UDF-fs: warning (device loop3): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
==================================================================
BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x4c0/0x668 fs/udf/inode.c:2088
Write of size 4 at addr ffff0000ca0afff0 by task syz-executor.3/7445

CPU: 1 PID: 7445 Comm: syz-executor.3 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 5968:
 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
 kmemdup+0x5c/0x98 mm/util.c:129
 __devinet_sysctl_register+0xbc/0x238 net/ipv4/devinet.c:2575
 devinet_sysctl_register+0x130/0x1a8 net/ipv4/devinet.c:2627
 inetdev_init+0x240/0x480 net/ipv4/devinet.c:286
 inetdev_event+0x244/0x11e4 net/ipv4/devinet.c:1535
 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
 tun_set_iff+0x630/0xb0c drivers/net/tun.c:2824
 __tun_chr_ioctl+0x770/0x2ad0 drivers/net/tun.c:3092
 tun_chr_ioctl+0x38/0x4c drivers/net/tun.c:3377
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
 __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 ffff0000ca0ae000
 which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 4080 bytes to the right of
 4096-byte region [ffff0000ca0ae000, ffff0000ca0af000)

The buggy address belongs to the physical page:
page:00000000e309e677 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10a0a8
head:00000000e309e677 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0
memcg:ffff0000c5f18b01
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 ffff0000c000ca80 fffffc0004ae2200 dead000000000002
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff0000c5f18b01
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000ca0afe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000ca0aff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000ca0aff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff0000ca0b0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000ca0b0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================