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Date: Mon, 29 Apr 2013 13:26:48 +0200 From: "lkml@...usoft.pl" <lkml@...usoft.pl> To: linux-kernel@...r.kernel.org Subject: bug? 3.2.43 hangs some tasks after network unplugged, maybe related to kvm 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?). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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