|Summary:||[panic] Kernel Panic when cleanly unmounting USB disk|
|Product:||Base System||Reporter:||Surer Dink <surerlistmail>|
|Component:||usb||Assignee:||freebsd-usb mailing list <usb>|
|Severity:||Affects Only Me|
Description Surer Dink 2006-03-24 07:30:16 UTC
> I have two USB hard drives attached through an "Adaptec" USB2 card. > The disks were working fine (although seemed a bit slow ~3MB/s random > reads/writes as reported by iostat while rsync was copying from one to > the other a complete freebsd install). The drives were left connected > to the machine unmounted. At some point the following appeared on the > console: > > umass1: Phase Error, residue = 32 > (da2:umass-sim1:1:0:0): AutoSense Failed > Opened disk da2 -> 5 > umass1: Invalid CSW: tag 2575 should be 2576 > > however I did not notice this message until later connecting to the > machine through ssh and trying to mount the _other_ disk (the disk on > da1). the kernel panic'ed; through remote kvm I was able to copy down > the following (which was below the CSW message): > > Fatal Trap 18: integer divide fault while in kernel mode > ... > current process = (...) mount > ... > > the instruction pointer was at 0xc081daab, which is: > > 0xc081da9f <__qdivrem+47>: mov $0x1,%edi > 0xc081daa4 <__qdivrem+52>: mov %edi,%eax > 0xc081daa6 <__qdivrem+54>: mov $0x0,%edx > 0xc081daab <__qdivrem+59>: div %ecx > 0xc081daad <__qdivrem+61>: mov %eax,0xffffffbc(%ebp) > 0xc081dab0 <__qdivrem+64>: mov %eax,0xffffffc0(%ebp) > 0xc081dab3 <__qdivrem+67>: cmpl $0x0,0x18(%ebp) > > usb1: OHCI version 1.0 > usb1: <NEC uPD 9210 USB controller> on ohci1 > usb1: USB revision 1.0 > uhub1: NEC OHCI root hub, class 9/0, rev 1.00/1.00, addr 1 > uhub1: 3 ports with 3 removable, self powered > ohci2: <NEC uPD 9210 USB controller> mem 0xfebfe000-0xfebfefff irq 23 > at device 1.1 on pci2 > ohci2: [GIANT-LOCKED] > usb2: OHCI version 1.0 > usb2: <NEC uPD 9210 USB controller> on ohci2 > usb2: USB revision 1.0 > uhub2: NEC OHCI root hub, class 9/0, rev 1.00/1.00, addr 1 > uhub2: 2 ports with 2 removable, self powered > ehci0: <NEC uPD 720100 USB 2.0 controller> mem 0xfebffc00-0xfebffcff > irq 16 at device 1.2 on pci2 > ehci0: [GIANT-LOCKED] > usb3: EHCI version 1.0 > usb3: companion controllers, 3 ports each: usb1 usb2 > usb3: <NEC uPD 720100 USB 2.0 controller> on ehci0 > usb3: USB revision 2.0 > uhub3: NEC EHCI root hub, class 9/0, rev 2.00/1.00, addr 1 > uhub3: 5 ports with 5 removable, self powered > umass0: vendor 0x0402 USB 2.0 Storage Device, rev 2.00/1.03, addr 2 > umass1: vendor 0x0402 USB 2.0 Storage Device, rev 2.00/1.03, addr 3 It appears the problem is reproduceable. Same instruction pointer/same integer divide fault; however this time current process is 2(g_event) and, above the panic, the console contains: g_vfs_done:da2s1a[READ(65536), length 8192)]error = 6 The messages prior to the panic frequently change, however the actual panic is definitely in the same place every time. Fix: nope, sorry. How-To-Repeat: hardware description is above - not sure if it's hardware specific, but that is likely. to repeat, the following procedure is sufficient for me: 1. mount two usb disks 2. rsync a bit (12GB) of data from one to the other 3. unmount either disk.
Comment 1 Eitan Adler 2017-12-31 07:59:15 UTC
For bugs matching the following criteria: Status: In Progress Changed: (is less than) 2014-06-01 Reset to default assignee and clear in-progress tags. Mail being skipped