UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) audit: type=1800 audit(1670064629.119:2): pid=8095 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor678" name="bus" dev="loop0" ino=1357 res=0 ================================================================== BUG: KASAN: use-after-free in crc_itu_t+0xce/0xe0 lib/crc-itu-t.c:62 Read of size 1 at addr ffff88808b891000 by task syz-executor678/8095 CPU: 0 PID: 8095 Comm: syz-executor678 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load1_noabort+0x88/0x90 mm/kasan/report.c:430 crc_itu_t+0xce/0xe0 lib/crc-itu-t.c:62 udf_close_lvid+0x47a/0x770 fs/udf/super.c:2064 udf_put_super+0x217/0x290 fs/udf/super.c:2361 generic_shutdown_super+0x144/0x370 fs/super.c:456 kill_block_super+0x97/0xf0 fs/super.c:1185 deactivate_locked_super+0x94/0x160 fs/super.c:329 deactivate_super+0x174/0x1a0 fs/super.c:360 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 do_group_exit+0x125/0x310 kernel/exit.c:967 __do_sys_exit_group kernel/exit.c:978 [inline] __se_sys_exit_group kernel/exit.c:976 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:976 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc31a6584f9 Code: Bad RIP value. RSP: 002b:00007ffe505bbc28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007fc31a6d0430 RCX: 00007fc31a6584f9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 0000000000000000 R10: 000080001d00c0d0 R11: 0000000000000246 R12: 00007fc31a6d0430 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 The buggy address belongs to the page: page:ffffea00022e2440 count:0 mapcount:0 mapping:0000000000000000 index:0x1 flags: 0xfff00000000000() raw: 00fff00000000000 ffffea00023b4888 ffffea00022e3748 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88808b890f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88808b890f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88808b891000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88808b891080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88808b891100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================