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Message-Id: <20100701173212.785441106@clark.site> Date: Thu, 01 Jul 2010 10:31:37 -0700 From: Greg KH <gregkh@...e.de> To: linux-kernel@...r.kernel.org, stable@...nel.org Cc: stable-review@...nel.org, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk, Anfei Zhou <anfei.zhou@...il.com>, Russell King <rmk+kernel@....linux.org.uk> Subject: [patch 071/149] ARM: 6166/1: Proper prefetch abort handling on pre-ARMv6 2.6.32-stable review patch. If anyone has any objections, please let us know. ------------------ From: Anfei <anfei.zhou@...il.com> 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@...il.com> Signed-off-by: Russell King <rmk+kernel@....linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> --- arch/arm/mm/fault.c | 3 +++ 1 file changed, 3 insertions(+) --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -386,6 +386,9 @@ do_translation_fault(unsigned long addr, if (addr < TASK_SIZE) return do_page_fault(addr, fsr, regs); + if (user_mode(regs)) + goto bad_area; + index = pgd_index(addr); /* -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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