================================================================== BUG: KASAN: use-after-free in crc_itu_t+0xd7/0xe0 lib/crc-itu-t.c:60 Read of size 1 at addr ffff888072c0f000 by task syz-executor179/5024 CPU: 0 PID: 5024 Comm: syz-executor179 Not tainted 6.5.0-rc4-next-20230802-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 crc_itu_t+0xd7/0xe0 lib/crc-itu-t.c:60 udf_finalize_lvid+0xf2/0x1f0 fs/udf/super.c:1984 udf_sync_fs+0xea/0x150 fs/udf/super.c:2340 sync_filesystem fs/sync.c:56 [inline] sync_filesystem+0x109/0x280 fs/sync.c:30 generic_shutdown_super+0x74/0x480 fs/super.c:472 kill_block_super+0x3b/0xc0 fs/super.c:1416 deactivate_locked_super+0x9a/0x170 fs/super.c:330 deactivate_super+0xde/0x100 fs/super.c:361 cleanup_mnt+0x222/0x3d0 fs/namespace.c:1254 task_work_run+0x14d/0x240 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa99/0x2a20 kernel/exit.c:876 do_group_exit+0xd4/0x2a0 kernel/exit.c:1026 __do_sys_exit_group kernel/exit.c:1037 [inline] __se_sys_exit_group kernel/exit.c:1035 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1035 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f230b11fa79 Code: Unable to access opcode bytes at 0x7f230b11fa4f. RSP: 002b:00007fff9831eb68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f230b11fa79 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 00007f230b1b4390 R08: ffffffffffffffb8 R09: 00007f230b1630cc R10: 00007f230b1630cc R11: 0000000000000246 R12: 00007f230b1b4390 R13: 0000000000000000 R14: 00007f230b1b5100 R15: 00007f230b0e6310 The buggy address belongs to the physical page: page:ffffea0001cb03c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x72c0f flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 ffffea0001cb0408 ffffea0001ceae48 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 5009, tgid 5009 (sshd), ts 51205508288, free_ts 51295582352 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d2/0x350 mm/page_alloc.c:1569 prep_new_page mm/page_alloc.c:1576 [inline] get_page_from_freelist+0x10d7/0x31b0 mm/page_alloc.c:3255 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4511 __folio_alloc+0x16/0x40 mm/page_alloc.c:4543 vma_alloc_folio+0x156/0x890 mm/mempolicy.c:2253 do_anonymous_page mm/memory.c:4259 [inline] do_pte_missing mm/memory.c:3816 [inline] handle_pte_fault mm/memory.c:5136 [inline] __handle_mm_fault+0x1051/0x3f90 mm/memory.c:5276 handle_mm_fault+0x47a/0xa00 mm/memory.c:5441 do_user_addr_fault+0x2e7/0xfe0 arch/x86/mm/fault.c:1342 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 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:1160 [inline] free_unref_page_prepare+0x508/0xb90 mm/page_alloc.c:2382 free_unref_page_list+0xe6/0xb30 mm/page_alloc.c:2523 release_pages+0x32a/0x14e0 mm/swap.c:1042 tlb_batch_pages_flush+0x9a/0x190 mm/mmu_gather.c:97 tlb_flush_mmu_free mm/mmu_gather.c:292 [inline] tlb_flush_mmu mm/mmu_gather.c:299 [inline] tlb_finish_mmu+0x14b/0x6f0 mm/mmu_gather.c:391 unmap_region.constprop.0+0x2e6/0x3b0 mm/mmap.c:2312 do_vmi_align_munmap+0xde3/0x15f0 mm/mmap.c:2546 do_vmi_munmap+0x20e/0x450 mm/mmap.c:2614 __vm_munmap+0x144/0x390 mm/mmap.c:2899 __do_sys_munmap mm/mmap.c:2916 [inline] __se_sys_munmap mm/mmap.c:2913 [inline] __x64_sys_munmap+0x62/0x80 mm/mmap.c:2913 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888072c0ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888072c0ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888072c0f000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888072c0f080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888072c0f100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================