================================================================== BUG: KASAN: slab-out-of-bounds in hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5933 [inline] BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0xdd0/0x31c0 net/bluetooth/hci_event.c:6207 Read of size 1 at addr ffff0000e878ae02 by task kworker/u5:4/4045 CPU: 0 PID: 4045 Comm: kworker/u5:4 Not tainted 5.15.180-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: hci2 hci_rx_work Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x174/0x1e4 mm/kasan/report.c:451 __asan_report_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306 hci_le_ext_adv_report_evt net/bluetooth/hci_event.c:5933 [inline] hci_le_meta_evt+0xdd0/0x31c0 net/bluetooth/hci_event.c:6207 hci_event_packet+0xd34/0x12b4 net/bluetooth/hci_event.c:6524 hci_rx_work+0x1d0/0x830 net/bluetooth/hci_core.c:5160 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 Allocated by task 10223: 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+0xbc/0xfc mm/kasan/common.c:513 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc_node_track_caller+0x234/0x448 mm/slub.c:4963 kmalloc_reserve+0xe8/0x270 net/core/skbuff.c:356 __alloc_skb+0x1a4/0x584 net/core/skbuff.c:427 alloc_skb include/linux/skbuff.h:1162 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:391 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:170 [inline] vhci_write+0xb8/0x3b8 drivers/bluetooth/hci_vhci.c:290 call_write_iter include/linux/fs.h:2172 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x884/0xb44 fs/read_write.c:594 ksys_write+0x15c/0x26c fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:656 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Last potentially related work creation: kasan_save_stack+0x38/0x68 mm/kasan/common.c:38 kasan_record_aux_stack+0xd4/0x11c mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3007 [inline] call_rcu+0x118/0xb40 kernel/rcu/tree.c:3087 fib6_info_release include/net/ip6_fib.h:339 [inline] fib6_del_route net/ipv6/ip6_fib.c:1998 [inline] fib6_del+0xdc0/0x1234 net/ipv6/ip6_fib.c:2031 fib6_clean_node+0x24c/0x4d0 net/ipv6/ip6_fib.c:2193 fib6_walk_continue+0x5b8/0x7e0 net/ipv6/ip6_fib.c:2115 fib6_walk+0x144/0x258 net/ipv6/ip6_fib.c:2163 fib6_clean_tree net/ipv6/ip6_fib.c:2243 [inline] __fib6_clean_all+0x2a4/0x428 net/ipv6/ip6_fib.c:2259 fib6_clean_all+0x3c/0x50 net/ipv6/ip6_fib.c:2270 rt6_sync_down_dev net/ipv6/route.c:4915 [inline] rt6_disable_ip+0x134/0x6b0 net/ipv6/route.c:4920 addrconf_ifdown+0x154/0x1834 net/ipv6/addrconf.c:3778 addrconf_notify+0x36c/0xc78 net/ipv6/addrconf.c:-1 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:2049 [inline] call_netdevice_notifiers_extack net/core/dev.c:2061 [inline] call_netdevice_notifiers net/core/dev.c:2075 [inline] dev_close_many+0x300/0x46c net/core/dev.c:1650 unregister_netdevice_many+0x408/0x18a8 net/core/dev.c:11109 default_device_exit_batch+0x4c0/0x520 net/core/dev.c:11666 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x6bc/0xa9c net/core/net_namespace.c:618 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870 The buggy address belongs to the object at ffff0000e878ac00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 2 bytes to the right of 512-byte region [ffff0000e878ac00, ffff0000e878ae00) The buggy address belongs to the page: page:00000000a2b15676 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x128788 head:00000000a2b15676 order:2 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 dead000000000100 dead000000000122 ffff0000c0002600 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e878ad00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000e878ad80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000e878ae00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000e878ae80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000e878af00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================