TheGrebs.com:IRC Logs:#uml:2006:09:07

---	Log	opened Thu Sep 07 00:00:31 2006
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07:29	<jjkola>	I'm trying to trace a guest kernel but for some reason I'm getting this error message "attach: ptrace(PTRACE_ATTACH, ...): Operation not permitted"
07:29	<jjkola>	what should I do?
07:30	<mike_m>	are you using an selinux kernel?
07:30	<jjkola>	yes
07:30	<mike_m>	that's probably the reason
07:30	<jjkola>	but I have also tried it with selinux disabled
07:31	<jjkola>	or do I need to disabled selinux also in guest?
07:31	<mike_m>	i would guess only for the host
07:31	<jjkola>	well, I have passed selinux=0 to host when booting
07:32	[~]	mike_m has no experience with selinux
07:34	<jjkola>	when compiling kernel you have possibility to add support for selinux=0 to disable selinux temporarily
07:34	<mike_m>	are you sure it's turned off?
07:35	<jjkola>	I checked with make menuconfig that the support for selinux=0 was enabled and I did pass that parameter to host kernel
07:35	<jjkola>	other than that I haven't checked
07:36	<jjkola>	how can I check?
07:37	<jjkola>	I mean is there a way to check from running kernel that if selinux is enabled or disabled?
07:38	<mike_m>	dunno :/
07:44	<jjkola>	does it have affect if I have compiled selinux statically instead of module?
07:44	<mike_m>	dunno. i don't know much about selinux
07:45	<mike_m>	but ptrace permission denied sounds like an selinux thing
07:45	<jjkola>	ok
07:45	<mike_m>	i can't think of another reason that that ptrace wouldn't work
07:46	<jjkola>	hmm, looks like I have to spend some time rebuilding my kernel...
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09:06	<KiBo>	hi
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11:09	<jjkola>	hmm, still getting "attach: ptrace(PTRACE_ATTACH, ...): Operation not permitted" even though I compiled host kernel without SELinux support
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11:48	<alexbodn>	hallo all. i'm trying to substitute uml_switch by vde.but the guest complains the network is down :-(
11:48	<alexbodn>	any debugging hints?
11:50	<alexbodn>	the tap device is pingable on the host
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12:52	<jjkola>	any uml developer here?
12:52	<the_hydra>	not sure
12:53	<the_hydra>	just ask ..
12:55	<jjkola>	for some reason guest's network stack is eating SYN packets as I can see them with iptables log-target but they don't arrive at host's bridge
12:57	<the_hydra>	hmm
12:57	<the_hydra>	sure they are not "swallowed" by iptables?
12:58	<jjkola>	I don't think log target can swallow anything...
12:58	<jjkola>	as I didn't have any other rules and default is accept
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15:07	<jjkola>	I found the problem with the connection
15:09	<jjkola>	I had set up a prerouting rule which rerouted all port 80 connections which weren't from host to internal server and after modifying it so that it would only reroute for specific address all started to work smoothly
15:10	<jjkola>	how stupid of me : (
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15:20	<newbcoder>	for the x86_64 arch; there is the option of building 32bit support; how do I build it into the arch=um?
15:20	<newbcoder>	otherwise; I can not boot a system that is filled with 32 bit apps on a 64 bitmachine running uml
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15:50	<newbcoder>	i give up; back to using ms windows for me
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18:58	<alexbodn>	i have to re login
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19:30	<alexbodn>	hi all. i have switched from uml_switch to vde-switch, and everything seems to work :-)
20:08	<newbcoder>	for the x86_64 arch; there is the option of building 32bit support; how do I build it into the arch=um?
20:08	<newbcoder>	otherwise; I can not boot a system that is filled with 32 bit apps on a 64 bitmachine running uml
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---	Log	closed Fri Sep 08 00:00:53 2006