Re: Security question: "Text file busy" overwriting executables but not shared libraries?

From: George Greer (greerga@m-l.org)
Date: Thu Oct 04 2001 - 01:50:24 EST

Next message: Ingo Molnar: "Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5"
Previous message: Ben Greear: "Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5"
In reply to: Linus Torvalds: "Re: Security question: "Text file busy" overwriting executables but not shared libraries?"
Next in thread: John Levon: "Re: Security question: "Text file busy" overwriting executables but not shared libraries?"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

On Thu, 4 Oct 2001, Linus Torvalds wrote:

>Which is why the kernel only allows it when the binary loader itself
>sets the flag, because security-conscious application writers are
>already aware of the "oh, a running binary may not be writable" issues.

One of the methods I tried to use to stop a fork()-bomb was to zero the
executable in question to force it to crash. No such luck, reboot it was.
Not that I can think of any other useful application of said behavior.

-- George Greer, greerga@m-l.org http://www.m-l.org/~greerga/

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/

Next message: Ingo Molnar: "Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5"
Previous message: Ben Greear: "Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5"
In reply to: Linus Torvalds: "Re: Security question: "Text file busy" overwriting executables but not shared libraries?"
Next in thread: John Levon: "Re: Security question: "Text file busy" overwriting executables but not shared libraries?"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Sun Oct 07 2001 - 21:00:31 EST