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authorChris Metcalf <cmetcalf@ezchip.com>2015-03-16 22:04:05 +0300
committerChris Metcalf <cmetcalf@ezchip.com>2015-04-17 19:56:42 +0300
commit89067c2daf3d9e0ce51c768589e79e845e6fda42 (patch)
tree52b2205fecc3f751b85c4d232330adc9367fd50c /arch/tile
parentc517d838eb7d07bbe9507871fab3931deccff539 (diff)
downloadlinux-89067c2daf3d9e0ce51c768589e79e845e6fda42.tar.xz
tile: use si_int instead of si_ptr for compat_siginfo
To be compatible with the generic get_compat_sigevent(), the copy_siginfo_to_user32() and thus copy_siginfo_from_user32() have to use si_int instead of si_ptr. Using si_ptr means that for the case of ILP32 compat code running in big-endian mode, we would end up copying the high 32 bits of the pointer value into si_int instead of the desired low 32 bits. Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com> Cc: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/tile')
-rw-r--r--arch/tile/kernel/compat_signal.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c
index 8c5abf2e4794..c52e6fd3c438 100644
--- a/arch/tile/kernel/compat_signal.c
+++ b/arch/tile/kernel/compat_signal.c
@@ -68,7 +68,7 @@ int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *fr
if (from->si_code < 0) {
err |= __put_user(from->si_pid, &to->si_pid);
err |= __put_user(from->si_uid, &to->si_uid);
- err |= __put_user(ptr_to_compat(from->si_ptr), &to->si_ptr);
+ err |= __put_user(from->si_int, &to->si_int);
} else {
/*
* First 32bits of unions are always present:
@@ -93,8 +93,7 @@ int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *fr
break;
case __SI_TIMER >> 16:
err |= __put_user(from->si_overrun, &to->si_overrun);
- err |= __put_user(ptr_to_compat(from->si_ptr),
- &to->si_ptr);
+ err |= __put_user(from->si_int, &to->si_int);
break;
/* This is not generated by the kernel as of now. */
case __SI_RT >> 16:
@@ -110,19 +109,19 @@ int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *fr
int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from)
{
int err;
- u32 ptr32;
if (!access_ok(VERIFY_READ, from, sizeof(struct compat_siginfo)))
return -EFAULT;
+ memset(to, 0, sizeof(*to));
+
err = __get_user(to->si_signo, &from->si_signo);
err |= __get_user(to->si_errno, &from->si_errno);
err |= __get_user(to->si_code, &from->si_code);
err |= __get_user(to->si_pid, &from->si_pid);
err |= __get_user(to->si_uid, &from->si_uid);
- err |= __get_user(ptr32, &from->si_ptr);
- to->si_ptr = compat_ptr(ptr32);
+ err |= __get_user(to->si_int, &from->si_int);
return err;
}