister_netdevice_queue+0x303/0x370 net/core/dev.c:11462 unregister_netdevice include/linux/netdevice.h:3192 [inline] nsim_destroy+0x180/0x5c0 drivers/net/netdevsim/netdev.c:821 __nsim_dev_port_del+0x14b/0x1b0 drivers/net/netdevsim/dev.c:1428 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1440 [inline] nsim_dev_reload_destroy+0x28a/0x490 drivers/net/netdevsim/dev.c:1661 nsim_dev_reload_down+0x98/0xd0 drivers/net/netdevsim/dev.c:968 devlink_reload+0x18b/0x870 net/devlink/dev.c:461 devlink_pernet_pre_exit+0x1f3/0x440 net/devlink/core.c:509 ops_pre_exit_list net/core/net_namespace.c:162 [inline] cleanup_net+0x615/0xd50 net/core/net_namespace.c:628 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 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 ffff88807d988000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1440 bytes inside of freed 2048-byte region [ffff88807d988000, ffff88807d988800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d988 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: f5(slab) raw: 00fff00000000040 ffff88801ac42000 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff88801ac42000 dead000000000100 dead000000000122 head: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea0001f66201 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 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 11, tgid 11 (kworker/u8:0), ts 148080105988, free_ts 148028574086 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3474 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269 alloc_slab_page+0x6a/0x110 mm/slub.c:2408 allocate_slab+0x5a/0x2b0 mm/slub.c:2574 new_slab mm/slub.c:2627 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3815 __slab_alloc+0x58/0xa0 mm/slub.c:3905 __slab_alloc_node mm/slub.c:3980 [inline] slab_alloc_node mm/slub.c:4141 [inline] __do_kmalloc_node mm/slub.c:4282 [inline] __kmalloc_node_track_caller_noprof+0x2e9/0x4c0 mm/slub.c:4302 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:609 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1323 [inline] nlmsg_new include/net/netlink.h:1018 [inline] inet6_ifinfo_notify+0x72/0x120 net/ipv6/addrconf.c:6178 addrconf_notify+0xc6b/0x1020 net/ipv6/addrconf.c:3784 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85 netdev_state_change+0x11f/0x1a0 net/core/dev.c:1378 linkwatch_do_dev+0x112/0x170 net/core/link_watch.c:182 page last free pid 8167 tgid 8167 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0xd3f/0x1010 mm/page_alloc.c:2657 discard_slab mm/slub.c:2673 [inline] __put_partials+0x160/0x1c0 mm/slub.c:3142 put_cpu_partial+0x17c/0x250 mm/slub.c:3217 __slab_free+0x290/0x380 mm/slub.c:4468 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/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:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] kmem_cache_alloc_lru_noprof+0x1dd/0x390 mm/slub.c:4172 sock_alloc_inode+0x28/0xc0 net/socket.c:307 alloc_inode+0x65/0x1a0 fs/inode.c:336 sock_alloc net/socket.c:615 [inline] __sock_create+0x127/0xa30 net/socket.c:1522 sock_create net/socket.c:1616 [inline] __sys_socket_create net/socket.c:1653 [inline] __sys_socket+0x150/0x3c0 net/socket.c:1700 __do_sys_socket net/socket.c:1714 [inline] __se_sys_socket net/socket.c:1712 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1712 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88807d988480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807d988500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807d988580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807d988600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807d988680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================