Usually the last 5% of the diskspace on ext2 and ext3
filesystems are reserved for root. But I just realized
that they can be bypassed by redirecting the output
from a suid root program to a file.
This command will keep writing beyond the 95% limit:
while true ; do mount ; done >filename
This was tested on a 2.4.19-pre8-ac1 kernel. Does
this problem exist on all other kernels as well, and
how severe is this problem?
It might be better to only allow write() if the user
was also allowed to do that when open() was called.
-- Kasper Dupont -- der bruger for meget tid på usenet. For sending spam use mailto:razor-report@daimi.au.dk - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Tue May 14 2002 - 12:00:18 EST