option from the mount to silence this warning. ======================================================= UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ================================================================== BUG: KASAN: use-after-free in crc_itu_t+0x218/0x2a0 lib/crc-itu-t.c:60 Read of size 1 at addr ffff888072300000 by task syz-executor219/3548 CPU: 0 PID: 3548 Comm: syz-executor219 Not tainted 6.1.90-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 crc_itu_t+0x218/0x2a0 lib/crc-itu-t.c:60 udf_finalize_lvid fs/udf/super.c:2022 [inline] udf_sync_fs+0x1ce/0x380 fs/udf/super.c:2378 sync_filesystem+0xe8/0x220 fs/sync.c:56 generic_shutdown_super+0x6b/0x340 fs/super.c:474 kill_block_super+0x7a/0xe0 fs/super.c:1459 deactivate_locked_super+0xa0/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1186 task_work_run+0x246/0x300 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa73/0x26a0 kernel/exit.c:869 do_group_exit+0x202/0x2b0 kernel/exit.c:1019 __do_sys_exit_group kernel/exit.c:1030 [inline] __se_sys_exit_group kernel/exit.c:1028 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1028 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f243a6b9a49 Code: Unable to access opcode bytes at 0x7f243a6b9a1f. RSP: 002b:00007ffc0e5a11f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f243a6b9a49 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 00007f243a7562d0 R08: ffffffffffffffb8 R09: 0000000000000004 R10: 0000000000001400 R11: 0000000000000246 R12: 00007f243a7562d0 R13: 0000000000000000 R14: 00007f243a757040 R15: 00007f243a687f70 The buggy address belongs to the physical page: page:ffffea0001c8c000 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x72300 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001c8c048 ffffea0001c583c8 0000000000000000 raw: 0000000000000001 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 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO), pid 3537, tgid 3537 (sshd), ts 59625323482, free_ts 59670983337 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513 prep_new_page mm/page_alloc.c:2520 [inline] get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5547 __folio_alloc+0xf/0x30 mm/page_alloc.c:5579 vma_alloc_folio+0x486/0x990 mm/mempolicy.c:2243 alloc_page_vma include/linux/gfp.h:284 [inline] do_anonymous_page mm/memory.c:4172 [inline] handle_pte_fault mm/memory.c:5011 [inline] __handle_mm_fault mm/memory.c:5155 [inline] handle_mm_fault+0x2e90/0x5340 mm/memory.c:5276 do_user_addr_fault arch/x86/mm/fault.c:1371 [inline] handle_page_fault arch/x86/mm/fault.c:1462 [inline] exc_page_fault+0x26f/0x660 arch/x86/mm/fault.c:1518 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1440 [inline] free_pcp_prepare mm/page_alloc.c:1490 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358 free_unref_page_list+0x663/0x900 mm/page_alloc.c:3499 release_pages+0x2836/0x2b40 mm/swap.c:1055 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline] tlb_flush_mmu_free mm/mmu_gather.c:254 [inline] tlb_flush_mmu+0xfc/0x210 mm/mmu_gather.c:261 tlb_finish_mmu+0xce/0x1f0 mm/mmu_gather.c:361 unmap_region+0x29f/0x2f0 mm/mmap.c:2332 do_mas_align_munmap+0xec8/0x15f0 mm/mmap.c:2582 do_mas_munmap+0x246/0x2b0 mm/mmap.c:2640 __vm_munmap+0x268/0x370 mm/mmap.c:2917 __do_sys_munmap mm/mmap.c:2942 [inline] __se_sys_munmap mm/mmap.c:2939 [inline] __x64_sys_munmap+0x5c/0x70 mm/mmap.c:2939 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff8880722fff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880722fff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888072300000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888072300080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888072300100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================