Bluetooth: hci5: hardware error 0x00 ================================================================== 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 ffff88803da2a5a0 by task kworker/u9:0/26244 CPU: 1 UID: 0 PID: 26244 Comm: kworker/u9:0 Not tainted 6.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: hci5 hci_error_reset 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:408 [inline] print_report+0x16e/0x5b0 mm/kasan/report.c:521 kasan_report+0x143/0x180 mm/kasan/report.c:634 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:2044 [inline] hci_conn_hash_flush+0xff/0x240 net/bluetooth/hci_conn.c:2698 hci_dev_close_sync+0xa8b/0x1260 net/bluetooth/hci_sync.c:5197 hci_dev_do_close net/bluetooth/hci_core.c:483 [inline] hci_error_reset+0x12c/0x3f0 net/bluetooth/hci_core.c:1016 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319 worker_thread+0x870/0xd30 kernel/workqueue.c:3400 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 26242: 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] __do_kmalloc_node mm/slub.c:4294 [inline] __kmalloc_node_track_caller_noprof+0x28b/0x4c0 mm/slub.c:4313 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:537 pskb_expand_head+0x1ee/0x1440 net/core/skbuff.c:2185 netlink_trim+0x1d6/0x2e0 net/netlink/af_netlink.c:1294 netlink_broadcast_filtered+0x76/0x12a0 net/netlink/af_netlink.c:1500 nlmsg_multicast_filtered include/net/netlink.h:1128 [inline] nlmsg_multicast include/net/netlink.h:1147 [inline] nlmsg_notify+0xfb/0x1c0 net/netlink/af_netlink.c:2576 rtnl_notify net/core/rtnetlink.c:952 [inline] rtmsg_ifinfo_send net/core/rtnetlink.c:4386 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:4402 [inline] rtnetlink_event+0x21d/0x260 net/core/rtnetlink.c:6972 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2244 [inline] call_netdevice_notifiers net/core/dev.c:2258 [inline] dev_set_mac_address+0x3d9/0x510 net/core/dev.c:9520 dev_set_mac_address_user+0x31/0x50 net/core/dev.c:9534 do_setlink+0x784/0x4300 net/core/rtnetlink.c:3073 rtnl_changelink net/core/rtnetlink.c:3733 [inline] __rtnl_newlink net/core/rtnetlink.c:3885 [inline] rtnl_newlink+0x1704/0x1d30 net/core/rtnetlink.c:4022 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6912 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2533 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1882 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:733 __sys_sendto+0x363/0x4c0 net/socket.c:2187 __do_sys_sendto net/socket.c:2194 [inline] __se_sys_sendto net/socket.c:2190 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2190 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 26242: 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:576 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:2353 [inline] slab_free mm/slub.c:4609 [inline] kfree+0x196/0x430 mm/slub.c:4757 skb_kfree_head net/core/skbuff.c:996 [inline] skb_free_head net/core/skbuff.c:1008 [inline] skb_release_data+0x6a0/0x8a0 net/core/skbuff.c:1035 skb_release_all net/core/skbuff.c:1100 [inline] __kfree_skb net/core/skbuff.c:1114 [inline] consume_skb+0x9f/0xf0 net/core/skbuff.c:1346 netlink_broadcast_filtered+0x116d/0x12a0 net/netlink/af_netlink.c:1523 nlmsg_multicast_filtered include/net/netlink.h:1128 [inline] nlmsg_multicast include/net/netlink.h:1147 [inline] nlmsg_notify+0xfb/0x1c0 net/netlink/af_netlink.c:2576 rtnl_notify net/core/rtnetlink.c:952 [inline] rtmsg_ifinfo_send net/core/rtnetlink.c:4386 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:4402 [inline] rtnetlink_event+0x21d/0x260 net/core/rtnetlink.c:6972 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2244 [inline] call_netdevice_notifiers net/core/dev.c:2258 [inline] dev_set_mac_address+0x3d9/0x510 net/core/dev.c:9520 dev_set_mac_address_user+0x31/0x50 net/core/dev.c:9534 do_setlink+0x784/0x4300 net/core/rtnetlink.c:3073 rtnl_changelink net/core/rtnetlink.c:3733 [inline] __rtnl_newlink net/core/rtnetlink.c:3885 [inline] rtnl_newlink+0x1704/0x1d30 net/core/rtnetlink.c:4022 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6912 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2533 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1882 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:733 __sys_sendto+0x363/0x4c0 net/socket.c:2187 __do_sys_sendto net/socket.c:2194 [inline] __se_sys_sendto net/socket.c:2190 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2190 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 The buggy address belongs to the object at ffff88803da2a000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1440 bytes inside of freed 2048-byte region [ffff88803da2a000, ffff88803da2a800) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88803da2f000 pfn:0x3da28 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000240 ffff88801b042000 ffffea0000af2810 ffffea0000ec9810 raw: ffff88803da2f000 0000000000080003 00000000f5000000 0000000000000000 head: 00fff00000000240 ffff88801b042000 ffffea0000af2810 ffffea0000ec9810 head: ffff88803da2f000 0000000000080003 00000000f5000000 0000000000000000 head: 00fff00000000003 ffffea0000f68a01 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 17757, tgid 17756 (syz.4.3270), ts 1575370160344, free_ts 1561259705167 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4740 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2587 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] __kmalloc_cache_noprof+0x27b/0x390 mm/slub.c:4320 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] br_vlan_add+0x208/0x970 net/bridge/br_vlan.c:786 __vlan_add+0x4a6/0x26d0 net/bridge/br_vlan.c:292 nbp_vlan_add+0x265/0x3a0 net/bridge/br_vlan.c:1339 br_vlan_info+0x126/0x510 net/bridge/br_netlink.c:705 br_process_vlan_info+0x807/0xbc0 net/bridge/br_netlink.c:768 br_afspec+0x3ce/0x640 net/bridge/br_netlink.c:836 br_setlink+0x31d/0x8b0 net/bridge/br_netlink.c:1135 rtnl_bridge_setlink+0x667/0x9d0 net/core/rtnetlink.c:5487 page last free pid 16715 tgid 16715 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_folios+0xe2f/0x18a0 mm/page_alloc.c:2707 folios_put_refs+0x76c/0x860 mm/swap.c:994 folio_batch_release include/linux/pagevec.h:101 [inline] truncate_inode_pages_range+0x460/0x10e0 mm/truncate.c:330 evict+0x4fd/0x9a0 fs/inode.c:798 __dentry_kill+0x20d/0x630 fs/dcache.c:643 shrink_kill+0xa9/0x2c0 fs/dcache.c:1088 shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1115 shrink_dcache_parent+0xcb/0x3b0 do_one_tree+0x23/0xe0 fs/dcache.c:1578 shrink_dcache_for_umount+0xb4/0x180 fs/dcache.c:1595 generic_shutdown_super+0x6a/0x2d0 fs/super.c:620 kill_anon_super fs/super.c:1237 [inline] kill_litter_super+0x76/0xb0 fs/super.c:1247 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1413 task_work_run+0x24f/0x310 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 Memory state around the buggy address: ffff88803da2a480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88803da2a500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88803da2a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88803da2a600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88803da2a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================