From: Dimitri Torfs <dimitri@sonycom.com>
To: linux-mips@linux-mips.org
Subject: access_ok and CONFIG_MIPS32 for 2.6
Date: Fri, 2 Jan 2004 15:59:41 +0100 [thread overview]
Message-ID: <20040102145941.GA13426@sonycom.com> (raw)
Hi,
the mask used in access_ok to check the validity of an address range
evaluates to -TASK_SIZE for user processes. In case of
CONFIG_MIPS32, TASK_SIZE is defined as 0x7fff8000UL, so -TASK_SIZE
evaluates to 0x80008000, making access_ok return false for all
addresses with bit 15 and 31 set. Surely the mask should be 0x80000000.
Does anybody know why TASK_SIZE is set to 0x7fff8000 and not
0x80000000 ?
Dimitri
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next reply other threads:[~2004-01-02 14:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-02 14:59 Dimitri Torfs [this message]
2004-01-02 19:44 ` access_ok and CONFIG_MIPS32 for 2.6 Ralf Baechle
2004-01-04 12:05 ` Atsushi Nemoto
2004-01-04 21:03 ` Dimitri Torfs
2004-01-22 10:32 ` Atsushi Nemoto
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