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@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
---
arch/tile/kernel/compat_signal.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c
index 8c5abf2e4794..bca13054afb4 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:
@@ -110,7 +109,6 @@ 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;
@@ -121,8 +119,7 @@ int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from)
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;
}
--
2.1.2
--
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