From: Markos Chandras <markos.chand...@imgtec.com>
mprotect() expects the first argument to be aligned to a page boundary.
Signed-off-by: Markos Chandras <markos.chand...@imgtec.com>
---
libpthread/nptl/allocatestack.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libpthread/nptl/allocatestack.c b/libpthread/nptl/allocatestack.c
index 9399c2a..3f0586d 100644
--- a/libpthread/nptl/allocatestack.c
+++ b/libpthread/nptl/allocatestack.c
@@ -645,7 +645,7 @@ allocate_stack (const struct pthread_attr *attr, struct
pthread **pdp,
prot) != 0)
goto mprot_error;
#elif defined _STACK_GROWS_UP
- if (mprotect ((char *) pd - pd->guardsize,
+ if (mprotect ((char *) (((uintptr_t) pd - pd->guardsize) &
~pagesize_m1),
pd->guardsize - guardsize, prot) != 0)
goto mprot_error;
#endif
--
1.8.1.2
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