Panic with recent uipc changes?

Munehiro Matsuda haro at h4.dion.ne.jp
Wed Jul 26 18:46:42 UTC 2006


Hi Robert Watson,

From: Robert Watson <rwatson - FreeBSD.org>
Date: Wed, 26 Jul 2006 19:13:34 +0100 (BST)
::
::On Thu, 27 Jul 2006, Munehiro Matsuda wrote:
::
::> Hi Robert Watson,
::>
::> Recent changes to uipc, the UNIX domain sockets, seems to cause my -current 
::> laptop to panic and reboot whenever I stop emacs.
::>
::> Is there anything I can do to help debug this?
::
::I think that the information you attached is sufficient.  Could you try 
::removing the call to soisdisconnected() in uipc_detach()?  It should now occur 
::in the close path.  Patch attached.

Thank you for your very quick reply.
The patch worked. 

::Robert N M Watson
::Computer Laboratory
::University of Cambridge

Thank you,
  Haro
=------------------------------------------------------------------------------
           _ _    Munehiro (haro) Matsuda
 -|- /_\  |_|_|   Internet Solution Dept., KGT Inc.
 /|\ |_|  |_|_|   2-8-8 Shinjuku Shinjuku-ku Tokyo 160-0022, Japan
                  Tel: +81-3-3225-0767  Fax: +81-3-3225-0740


::
::>
::> =--------------------------------------------------------------------------
::> kdb_backtrace(2,c378569c,c,c3488d80,de34fa10,...) at kdb_backtrace+0x29
::> witness_warn(5,0,c07208c5) at witness_warn+0x192
::> trap(c07b0008,28,c06f0028,c357c9dc,c357c914,...) at trap+0x108
::> calltrap() at calltrap+0x5
::> --- trap 0xc, eip = 0xc050fc8e, esp = 0xde34fa58, ebp = 0xde34fa58 ---
::> knlist_mtx_locked(0) at knlist_mtx_locked+0x6
::> knote(c357c9dc,0,1,c357c9f4,c357c914,...) at knote+0x1d
::> sowakeup(c357c914,c357c9d0) at sowakeup+0x61
::> soisdisconnected(c357c914,c357c9f4,c357c914,0,de34fad4,...) at soisdisconnected+0xdc
::> uipc_detach(c357c914) at uipc_detach+0xe3
::> sofree(c357c914) at sofree+0x27b
::> soclose(c357c914) at soclose+0x2d9
::> soo_close(c359eb88,c3488d80) at soo_close+0x4b
::> fdrop_locked(c359eb88,c3488d80,c2dfa220,0,c06f91cb,...) at fdrop_locked+0x88
::> fdrop(c359eb88,c3488d80,6b5,c0777974,0,...) at fdrop+0x24
::> closef(c359eb88,c3488d80) at closef+0x367
::> fdfree(c3488d80) at fdfree+0x4a3
::> exit1(c3488d80,0,de34fd30,c06b8cea,c3488d80,...) at exit1+0x420
::> exit1(c3488d80,de34fd04) at exit1
::> syscall(58de003b,827003b,bfbf003b,bfbfdce0,bfbfdce0,...) at syscall+0x27e
::> Xint0x80_syscall() at Xint0x80_syscall+0x1f
::> --- syscall (1, FreeBSD ELF32, sys_exit), eip = 0x284da41b, esp = 0xbfbfdc7c, ebp = 0xbfbfdc98 ---
::>
::>
::> Fatal trap 12: page fault while in kernel mode
::> cpuid = 0; apic id = 00
::> fault virtual address	= 0x10
::> fault code		= supervisor read, page not present
::> instruction pointer	= 0x20:0xc050fc8e
::> stack pointer	        = 0x28:0xde34fa58
::> frame pointer	        = 0x28:0xde34fa58
::> 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		= 39065 (emacs)
::> trap number		= 12
::> panic: page fault
::> cpuid = 0
::> KDB: enter: panic
::> =--------------------------------------------------------------------------
::>
::>
::> Thanks in advance,
::> Haro
::> =------------------------------------------------------------------------------
::>           _ _    Munehiro (haro) Matsuda
::> -|- /_\  |_|_|   Internet Solution Dept., KGT Inc.
::> /|\ |_|  |_|_|   2-8-8 Shinjuku Shinjuku-ku Tokyo 160-0022, Japan
::>                  Tel: +81-3-3225-0767  Fax: +81-3-3225-0740


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