================================================================== BUG: KASAN: use-after-free in udf_close_lvid+0x508/0x5c0 fs/udf/super.c:2035 Write of size 1 at addr ffff888090f44e28 by task syz-executor194/5065 CPU: 1 PID: 5065 Comm: syz-executor194 Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 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 udf_close_lvid+0x508/0x5c0 fs/udf/super.c:2035 udf_put_super+0x19c/0x200 fs/udf/super.c:2322 generic_shutdown_super+0x161/0x3c0 fs/super.c:696 kill_block_super+0x3b/0x90 fs/super.c:1667 deactivate_locked_super+0xbc/0x1a0 fs/super.c:484 deactivate_super+0xde/0x100 fs/super.c:517 cleanup_mnt+0x222/0x450 fs/namespace.c:1256 task_work_run+0x14d/0x240 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa92/0x2ae0 kernel/exit.c:871 do_group_exit+0xd4/0x2a0 kernel/exit.c:1021 __do_sys_exit_group kernel/exit.c:1032 [inline] __se_sys_exit_group kernel/exit.c:1030 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1030 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fd965b5a9c9 Code: Unable to access opcode bytes at 0x7fd965b5a99f. RSP: 002b:00007fff033a9438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fd965b5a9c9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 00007fd965bf62d0 R08: ffffffffffffffb8 R09: 0000000000000004 R10: 0000000000001400 R11: 0000000000000246 R12: 00007fd965bf62d0 R13: 0000000000000000 R14: 00007fd965bf7040 R15: 00007fd965b28f20 The buggy address belongs to the physical page: page:ffffea000243d100 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x90f44 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 ffffea000243d108 ffffea000243d108 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner info is not present (never set?) Memory state around the buggy address: ffff888090f44d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888090f44d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888090f44e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888090f44e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888090f44f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================