kern/84135: ggatec destroy panics BETA-1

[Harald Schmalzbauer]

>Number:         84135
>Category:       kern
>Synopsis:       ggatec destroy panics BETA-1
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jul 26 17:40:19 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Harald Schmalzbauer
>Release:        FreeBSD 6.0-BETA1 i386
>Organization:
>Environment:
System: FreeBSD test3.flintsbach.schmalzbauer.de 6.0-BETA1 FreeBSD 6.0-BETA1 #0: Tue Jul 26 17:19:31 CEST 2005 root at test3.flintsbach.schmalzbauer.de:/usr/obj/CUV-LV/usr/src/sys/CUV-LV i386


	
>Description:
	Even if the ggate provider is not used, destroying it panics the system with debug options,
	without WITNESS and INVARIANTS no panic occur
>How-To-Repeat:
	ggatec create 10.10.10.2 /dev/ad2p1
	ggate0
	
test3:/#37: ggatec destroy -u 0
GEOM_GATE: Device ggate0 destroyed.


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0xdeadc0de
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc05d39d6
stack pointer           = 0x28:0xd5d79ad8
frame pointer           = 0x28:0xd5d79ad8
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         = 403 (ggatec)
[thread pid 403 tid 100079 ]
Stopped at      strlen+0x6:     cmpb    $0,0(%edx)
db> trace
Tracing pid 403 tid 100079 td 0xc1d23900
strlen(deadc0de,d5d79bc0,c1d2210c,c1d22000,19) at strlen+0x6
kvprintf(c0738f70,c0580440,d5d79bc0,a,d5d79c00) at kvprintf+0xba8
vsnprintf(c079e400,100,c0738f70,d5d79bfc,c1d23900) at vsnprintf+0x3d
panic(c0738f70,deadc0de,c0731b02,21d,c1d23900) at panic+0x10a
_mtx_lock_flags(c1f20038,0,c0731b02,21d,0) at _mtx_lock_flags+0x114
g_gate_ioctl(c19afa00,c0286d03,c1d1cdc0,3,c1d23900) at g_gate_ioctl+0x190
devfs_ioctl_f(c1d4b948,c0286d03,c1d1cdc0,c1954d00,c1d23900) at devfs_ioctl_f+0x74
ioctl(c1d23900,d5d79d04,c,16,3) at ioctl+0x118
syscall(3b,3b,3b,0,0) at syscall+0x135
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (54, FreeBSD ELF32, ioctl), eip = 0x 0xbfbde51c, ebp = 0xbfbde538 ---
db>
>Fix:

	


>Release-Note:
>Audit-Trail:
>Unformatted: