================================================================== BUG: KASAN: use-after-free in udf_close_lvid+0x6a8/0x9a0 fs/udf/super.c:2072 Write of size 1 at addr ffff888033972b88 by task syz-executor.3/5100 CPU: 0 PID: 5100 Comm: syz-executor.3 Not tainted 6.2.0-rc7-syzkaller-00199-g420b2d431d18 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 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:306 [inline] print_report+0x163/0x4f0 mm/kasan/report.c:417 kasan_report+0x13a/0x170 mm/kasan/report.c:517 udf_close_lvid+0x6a8/0x9a0 fs/udf/super.c:2072 udf_put_super+0xcd/0x160 fs/udf/super.c:2359 generic_shutdown_super+0x134/0x310 fs/super.c:492 kill_block_super+0x7e/0xe0 fs/super.c:1386 deactivate_locked_super+0xa4/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1291 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x2e0 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ffbf3e8d567 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe29732038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ffbf3e8d567 RDX: 00007ffe2973210b RSI: 000000000000000a RDI: 00007ffe29732100 RBP: 00007ffe29732100 R08: 00000000ffffffff R09: 00007ffe29731ed0 R10: 00005555555d08b3 R11: 0000000000000246 R12: 00007ffbf3ee6b24 R13: 00007ffe297331c0 R14: 00005555555d0810 R15: 00007ffe29733200 The buggy address belongs to the physical page: page:ffffea0000ce5c80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x33972 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 dead000000000100 dead000000000122 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 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 13964, tgid 13964 (modprobe), ts 456262162508, free_ts 456441393455 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x3449/0x35c0 mm/page_alloc.c:4283 __alloc_pages+0x291/0x7e0 mm/page_alloc.c:5549 __folio_alloc+0x13/0x30 mm/page_alloc.c:5581 vma_alloc_folio+0x48a/0x9a0 mm/mempolicy.c:2248 alloc_page_vma include/linux/gfp.h:284 [inline] wp_page_copy mm/memory.c:3085 [inline] do_wp_page+0xad7/0x3280 mm/memory.c:3443 handle_pte_fault mm/memory.c:4949 [inline] __handle_mm_fault mm/memory.c:5073 [inline] handle_mm_fault+0x2395/0x51e0 mm/memory.c:5219 do_user_addr_fault arch/x86/mm/fault.c:1428 [inline] handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x673/0x880 arch/x86/mm/fault.c:1575 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:1446 [inline] free_pcp_prepare mm/page_alloc.c:1496 [inline] free_unref_page_prepare+0xf3a/0x1040 mm/page_alloc.c:3369 free_unref_page_list+0x6b1/0x950 mm/page_alloc.c:3510 release_pages+0x219e/0x2470 mm/swap.c:1076 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+0x2c6/0x970 mm/mmap.c:3100 __mmput+0x115/0x3c0 kernel/fork.c:1207 exit_mm+0x227/0x310 kernel/exit.c:563 do_exit+0x588/0x2210 kernel/exit.c:854 do_group_exit+0x206/0x2c0 kernel/exit.c:1012 __do_sys_exit_group kernel/exit.c:1023 [inline] __se_sys_exit_group kernel/exit.c:1021 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1021 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: ffff888033972a80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888033972b00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888033972b80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888033972c00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888033972c80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================