======================================================= UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ================================================================== BUG: KASAN: use-after-free in udf_close_lvid+0x6a8/0x9a0 fs/udf/super.c:2035 Write of size 1 at addr ffff888091a29068 by task syz-executor373/5017 CPU: 0 PID: 5017 Comm: syz-executor373 Not tainted 6.5.0-rc6-syzkaller-00117-g0e8860d2125f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 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:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 udf_close_lvid+0x6a8/0x9a0 fs/udf/super.c:2035 udf_put_super+0xcd/0x160 fs/udf/super.c:2322 generic_shutdown_super+0x134/0x340 fs/super.c:499 kill_block_super+0x68/0xa0 fs/super.c:1417 deactivate_locked_super+0xa4/0x110 fs/super.c:330 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254 task_work_run+0x24a/0x300 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x68f/0x2290 kernel/exit.c:874 do_group_exit+0x206/0x2c0 kernel/exit.c:1024 __do_sys_exit_group kernel/exit.c:1035 [inline] __se_sys_exit_group kernel/exit.c:1033 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033 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 RIP: 0033:0x7fe119d7fd49 Code: Unable to access opcode bytes at 0x7fe119d7fd1f. RSP: 002b:00007ffe3145c668 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fe119d7fd49 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 00007fe119e1b390 R08: ffffffffffffffb8 R09: 0000000000000000 R10: 0000000000000022 R11: 0000000000000246 R12: 00007fe119e1b390 R13: 0000000000000000 R14: 00007fe119e1c100 R15: 00007fe119d4e030 The buggy address belongs to the physical page: page:ffffea0002468a40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x91a29 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 ffffea0002468a48 ffffea0002468a48 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: ffff888091a28f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888091a28f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888091a29000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888091a29080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888091a29100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================