Bug 713515

Summary: kernel crash when unplugging (mounted) usb cdrom drive
Product: [Fedora] Fedora Reporter: Jurgen Kramer <gtmkramer>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 15CC: aquini, gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-07-13 08:59:42 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Jurgen Kramer 2011-06-15 16:08:47 UTC 
Description of problem:
While testing with the Apple USB SuperDrive (BZ#713509) I accidental unplugged the drive while being mounted. This resulted in a kernel dump/crash.

Version-Release number of selected component (if applicable):
kernel-2.6.38.7-30.fc15.x86_64

How reproducible:
always

Steps to Reproduce:
1. Connect SuperDrive, insert disc
2. Let it be mounted
3. Unplug USB SuperDrive
  
Actual results:
Unplugging mounted USB SuperDrive causes kernel dump

Expected results:
No dump


Additional info:
Of course unplugging a mounted drive is not normal behaviour it probably should no cause a kernel dump.

Jun 15 17:53:32 paragon kernel: [  290.086410] usb 1-5.4: new high speed USB device using ehci_hcd and address 6
Jun 15 17:53:32 paragon kernel: [  290.180250] usb 1-5.4: New USB device found, idVendor=05ac, idProduct=1500
Jun 15 17:53:32 paragon kernel: [  290.180255] usb 1-5.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Jun 15 17:53:32 paragon kernel: [  290.180259] usb 1-5.4: Product: MacBook Air SuperDrive
Jun 15 17:53:32 paragon kernel: [  290.180262] usb 1-5.4: Manufacturer: Apple Inc.
Jun 15 17:53:32 paragon kernel: [  290.180264] usb 1-5.4: SerialNumber: KZ1A9SL0257     
Jun 15 17:53:32 paragon kernel: [  290.188000] scsi9 : usb-storage 1-5.4:1.0
Jun 15 17:53:32 paragon mtp-probe: checking bus 1, device 6: "/sys/devices/pci0000:00/0000:00:1a.7/usb1/1-5/1-5.4"
Jun 15 17:53:32 paragon mtp-probe: bus: 1, device: 6 was not an MTP device
Jun 15 17:53:33 paragon kernel: [  291.197731] scsi 9:0:0:0: CD-ROM            Apple    SuperDrive       2.00 PQ: 0 ANSI: 0
Jun 15 17:53:33 paragon kernel: [  291.232074] sr1: scsi3-mmc drive: 24x/24x writer cd/rw xa/form2 cdda tray
Jun 15 17:53:33 paragon kernel: [  291.233450] sr 9:0:0:0: Attached scsi generic sg4 type 5


Jun 15 17:56:17 paragon kernel: [  455.529073] usb 1-5.4: USB disconnect, address 6
Jun 15 17:56:17 paragon kernel: [  455.552671] ------------[ cut here ]------------
Jun 15 17:56:17 paragon kernel: [  455.552680] WARNING: at lib/list_debug.c:26 __list_add+0x3d/0x7f()
Jun 15 17:56:17 paragon kernel: [  455.552683] Hardware name: System Product Name
Jun 15 17:56:17 paragon kernel: [  455.552687] list_add corruption. next->prev should be prev (ffff88018c5206d0), but was ffff88018c520000. (next=ffff88018c520000).
