From 60c1fe7f456b1cd17c71ea6a9c4a234d9f147b7b Mon Sep 17 00:00:00 2001 From: Markos Chandras Date: Tue, 12 Feb 2013 13:44:25 +0000 Subject: nptl/allocatestack.c: Fix stack mprotect alignment for STACK_GROWS_UP mprotect() expects the first argument to be aligned to a page boundary. Signed-off-by: Markos Chandras Signed-off-by: Bernhard Reutner-Fischer --- libpthread/nptl/allocatestack.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'libpthread') diff --git a/libpthread/nptl/allocatestack.c b/libpthread/nptl/allocatestack.c index 9399c2a63..3f0586d28 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 -- cgit v1.2.3