compat: Fix sparse address space warnings
In compat_sys_old_getrlimit() we pass a kernel pointer to
sys_old_getrlimit() inside a set_fs() bracket. This is okay, so we
can safely cast the affected pointer to __user.
In compat_clock_nanosleep_restart(), the variable "rmtp" holds a user
pointer. Annotate it as such.
Both of these warnings are ancient, but were reported by Fengguang
Wu's test system due to other changes.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Toyo Abe <toyoa@mvista.com>
Link: http://lkml.kernel.org/n/tip-507h7cq5e45eg6ygtykon3bf@git.kernel.org
diff --git a/kernel/compat.c b/kernel/compat.c
index 3afc524..7076b57 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -451,7 +451,7 @@
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
- ret = sys_old_getrlimit(resource, &r);
+ ret = sys_old_getrlimit(resource, (struct rlimit __user *)&r);
set_fs(old_fs);
if (!ret) {
@@ -799,7 +799,7 @@
long err;
mm_segment_t oldfs;
struct timespec tu;
- struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp;
+ struct compat_timespec __user *rmtp = restart->nanosleep.compat_rmtp;
restart->nanosleep.rmtp = (struct timespec __user *) &tu;
oldfs = get_fs();