Jun 15 17:56:17 paragon kernel: [  455.552690] Modules linked in: tcp_lp nls_utf8 usb_storage uas fuse ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat xt_CHECKSUM iptable_mangle bridge stp llc sunrpc cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables nvidia(P) snd_emu10k1_synth snd_emux_synth snd_seq_virmidi snd_seq_midi_event snd_seq_midi_emul snd_emu10k1 snd_rawmidi snd_ac97_codec ac97_bus snd_seq snd_pcm snd_seq_device snd_timer microcode snd_page_alloc snd_util_mem snd_hwdep snd serio_raw soundcore emu10k1_gp iTCO_wdt gameport i2c_i801 iTCO_vendor_support i7core_edac asus_atk0110 sky2 wmi edac_core i2c_core virtio_net kvm_intel kvm ipv6 firewire_ohci pata_acpi ata_generic firewire_core crc_itu_t pata_marvell [last unloaded: scsi_wait_scan]
Jun 15 17:56:17 paragon kernel: [  455.552751] Pid: 2230, comm: umount Tainted: P            2.6.38.7-30.fc15.x86_64 #1
Jun 15 17:56:17 paragon kernel: [  455.552754] Call Trace:
Jun 15 17:56:17 paragon kernel: [  455.552761]  [<ffffffff8105511a>] warn_slowpath_common+0x83/0x9b
Jun 15 17:56:17 paragon kernel: [  455.552765]  [<ffffffff810551d5>] warn_slowpath_fmt+0x46/0x48
Jun 15 17:56:17 paragon kernel: [  455.552770]  [<ffffffff81237882>] __list_add+0x3d/0x7f
Jun 15 17:56:17 paragon kernel: [  455.552776]  [<ffffffff81211346>] elv_insert+0x90/0x17b
Jun 15 17:56:17 paragon kernel: [  455.552780]  [<ffffffff812114a2>] __elv_add_request+0x71/0x78
Jun 15 17:56:17 paragon kernel: [  455.552787]  [<ffffffff814757cb>] ? _raw_spin_lock_irq+0x1c/0x1e
Jun 15 17:56:17 paragon kernel: [  455.552792]  [<ffffffff812198aa>] blk_execute_rq_nowait+0x6d/0x9c
Jun 15 17:56:17 paragon kernel: [  455.552796]  [<ffffffff81219972>] blk_execute_rq+0x99/0xcf
Jun 15 17:56:17 paragon kernel: [  455.552801]  [<ffffffff8147577e>] ? _raw_spin_lock+0xe/0x10
Jun 15 17:56:17 paragon kernel: [  455.552806]  [<ffffffff81216a4e>] ? blk_get_request+0x3f/0x6e
Jun 15 17:56:17 paragon kernel: [  455.552812]  [<ffffffff812fca34>] scsi_execute+0xf4/0x146
Jun 15 17:56:17 paragon kernel: [  455.552816]  [<ffffffff812fcb22>] scsi_execute_req+0x9c/0xce
Jun 15 17:56:17 paragon kernel: [  455.552821]  [<ffffffff812f8bbc>] ioctl_internal_command.constprop.1+0x6b/0x163
Jun 15 17:56:17 paragon kernel: [  455.552827]  [<ffffffff8115044c>] ? inotify_remove_from_idr+0x1ee/0x1f0
Jun 15 17:56:17 paragon kernel: [  455.552831]  [<ffffffff812f8d0d>] scsi_set_medium_removal+0x59/0x94
Jun 15 17:56:17 paragon kernel: [  455.552836]  [<ffffffff8130b329>] sr_lock_door+0x20/0x22
Jun 15 17:56:17 paragon kernel: [  455.552841]  [<ffffffff8132c579>] cdrom_release+0x195/0x205
Jun 15 17:56:17 paragon kernel: [  455.552847]  [<ffffffff8104127e>] ? should_resched+0xe/0x2d
Jun 15 17:56:17 paragon kernel: [  455.552851]  [<ffffffff81474228>] ? _cond_resched+0xe/0x22
Jun 15 17:56:17 paragon kernel: [  455.552856]  [<ffffffff8130a2bd>] sr_block_release+0x30/0x4d
