Bug 200345

Description of problem:  If I attempt to read a DVD that is damaged in some way
(for example, because while I was burning an ISO image onto the DVD the machine
started doing something else that caused the buffer to become empty; although I
think I also saw it with a scratched DVD), the attempt to read the data off the
DVD keeps repeating forever (or at least longer than I'm willing to wait).  This
leads to the following symptoms:

 * the process trying to do the reading hangs such that it is not killable (even
with kill -9)

 * repeated messages to the system log:

Jul 23 04:03:40 ridley kernel: hdc: media error (bad sector): status=0x51 {
DriveReady SeekComplete Error }
Jul 23 04:03:40 ridley kernel: hdc: media error (bad sector): error=0x30 {
LastFailedSense=0x03 }
Jul 23 04:03:40 ridley kernel: ide: failed opcode was: unknown
Jul 23 04:03:40 ridley kernel: end_request: I/O error, dev hdc, sector 7147092
Jul 23 04:03:40 ridley kernel: Buffer I/O error on device hdc, logical block 1786773
Jul 23 04:03:45 ridley kernel: hdc: media error (bad sector): status=0x51 {
DriveReady SeekComplete Error }
Jul 23 04:03:45 ridley kernel: hdc: media error (bad sector): error=0x30 {
LastFailedSense=0x03 }
Jul 23 04:03:45 ridley kernel: ide: failed opcode was: unknown
Jul 23 04:03:45 ridley kernel: end_request: I/O error, dev hdc, sector 7146064
Jul 23 04:03:45 ridley kernel: Buffer I/O error on device hdc, logical block 1786516

etc...

 * repeated motion/noise from the DVD drive

Any attempt to physically stop the process (so that I can get the DVD out of the
drive) by removing the DVD drive from the laptop causes a kernel panic.

Version-Release number of selected component (if applicable):
kernel-2.6.17-1.2157_FC5

How reproducible:  Always, I think (except for the issue of getting a corrupted
DVD in the first place).  In other words, I've never seen any other symptoms of
having a corrupted DVD.

Steps to Reproduce:
1. Burn a corrupted DVD by burning an ISO image and doing something else with
the system such that the buffer runs empty at some point in the middle of the
process.
2. Do something that attempts to read all the files on the DVD.
  
Actual results:
Process doing the reading becomes unkillable
DVD drive is active forever (or for a very long time) and cannot be opened

Expected results:
neither of the above

Additional info:
I'm using an IBM T42 laptop.  Per lspci -v, the IDE controller is:

00:1f.1 IDE interface: Intel Corporation 82801DBM (ICH4-M) IDE Controller (rev
01) (prog-if 8a [Master SecP PriP])
        Subsystem: IBM Unknown device 052d
        Flags: bus master, medium devsel, latency 0, IRQ 11
        I/O ports at <unassigned>
        I/O ports at <unassigned>
        I/O ports at <unassigned>
        I/O ports at <unassigned>
        I/O ports at 1860 [size=16]
        Memory at 70000000 (32-bit, non-prefetchable) [size=1K]

The syslog messages from booting that are related to IDE loading are:

Jul 23 04:07:23 ridley kernel: Uniform Multi-Platform E-IDE driver Revision:
7.00alpha2
Jul 23 04:07:23 ridley kernel: ide: Assuming 33MHz system bus speed for PIO
modes; override with idebus=xx
Jul 23 04:07:23 ridley kernel: ICH4: IDE controller at PCI slot 0000:00:1f.1
Jul 23 04:07:23 ridley kernel: PCI: Enabling device 0000:00:1f.1 (0005 -> 0007)
Jul 23 04:07:23 ridley kernel: PCI: Found IRQ 11 for device 0000:00:1f.1
Jul 23 04:07:23 ridley kernel: PCI: Sharing IRQ 11 with 0000:00:1d.2
Jul 23 04:07:23 ridley kernel: PCI: Sharing IRQ 11 with 0000:02:02.0
Jul 23 04:07:23 ridley kernel: ICH4: chipset revision 1
Jul 23 04:07:23 ridley kernel: ICH4: not 100% native mode: will probe irqs later
Jul 23 04:07:23 ridley kernel:     ide0: BM-DMA at 0x1860-0x1867, BIOS settings:
hda:DMA, hdb:pio
Jul 23 04:07:23 ridley kernel:     ide1: BM-DMA at 0x1868-0x186f, BIOS settings:
hdc:DMA, hdd:pio
Jul 23 04:07:23 ridley kernel: hda: HTS726060M9AT00, ATA DISK drive
Jul 23 04:07:23 ridley kernel: ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Jul 23 04:07:23 ridley kernel: hdc: UJDA755yDVD/CDRW, ATAPI CD/DVD-ROM drive
Jul 23 04:07:23 ridley kernel: ide1 at 0x170-0x177,0x376 on irq 15
Jul 23 04:07:23 ridley kernel: hda: max request size: 128KiB
Jul 23 04:07:23 ridley kernel: hda: 117210240 sectors (60011 MB) w/7877KiB
Cache, CHS=65535/16/63, UDMA(100)
Jul 23 04:07:23 ridley kernel: hda: cache flushes supported
Jul 23 04:07:23 ridley kernel:  hda: hda1 hda2 hda3 hda4 < hda5 hda6 >
Jul 23 04:07:23 ridley kernel: hdc: ATAPI 24X DVD-ROM CD-R/RW drive, 2048kB
Cache, UDMA(33)
Jul 23 04:07:23 ridley kernel: Uniform CD-ROM driver Revision: 3.20
Jul 23 04:07:23 ridley kernel: ide-floppy driver 0.99.newide