[PATCH 1/3] arm64: Don't use is_module_addr in setting page attributes
Laura Abbott
lauraa at codeaurora.org
Wed Feb 25 14:14:55 PST 2015
The set_memory_* functions currently only support module
addresses. The addresses are validated using is_module_addr.
That function is special though and relies on internal state
in the module subsystem to work properly. At the time of
module initialization and calling set_memory_*, it's too early
for is_module_addr to work properly so it always returns
false. Rather than be subject to the whims of the module state,
just bounds check against the module virtual address range.
Signed-off-by: Laura Abbott <lauraa at codeaurora.org>
---
arch/arm64/mm/pageattr.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c
index bb0ea94..1d3ec3d 100644
--- a/arch/arm64/mm/pageattr.c
+++ b/arch/arm64/mm/pageattr.c
@@ -51,7 +51,10 @@ static int change_memory_common(unsigned long addr, int numpages,
WARN_ON_ONCE(1);
}
- if (!is_module_address(start) || !is_module_address(end - 1))
+ if (start < MODULES_VADDR || start >= MODULES_END)
+ return -EINVAL;
+
+ if (end < MODULES_VADDR || end >= MODULES_END)
return -EINVAL;
data.set_mask = set_mask;
--
Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project
More information about the linux-arm-kernel
mailing list