Jun 15 17:56:17 paragon kernel: [  455.552860]  [<ffffffff81149c22>] __blkdev_put+0xc6/0x179
Jun 15 17:56:17 paragon kernel: [  455.552864]  [<ffffffff81149dd9>] blkdev_put+0x104/0x10c
Jun 15 17:56:17 paragon kernel: [  455.552870]  [<ffffffff811230e5>] kill_block_super+0x65/0x6a
Jun 15 17:56:17 paragon kernel: [  455.552874]  [<ffffffff81123321>] deactivate_locked_super+0x26/0x4b
Jun 15 17:56:17 paragon kernel: [  455.552879]  [<ffffffff81123e8a>] deactivate_super+0x37/0x3b
Jun 15 17:56:17 paragon kernel: [  455.552884]  [<ffffffff811387bc>] mntput_no_expire+0xcc/0xd1
Jun 15 17:56:17 paragon kernel: [  455.552888]  [<ffffffff811391f3>] sys_umount+0x2ac/0x2da
Jun 15 17:56:17 paragon kernel: [  455.552893]  [<ffffffff81009bc2>] system_call_fastpath+0x16/0x1b
Jun 15 17:56:17 paragon kernel: [  455.552896] ---[ end trace c9cbf46c98b4de76 ]---
Jun 15 17:56:17 paragon kernel: [  455.552899] scsi: killing requests for dead queue
Jun 15 17:56:17 paragon kernel: [  455.552903] BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:1087
Jun 15 17:56:17 paragon kernel: [  455.552908] in_atomic(): 0, irqs_disabled(): 1, pid: 2230, name: umount
Jun 15 17:56:17 paragon kernel: [  455.552911] Pid: 2230, comm: umount Tainted: P        W   2.6.38.7-30.fc15.x86_64 #1
Jun 15 17:56:17 paragon kernel: [  455.552914] Call Trace:
Jun 15 17:56:17 paragon kernel: [  455.552918]  [<ffffffff81047d33>] __might_sleep+0xeb/0xf0
Jun 15 17:56:17 paragon kernel: [  455.552923]  [<ffffffff81478bc3>] do_page_fault+0x1eb/0x37a
Jun 15 17:56:17 paragon kernel: [  455.552928]  [<ffffffff814757e4>] ? _raw_spin_unlock_irqrestore+0x17/0x19
Jun 15 17:56:17 paragon kernel: [  455.552934]  [<ffffffff8123062e>] ? vsnprintf+0x83/0x401
Jun 15 17:56:17 paragon kernel: [  455.552940]  [<ffffffff81080b9f>] ? arch_local_irq_save+0x15/0x1b
Jun 15 17:56:17 paragon kernel: [  455.552945]  [<ffffffff81475fd5>] page_fault+0x25/0x30
Jun 15 17:56:17 paragon kernel: [  455.552949]  [<ffffffff812fd72d>] ? scsi_prep_state_check+0x9/0x75
Jun 15 17:56:17 paragon kernel: [  455.552954]  [<ffffffff812fe135>] scsi_setup_blk_pc_cmnd+0x1b/0x10c
Jun 15 17:56:17 paragon kernel: [  455.552959]  [<ffffffff812fe24f>] scsi_prep_fn+0x29/0x3b
Jun 15 17:56:17 paragon kernel: [  455.552962]  [<ffffffff81216d51>] blk_peek_request+0xe1/0x1b6
Jun 15 17:56:17 paragon kernel: [  455.552967]  [<ffffffff812fd98a>] scsi_request_fn+0x48/0x421
Jun 15 17:56:17 paragon kernel: [  455.552971]  [<ffffffff81216878>] __generic_unplug_device+0x34/0x38
Jun 15 17:56:17 paragon kernel: [  455.552976]  [<ffffffff812198b2>] blk_execute_rq_nowait+0x75/0x9c
Jun 15 17:56:17 paragon kernel: [  455.552980]  [<ffffffff81219972>] blk_execute_rq+0x99/0xcf
Jun 15 17:56:17 paragon kernel: [  455.552984]  [<ffffffff8147577e>] ? _raw_spin_lock+0xe/0x10
Jun 15 17:56:17 paragon kernel: [  455.552989]  [<ffffffff81216a4e>] ? blk_get_request+0x3f/0x6e
