UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) audit: type=1800 audit(1670448487.603:2): pid=7973 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor369" name="bus" dev="loop0" ino=1367 res=0 ================================================================== BUG: KASAN: use-after-free in udf_close_lvid.isra.0+0x5a1/0x630 fs/udf/super.c:2044 Write of size 1 at addr ffff8881ae741f08 by task syz-executor369/7973 CPU: 1 PID: 7973 Comm: syz-executor369 Not tainted 4.14.300-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351 kasan_report mm/kasan/report.c:409 [inline] __asan_report_store1_noabort+0x68/0x70 mm/kasan/report.c:432 udf_close_lvid.isra.0+0x5a1/0x630 fs/udf/super.c:2044 udf_put_super+0x211/0x2a0 fs/udf/super.c:2354 generic_shutdown_super+0x144/0x370 fs/super.c:446 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xa44/0x2850 kernel/exit.c:868 do_group_exit+0x100/0x2e0 kernel/exit.c:965 SYSC_exit_group kernel/exit.c:976 [inline] SyS_exit_group+0x19/0x20 kernel/exit.c:974 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 The buggy address belongs to the page: page:ffffea0006b9d040 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x57ff00000000000() raw: 057ff00000000000 0000000000000000 0000000000000000 00000000ffffffff raw: ffffea0006b9d060 ffffea0006b9d060 0000000000000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881ae741e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881ae741e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8881ae741f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8881ae741f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881ae742000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================