================================================================== BUG: KASAN: use-after-free in crc_itu_t+0x1d5/0x2a0 lib/crc-itu-t.c:60 Read of size 1 at addr ffff88807408e000 by task syz-executor303/5070 CPU: 0 PID: 5070 Comm: syz-executor303 Not tainted 6.2.0-syzkaller-10443-g8cbd92339db0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x143/0x170 mm/kasan/report.c:536 crc_itu_t+0x1d5/0x2a0 lib/crc-itu-t.c:60 udf_finalize_lvid fs/udf/super.c:1988 [inline] udf_sync_fs+0x1d2/0x380 fs/udf/super.c:2344 sync_filesystem+0xec/0x220 fs/sync.c:56 generic_shutdown_super+0x6f/0x340 fs/super.c:473 kill_block_super+0x7e/0xe0 fs/super.c:1398 deactivate_locked_super+0xa4/0x110 fs/super.c:331 cleanup_mnt+0x490/0x520 fs/namespace.c:1177 task_work_run+0x24a/0x300 kernel/task_work.c:179 ptrace_notify+0x2cd/0x380 kernel/signal.c:2354 ptrace_report_syscall include/linux/ptrace.h:411 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:473 [inline] syscall_exit_work kernel/entry/common.c:251 [inline] syscall_exit_to_user_mode_prepare kernel/entry/common.c:278 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x17a/0x2e0 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe1f89b7e57 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcd1e4fbb8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe1f89b7e57 RDX: 00007ffcd1e4fc79 RSI: 000000000000000a RDI: 00007ffcd1e4fc70 RBP: 00007ffcd1e4fc70 R08: 00000000ffffffff R09: 00007ffcd1e4fa50 R10: 00005555568b3653 R11: 0000000000000206 R12: 00007ffcd1e50ce0 R13: 00005555568b35f0 R14: 00007ffcd1e4fbe0 R15: 0000000000000007 The buggy address belongs to the physical page: page:ffffea0001d02380 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x7408e flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001fdb448 ffffea0001d023c8 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 5075, tgid 5075 (syz-executor303), ts 66156089751, free_ts 66244626699 prep_new_page mm/page_alloc.c:2552 [inline] get_page_from_freelist+0x37e0/0x3970 mm/page_alloc.c:4325 __alloc_pages+0x291/0x7f0 mm/page_alloc.c:5591 __folio_alloc+0x13/0x30 mm/page_alloc.c:5623 vma_alloc_folio+0x48a/0x9a0 mm/mempolicy.c:2244 do_anonymous_page mm/memory.c:4052 [inline] handle_pte_fault mm/memory.c:4907 [inline] __handle_mm_fault mm/memory.c:5051 [inline] handle_mm_fault+0x2984/0x51c0 mm/memory.c:5197 do_user_addr_fault arch/x86/mm/fault.c:1407 [inline] handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x685/0x8a0 arch/x86/mm/fault.c:1554 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:1453 [inline] free_pcp_prepare mm/page_alloc.c:1503 [inline] free_unref_page_prepare+0xf0e/0xf70 mm/page_alloc.c:3387 free_unref_page_list+0x6be/0x960 mm/page_alloc.c:3528 release_pages+0x219e/0x2470 mm/swap.c:1042 tlb_batch_pages_flush mm/mmu_gather.c:97 [inline] tlb_flush_mmu_free mm/mmu_gather.c:292 [inline] tlb_flush_mmu+0x100/0x210 mm/mmu_gather.c:299 tlb_finish_mmu+0xd4/0x1f0 mm/mmu_gather.c:391 exit_mmap+0x2c9/0x990 mm/mmap.c:3047 __mmput+0x115/0x3c0 kernel/fork.c:1209 exit_mm+0x227/0x310 kernel/exit.c:563 do_exit+0x612/0x2290 kernel/exit.c:856 do_group_exit+0x206/0x2c0 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+0x3f/0x40 kernel/exit.c:1028 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88807408df00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807408df80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88807408e000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88807408e080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88807408e100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================