Panic in 5.4RC2

[Tom Jensen]

System info: FreeBSD bart.motd.dk 5.4-RC2 FreeBSD 5.4-RC2 #2: Fri Apr 15
21:14:30 CEST 2005 root at bart.motd.dk:/usr/obj/usr/src/sys/CUSTOM  i386

Got the following panic when trying to recover data from a crappy cd

I got at crash dump so please let me know if further info is needed.

- T
 
sgbufp = 0xc101cfe4
magic = 63062, size = 32740, r= 186528, w = 186977, ptr = 0xc1015000, cksum=
2196678
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x57c
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc06413bd
stack pointer           = 0x10:0xc9bbfc04
frame pointer           = 0x10:0xc9bbfc08
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 1 (init)

db> where
Tracing pid 1 tid 100002 td 0xc13df300
turnstile_setowner(c13d37c0,510) at turnstile_setowner+0xd
turnstile_wait(c13d37c0,c15ad230,510) at turnstile_wait+0xb7
_mtx_lock_sleep(c15ad230,c13df300,0,0,0) at _mtx_lock_sleep+0xad
kern_wait(c13df300,ffffffff,c9bbfc94,0,c9bbfc98) at kern_wait+0xfa
wait4(c13df300,c9bbfd14,4,f3,282) at wait4+0x1f
syscall(bfbf002f,bfbf002f,bfbf002f,bfbfef04,bfbfeef8) at syscall+0x27b
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (7, FreeBSD ELF32, wait4), eip = 0x8051e07, esp = 0xbfbfedcc,
ebp = 0xbfbfede8 ---