Messages in this thread |  | | | Date | Thu, 11 Sep 2003 05:55:07 +0100 | | From | viro@parcelfa ... | | Subject | Re: Local DoS on single_open? |
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On Thu, Sep 11, 2003 at 02:42:13PM +1000, Keith Owens wrote: > single_open() requires the kernel to kmalloc a buffer which lives until > the userspace caller closes the file. What prevents a malicious user > opening the same /proc entry multiple times, allocating lots of kmalloc > space and causing a local DoS?
Size of that buffer is limited. IOW, it's not different from opening e.g. a shitload of pipes or sockets. - 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/
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