Weird problem with 2.4.4-pre6

From: Tobias Ringstrom (
Date: Wed Apr 25 2001 - 01:59:44 EST

Yesterday, I was running tcpdump, paging the output with less. All of a
sudden, less started to dump core (SIGSEGV). I could not even start less
by itself:

> less

without it getting a SIGSEGV, and in fact no user could run less without
getting a SIGSEGV, but it did work perfectly a few minutes earlier. This
morning, I tried to run less again, and now it was working! No core

How can this happen? Something overwriting the page/buffer cache?
Unfortunately, I don't know how to reproduce it. I'm writing this because
it was so strange that I felt I had to share it. There are no messages in
the (dmesg) log.

/Tobias, a little bit worried

Semi-random info:

00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
00:07.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II] (rev 01)
00:07.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
00:07.2 USB Controller: Intel Corporation 82371SB PIIX3 USB [Natoma/Triton II] (rev 01)
00:0b.0 VGA compatible controller: ATI Technologies Inc 210888GX [Mach64 GX] (rev 01)
00:0f.0 Ethernet controller: Davicom Semiconductor, Inc. Ethernet 100/10 MBit (rev 31)
00:11.0 Ethernet controller: 3Com Corporation 3c905C-TX [Fast Etherlink] (rev 74)

hda is running with DMA enabled in mdma2 mode.

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This archive was generated by hypermail 2b29 : Mon Apr 30 2001 - 21:00:13 EST