Messages in this thread | | | From | "" <> | Subject | bug? 3.2.43 hangs some tasks after network unplugged, maybe related to kvm | Date | Mon, 29 Apr 2013 13:26:48 +0200 |
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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?).
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