Re: Is this a known issue?

Larry Rosenman wrote:
> Got this lovely textdump tonight with -CURRENT from earlier today:
> Fatal trap 12: page fault while in kernel mode
> cpuid = 1; apic id = 01
> fault virtual address   = 0x318
> fault code              = supervisor read data, page not present
> instruction pointer     = 0x20:0xffffffff803200fe
> stack pointer           = 0x28:0xffffff81d22105f0
> frame pointer           = 0x28:0xffffff81d2210610
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 1611 (bacula-fd)
> trap number             = 12
> panic: page fault
> cpuid = 1
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
> panic() at panic+0x182
> trap_fatal() at trap_fatal+0x2ad
> trap_pfault() at trap_pfault+0x294
> trap() at trap+0x187
> calltrap() at calltrap+0x8
> --- trap 0xc, rip = 0xffffffff803200fe, rsp = 0xffffff81d22105f0, rbp =
> 0xffffff81d2210610 ---
> _mtx_lock_sleep() at _mtx_lock_sleep+0x4e
> netisr_queue_internal() at netisr_queue_internal+0xe1
> netisr_queue_src() at netisr_queue_src+0x3c
> if_simloop() at if_simloop+0xb6
> looutput() at looutput+0x84
> ip_output() at ip_output+0xb88
> tcp_output() at tcp_output+0xac9
> tcp_usr_send() at tcp_usr_send+0x3a4
> sosend_generic() at sosend_generic+0x3f6
> soo_write() at soo_write+0x37
> dofilewrite() at dofilewrite+0x85
> kern_writev() at kern_writev+0x60
> write() at write+0x55
> syscall() at syscall+0x246
> Xfast_syscall() at Xfast_syscall+0xe1
> --- syscall (4, FreeBSD ELF64, write), rip = 0x801a0ff9c, rsp =
> 0x7fffff9fd2b8, rbp = 0x801d44e28 ---
> Uptime: 6m22s
> #
> 
> Is this a known issue?
> 
> Also, it appears it had just reset without trace (the 6m22s uptime is
> telltale).

Currently being investigated. See "ppp triggers GPF panic" and "Re: 
r194546 amd64: kernel panic in tcp_sack.c" for other threads on 
freebsd-current_at_ that likely are the same panic (not confirmed yet 
though as we only have access to Kamigishi's crash dumps so far).

Do you have a crash dump?

Cheers,
Lawrence