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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 ffff8000974ae828 by task syz.6.392/9109

CPU: 1 UID: 0 PID: 9109 Comm: syz.6.392 Not tainted 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #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+0x914/0xcdc net/ipv6/addrconf.c:3748
 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]
 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline]
 call_netdevice_notifiers net/core/dev.c:2228 [inline]
 __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
 netif_change_flags+0xd0/0x15c net/core/dev.c:9434
 dev_change_flags+0x10c/0x204 net/core/dev_api.c:68
 devinet_ioctl+0xa38/0x1720 net/ipv4/devinet.c:1200
 inet_ioctl+0x2b0/0x3e0 net/ipv4/af_inet.c:1001
 packet_ioctl+0x1d4/0x428 net/packet/af_packet.c:4323
 sock_do_ioctl+0xf4/0x2b4 net/socket.c:1190
 sock_ioctl+0x57c/0x84c net/socket.c:1311
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:892
 __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
 [ffff80008f280000, ffff800097521000) 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:0x2102ae
flags: 0x5ffc00000002000(reserved|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000002000 fffffdffc740ab88 fffffdffc740ab88 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8000974ae700: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
 ffff8000974ae780: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
>ffff8000974ae800: f9 f9 f9 f9 00 f9 f9 f9 00 00 f9 f9 00 00 00 00
                                  ^
 ffff8000974ae880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8000974ae900: 00 00 00 00 00 00 00 00 00 00 04 f9 f9 f9 f9 f9
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