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ARM: 6166/1: Proper prefetch abort handling on pre-ARMv6

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Instruction faults on pre-ARMv6 CPUs are interpreted as
a 'translation fault', but do_translation_fault doesn't
handle well if user mode trying to run instruction above
TASK_SIZE, and result in the infinite retry of that
instruction.

CC: <stable@kernel.org>
Signed-off-by: Anfei Zhou <anfei.zhou@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Anfei
2010-06-08 15:16:49 +01:00
committed by Russell King
parent 17ebba1fe4
commit 5e27fb78df
1 changed files with 3 additions and 0 deletions
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3
arch/arm/mm/fault.c
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@@ -393,6 +393,9 @@ do_translation_fault(unsigned long addr, unsigned int fsr,
if (addr < TASK_SIZE) if (addr < TASK_SIZE)
return do_page_fault(addr, fsr, regs); return do_page_fault(addr, fsr, regs);
if (user_mode(regs))
goto bad_area;
index = pgd_index(addr); index = pgd_index(addr);
/* /*