Jun 15 17:56:17 paragon kernel: [  455.552993]  [<ffffffff812fca34>] scsi_execute+0xf4/0x146
Jun 15 17:56:17 paragon kernel: [  455.552997]  [<ffffffff812fcb22>] scsi_execute_req+0x9c/0xce
Jun 15 17:56:17 paragon kernel: [  455.553002]  [<ffffffff812f8bbc>] ioctl_internal_command.constprop.1+0x6b/0x163
Jun 15 17:56:17 paragon kernel: [  455.553007]  [<ffffffff8115044c>] ? inotify_remove_from_idr+0x1ee/0x1f0
Jun 15 17:56:17 paragon kernel: [  455.553011]  [<ffffffff812f8d0d>] scsi_set_medium_removal+0x59/0x94
Jun 15 17:56:17 paragon kernel: [  455.553015]  [<ffffffff8130b329>] sr_lock_door+0x20/0x22
Jun 15 17:56:17 paragon kernel: [  455.553019]  [<ffffffff8132c579>] cdrom_release+0x195/0x205
Jun 15 17:56:17 paragon kernel: [  455.553024]  [<ffffffff8104127e>] ? should_resched+0xe/0x2d
Jun 15 17:56:17 paragon kernel: [  455.553028]  [<ffffffff81474228>] ? _cond_resched+0xe/0x22
Jun 15 17:56:17 paragon kernel: [  455.553032]  [<ffffffff8130a2bd>] sr_block_release+0x30/0x4d
Jun 15 17:56:17 paragon kernel: [  455.553036]  [<ffffffff81149c22>] __blkdev_put+0xc6/0x179
Jun 15 17:56:17 paragon kernel: [  455.553040]  [<ffffffff81149dd9>] blkdev_put+0x104/0x10c
Jun 15 17:56:17 paragon kernel: [  455.553044]  [<ffffffff811230e5>] kill_block_super+0x65/0x6a
Jun 15 17:56:17 paragon kernel: [  455.553049]  [<ffffffff81123321>] deactivate_locked_super+0x26/0x4b
Jun 15 17:56:17 paragon kernel: [  455.553054]  [<ffffffff81123e8a>] deactivate_super+0x37/0x3b
Jun 15 17:56:17 paragon kernel: [  455.553058]  [<ffffffff811387bc>] mntput_no_expire+0xcc/0xd1
Jun 15 17:56:17 paragon kernel: [  455.553062]  [<ffffffff811391f3>] sys_umount+0x2ac/0x2da
Jun 15 17:56:17 paragon kernel: [  455.553066]  [<ffffffff81009bc2>] system_call_fastpath+0x16/0x1b
Jun 15 17:56:17 paragon kernel: [  455.553073] BUG: unable to handle kernel NULL pointer dereference at 0000000000000600
Jun 15 17:56:17 paragon kernel: [  455.553077] IP: [<ffffffff812fd72d>] scsi_prep_state_check+0x9/0x75
Jun 15 17:56:17 paragon kernel: [  455.553082] PGD 0 
Jun 15 17:56:17 paragon kernel: [  455.553085] Oops: 0000 [#1] SMP 
Jun 15 17:56:17 paragon kernel: [  455.553088] last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb2/idProduct
Jun 15 17:56:17 paragon kernel: [  455.553092] CPU 0 
Jun 15 17:56:17 paragon kernel: [  455.553094] Modules linked in: tcp_lp nls_utf8 usb_storage uas fuse ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat xt_CHECKSUM iptable_mangle bridge stp llc sunrpc cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables nvidia(P) snd_emu10k1_synth snd_emux_synth snd_seq_virmidi snd_seq_midi_event snd_seq_midi_emul snd_emu10k1 snd_rawmidi snd_ac97_codec ac97_bus snd_seq snd_pcm snd_seq_device snd_timer microcode snd_page_alloc snd_util_mem snd_hwdep snd serio_raw soundcore emu10k1_gp iTCO_wdt gameport i2c_i801 iTCO_vendor_support i7core_edac asus_atk0110 sky2 wmi edac_core i2c_core virtio_net kvm_intel kvm ipv6 firewire_ohci pata_acpi ata_generic firewire_core crc_itu_t pata_marvell [last unloaded: scsi_wait_scan]
