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BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x4c0/0x668 fs/udf/inode.c:2088
Write of size 4 at addr ffff0000feccebf0 by task syz-executor.5/7441

CPU: 1 PID: 7441 Comm: syz-executor.5 Not tainted 6.2.0-syzkaller-18302-g596b6b709632 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
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+0xd0/0x124 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:306 [inline]
 print_report+0x174/0x4c0 mm/kasan/report.c:417
 kasan_report+0xd4/0x130 mm/kasan/report.c:517
 __asan_report_store_n_noabort+0x28/0x34 mm/kasan/report_generic.c:367
 udf_write_aext+0x4c0/0x668 fs/udf/inode.c:2088
 udf_add_entry+0x11e0/0x28b0 fs/udf/namei.c:482
 udf_mkdir+0x158/0x7e0 fs/udf/namei.c:681
 vfs_mkdir+0x334/0x4e4 fs/namei.c:4036
 do_mkdirat+0x200/0x5f8 fs/namei.c:4061
 __do_sys_mkdirat fs/namei.c:4076 [inline]
 __se_sys_mkdirat fs/namei.c:4074 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4074
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
 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+0x190/0x194 arch/arm64/kernel/entry.S:591

Allocated by task 5937:
 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:512
 ____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:968 [inline]
 __kmalloc+0xd8/0x1c4 mm/slab_common.c:981
 kmalloc include/linux/slab.h:584 [inline]
 kzalloc include/linux/slab.h:720 [inline]
 new_dir fs/proc/proc_sysctl.c:971 [inline]
 get_subdir fs/proc/proc_sysctl.c:1015 [inline]
 __register_sysctl_table+0x8b4/0xf70 fs/proc/proc_sysctl.c:1366
 register_net_sysctl+0x310/0x35c net/sysctl_net.c:169
 mpls_dev_sysctl_register+0x198/0x25c net/mpls/af_mpls.c:1421
 mpls_add_dev net/mpls/af_mpls.c:1476 [inline]
 mpls_dev_notify+0x2c0/0x708 net/mpls/af_mpls.c:1616
 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:1936 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:1974 [inline]
 call_netdevice_notifiers+0x138/0x1b8 net/core/dev.c:1988
 register_netdevice+0xea8/0x1270 net/core/dev.c:10070
 veth_newlink+0x724/0xb74 drivers/net/veth.c:1796
 rtnl_newlink_create net/core/rtnetlink.c:3407 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3624 [inline]
 rtnl_newlink+0x1174/0x1b1c net/core/rtnetlink.c:3637
 rtnetlink_rcv_msg+0x6ec/0xc8c net/core/rtnetlink.c:6141
 netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2574
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6159
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x660/0x8d4 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x800/0xae0 net/netlink/af_netlink.c:1942
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 __sys_sendto+0x3b4/0x504 net/socket.c:2120
 __do_sys_sendto net/socket.c:2132 [inline]
 __se_sys_sendto net/socket.c:2128 [inline]
 __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2128
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
 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+0x190/0x194 arch/arm64/kernel/entry.S:591

The buggy address belongs to the object at ffff0000fecce800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 496 bytes to the right of
 512-byte region [ffff0000fecce800, ffff0000feccea00)

The buggy address belongs to the physical page:
page:00000000bb477586 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13eccc
head:00000000bb477586 order:2 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 ffff0000c0002600 fffffc00033fe000 dead000000000002
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000feccea80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000fecceb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000fecceb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff0000feccec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000feccec80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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