======================================================= 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+0x6a4/0x9a0 fs/udf/super.c:2076 Write of size 1 at addr ffff88808c312068 by task syz-executor296/3501 CPU: 0 PID: 3501 Comm: syz-executor296 Not tainted 5.15.158-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 udf_close_lvid+0x6a4/0x9a0 fs/udf/super.c:2076 udf_put_super+0xc9/0x160 fs/udf/super.c:2363 generic_shutdown_super+0x136/0x2c0 fs/super.c:475 kill_block_super+0x7a/0xe0 fs/super.c:1414 deactivate_locked_super+0xa0/0x110 fs/super.c:335 cleanup_mnt+0x44e/0x500 fs/namespace.c:1143 task_work_run+0x129/0x1a0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0x6a3/0x2480 kernel/exit.c:872 do_group_exit+0x144/0x310 kernel/exit.c:994 __do_sys_exit_group kernel/exit.c:1005 [inline] __se_sys_exit_group kernel/exit.c:1003 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1003 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f7b9d456d89 Code: Unable to access opcode bytes at RIP 0x7f7b9d456d5f. RSP: 002b:00007ffc78616c38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f7b9d456d89 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 00007f7b9d4f2390 R08: ffffffffffffffb8 R09: 000000000001f22c R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7b9d4f2390 R13: 0000000000000000 R14: 00007f7b9d4f3100 R15: 00007f7b9d425060 The buggy address belongs to the page: page:ffffea000230c480 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8c312 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea000230c488 ffffea000230c488 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: ffff88808c311f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88808c311f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88808c312000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88808c312080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88808c312100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================