UDF-fs: warning (device loop0): udf_truncate_tail_extent: Too long extent after EOF in inode 1367: i_size: 134220901 lbcount: 135860736 extent 67108864+44892160
==================================================================
BUG: KASAN: use-after-free in crc_itu_t+0x1b1/0x290 lib/crc/crc-itu-t.c:61
Read of size 1 at addr ffff88800b9ff000 by task syz.0.0/5353

CPU: 0 UID: 0 PID: 5353 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
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_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 crc_itu_t+0x1b1/0x290 lib/crc/crc-itu-t.c:61
 udf_update_tag+0x7a/0x6f0 fs/udf/misc.c:261
 udf_write_aext+0x4c3/0x7b0 fs/udf/inode.c:2187
 extent_trunc+0x2b4/0x450 fs/udf/truncate.c:46
 udf_truncate_tail_extent+0x410/0x5d0 fs/udf/truncate.c:106
 udf_release_file+0xc4/0x130 fs/udf/file.c:185
 __fput+0x44c/0xa70 fs/file_table.c:468
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdcd898eec9
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:00007ffee7cda1c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fdcd8be7da0 RCX: 00007fdcd898eec9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fdcd8be7da0 R08: 000000000003ad64 R09: 0000001ce7cda4bf
R10: 00007fdcd8be7cb0 R11: 0000000000000246 R12: 0000000000012dd9
R13: 00007fdcd8be6090 R14: ffffffffffffffff R15: 00007ffee7cda2e0
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7ffffffed pfn:0xb9ff
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 ffffea00002e0108 ffff88801fc3fd70 0000000000000000
raw: 00000007ffffffed 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 5049, tgid 5049 (dhcpcd), ts 48192920166, free_ts 76527870060
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851
 compaction_alloc_noprof mm/compaction.c:1836 [inline]
 compaction_alloc+0x3099/0x34a0 mm/compaction.c:1847
 migrate_folio_unmap mm/migrate.c:1211 [inline]
 migrate_pages_batch+0x7e2/0x35c0 mm/migrate.c:1873
 migrate_pages_sync mm/migrate.c:1996 [inline]
 migrate_pages+0x1bcc/0x2930 mm/migrate.c:2105
 compact_zone+0x23e1/0x4ab0 mm/compaction.c:2647
 compact_node+0x1d2/0x280 mm/compaction.c:2916
 kcompactd+0xbc8/0x1290 mm/compaction.c:3214
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
page last free pid 29 tgid 29 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2895
 __folio_put+0x21b/0x2c0 mm/swap.c:112
 migrate_folio_move mm/migrate.c:1409 [inline]
 migrate_folios_move mm/migrate.c:1719 [inline]
 migrate_pages_batch+0x227f/0x35c0 mm/migrate.c:1966
 migrate_pages_sync mm/migrate.c:1996 [inline]
 migrate_pages+0x1bcc/0x2930 mm/migrate.c:2105
 compact_zone+0x23e1/0x4ab0 mm/compaction.c:2647
 compact_node+0x1d2/0x280 mm/compaction.c:2916
 kcompactd+0xbc8/0x1290 mm/compaction.c:3214
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Memory state around the buggy address:
 ffff88800b9fef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88800b9fef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88800b9ff000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88800b9ff080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88800b9ff100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================