Messages in this thread | | | Date | Wed, 27 Jan 1999 01:20:17 -0800 (PST) | From | Paul <> | Subject | Re: 2.2.0 SECURITY |
| |
>There is a bug that works only on the 2.2.0 kernel that will allow root >and non-root users to crash the machine (the system reboots). > >To replicate this bug do following: > >Take any core file, and as normal user or root run: ldd core > >The machine will reboot, saying that it cannot get execution permissions >for ./core > >As far as I can tell, this problem only affects x86 machines running >2.2.0. I know that PPC is not affected. > >Note: This problem does not occur in kernels before 2.2.0, and is >apparently fixed in 2.2.0ac1. > >Thanks to Gennady Gurov (gurov@frii.com) for discovering this problem.
Occured here: Ppro 200, 48mb RAM, Matrox fb, Soundblaster 16, smbfs, IP-masq, using egcs 1.1, ide-scsi, rest is pretty vanilla
Both on 2.2.0 AND 2.2.0-final
ldd is from Glibc-2.0.108 (also compiled with egcs 1.1)
core was from program: main() { * (int *) 0 = 0; }
core perms were 600
Note, my machine hung hard, with no reboot. Error message given: free_one_pmd: bad directory entry 000001e3
Paul Laufer
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |