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signal: fix information leak in copy_siginfo_from_user32
[firefly-linux-kernel-4.4.55.git]
/
arch
/
arm64
/
kernel
/
signal32.c
diff --git
a/arch/arm64/kernel/signal32.c
b/arch/arm64/kernel/signal32.c
index 1670f15ef69e34972986081deb9b1f87b0bb2bb3..81fd38f4fbaaf1b9ef340aee5d1e2d8de9fa7d60 100644
(file)
--- a/
arch/arm64/kernel/signal32.c
+++ b/
arch/arm64/kernel/signal32.c
@@
-201,8
+201,6
@@
int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from)
int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
{
- memset(to, 0, sizeof *to);
-
if (copy_from_user(to, from, __ARCH_SI_PREAMBLE_SIZE) ||
copy_from_user(to->_sifields._pad,
from->_sifields._pad, SI_PAD_SIZE))