Bluetooth: hci1: HCI_REQ-0x0c1a ================================================================== BUG: KASAN: use-after-free in __list_add_valid+0xa5/0xb0 lib/list_debug.c:30 Read of size 8 at addr ffff8880175365c8 by task syz-executor.2/13229 CPU: 1 PID: 13229 Comm: syz-executor.2 Not tainted 6.0.0-syzkaller-02770-g79d878f7ad8e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 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 __list_add_valid+0xa5/0xb0 lib/list_debug.c:30 __list_add include/linux/list.h:69 [inline] list_add_tail include/linux/list.h:102 [inline] register_shrinker_prepared+0x37/0x120 mm/vmscan.c:684 sget_fc+0x5e7/0x7c0 fs/super.c:581 vfs_get_super fs/super.c:1163 [inline] get_tree_nodev+0x24/0x1d0 fs/super.c:1198 mqueue_get_tree+0xee/0x130 ipc/mqueue.c:435 vfs_get_tree+0x89/0x2f0 fs/super.c:1530 fc_mount+0x13/0xc0 fs/namespace.c:1043 mq_create_mount ipc/mqueue.c:485 [inline] mq_init_ns+0x43e/0x630 ipc/mqueue.c:1701 create_ipc_ns ipc/namespace.c:58 [inline] copy_ipcs+0x35e/0x5e0 ipc/namespace.c:94 create_new_namespaces+0x210/0xb20 kernel/nsproxy.c:90 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x920 kernel/fork.c:3181 __do_sys_unshare kernel/fork.c:3252 [inline] __se_sys_unshare kernel/fork.c:3250 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3250 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7efc2048cb67 Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd6fc5d898 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007ffd6fc5df08 RCX: 00007efc2048cb67 RDX: 0000000000000000 RSI: 00007efc204fe45c RDI: 0000000008000000 RBP: 00007ffd6fc5d8a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000044000 R11: 0000000000000246 R12: 0000000000000003 R13: 00007ffd6fc5d9a0 R14: 00007efc205ac9d8 R15: 000000000000000c Allocated by task 13150: 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:605 [inline] kzalloc include/linux/slab.h:733 [inline] ops_init+0xfb/0x470 net/core/net_namespace.c:124 setup_net+0x5d1/0xc50 net/core/net_namespace.c:325 copy_net_ns+0x318/0x760 net/core/net_namespace.c:471 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x391/0x450 kernel/nsproxy.c:178 copy_process+0x304d/0x7090 kernel/fork.c:2257 kernel_clone+0xe7/0xab0 kernel/fork.c:2671 __do_sys_clone+0xba/0x100 kernel/fork.c:2805 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 13150: 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:1759 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1785 slab_free mm/slub.c:3539 [inline] kfree+0xe2/0x580 mm/slub.c:4567 ops_init+0xcd/0x470 net/core/net_namespace.c:139 setup_net+0x5d1/0xc50 net/core/net_namespace.c:325 copy_net_ns+0x318/0x760 net/core/net_namespace.c:471 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x391/0x450 kernel/nsproxy.c:178 copy_process+0x304d/0x7090 kernel/fork.c:2257 kernel_clone+0xe7/0xab0 kernel/fork.c:2671 __do_sys_clone+0xba/0x100 kernel/fork.c:2805 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd 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 net/socket.c:650 [inline] sock_release+0x87/0x1b0 net/socket.c:678 netlink_kernel_release+0x4b/0x60 net/netlink/af_netlink.c:2107 rtnetlink_net_exit+0x34/0x70 net/core/rtnetlink.c:6176 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:162 setup_net+0x7fb/0xc50 net/core/net_namespace.c:348 copy_net_ns+0x318/0x760 net/core/net_namespace.c:471 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x391/0x450 kernel/nsproxy.c:178 copy_process+0x304d/0x7090 kernel/fork.c:2257 kernel_clone+0xe7/0xab0 kernel/fork.c:2671 __do_sys_clone+0xba/0x100 kernel/fork.c:2805 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 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 net/socket.c:650 [inline] sock_release+0x87/0x1b0 net/socket.c:678 netlink_kernel_release+0x4b/0x60 net/netlink/af_netlink.c:2107 rdma_dev_exit_net+0x32e/0x550 drivers/infiniband/core/device.c:1152 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:162 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594 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 The buggy address belongs to the object at ffff888017536000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1480 bytes inside of 2048-byte region [ffff888017536000, ffff888017536800) The buggy address belongs to the physical page: page:ffffea00005d4c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17530 head:ffffea00005d4c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001270a00 dead000000000002 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 2476636299, free_ts 0 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549 alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2103 alloc_pages+0x22f/0x270 mm/mempolicy.c:2265 alloc_slab_page mm/slub.c:1829 [inline] allocate_slab+0x27e/0x3d0 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x84f/0xe80 mm/slub.c:3036 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3123 slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3256 [inline] kmem_cache_alloc_trace+0x323/0x3e0 mm/slub.c:3287 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] acpi_os_allocate_zeroed include/acpi/platform/aclinuxex.h:57 [inline] acpi_ds_create_walk_state+0x88/0x1ff drivers/acpi/acpica/dswstate.c:518 acpi_ds_auto_serialize_method+0xee/0x1fc drivers/acpi/acpica/dsmethod.c:81 acpi_ds_init_one_object drivers/acpi/acpica/dsinit.c:110 [inline] acpi_ds_init_one_object+0x2a1/0x3c3 drivers/acpi/acpica/dsinit.c:46 acpi_ns_walk_namespace+0x24c/0x42e drivers/acpi/acpica/nswalk.c:240 acpi_ds_initialize_objects+0xdc/0x170 drivers/acpi/acpica/dsinit.c:189 acpi_ns_load_table+0x91/0x116 drivers/acpi/acpica/nsload.c:106 acpi_tb_load_namespace+0x2e6/0x5bb drivers/acpi/acpica/tbxfload.c:158 acpi_load_tables+0x4c/0xfb drivers/acpi/acpica/tbxfload.c:59 page_owner free stack trace missing Memory state around the buggy address: ffff888017536480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888017536500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888017536580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888017536600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888017536680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================