UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
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BUG: KASAN: slab-out-of-bounds in udf_write_aext+0x6e3/0x7d0 fs/udf/inode.c:2076
Write of size 4 at addr ffff8880b36f00b0 by task syz-executor235/7979

CPU: 0 PID: 7979 Comm: syz-executor235 Not tainted 4.14.302-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_store_n_noabort+0x6b/0x80 mm/kasan/report.c:446
 udf_write_aext+0x6e3/0x7d0 fs/udf/inode.c:2076
 udf_add_entry+0xc54/0x2710 fs/udf/namei.c:501
 udf_mkdir+0x122/0x620 fs/udf/namei.c:699
 vfs_mkdir+0x463/0x6e0 fs/namei.c:3851
 SYSC_mkdirat fs/namei.c:3874 [inline]
 SyS_mkdirat+0x1fd/0x270 fs/namei.c:3858
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7ffaa5d61b59
RSP: 002b:00007fff4e944a78 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffaa5d61b59
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 00007ffaa5d21160 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffaa5d211f0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 7979:
 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]
 kzalloc include/linux/slab.h:661 [inline]
 udf_new_inode+0x1f6/0xce0 fs/udf/ialloc.c:75
 udf_mkdir+0x95/0x620 fs/udf/namei.c:692
 vfs_mkdir+0x463/0x6e0 fs/namei.c:3851
 SYSC_mkdirat fs/namei.c:3874 [inline]
 SyS_mkdirat+0x1fd/0x270 fs/namei.c:3858
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

Freed by task 6352:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xc9/0x250 mm/slab.c:3815
 kernfs_fop_release+0x10e/0x180 fs/kernfs/file.c:783
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

The buggy address belongs to the object at ffff8880b36f00c0
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 16 bytes to the left of
 512-byte region [ffff8880b36f00c0, ffff8880b36f02c0)
The buggy address belongs to the page:
page:ffffea0002cdbc00 count:1 mapcount:0 mapping:ffff8880b36f00c0 index:0x0
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffff8880b36f00c0 0000000000000000 0000000100000006
raw: ffffea00025ad3e0 ffffea0002cbe620 ffff88813fe74940 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880b36eff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880b36f0000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880b36f0080: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
                                     ^
 ffff8880b36f0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880b36f0180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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