Bluetooth: hci1: command 0x0406 tx timeout Bluetooth: hci1: link tx timeout Bluetooth: hci1: killing stalled connection 10:aa:aa:aa:aa:aa ================================================================== BUG: KASAN: slab-use-after-free in hci_disconnect+0x208/0x2d0 net/bluetooth/hci_conn.c:190 Read of size 1 at addr ffff88802663c03b by task kworker/u9:0/53 CPU: 1 PID: 53 Comm: kworker/u9:0 Not tainted 6.9.0-next-20240523-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: hci1 hci_tx_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 hci_disconnect+0x208/0x2d0 net/bluetooth/hci_conn.c:190 hci_link_tx_to net/bluetooth/hci_core.c:3467 [inline] __check_timeout+0x3a8/0x560 net/bluetooth/hci_core.c:3608 hci_sched_acl_pkt net/bluetooth/hci_core.c:3666 [inline] hci_sched_acl net/bluetooth/hci_core.c:3709 [inline] hci_tx_work+0x565/0x1590 net/bluetooth/hci_core.c:3802 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 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 Allocated by task 5123: 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:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] kmalloc_trace_noprof+0x19c/0x2c0 mm/slub.c:4152 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] hci_conn_add+0x2f9/0x1850 net/bluetooth/hci_conn.c:935 hci_conn_request_evt+0x5e8/0xdb0 net/bluetooth/hci_event.c:3288 hci_event_func net/bluetooth/hci_event.c:7424 [inline] hci_event_packet+0xac0/0x1540 net/bluetooth/hci_event.c:7476 hci_rx_work+0x3e8/0xca0 net/bluetooth/hci_core.c:4071 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 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 Freed by task 5123: 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:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2195 [inline] slab_free mm/slub.c:4436 [inline] kfree+0x149/0x360 mm/slub.c:4557 device_release+0x99/0x1c0 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x22f/0x480 lib/kobject.c:737 hci_conn_cleanup net/bluetooth/hci_conn.c:176 [inline] hci_conn_del+0x8c4/0xc40 net/bluetooth/hci_conn.c:1154 hci_abort_conn_sync+0x583/0xde0 net/bluetooth/hci_sync.c:5450 hci_cmd_sync_work+0x22b/0x400 net/bluetooth/hci_sync.c:310 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 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 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 insert_work+0x3e/0x330 kernel/workqueue.c:2208 __queue_work+0xaf2/0xee0 kernel/workqueue.c:2364 queue_delayed_work_on+0x1ca/0x390 kernel/workqueue.c:2573 l2cap_chan_del+0x291/0x5d0 net/bluetooth/l2cap_core.c:674 l2cap_conn_del+0x388/0x680 net/bluetooth/l2cap_core.c:1785 l2cap_connect_cfm+0x11f/0x1220 net/bluetooth/l2cap_core.c:7237 hci_connect_cfm include/net/bluetooth/hci_core.h:1970 [inline] hci_conn_failed+0x1f6/0x340 net/bluetooth/hci_conn.c:1257 hci_abort_conn_sync+0x583/0xde0 net/bluetooth/hci_sync.c:5450 hci_cmd_sync_work+0x22b/0x400 net/bluetooth/hci_sync.c:310 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 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 ffff88802663c000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 59 bytes inside of freed 8192-byte region [ffff88802663c000, ffff88802663e000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x26638 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 ksm flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff888015042280 ffffea0000b2be00 0000000000000003 raw: 0000000000000000 0000000000020002 00000001ffffefff 0000000000000000 head: 00fff00000000040 ffff888015042280 ffffea0000b2be00 0000000000000003 head: 0000000000000000 0000000000020002 00000001ffffefff 0000000000000000 head: 00fff00000000003 ffffea0000998e01 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5259, tgid 5259 (syz-executor.0), ts 78031832975, free_ts 77922614563 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x2ce2/0x2d90 mm/page_alloc.c:3438 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4696 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2264 allocate_slab+0x5a/0x2e0 mm/slub.c:2427 new_slab mm/slub.c:2480 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3666 __slab_alloc+0x58/0xa0 mm/slub.c:3756 __slab_alloc_node mm/slub.c:3809 [inline] slab_alloc_node mm/slub.c:3988 [inline] __do_kmalloc_node mm/slub.c:4120 [inline] __kmalloc_node_noprof+0x286/0x440 mm/slub.c:4128 kmalloc_node_noprof include/linux/slab.h:681 [inline] kvmalloc_node_noprof+0x72/0x190 mm/util.c:634 kvmalloc_array_node_noprof include/linux/slab.h:800 [inline] __ptr_ring_init_queue_alloc_noprof include/linux/ptr_ring.h:471 [inline] ptr_ring_init_noprof include/linux/ptr_ring.h:489 [inline] skb_array_init_noprof include/linux/skb_array.h:182 [inline] pfifo_fast_init+0x389/0x6e0 net/sched/sch_generic.c:863 qdisc_create_dflt+0x136/0x4b0 net/sched/sch_generic.c:1013 attach_one_default_qdisc net/sched/sch_generic.c:1172 [inline] netdev_for_each_tx_queue include/linux/netdevice.h:2504 [inline] attach_default_qdiscs net/sched/sch_generic.c:1190 [inline] dev_activate+0x3c0/0x1240 net/sched/sch_generic.c:1249 __dev_open+0x352/0x450 net/core/dev.c:1481 __dev_change_flags+0x1e2/0x6f0 net/core/dev.c:8780 dev_change_flags+0x8b/0x1a0 net/core/dev.c:8852 do_setlink+0xccd/0x41f0 net/core/rtnetlink.c:2900 page last free pid 5259 tgid 5259 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2601 discard_slab mm/slub.c:2526 [inline] __put_partials+0xeb/0x130 mm/slub.c:2994 put_cpu_partial+0x17c/0x250 mm/slub.c:3069 __slab_free+0x2ea/0x3d0 mm/slub.c:4306 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/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:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3940 [inline] slab_alloc_node mm/slub.c:4000 [inline] __do_kmalloc_node mm/slub.c:4120 [inline] __kmalloc_noprof+0x1a3/0x400 mm/slub.c:4134 kmalloc_noprof include/linux/slab.h:664 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] fib6_info_alloc+0x2e/0xf0 net/ipv6/ip6_fib.c:155 ip6_route_info_create+0x445/0x12b0 net/ipv6/route.c:3759 ip6_route_add+0x28/0x160 net/ipv6/route.c:3851 addrconf_prefix_route+0x314/0x4e0 net/ipv6/addrconf.c:2485 inet6_addr_add+0x627/0xb00 net/ipv6/addrconf.c:3062 inet6_rtm_newaddr+0x8a3/0xc80 net/ipv6/addrconf.c:5047 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2564 Memory state around the buggy address: ffff88802663bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802663bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88802663c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802663c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802663c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================