Jun 15 17:56:17 paragon kernel: [  455.553149] 
Jun 15 17:56:17 paragon kernel: [  455.553152] Pid: 2230, comm: umount Tainted: P        W   2.6.38.7-30.fc15.x86_64 #1 System manufacturer System Product Name/P6T DELUXE
Jun 15 17:56:17 paragon kernel: [  455.553159] RIP: 0010:[<ffffffff812fd72d>]  [<ffffffff812fd72d>] scsi_prep_state_check+0x9/0x75
Jun 15 17:56:17 paragon kernel: [  455.553165] RSP: 0018:ffff88018c79f9e8  EFLAGS: 00010046
Jun 15 17:56:17 paragon kernel: [  455.553168] RAX: 0000000000000001 RBX: ffff8801aec28870 RCX: 000000000000cafa
Jun 15 17:56:17 paragon kernel: [  455.553172] RDX: 0000000000000000 RSI: ffff8801aec28870 RDI: 0000000000000000
Jun 15 17:56:17 paragon kernel: [  455.553175] RBP: ffff88018c79f9e8 R08: 0000000000000002 R09: 0000ffff00066c0a
Jun 15 17:56:17 paragon kernel: [  455.553178] R10: 0000ffff00066c0a R11: 0000000000000000 R12: ffff88018c5206d0
Jun 15 17:56:17 paragon kernel: [  455.553181] R13: 0000000000000000 R14: ffff880197a95a20 R15: 0000000000000000
Jun 15 17:56:17 paragon kernel: [  455.553185] FS:  00007fbc49e2a820(0000) GS:ffff8800bf400000(0000) knlGS:0000000000000000
Jun 15 17:56:17 paragon kernel: [  455.553188] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jun 15 17:56:17 paragon kernel: [  455.553191] CR2: 0000000000000600 CR3: 00000001afe42000 CR4: 00000000000006f0
Jun 15 17:56:17 paragon kernel: [  455.553194] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Jun 15 17:56:17 paragon kernel: [  455.553197] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Jun 15 17:56:17 paragon kernel: [  455.553201] Process umount (pid: 2230, threadinfo ffff88018c79e000, task ffff880197d79730)
Jun 15 17:56:17 paragon kernel: [  455.553203] Stack:
Jun 15 17:56:17 paragon kernel: [  455.553205]  ffff88018c79fa18 ffffffff812fe135 0000000000000002 ffff8801aec28870
Jun 15 17:56:17 paragon kernel: [  455.553211]  ffff88018c5206d0 ffff88018c520bc8 ffff88018c79fa38 ffffffff812fe24f
Jun 15 17:56:17 paragon kernel: [  455.553217]  ffff8801aec28870 ffff88018c5206d0 ffff88018c79fa68 ffffffff81216d51
Jun 15 17:56:17 paragon kernel: [  455.553222] Call Trace:
Jun 15 17:56:17 paragon kernel: [  455.553226]  [<ffffffff812fe135>] scsi_setup_blk_pc_cmnd+0x1b/0x10c
Jun 15 17:56:17 paragon kernel: [  455.553231]  [<ffffffff812fe24f>] scsi_prep_fn+0x29/0x3b
Jun 15 17:56:17 paragon kernel: [  455.553235]  [<ffffffff81216d51>] blk_peek_request+0xe1/0x1b6
Jun 15 17:56:17 paragon kernel: [  455.553239]  [<ffffffff812fd98a>] scsi_request_fn+0x48/0x421
Jun 15 17:56:17 paragon kernel: [  455.553244]  [<ffffffff81216878>] __generic_unplug_device+0x34/0x38
Jun 15 17:56:17 paragon kernel: [  455.553249]  [<ffffffff812198b2>] blk_execute_rq_nowait+0x75/0x9c
Jun 15 17:56:17 paragon kernel: [  455.553253]  [<ffffffff81219972>] blk_execute_rq+0x99/0xcf
