netlink: 8 bytes leftover after parsing attributes in process `syz.4.165'.
loop4: detected capacity change from 0 to 128
VFS: Found a Xenix FS (block size = 1024) on device loop4
==================================================================
BUG: KASAN: slab-out-of-bounds in sysv_new_inode+0xd8c/0xf04 fs/sysv/ialloc.c:153
Read of size 2 at addr ffff0000f0e031ce by task syz.4.165/5068

CPU: 0 PID: 5068 Comm: syz.4.165 Not tainted 6.1.124-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0x174/0x4c0 mm/kasan/report.c:427
 kasan_report+0xd4/0x130 mm/kasan/report.c:531
 __asan_report_load2_noabort+0x2c/0x38 mm/kasan/report_generic.c:349
 sysv_new_inode+0xd8c/0xf04 fs/sysv/ialloc.c:153
 sysv_mknod+0x5c/0x100 fs/sysv/namei.c:53
 vfs_mknod+0x3c8/0x448 fs/namei.c:3985
 do_mknodat+0x3f8/0x610
 __do_sys_mknodat fs/namei.c:4063 [inline]
 __se_sys_mknodat fs/namei.c:4060 [inline]
 __arm64_sys_mknodat+0xb0/0xcc fs/namei.c:4060
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Allocated by task 4302:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:936 [inline]
 __kmalloc+0xd8/0x1c4 mm/slab_common.c:949
 kmalloc include/linux/slab.h:568 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 new_dir fs/proc/proc_sysctl.c:969 [inline]
 get_subdir fs/proc/proc_sysctl.c:1013 [inline]
 __register_sysctl_table+0x8b4/0xf70 fs/proc/proc_sysctl.c:1375
 register_net_sysctl+0x310/0x35c net/sysctl_net.c:168
 neigh_sysctl_register+0x804/0x8d8 net/core/neighbour.c:3848
 devinet_sysctl_register+0xb0/0x1a8 net/ipv4/devinet.c:2649
 inetdev_init+0x278/0x4b8 net/ipv4/devinet.c:280
 inetdev_event+0xe54/0x1214 net/ipv4/devinet.c:1547
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455
 call_netdevice_notifiers_info net/core/dev.c:1970 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2008 [inline]
 call_netdevice_notifiers+0x138/0x1b8 net/core/dev.c:2022
 register_netdevice+0x117c/0x150c net/core/dev.c:10194
 veth_newlink+0x718/0xb44 drivers/net/veth.c:1755
 rtnl_newlink_create net/core/rtnetlink.c:3419 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3639 [inline]
 rtnl_newlink+0x116c/0x1b74 net/core/rtnetlink.c:3652
 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6150
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2493
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6168
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1859
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 __sys_sendto+0x3b8/0x508 net/socket.c:2153
 __do_sys_sendto net/socket.c:2165 [inline]
 __se_sys_sendto net/socket.c:2161 [inline]
 __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2161
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the object at ffff0000f0e03000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 462 bytes inside of
 512-byte region [ffff0000f0e03000, ffff0000f0e03200)

The buggy address belongs to the physical page:
page:00000000d257d62e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x130e00
head:00000000d257d62e order:2 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 dead000000000001 ffff0000c0002600
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f0e03080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000f0e03100: 07 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000f0e03180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                              ^
 ffff0000f0e03200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000f0e03280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
syz.4.165: attempt to access beyond end of device
loop4: rw=2049, sector=6491536, nr_sectors = 2 limit=128
Buffer I/O error on dev loop4, logical block 3245768, lost async page write
netlink: 4 bytes leftover after parsing attributes in process `syz.4.165'.