Bug #2300

Updated by tuxillo over 2 years ago


When unloading ehci module, after few seconds of activity I get this panic:

Fatal trap 12: page fault while in kernel mode

cpuid = 1; lapic->id = 01000000

fault virtual address = 0x48

fault code = supervisor read data, page not present

instruction pointer = 0x8:0xffffffff806ce788

stack pointer = 0x10:0xffffffe0a36aa870

frame pointer = 0x10:0xffffffe0a36aa908

code segment = base 0x0, limit 0xfffff, type 0x1b

= DPL 0, pres 1, long 0, def32 0, gran 1

processor eflags = interrupt enabled, resume, IOPL = 0

current process = 680

current thread = pri 6

trap number = 12

panic: page fault

cpuid = 1


(kgdb) bt

#0 _get_mycpu () at ./machine/thread.h:69

#1 md_dumpsys (di=<optimized out>) at /usr/src/sys/platform/pc64/x86_64/dump_machdep.c:263

#2 0xffffffff80499ea5 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:925

#3 0xffffffff8049a50b in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:387

#4 0xffffffff8049a7c2 in panic (fmt=0xffffffff807a86cb "%s") at /usr/src/sys/kern/kern_shutdown.c:831

#5 0xffffffff807598d4 in trap_fatal (frame=0xffffffe0a36aa7b8, eva=<optimized out>)

at /usr/src/sys/platform/pc64/x86_64/trap.c:1018

#6 0xffffffff80759ae1 in trap_pfault (frame=0xffffffe0a36aa7b8, usermode=0)

at /usr/src/sys/platform/pc64/x86_64/trap.c:912

#7 0xffffffff8075a0b5 in trap (frame=0xffffffe0a36aa7b8) at /usr/src/sys/platform/pc64/x86_64/trap.c:617

#8 0xffffffff80743fdf in calltrap () at /usr/src/sys/platform/pc64/x86_64/exception.S:188

#9 0xffffffff806ce788 in usbioctl (ap=0xffffffe0a36aa918) at /usr/src/sys/bus/usb/usb.c:614

#10 0xffffffff8047bf3c in dev_dioctl (dev=0xffffffe07dede490, cmd=<optimized out>, data=<optimized out>,

fflag=<optimized out>, cred=<optimized out>, msg=<optimized out>) at /usr/src/sys/kern/kern_device.c:243

#11 0xffffffff80665ac1 in devfs_fo_ioctl (fp=0xffffffe07df2b0d8, com=536892675, data=<optimized out>,

ucred=<optimized out>, msg=<optimized out>) at /usr/src/sys/vfs/devfs/devfs_vnops.c:1449

#12 0xffffffff804cb26e in fo_ioctl (fp=0xffffffe07df2b0d8, com=536892675,

data=0xffffffe0a36aaa58 "p\367\377\377\377\177", cred=0xffffffe00e2c7260, msg=0xffffffe0a36aab68)

at /usr/src/sys/sys/file2.h:88

#13 0xffffffff804cb725 in mapped_ioctl (fd=<optimized out>, com=536892675, uspc_data=<optimized out>,

map=<optimized out>, msg=<optimized out>) at /usr/src/sys/kern/sys_generic.c:733

#14 0xffffffff804cb7be in sys_ioctl (uap=0xffffffe00e2c7260) at /usr/src/sys/kern/sys_generic.c:552

#15 0xffffffff8075a891 in syscall2 (frame=0xffffffe0a36aac18) at /usr/src/sys/platform/pc64/x86_64/trap.c:1231

#16 0xffffffff8074422b in Xfast_syscall () at /usr/src/sys/platform/pc64/x86_64/exception.S:323

#17 0x000000000000002b in ?? ()

Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Core available upon request. Also, if someone is experiencing this too please add your findings to this ticket.


Antonio Huete