Messages in this thread | | | Date | Wed, 27 Jan 1999 06:01:00 -0500 (EST) | From | System Administrator <> | Subject | Re: 2.2.0 SECURITY |
| |
[admin@athena admin]$ cc -o try try.c [admin@athena admin]$ ./try Segmentation fault [admin@athena admin]$ ls -l core /usr/bin/color-ls: core: No such file or directory
ldd 1.9.9 libc 5.4.38 SMP not enabled
On Wed, 27 Jan 1999, Paul wrote:
> >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/ >
- 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/
| |