[Bug 207877] New: ASMedia drive (174c:55aa) hangs in ioctl CDROM_DRIVE_STATUS when mounting a DVD

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=207877

            Bug ID: 207877
           Summary: ASMedia drive (174c:55aa) hangs in ioctl
                    CDROM_DRIVE_STATUS when mounting a DVD
           Product: IO/Storage
           Version: 2.5
    Kernel Version: 5.6.14-arch1-1
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: SCSI
          Assignee: linux-scsi@vger.kernel.org
          Reporter: zfigura@codeweavers.com
        Regression: No

Created attachment 289267
  --> https://bugzilla.kernel.org/attachment.cgi?id=289267&action=edit
dmesg including backtrace of hang

The device has USB vendor/product 174c:55aa, and is described by its USB
product string as "ASM1051E SATA 6Gb/s bridge, ASM1053E SATA 6Gb/s bridge,
ASM1153 SATA 3Gb/s bridge, ASM1153E SATA 6Gb/s bridge".

When attempting to mount via "mount /dev/sr0 /mnt", strace shows the following
sequence (tail of log):

openat(AT_FDCWD, "/dev/sr0", O_RDONLY|O_NONBLOCK|O_CLOEXEC) = 3
fadvise64(3, 0, 0, POSIX_FADV_RANDOM)   = 0
fstat(3, {st_mode=S_IFBLK|0660, st_rdev=makedev(0xb, 0), ...}) = 0
ioctl(3, BLKGETSIZE64, [8351399936])    = 0
openat(AT_FDCWD, "/sys/dev/block/11:0", O_RDONLY|O_CLOEXEC) = 4
openat(4, "dm/uuid", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or
directory)
close(4)                                = 0
openat(AT_FDCWD, "/sys/dev/block/11:0", O_RDONLY|O_CLOEXEC) = 4
faccessat(4, "partition", F_OK)         = -1 ENOENT (No such file or directory)
openat(4, "dm/uuid", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or
directory)
close(4)                                = 0
ioctl(3, CDROM_GET_CAPABILITY, 0)       = 2227183
ioctl(3, CDROM_DRIVE_STATUS

The last ioctl hangs in the kernel forever. mount cannot be killed even with
SIGKILL. dmesg shows a hang in multiple kernel thread which has been attached.

This problem occurs with at least one DVD I have tested, but I was able to
successfully mount, access, and unmount another CD-ROM.

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