>Number:         12330
>Category:       kern
>Synopsis:       panic in filesystem code
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Mar 04 22:15:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     
>Release:        1.5 release branch from 2001/02/27
>Organization:
Matthias Scheler                                         http://core.de/~tron/
>Environment:
System: NetBSD colwyn.zhadum.de 1.5.1_ALPHA NetBSD 1.5.1_ALPHA (COLWYN) #0: Tue Feb 27 11:54:13 CET 2001 tron@colwyn.zhadum.de:/src/sys/compile/COLWYN i386


>Description:
During heavy disk activity - "make update" in "pkgsrc/graphics/png" - my
server crashed tonight with this panic:

reboot after panic: ffs_alloccg: map corrupted

Here is the stack trace from the crash dump:

#0  0x104 in ?? ()
#1  0xc02651bf in cpu_reboot ()
#2  0xc0156dd1 in panic ()
#3  0xc014a19a in lockmgr ()
#4  0xc017b1cf in genfs_lock ()
#5  0xc0178b03 in vn_lock ()
#6  0xc0171469 in vget ()
#7  0xc0246fda in ffs_sync ()
#8  0xc0173910 in sys_sync ()
#9  0xc01728b0 in vfs_shutdown ()
#10 0xc0265197 in cpu_reboot ()
#11 0xc0156dd1 in panic ()
#12 0xc023c4df in ffs_mapsearch ()
#13 0xc023aa1e in ffs_alloccgblk ()
#14 0xc023a2a1 in ffs_alloccg ()
#15 0xc0239d26 in ffs_hashalloc ()
#16 0xc0238e63 in ffs_alloc ()
#17 0xc023d021 in ffs_balloc ()
#18 0xc0247dd1 in ffs_write ()
#19 0xc01786d4 in vn_write ()
#20 0xc0159268 in dofilewrite ()
#21 0xc01591ca in sys_write ()
#22 0xc026966c in syscall ()
#23 0xc0100cbb in syscall1 ()
can not access 0xbfbfd194, invalid translation (invalid PDE)
can not access 0xbfbfd194, invalid translation (invalid PDE)
Cannot access memory at address 0xbfbfd194.

>How-To-Repeat:
I'm not sure how.

>Fix:
None provided.
>Release-Note:
>Audit-Trail:
>Unformatted: