From: Stas Sergeev <stsp@aknet.ru>
To: Andi Kleen <ak@muc.de>
Cc: Linux kernel <linux-kernel@vger.kernel.org>
Subject: Re: Segfault on the i386 enter instruction
Date: Sun, 14 May 2006 21:56:18 +0400 [thread overview]
Message-ID: <44676F42.7080907@aknet.ru> (raw)
Hi.
Andi Kleen wrote:
> Handling it like you expect would require to disassemble
> the function in the page fault handler and it's probably not
> worth doing that for this weird case.
Just wondering, is this case really that weird?
In fact, the check against %esp that the kernel
does, looks strange. I realize that it can catch a
(very rare) user-space bug of accessing below %esp, but
other than that it looks redundant (IMHO) and as soon as
it triggers the false-positives, what is it really good for?
Aren't the rlimit and the other checks of acct_stack_growth()
not enough, or am I missing something obvious?
next reply other threads:[~2006-05-14 17:56 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-14 17:56 Stas Sergeev [this message]
2006-05-15 7:40 ` Segfault on the i386 enter instruction Andi Kleen
2006-05-15 17:15 ` Stas Sergeev
2006-05-15 18:44 ` Andi Kleen
2006-05-15 19:38 ` Stas Sergeev
2006-05-15 19:56 ` Lee Revell
2006-05-15 22:49 ` Ingo Oeser
2006-05-15 22:56 ` Lee Revell
-- strict thread matches above, loose matches on Subject: below --
2006-05-17 8:20 Chuck Ebbert
2006-05-16 2:29 Chuck Ebbert
2006-05-16 9:32 ` Andi Kleen
2006-05-12 13:16 Tomasz Malesinski
2006-05-12 13:47 ` Denis Vlasenko
2006-05-12 13:50 ` Andi Kleen
2006-05-12 14:03 ` Denis Vlasenko
2006-05-12 15:31 ` Tomasz Malesinski
2006-05-15 11:36 ` Bart Hartgers
2006-05-15 11:46 ` Andi Kleen
2006-05-15 13:36 ` linux-os (Dick Johnson)
2006-05-15 14:19 ` Bart Hartgers
2006-05-12 14:07 ` linux-os (Dick Johnson)
2006-05-12 14:20 ` Denis Vlasenko
2006-05-12 14:42 ` linux-os (Dick Johnson)
2006-05-12 14:53 ` Denis Vlasenko
2006-05-15 20:53 ` Bill Davidsen
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