================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5961 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x1333/0x3cb0 net/bluetooth/hci_event.c:6235 Read of size 1 at addr ffff88802567a40a by task kworker/u5:3/4194 CPU: 1 PID: 4194 Comm: kworker/u5:3 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: hci3 hci_rx_work Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5961 [inline] hci_le_meta_evt+0x1333/0x3cb0 net/bluetooth/hci_event.c:6235 hci_event_packet+0xe4b/0x1370 net/bluetooth/hci_event.c:6552 hci_rx_work+0x255/0xa10 net/bluetooth/hci_core.c:5190 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 7109: 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 mm/kasan/common.c:513 [inline] __kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522 kmalloc_reserve net/core/skbuff.c:356 [inline] __alloc_skb+0x22c/0x750 net/core/skbuff.c:427 alloc_skb include/linux/skbuff.h:1162 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:392 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:170 [inline] vhci_write+0xbc/0x450 drivers/bluetooth/hci_vhci.c:290 call_write_iter include/linux/fs.h:2173 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x745/0xd60 fs/read_write.c:594 ksys_write+0x152/0x260 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff88802567a000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 10 bytes to the right of 1024-byte region [ffff88802567a000, ffff88802567a400) The buggy address belongs to the page: page:ffffea0000959e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25678 head:ffffea0000959e00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 0000000100000001 ffff888016c41dc0 raw: 0000000000000000 0000000000100010 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 4198, ts 85005141880, free_ts 85002670458 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501 alloc_slab_page mm/slub.c:1780 [inline] allocate_slab mm/slub.c:1917 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1980 ___slab_alloc+0x80a/0xdd0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] __kmalloc_node+0x200/0x3b0 mm/slub.c:4456 kmalloc_node include/linux/slab.h:630 [inline] kzalloc_node include/linux/slab.h:749 [inline] qdisc_alloc+0x8d/0xb10 net/sched/sch_generic.c:891 qdisc_create_dflt+0x5f/0x430 net/sched/sch_generic.c:953 attach_one_default_qdisc net/sched/sch_generic.c:1116 [inline] netdev_for_each_tx_queue include/linux/netdevice.h:2388 [inline] attach_default_qdiscs net/sched/sch_generic.c:1134 [inline] dev_activate+0x331/0x12b0 net/sched/sch_generic.c:1193 __dev_open+0x33b/0x430 net/core/dev.c:1559 __dev_change_flags+0x20d/0x6a0 net/core/dev.c:8879 dev_change_flags+0x82/0x1a0 net/core/dev.c:8950 do_setlink+0xcdb/0x3d60 net/core/rtnetlink.c:2785 __rtnl_newlink net/core/rtnetlink.c:3456 [inline] rtnl_newlink+0x1658/0x1a50 net/core/rtnetlink.c:3578 rtnetlink_rcv_msg+0x844/0xf30 net/core/rtnetlink.c:5688 netlink_rcv_skb+0x1f5/0x440 net/netlink/af_netlink.c:2507 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x774/0x920 net/netlink/af_netlink.c:1344 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396 free_slab mm/slub.c:2020 [inline] discard_slab mm/slub.c:2026 [inline] __unfreeze_partials+0x1a5/0x200 mm/slub.c:2512 put_cpu_partial+0x12d/0x190 mm/slub.c:2592 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] slab_alloc mm/slub.c:3233 [inline] __kmalloc+0x127/0x330 mm/slub.c:4408 kmalloc include/linux/slab.h:612 [inline] kzalloc include/linux/slab.h:738 [inline] fib6_info_alloc+0x2e/0xe0 net/ipv6/ip6_fib.c:155 ip6_route_info_create+0x44f/0x1210 net/ipv6/route.c:3768 ip6_route_add+0x24/0x130 net/ipv6/route.c:3864 addrconf_add_mroute net/ipv6/addrconf.c:2510 [inline] addrconf_add_dev+0x295/0x3c0 net/ipv6/addrconf.c:2528 addrconf_dev_config net/ipv6/addrconf.c:3405 [inline] addrconf_init_auto_addrs+0x6a0/0xb00 net/ipv6/addrconf.c:3493 addrconf_notify+0xa6b/0xf00 net/ipv6/addrconf.c:3662 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:391 Memory state around the buggy address: ffff88802567a300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88802567a380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88802567a400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88802567a480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802567a500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================