Re: [PATCH] 2.4.19-pre8 vm86 smp locking fix

Kasper Dupont (
Thu, 23 May 2002 23:36:23 +0200

Benjamin LaHaise wrote:
> arch/i386/kernel/vm86.c performs page table operations without obtaining
> any locks. This patch obtains page_table_lock around the the table walk
> and modification.

This patch can also be applied against 2.4.19-pre8-ac5.
The patch command does report:
patching file arch/i386/kernel/vm86.c
Hunk #1 succeeded at 124 (offset 27 lines).

Since this missing lock is completely unrelated to the
other bugfixes in vm86 I don't expect any bad interactions.

The pagetable access in arch/i386/kernel/vm86.c is related
to another access in arch/i386/mm/fault.c. Did anybody
verify that the other file does correct locking?

Kasper Dupont -- der bruger for meget tid på usenet.
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