Module Name: src
Committed By: jym
Date: Wed Aug 24 20:49:34 UTC 2011
Modified Files:
src/sys/arch/xen/xen: xbdback_xenbus.c
Log Message:
Protect xbdback(4) ring indexes from overflowing; leave the continuation
prematurely in case they do, to avoid looping "endlessly" (or at least
a very long time) at IPL_BIO while trying to handle requests.
This should not happen in a nominal scenario, but the ring can get
corrupted for whatever reason (memory errors, domU failures or
exploitation).
To generate a diff of this commit:
cvs rdiff -u -r1.45 -r1.46 src/sys/arch/xen/xen/xbdback_xenbus.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
