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| author | Anfei <anfei.zhou@gmail.com> | 2010-06-08 15:16:49 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-06-08 19:39:57 +0100 |
| commit | 5e27fb78df95e027723af2c90ecc9b4527ae59e9 (patch) | |
| tree | 4f91874c2d4b2beef198e9116a500a76e5751cff | |
| parent | 17ebba1fe4da4b5d62782be8743e0e8231812af9 (diff) | |
| download | linux-5e27fb78df95e027723af2c90ecc9b4527ae59e9.tar.gz linux-5e27fb78df95e027723af2c90ecc9b4527ae59e9.tar.bz2 linux-5e27fb78df95e027723af2c90ecc9b4527ae59e9.zip | |
ARM: 6166/1: Proper prefetch abort handling on pre-ARMv6
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>
| -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 92f5801f99c1..cbfb2edcf7d1 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); /* |