Adrian Chadd wrote:
That seems to be dereferencing a mbuf pointer. I'll look into it.
What are you doing to trigger this condition again?
Adrian
Hello,
Well it is consistently reproductible : each time I issue a cvsup command.
The interesting point is that I can _download_ without any problem with
ftp (that is why sysinstall works) but if I start a ftpd on my host I
get (consistently) a similar crash :
# Kernel page fault with the following non-sleepable locks held:
exclusive sleep mutex xennetif_tx (network transmit lock) r = 0
(0xc39400a0) locked @
/home/adrian/work/freebsd/xen/svn/head/sys/dev/xen/netfront/netfront.c:1118
KDB: stack backtrace:
X_db_sym_numargs(c0360308,c3524ab8,c0111ac5,c0383ef6,45e,...) at
X_db_sym_numargs+0x146
kdb_backtrace(c0383ef6,45e,ffffffff,c0511c8c,c3524af0,...) at
kdb_backtrace+0x29
witness_display_spinlock(c036278d,c3524b04,4,1,0,...) at
witness_display_spinlock+0x75
witness_warn(5,0,c038c634,c3524b60,c,...) at witness_warn+0x1fd
trap(c3524b8c) at trap+0x13e
alltraps(c39400a0,0,c0383ef6,45e,d2cc5800,...) at alltraps+0x1b
xlvbd_add(c3940000,c3524cc8,c00c3814,c03d5d00,c3783638,...) at
xlvbd_add+0x32d0
intr_event_execute_handlers(c37097ec,c3783600,c0358a72,4e9,c3783670,...)
at intr_event_execute_handlers+0x125
intr_event_add_handler(c378a440,c3524d38,c03587a5,336,c37097ec,...)
at intr_event_add_handler+0x41f
fork_exit(c00afcd0,c378a440,c3524d38) at fork_exit+0xb8
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip = 0, esp = 0xc3524d70, ebp = 0 ---
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x2
fault code = supervisor read, page not present
instruction pointer = 0x21:0xc0300ad9
stack pointer = 0x29:0xc3524bcc
frame pointer = 0x29:0xc3524bfc
code segment = base 0x0, limit 0xf9800, type 0x1b
= DPL 1, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 12 (irq134: xn)
[thread pid 12 tid 100023 ]
Stopped at xlvbd_add+0x2039: cmpl $0,0(%edi)
db> bt
Tracing pid 12 tid 100023 td 0xc3784000
xlvbd_add(c39400a0,0,c0383ef6,45e,d2cc5800,...) at xlvbd_add+0x2039
xlvbd_add(c3940000,c3524cc8,c00c3814,c03d5d00,c3783638,...) at
xlvbd_add+0x32d0
intr_event_execute_handlers(c37097ec,c3783600,c0358a72,4e9,c3783670,...)
at intr_event_execute_handlers+0x125
intr_event_add_handler(c378a440,c3524d38,c03587a5,336,c37097ec,...)
at intr_event_add_handler+0x41f
fork_exit(c00afcd0,c378a440,c3524d38) at fork_exit+0xb8
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip = 0, esp = 0xc3524d70, ebp = 0 ---
db>
so the problem seems to come more from upload traffic than download ?
Hope it gives you some clues (I'm totally unable to help on this type of
problems, sorry, but will gladly issue any command you want and report
back).
Bruno
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