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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 ffff00012ca0aff0 by task syz-executor.0/6592

CPU: 0 PID: 6592 Comm: syz-executor.0 Not tainted 6.2.0-syzkaller-18295-ga9b06ec42c0f #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+0x178/0x4e0 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 5973:
 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_node_track_caller+0xd0/0x1c0 mm/slab_common.c:988
 kmalloc_reserve net/core/skbuff.c:492 [inline]
 pskb_expand_head+0x190/0xfc0 net/core/skbuff.c:1899
 netlink_trim+0x160/0x204 net/netlink/af_netlink.c:1321
 netlink_broadcast+0x70/0x1054 net/netlink/af_netlink.c:1517
 nlmsg_multicast include/net/netlink.h:1082 [inline]
 nlmsg_notify+0xf4/0x1d0 net/netlink/af_netlink.c:2617
 rtnl_notify+0xa0/0xd8 net/core/rtnetlink.c:768
 rtmsg_fib+0x2fc/0x500 net/ipv4/fib_semantics.c:541
 fib_table_insert+0xc34/0x1574 net/ipv4/fib_trie.c:1404
 fib_magic net/ipv4/fib_frontend.c:1101 [inline]
 fib_add_ifaddr+0x368/0x122c net/ipv4/fib_frontend.c:1123
 fib_inetaddr_event+0x124/0x2fc net/ipv4/fib_frontend.c:1437
 notifier_call_chain kernel/notifier.c:87 [inline]
 blocking_notifier_call_chain+0xf0/0x198 kernel/notifier.c:382
 __inet_insert_ifa+0x878/0xa60 net/ipv4/devinet.c:555
 inet_insert_ifa net/ipv4/devinet.c:562 [inline]
 inetdev_event+0xc58/0x11e4 net/ipv4/devinet.c:1575
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455
 __dev_notify_flags+0x2bc/0x544
 dev_change_flags+0xd0/0x15c net/core/dev.c:8599
 do_setlink+0xc70/0x3334 net/core/rtnetlink.c:2827
 __rtnl_newlink net/core/rtnetlink.c:3590 [inline]
 rtnl_newlink+0x1354/0x1b1c 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 ffff00012ca0ac00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 496 bytes to the right of
 512-byte region [ffff00012ca0ac00, ffff00012ca0ae00)

The buggy address belongs to the physical page:
page:000000002771096a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ca08
head:000000002771096a order:2 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 ffff0000c0002600 dead000000000100 dead000000000122
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff00012ca0ae80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff00012ca0af00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff00012ca0af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff00012ca0b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff00012ca0b080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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