linux-kernel - Processes hang in an unkillable state

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Message-ID: <BANLkTin3gtiBk8nvsWEiJetKHq2+9HTi4w@mail.gmail.com>
Date:	Tue, 12 Apr 2011 12:32:38 +0200
From:	Robert Święcki <robert@...ecki.net>
To:	linux-kernel@...r.kernel.org
Subject: Processes hang in an unkillable state

Hi, while fuzzing Linux system calls (32bit fuzzer, 64bi linux
kernel), it happens after some time (10-20mins) that some processes
enter a state which makes them un-killable. They are either in R or D
state.

# strace ps wwuax
...
...
open("/proc/450/cmdline", O_RDONLY)     = 6
read(6,  -             hangs....

# kill -9 450
# kill -9 450 (no ESRCH)

More data in the attachment - I'll keep it in the kdb session for
further examination.

-- 
Robert Święcki

View attachment "450.txt" of type "text/plain" (9154 bytes)