sparc64: Sign extend length arg to truncate syscalls when compat.
The first thing sys_truncate() and sys_ftruncate() do is sign extend
the unsigned length arg to a signed type.
Thanks to Benjamin Herrenschmidt for the tip.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/kernel/sys32.S b/arch/sparc/kernel/sys32.S
index f061c4d..577f8fa 100644
--- a/arch/sparc/kernel/sys32.S
+++ b/arch/sparc/kernel/sys32.S
@@ -138,6 +138,8 @@
SIGN2(sys32_sync_file_range, compat_sync_file_range, %o0, %o5)
SIGN2(sys32_tee, sys_tee, %o0, %o1)
SIGN1(sys32_vmsplice, compat_sys_vmsplice, %o0)
+SIGN1(sys32_truncate, sys_truncate, %o1)
+SIGN1(sys32_ftruncate, sys_ftruncate, %o1)
.globl sys32_mmap2
sys32_mmap2: