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BUG: KASAN: global-out-of-bounds in fib6_clean_node+0x2dc/0x4d0
Read of size 8 at addr ffff800097ba7c48 by task dhcpcd/6110

CPU: 1 UID: 0 PID: 6110 Comm: dhcpcd Not tainted 6.14.0-rc6-syzkaller-g78e3fd2b7e4b #0
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 lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0x198/0x550 mm/kasan/report.c:521
 kasan_report+0xd8/0x138 mm/kasan/report.c:634
 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381
 fib6_clean_node+0x2dc/0x4d0
 fib6_walk_continue+0x5b8/0x7e0 net/ipv6/ip6_fib.c:2124
 fib6_walk+0x144/0x258 net/ipv6/ip6_fib.c:2172
 fib6_clean_tree net/ipv6/ip6_fib.c:2252 [inline]
 __fib6_clean_all+0x29c/0x418 net/ipv6/ip6_fib.c:2268
 fib6_clean_all+0x3c/0x50 net/ipv6/ip6_fib.c:2279
 rt6_sync_down_dev net/ipv6/route.c:4913 [inline]
 rt6_disable_ip+0x130/0x718 net/ipv6/route.c:4918
 addrconf_ifdown+0x154/0x1704 net/ipv6/addrconf.c:3849
 addrconf_notify+0x340/0xce8
 notifier_call_chain+0x1c4/0x550 kernel/notifier.c:85
 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
 call_netdevice_notifiers_info net/core/dev.c:2206 [inline]
 call_netdevice_notifiers_mtu+0x170/0x20c net/core/dev.c:2281
 dev_set_mtu_ext+0x3c8/0x544 net/core/dev.c:9397
 dev_set_mtu+0xc0/0x1a4 net/core/dev.c:9418
 dev_ifsioc+0x1d0/0x9a0 net/core/dev_ioctl.c:570
 dev_ioctl+0x4d8/0xd34 net/core/dev_ioctl.c:826
 sock_do_ioctl+0x1d4/0x2d0 net/socket.c:1213
 sock_ioctl+0x4ec/0x838 net/socket.c:1318
 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/0x1cc 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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 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
 [ffff80008fb30000, ffff800097c21000) 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:0x1ad5a7
flags: 0x5ffc00000002000(reserved|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000002000 fffffdffc5b569c8 fffffdffc5b569c8 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff800097ba7b00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
 ffff800097ba7b80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
>ffff800097ba7c00: f9 f9 f9 f9 f9 f9 f9 f9 00 f9 f9 f9 00 00 f9 f9
                                              ^
 ffff800097ba7c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff800097ba7d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 f9
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