Fatal trap 12: page fault while in kernel mode (FUSE related?)

Alexey Dokuchaev danfe at nsu.ru
Tue Oct 29 10:23:14 UTC 2013


Hi again,

I was running out of space on my UFS partition and decided to use big NTFS
one I also have on the drive.  I've mounted it with ntfs-3g and our native
fuse.ko.  I needed the scratch space to built Open/LibreOffice on it *LOL*.
Well, it failed with a panic (see the excerpt from text core at the end of
this email; full debug info is available upon request).

This is on fresh 11-CURRENT, i386.

./danfe

Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address	= 0x64
fault code		= supervisor read, page not present
instruction pointer	= 0x20:0xcae6adb6
stack pointer	        = 0x28:0xf0ac29a0
frame pointer	        = 0x28:0xf0ac2a0c
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, def32 1, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 14116 (conftest)
trap number		= 12
panic: page fault
cpuid = 1
KDB: stack backtrace:
#0 0xc0aed942 at kdb_backtrace+0x52
#1 0xc0ab37e1 at panic+0x121
#2 0xc0f8df09 at trap_fatal+0x339
#3 0xc0f8e23d at trap_pfault+0x31d
#4 0xc0f8d819 at trap+0x519
#5 0xc0f776ec at calltrap+0x6
#6 0xc0fb2864 at VOP_CREATE_APV+0x94
#7 0xc0b355ab at uipc_bindat+0x36b
#8 0xc0b33307 at uipc_bind+0x27
#9 0xc0b2c277 at kern_bindat+0x147
#10 0xc0b2c064 at sys_bind+0x74
#11 0xc0f8e939 at syscall+0x479
#12 0xc0f77781 at Xint0x80_syscall+0x21
Uptime: 1d23h57m34s
Physical memory: 2027 MB
<...>
(kgdb) #0  doadump (textdump=-961984384) at pcpu.h:233
#1  0xc0ab3459 in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:447
#2  0xc0ab381f in panic (fmt=<value optimized out>)
    at /usr/src/sys/kern/kern_shutdown.c:754
#3  0xc0f8df09 in trap_fatal (frame=<value optimized out>, eva=100)
    at /usr/src/sys/i386/i386/trap.c:1047
#4  0xc0f8e23d in trap_pfault (frame=0x0, usermode=<value optimized out>, 
    eva=0) at /usr/src/sys/i386/i386/trap.c:859
#5  0xc0f8d819 in trap (frame=0xf0ac2960) at /usr/src/sys/i386/i386/trap.c:556
#6  0xc0f776ec in calltrap () at /usr/src/sys/i386/i386/exception.s:170
#7  0xcae6adb6 in fuse_vnop_create (ap=0x0)
    at /usr/src/sys/modules/fuse/../../fs/fuse/fuse_vnops.c:368
#8  0xc0fb2864 in VOP_CREATE_APV (vop=<value optimized out>, a=0xf0ac2b88)
    at vnode_if.c:265
#9  0xc0b355ab in uipc_bindat (so=0xf0ac2b20, nam=<value optimized out>, 
    td=<value optimized out>) at vnode_if.h:109
#10 0xc0b33307 in uipc_bind (so=0xc80ab9f0, nam=0xc8580e80, td=0xce271620)
    at /usr/src/sys/kern/uipc_usrreq.c:573
#11 0xc0b2c277 in kern_bindat (td=0xce271620, dirfd=<value optimized out>, 
    fd=<value optimized out>, sa=0xce271620)
    at /usr/src/sys/kern/uipc_syscalls.c:283
#12 0xc0b2c064 in sys_bind (td=0x0, uap=<value optimized out>)
    at /usr/src/sys/kern/uipc_syscalls.c:297
#13 0xc0f8e939 in syscall (frame=<value optimized out>) at subr_syscall.c:134
#14 0xc0f77781 in Xint0x80_syscall ()
    at /usr/src/sys/i386/i386/exception.s:270
#15 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
Current language:  auto; currently minimal
(kgdb) 


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