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BUG: KASAN: global-out-of-bounds in fib6_clean_node+0x2b4/0x49c net/ipv6/ip6_fib.c:2198
Read of size 8 at addr ffff8000974c08a8 by task syz.6.1997/13691

CPU: 0 UID: 0 PID: 13691 Comm: syz.6.1997 Not tainted 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_address_description+0xa8/0x254 mm/kasan/report.c:408
 print_report+0x68/0x84 mm/kasan/report.c:521
 kasan_report+0xb0/0x110 mm/kasan/report.c:634
 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381
 fib6_clean_node+0x2b4/0x49c net/ipv6/ip6_fib.c:2198
 fib6_walk_continue+0x654/0x878 net/ipv6/ip6_fib.c:2124
 fib6_walk+0x140/0x254 net/ipv6/ip6_fib.c:2172
 fib6_clean_tree net/ipv6/ip6_fib.c:2252 [inline]
 __fib6_clean_all+0x1dc/0x310 net/ipv6/ip6_fib.c:2268
 fib6_clean_all+0x3c/0x50 net/ipv6/ip6_fib.c:2279
 rt6_sync_up+0x118/0x15c net/ipv6/route.c:4837
 addrconf_notify+0xa64/0xcdc net/ipv6/addrconf.c:3732
 notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85
 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
 call_netdevice_notifiers_info net/core/dev.c:2176 [inline]
 __dev_notify_flags+0x348/0x47c net/core/dev.c:9407
 netif_change_flags+0xd0/0x15c net/core/dev.c:9422
 do_setlink+0xaa8/0x3860 net/core/rtnetlink.c:3152
 rtnl_changelink net/core/rtnetlink.c:3769 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
 rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4065
 rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6955
 netlink_rcv_skb+0x230/0x414 net/netlink/af_netlink.c:2534
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6982
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x60c/0x824 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x648/0x930 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg net/socket.c:727 [inline]
 ____sys_sendmsg+0x490/0x7b8 net/socket.c:2566
 ___sys_sendmsg+0x204/0x278 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __arm64_sys_sendmsg+0x184/0x238 net/socket.c:2655
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

The buggy address belongs to the variable:
 binder_devices+0x8/0x20

The buggy address belongs to the virtual mapping at
 [ffff80008f290000, ffff800097531000) created by:
 declare_kernel_vmas+0xa8/0xb8 arch/arm64/mm/mmu.c:774

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2100c0
flags: 0x5ffc00000002000(reserved|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000002000 fffffdffc7403008 fffffdffc7403008 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8000974c0780: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
 ffff8000974c0800: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
>ffff8000974c0880: f9 f9 f9 f9 00 f9 f9 f9 00 00 f9 f9 00 00 00 00
                                  ^
 ffff8000974c0900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8000974c0980: 00 00 00 00 00 00 00 00 00 00 04 f9 f9 f9 f9 f9
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