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| author | Anfei <anfei.zhou@gmail.com> | 2010-06-08 15:16:49 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-07-05 11:10:51 -0700 |
| commit | 39be45ee5ca20b54cdcf74c77933acc3f560ed7c (patch) | |
| tree | 28cec73b9cbb119930d3385aba96ff16f3db3b93 | |
| parent | 12a5a0e39bc503ccbbf68e697d06397cba2afc79 (diff) | |
ARM: 6166/1: Proper prefetch abort handling on pre-ARMv6
commit 5e27fb78df95e027723af2c90ecc9b4527ae59e9 upstream.
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.
Signed-off-by: Anfei Zhou <anfei.zhou@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | arch/arm/mm/fault.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index 10e06801afb3..3191cd659347 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -386,6 +386,9 @@ do_translation_fault(unsigned long addr, unsigned int fsr, if (addr < TASK_SIZE) return do_page_fault(addr, fsr, regs); + if (user_mode(regs)) + goto bad_area; + index = pgd_index(addr); /* |