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From: Linus Torvalds <>
To: Roland McGrath <>
Subject: Re: [PATCH] allow ptrace and /proc/PID/mem to read fixmap pages
Date: Sat, 26 Apr 2003 18:04:47 -0700 (PDT)	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Sat, 26 Apr 2003, Roland McGrath wrote:
> This patch is i386-specific and should probably be done another way, but
> it's what I am using now.  It works and is well-tested. 

It looks to me like it will cause NULL pointer dereferences if the user 
asks for something that is inside a pmd isn't mapped.

Maybe that won't happen for the FIXADDR range, but this is just not 
acceptable. We don't do code without error handling in the kernel.


      parent reply	other threads:[~2003-04-27  0:52 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-04-26 23:46 [PATCH] allow ptrace and /proc/PID/mem to read fixmap pages Roland McGrath
2003-04-26 23:59 ` Jamie Lokier
2003-04-27  1:04 ` Linus Torvalds [this message]

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