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Linux kernel oops is invoked when the kernel detects an erroneous state inside itself. It kills an offending process and allows Linux to continue its operation under a compromised reliability. The authors investigate how reliable Linux is after a kernel oops in this paper. To investigate the reliability after a kernel oops, they analyze the scope of error propagation through an experimental campaign of fault injection in Linux 2.6.38. The error propagation scope is process-local if an error is confined in the process context that activated it, while the scope is kernel-global if an error propagates to other processes' contexts or global data structures. If the scope is process-local, Linux can be reliable even after a kernel oops.
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