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authorDmitry V. Levin <ldv@altlinux.org>2017-08-22 02:16:43 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2017-09-20 00:55:57 +0300
commit176826af03666758c656dd27f098cc889b71638b (patch)
tree7add5b3b2bfded9f5d16d9ea5d3d3be93ff499b6 /kernel/signal.c
parent1681634b8c70353d8ca211b9b3443889a16dafeb (diff)
downloadlinux-176826af03666758c656dd27f098cc889b71638b.tar.xz
signal: lift sigset size check out of do_sigpending()
As sigsetsize argument of do_sigpending() is not used anywhere else in that function after the check, remove this argument and move the check out of do_sigpending() into rt_sigpending() and its compat analog. Suggested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Dmitry V. Levin <ldv@altlinux.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c21
1 files changed, 14 insertions, 7 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index f59c05fc374a..9fbc574ced10 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2629,11 +2629,8 @@ COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset,
}
#endif
-static int do_sigpending(void *set, unsigned long sigsetsize)
+static int do_sigpending(sigset_t *set)
{
- if (sigsetsize > sizeof(sigset_t))
- return -EINVAL;
-
spin_lock_irq(&current->sighand->siglock);
sigorsets(set, &current->pending.signal,
&current->signal->shared_pending.signal);
@@ -2653,7 +2650,12 @@ static int do_sigpending(void *set, unsigned long sigsetsize)
SYSCALL_DEFINE2(rt_sigpending, sigset_t __user *, uset, size_t, sigsetsize)
{
sigset_t set;
- int err = do_sigpending(&set, sigsetsize);
+ int err;
+
+ if (sigsetsize > sizeof(*uset))
+ return -EINVAL;
+
+ err = do_sigpending(&set);
if (!err && copy_to_user(uset, &set, sigsetsize))
err = -EFAULT;
return err;
@@ -2664,7 +2666,12 @@ COMPAT_SYSCALL_DEFINE2(rt_sigpending, compat_sigset_t __user *, uset,
compat_size_t, sigsetsize)
{
sigset_t set;
- int err = do_sigpending(&set, sigsetsize);
+ int err;
+
+ if (sigsetsize > sizeof(*uset))
+ return -EINVAL;
+
+ err = do_sigpending(&set);
if (!err)
err = put_compat_sigset(uset, &set, sigsetsize);
return err;
@@ -3331,7 +3338,7 @@ SYSCALL_DEFINE1(sigpending, old_sigset_t __user *, set)
COMPAT_SYSCALL_DEFINE1(sigpending, compat_old_sigset_t __user *, set32)
{
sigset_t set;
- int err = do_sigpending(&set, sizeof(set.sig[0]));
+ int err = do_sigpending(&set);
if (!err)
err = put_user(set.sig[0], set32);
return err;