Superb Fast splice() Fix. [LWN.net]

Superb Fast splice() Fix.

Posted Feb 12, 2008 0:12 UTC (Tue) by brianomahoney (guest, #6206)
Parent article: Stable and unstable kernel releases

Let me thank Greg K-H and the stable team for their
timely work, it maintains the Very High standard of
professionalism that we have come to expect.

I smell a FUD campaign, there have been too many FOSS
exploits in the news in recent days so I hope:

(i)  Following Linus' and Andrew's comments we get more
     introspection/testing

(ii) PJ keeps an eye out

we are due for more anti-Linux reports.

Brian

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Superb Fast splice() Fix.

Posted Feb 12, 2008 12:24 UTC (Tue) by nowshining (guest, #50466) [Link] (1 responses)

the patch for 2.6.24.2 that I used didn't update the version number, it just stayed at
2.6.24.1 and i had to try re-patching a second time to get it to work, anyway my kernel
reports 2.6.24.1 and after patching and re-trying another compile - 2nd time, I re-tried the
exploit and it doesn't work no more. :) that means that the patch took..


nowshining@botnetgodalphamale:~/Desktop$ uname -r
2.6.24.1-botnetgodalphamale
nowshining@botnetgodalphamale:~/Desktop$ ./exploit
-----------------------------------
 Linux vmsplice Local Root Exploit
 By qaaz
-----------------------------------
[+] mmap: 0x0 .. 0x1000
[+] page: 0x0
[+] page: 0x20
[+] mmap: 0x4000 .. 0x5000
[+] page: 0x4000
[+] page: 0x4020
[+] mmap: 0x1000 .. 0x2000
[+] page: 0x1000
[+] mmap: 0xb7fb0000 .. 0xb7fe2000
[-] vmsplice: Bad address
nowshining@botnetgodalphamale:~/Desktop$


however the only problem I had was when compiling the kernel and I just re-tried (the exploit)
for fun and it pretty much made the system a pain to reboot, and i could NOT start or stop any
processes, so in the end I had to hard reboot, altho when i did try the exploit, programs did
open up, somewhat and operate fine but the compile stopped and cpu went to 0%, it was actually
only trying to exit the terminal that it became blank, and a new shell/terminal wouldn't load
properly, etc..

oh well :) > by the way I stayed up all night so my brain is a bit slow right now. ^_^, also
that was the first time I patched a kernel & compiled it successfully.

Superb Fast splice() Fix.

Posted Feb 12, 2008 12:26 UTC (Tue) by nowshining (guest, #50466) [Link]

oh and yes if anyone is wondering i used the patch from kernel.org.