Jun 15 17:56:17 paragon kernel: [  455.553258]  [<ffffffff8147577e>] ? _raw_spin_lock+0xe/0x10
Jun 15 17:56:17 paragon kernel: [  455.553263]  [<ffffffff81216a4e>] ? blk_get_request+0x3f/0x6e
Jun 15 17:56:17 paragon kernel: [  455.553267]  [<ffffffff812fca34>] scsi_execute+0xf4/0x146
Jun 15 17:56:17 paragon kernel: [  455.553271]  [<ffffffff812fcb22>] scsi_execute_req+0x9c/0xce
Jun 15 17:56:17 paragon kernel: [  455.553276]  [<ffffffff812f8bbc>] ioctl_internal_command.constprop.1+0x6b/0x163
Jun 15 17:56:17 paragon kernel: [  455.553281]  [<ffffffff8115044c>] ? inotify_remove_from_idr+0x1ee/0x1f0
Jun 15 17:56:17 paragon kernel: [  455.553285]  [<ffffffff812f8d0d>] scsi_set_medium_removal+0x59/0x94
Jun 15 17:56:17 paragon kernel: [  455.553290]  [<ffffffff8130b329>] sr_lock_door+0x20/0x22
Jun 15 17:56:17 paragon kernel: [  455.553293]  [<ffffffff8132c579>] cdrom_release+0x195/0x205
Jun 15 17:56:17 paragon kernel: [  455.553298]  [<ffffffff8104127e>] ? should_resched+0xe/0x2d
Jun 15 17:56:17 paragon kernel: [  455.553302]  [<ffffffff81474228>] ? _cond_resched+0xe/0x22
Jun 15 17:56:17 paragon kernel: [  455.553307]  [<ffffffff8130a2bd>] sr_block_release+0x30/0x4d
Jun 15 17:56:17 paragon kernel: [  455.553311]  [<ffffffff81149c22>] __blkdev_put+0xc6/0x179
Jun 15 17:56:17 paragon kernel: [  455.553315]  [<ffffffff81149dd9>] blkdev_put+0x104/0x10c
Jun 15 17:56:17 paragon kernel: [  455.553319]  [<ffffffff811230e5>] kill_block_super+0x65/0x6a
Jun 15 17:56:17 paragon kernel: [  455.553324]  [<ffffffff81123321>] deactivate_locked_super+0x26/0x4b
Jun 15 17:56:17 paragon kernel: [  455.553329]  [<ffffffff81123e8a>] deactivate_super+0x37/0x3b
Jun 15 17:56:17 paragon kernel: [  455.553333]  [<ffffffff811387bc>] mntput_no_expire+0xcc/0xd1
Jun 15 17:56:17 paragon kernel: [  455.553337]  [<ffffffff811391f3>] sys_umount+0x2ac/0x2da
Jun 15 17:56:17 paragon kernel: [  455.553342]  [<ffffffff81009bc2>] system_call_fastpath+0x16/0x1b
Jun 15 17:56:17 paragon kernel: [  455.553344] Code: c8 2f 81 31 f6 e8 b8 94 ff ff eb 11 48 c7 c2 71 d6 2f 81 31 f6 48 89 df e8 ae 59 fe ff 41 5b 5b 5d c3 55 48 89 e5 0f 1f 44 00 00 <8b> 97 00 06 00 00 31 c0 83 fa 02 74 5d 8d 42 fc 83 f8 04 77 4c 
Jun 15 17:56:17 paragon kernel: [  455.553382] RIP  [<ffffffff812fd72d>] scsi_prep_state_check+0x9/0x75
Jun 15 17:56:17 paragon kernel: [  455.553386]  RSP <ffff88018c79f9e8>
Jun 15 17:56:17 paragon kernel: [  455.553389] CR2: 0000000000000600
Jun 15 17:56:17 paragon kernel: [  455.553392] ---[ end trace c9cbf46c98b4de77 ]---
Comment 1 Dave Jones 2011-07-11 19:37:50 UTC 
Please test this build.
http://koji.fedoraproject.org/koji/buildinfo?buildID=251810
Comment 2 Jurgen Kramer 2011-07-13 08:59:42 UTC 
I can confirm that the issue is fixed with kernel 2.6.38.8-35.fc15.x86_64. Unplugging the mounted CD-ROM drive now results in:

Jul 13 10:57:07 paragon kernel: [  469.116311] scsi 8:0:0:0: rejecting I/O to dead device