2023-11-28 6:03 GMT+09:00, syzbot <syzbot+listb51f932ee38ecac1b05d@xxxxxxxxxxxxxxxxxxxxxxxxx>: > Hello exfat maintainers/developers, Hi, > > This is a 31-day syzbot report for the exfat subsystem. > All related reports/information can be found at: > https://syzkaller.appspot.com/upstream/s/exfat > > During the period, 1 new issues were detected and 0 were fixed. > In total, 7 issues are still open and 12 have been fixed so far. > > Some of the still happening issues: > > Ref Crashes Repro Title > <1> 225 No INFO: task hung in path_openat (7) There is no reproducer and I couldn't find where it is connected to exfat. > > https://syzkaller.appspot.com/bug?extid=950a0cdaa2fdd14f5bdc > <2> 150 No INFO: task hung in exfat_sync_fs There is no reproducer... Let me know how to reproduce it. This can happen when disk speed is very low and a lot of writes occur. Is that so? > > https://syzkaller.appspot.com/bug?extid=205c2644abdff9d3f9fc > <3> 119 Yes WARNING in drop_nlink (2) I'm curious how this issue was classified as an exfat issue. When looking at the backtrace, this issue appears to be an hfsplus issue. hfsplus_unlink+0x3fe/0x790 fs/hfsplus/dir.c:381 hfsplus_rename+0xc8/0x1c0 fs/hfsplus/dir.c:547 vfs_rename+0xaba/0xde0 fs/namei.c:4844 > > https://syzkaller.appspot.com/bug?extid=651ca866e5e2b4b5095b > <4> 38 Yes INFO: task hung in exfat_write_inode I could not reproduce this by using C reproducer provided by you. Can you confirm that this really cannot be reproduced using it? > > https://syzkaller.appspot.com/bug?extid=2f73ed585f115e98aee8 > <5> 1 No UBSAN: shift-out-of-bounds in exfat_fill_super (2) This is false alarm. ->sect_size_bits could not be greater than 12 by the check below. /* * sect_size_bits could be at least 9 and at most 12. */ if (p_boot->sect_size_bits < EXFAT_MIN_SECT_SIZE_BITS || p_boot->sect_size_bits > EXFAT_MAX_SECT_SIZE_BITS) { exfat_err(sb, "bogus sector size bits : %u", p_boot->sect_size_bits); return -EINVAL; } > > https://syzkaller.appspot.com/bug?extid=d33808a177641a02213e > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > To disable reminders for individual bugs, reply with the following command: > #syz set <Ref> no-reminders > > To change bug's subsystems, reply with: > #syz set <Ref> subsystems: new-subsystem > > You may send multiple commands in a single email message. >
