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<DIV><FONT size=2>As i had written here before, sometimes bio which dispatched
to the dm's target, it's bi_size could exceed</FONT></DIV>
<DIV><FONT size=2>region size in dm-mirror.c, i also found similar problem in
dm-stripe.c and dm-snap.c , in such situation,</FONT></DIV>
<DIV><FONT size=2>bio's bi_size could exceed strip target's chunk size and snap
target's chunk size, but in current code, we</FONT></DIV>
<DIV><FONT size=2>never care about this. so in strip target we could read/write
bad position after <FONT size=3>stripe_map() function,</FONT></FONT></DIV>
<DIV>and cause same effect in dm-snap.c.</DIV>
<DIV>I think such bugs are very dangerous then kernel panic
or cracsh becasue it may destroy your data </DIV>
<DIV>in silence. we'd better to annonuce our linux users don't use thus
dm-targets before we correct it.</DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV>Sincerely,<BR>
Zhao Qian <<A href="">zhaoqian@aaastor.com</A>></DIV>
<DIV><FONT size=2></FONT> </DIV>
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