*Very* weird behavior from 2.2.14
My machine is/has:
Quoted 3 lines
Linux 2.2.14
Red Hat 6.2
Two PII 400 Mhz processors, but the kernel doesn't currently have SMP
support compiled in
Quoted 6 lines
256 MB RAM
Two ethernet cards using PCI NE2000 (ne2k-pci.c), vpre-1.00e 5/27/99 One SCSI hard drive (boot, using aic7xxx.o), and four IDE drives. Uptime of 93 days
eth0 is network connection using DHCP (dhcpcd)
eth1 is 100 MBPS LAN as address 192.168.1.1
Weird behavior is as follows:
1) When I ping other machines on the LAN from the linux machine, I get unpredictable behavior.
Sometimes ping shows nothing, yet watching tcpdump and the hub between the machines, it is
clear that the ICMPs are being sent and responded to accordingly in under 10 ms, but ping displays
nothing except for, at random intervals, a single response with a normal or abnormally high time.
2) When I ping the machine's own IP (192.168.1.1), there is no network activity as normal, but the
results reported are random. Sometimes there will be 100% packet loss, but sometimes it will work
fine with intermitted periods of high ping times (going from 0.0 ms to 9000 ms). Strangely enough,
even when the machine can't ping itself, from other computers on the LAN, it will respond fine.
3) I run samba to serve files to a windows machine on my LAN (192.168.1.70), and file transfer
between them has suddenly become very slow. It was not like this before. I watch tcpdump from
the linux machine and see the netbios packets happening at a slow rate, sometimes stalling. When I
am streaming something like an mp3, the interrupts can last for 5 to 10 seconds and cause the mp3
to stop playing. This has never been this way before. It can even sometimes cut out completely. This
is the first strange behavior I noticed after coming back from a week vacation, while the machine was left
on.
4) This may or may not be related, but when I look up man-pages from tty1 as any user, certain text,
such as variables names of C functions, do not show up on the screen. This only happens on tty1.
They are perfectly fine on other terminals. I've tried "reset" to no success.
Notes:
1) Attached are several pieces of log/program output to assist in debugging.
2)
The follow messages may or not be related. These types of messages have been appearing in the
kernel ring buffer (dmesg) for some time but I have never paid attention to it (nor do I know what it means):
eth0: bogus packet: status=0x80 nxpg=0x57 size=1438
eth0: bogus packet: status=0x80 nxpg=0x58 size=1518
3) It has occured to me this may be due to outside attackers, but I have found no evidence to
suggest this.
Regards and thanks,
Para-dox ([email protected])
Quoted 2 lines · On Mon, 15 Jan 2001, paradox3 wrote:
My machine is/has:
Quoted 1 line
Linux 2.2.14
Go update. 2.2.14 and 2.2.15 (and some older 2.2.x possibly as well) have severe security problems. 2.2.18 is current.
Signature · 5 lines
Matthias Andree - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] Please read the FAQ at http://www.tux.org/lkml/