loop0: detected capacity change from 0 to 2048
UDF-fs: warning (device loop0): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
loop0: detected capacity change from 2048 to 2047
==================================================================
BUG: KASAN: slab-out-of-bounds in crc_itu_t+0x1d5/0x2b0 lib/crc-itu-t.c:60
Read of size 1 at addr ffff8880440007c0 by task syz.0.0/5324

CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted 6.14.0-rc7-syzkaller-00205-g586de92313fc #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0x16e/0x5b0 mm/kasan/report.c:521
 kasan_report+0x143/0x180 mm/kasan/report.c:634
 crc_itu_t+0x1d5/0x2b0 lib/crc-itu-t.c:60
 udf_update_tag+0x70/0x6a0 fs/udf/misc.c:261
 udf_write_aext+0x4d8/0x7b0 fs/udf/inode.c:2179
 extent_trunc+0x2f7/0x4a0 fs/udf/truncate.c:46
 udf_truncate_extents+0x6ed/0x1310 fs/udf/truncate.c:271
 udf_setsize+0xaeb/0x1490 fs/udf/inode.c:1316
 udf_evict_inode+0x7d/0x3e0 fs/udf/inode.c:144
 evict+0x4e8/0x9a0 fs/inode.c:796
 __dentry_kill+0x20d/0x630 fs/dcache.c:643
 dput+0x19f/0x2b0 fs/dcache.c:885
 __fput+0x60b/0x9f0 fs/file_table.c:472
 task_work_run+0x24f/0x310 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8154b8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8155992038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f8154da5fa0 RCX: 00007f8154b8d169
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000004
RBP: 00007f8154c0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8154da5fa0 R15: 00007ffef40097c8
 </TASK>

Allocated by task 5024:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171
 sk_prot_alloc+0x58/0x210 net/core/sock.c:2175
 sk_alloc+0x3e/0x370 net/core/sock.c:2234
 unix_create1+0xb4/0x7a0
 unix_create+0x14e/0x200 net/unix/af_unix.c:1091
 __sock_create+0x4c0/0xa30 net/socket.c:1548
 sock_create net/socket.c:1606 [inline]
 __sys_socketpair+0x33e/0x720 net/socket.c:1757
 __do_sys_socketpair net/socket.c:1806 [inline]
 __se_sys_socketpair net/socket.c:1803 [inline]
 __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1803
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888044000000
 which belongs to the cache UNIX of size 1984
The buggy address is located 0 bytes to the right of
 allocated 1984-byte region [ffff888044000000, ffff8880440007c0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888044002100 pfn:0x44000
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x4fff00000000240(workingset|head|node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000240 ffff88801f046280 ffff8880332d1ac8 ffffea0001103210
raw: ffff888044002100 00000000000f000d 00000000f5000000 0000000000000000
head: 04fff00000000240 ffff88801f046280 ffff8880332d1ac8 ffffea0001103210
head: ffff888044002100 00000000000f000d 00000000f5000000 0000000000000000
head: 04fff00000000003 ffffea0001100001 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5024, tgid 5024 (dhcpcd), ts 48270385928, free_ts 46766594123
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4740
 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
 alloc_slab_page mm/slub.c:2423 [inline]
 allocate_slab+0x8f/0x3a0 mm/slub.c:2587
 new_slab mm/slub.c:2640 [inline]
 ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826
 __slab_alloc+0x58/0xa0 mm/slub.c:3916
 __slab_alloc_node mm/slub.c:3991 [inline]
 slab_alloc_node mm/slub.c:4152 [inline]
 kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4171
 sk_prot_alloc+0x58/0x210 net/core/sock.c:2175
 sk_alloc+0x3e/0x370 net/core/sock.c:2234
 unix_create1+0xb4/0x7a0
 unix_create+0x14e/0x200 net/unix/af_unix.c:1091
 __sock_create+0x4c0/0xa30 net/socket.c:1548
 sock_create net/socket.c:1606 [inline]
 __sys_socketpair+0x33e/0x720 net/socket.c:1757
 __do_sys_socketpair net/socket.c:1806 [inline]
 __se_sys_socketpair net/socket.c:1803 [inline]
 __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1803
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
page last free pid 5192 tgid 5192 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660
 __slab_free+0x2c2/0x380 mm/slub.c:4520
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 __do_kmalloc_node mm/slub.c:4293 [inline]
 __kmalloc_noprof+0x236/0x4c0 mm/slub.c:4306
 kmalloc_noprof include/linux/slab.h:905 [inline]
 tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x2c0/0x610 security/tomoyo/file.c:822
 security_inode_getattr+0x130/0x330 security/security.c:2377
 vfs_getattr fs/stat.c:243 [inline]
 vfs_fstat fs/stat.c:265 [inline]
 vfs_fstatat+0xa3/0x150 fs/stat.c:366
 __do_sys_newfstatat fs/stat.c:532 [inline]
 __se_sys_newfstatat fs/stat.c:526 [inline]
 __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:526
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888044000680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888044000700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888044000780: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                           ^
 ffff888044000800: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
 ffff888044000880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================