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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 11:22:31 -0700 |
| commit | 377b26e45229ed74ecad3ff9a8677bf420d50328 (patch) | |
| tree | 17c99741028cb21f36519b56ade59bb4581a9b0c /arch/arm | |
| parent | c5944f7cd7c13d8be74d0a811a28e59510729c20 (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>
Diffstat (limited to 'arch/arm')
| -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 9d40c341e07..8ad75e99e20 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -393,6 +393,9 @@ 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); /* |