UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/17 09:39 (1000)
IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready
==================================================================
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
BUG: KASAN: slab-out-of-bounds in udf_get_fileident+0x1ea/0x200 fs/udf/directory.c:178
Read of size 2 at addr ffff888094384d3c by task syz-executor.2/9368

CPU: 1 PID: 9368 Comm: syz-executor.2 Not tainted 4.14.299-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load_n_noabort+0x6b/0x80 mm/kasan/report.c:440
 udf_get_fileident+0x1ea/0x200 fs/udf/directory.c:178
 udf_fileident_read+0x4b9/0x1840 fs/udf/directory.c:36
 udf_readdir+0x4d0/0x11f0 fs/udf/dir.c:129
 iterate_dir+0x1a0/0x5e0 fs/readdir.c:52
 SYSC_getdents fs/readdir.c:272 [inline]
 SyS_getdents+0x125/0x240 fs/readdir.c:253
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

Allocated by task 9368:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x15a/0x400 mm/slab.c:3729
 kmalloc include/linux/slab.h:493 [inline]
 udf_alloc_i_data+0x1f/0x70 fs/udf/inode.c:1612
 udf_read_inode fs/udf/inode.c:1407 [inline]
 __udf_iget+0x2750/0x3370 fs/udf/inode.c:1883
 udf_iget fs/udf/udfdecl.h:145 [inline]
 udf_lookup fs/udf/namei.c:333 [inline]
 udf_lookup+0x1c7/0x210 fs/udf/namei.c:295
 lookup_open+0x5c4/0x1750 fs/namei.c:3220
 do_last fs/namei.c:3334 [inline]
 path_openat+0x14bb/0x2970 fs/namei.c:3571
 do_filp_open+0x179/0x3c0 fs/namei.c:3605
 do_sys_open+0x296/0x410 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff888094384e00
 which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 196 bytes to the left of
 4096-byte region [ffff888094384e00, ffff888094385e00)
The buggy address belongs to the page:
page:ffffea000250e100 count:1 mapcount:0 mapping:ffff888094384e00 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff888094384e00 0000000000000000 0000000100000001
raw: ffffea00026d3a20 ffffea0002bcad20 ffff88813fe74dc0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888094384c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888094384c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888094384d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                        ^
 ffff888094384d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888094384e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1
batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems!
batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1