From: "lkml@tigusoft.pl" <lkml@tigusoft.pl>
To: linux-kernel@vger.kernel.org
Subject: bug? 3.2.43 hangs some tasks after network unplugged, maybe related to kvm
Date: Mon, 29 Apr 2013 13:26:48 +0200 [thread overview]
Message-ID: <kllldq$j61$1@ger.gmane.org> (raw)
Kernel: 3.2.43, with grsecurity security patch (with most options except
blocking kmem and ioport access) on 8 core amd cpu, 8 gb ram.
In tty1 I logged into root, then su into another user (uid=1001).
In bash, when I typed "dme" and pressed TAB to auto complete, it hanged.
Now the text cursor just blinks there, pressing anything line ctrl+C
does nothing. Going to tty2 and back works (but does not unhang the bash).
This bash process shows up as "S+" state in ps aux.
Attaching strace -p into it resulted in the strace hanging too, after
writting Process 4936 attached - interrupt to quit (ctrl+C does nothing).
A moment before the hang occured (2-3 seconds) the ethernet cable was
unplugged.
There where bridges (br, tun/tap) configured because there where kvm
machines running (one machine, kvm3) and few other where stopped.
Maybe that was related to recent 3.2.43 kvm exploits/corruptions in some
way.
The kernel has overall normal debian configuration, except it was
configured for lowest latency (low latency desktop) and afiar had more
HZ ticks (1000?).
reply other threads:[~2013-04-29 11:27 UTC|newest]
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