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Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c82
1 files changed, 25 insertions, 57 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 800a18f77732..babb36d3d039 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1036,8 +1036,7 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t,
else
override_rlimit = 0;
- q = __sigqueue_alloc(sig, t, GFP_ATOMIC | __GFP_NOTRACK_FALSE_POSITIVE,
- override_rlimit);
+ q = __sigqueue_alloc(sig, t, GFP_ATOMIC, override_rlimit);
if (q) {
list_add_tail(&q->list, &pending->list);
switch ((unsigned long) info) {
@@ -2600,7 +2599,6 @@ SYSCALL_DEFINE4(rt_sigprocmask, int, how, sigset_t __user *, nset,
COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset,
compat_sigset_t __user *, oset, compat_size_t, sigsetsize)
{
-#ifdef __BIG_ENDIAN
sigset_t old_set = current->blocked;
/* XXX: Don't preclude handling different sized sigset_t's. */
@@ -2608,38 +2606,22 @@ COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset,
return -EINVAL;
if (nset) {
- compat_sigset_t new32;
sigset_t new_set;
int error;
- if (copy_from_user(&new32, nset, sizeof(compat_sigset_t)))
+ if (get_compat_sigset(&new_set, nset))
return -EFAULT;
-
- sigset_from_compat(&new_set, &new32);
sigdelsetmask(&new_set, sigmask(SIGKILL)|sigmask(SIGSTOP));
error = sigprocmask(how, &new_set, NULL);
if (error)
return error;
}
- if (oset) {
- compat_sigset_t old32;
- sigset_to_compat(&old32, &old_set);
- if (copy_to_user(oset, &old32, sizeof(compat_sigset_t)))
- return -EFAULT;
- }
- return 0;
-#else
- return sys_rt_sigprocmask(how, (sigset_t __user *)nset,
- (sigset_t __user *)oset, sigsetsize);
-#endif
+ return oset ? put_compat_sigset(oset, &old_set, sizeof(*oset)) : 0;
}
#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);
@@ -2659,7 +2641,12 @@ 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;
@@ -2669,20 +2656,16 @@ SYSCALL_DEFINE2(rt_sigpending, sigset_t __user *, uset, size_t, sigsetsize)
COMPAT_SYSCALL_DEFINE2(rt_sigpending, compat_sigset_t __user *, uset,
compat_size_t, sigsetsize)
{
-#ifdef __BIG_ENDIAN
sigset_t set;
- int err = do_sigpending(&set, sigsetsize);
- if (!err) {
- compat_sigset_t set32;
- sigset_to_compat(&set32, &set);
- /* we can get here only if sigsetsize <= sizeof(set) */
- if (copy_to_user(uset, &set32, sigsetsize))
- err = -EFAULT;
- }
+ int err;
+
+ if (sigsetsize > sizeof(*uset))
+ return -EINVAL;
+
+ err = do_sigpending(&set);
+ if (!err)
+ err = put_compat_sigset(uset, &set, sigsetsize);
return err;
-#else
- return sys_rt_sigpending((sigset_t __user *)uset, sigsetsize);
-#endif
}
#endif
@@ -2698,7 +2681,7 @@ enum siginfo_layout siginfo_layout(int sig, int si_code)
[SIGSEGV] = { NSIGSEGV, SIL_FAULT },
[SIGBUS] = { NSIGBUS, SIL_FAULT },
[SIGTRAP] = { NSIGTRAP, SIL_FAULT },
-#if defined(SIGMET) && defined(NSIGEMT)
+#if defined(SIGEMT) && defined(NSIGEMT)
[SIGEMT] = { NSIGEMT, SIL_FAULT },
#endif
[SIGCHLD] = { NSIGCHLD, SIL_CHLD },
@@ -2916,7 +2899,6 @@ COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait, compat_sigset_t __user *, uthese,
struct compat_siginfo __user *, uinfo,
struct compat_timespec __user *, uts, compat_size_t, sigsetsize)
{
- compat_sigset_t s32;
sigset_t s;
struct timespec t;
siginfo_t info;
@@ -2925,9 +2907,8 @@ COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait, compat_sigset_t __user *, uthese,
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;
- if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t)))
+ if (get_compat_sigset(&s, uthese))
return -EFAULT;
- sigset_from_compat(&s, &s32);
if (uts) {
if (compat_get_timespec(&t, uts))
@@ -3345,15 +3326,11 @@ SYSCALL_DEFINE1(sigpending, old_sigset_t __user *, set)
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE1(sigpending, compat_old_sigset_t __user *, set32)
{
-#ifdef __BIG_ENDIAN
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;
-#else
- return sys_rt_sigpending((sigset_t __user *)set32, sizeof(*set32));
-#endif
}
#endif
@@ -3451,7 +3428,6 @@ COMPAT_SYSCALL_DEFINE4(rt_sigaction, int, sig,
compat_size_t, sigsetsize)
{
struct k_sigaction new_ka, old_ka;
- compat_sigset_t mask;
#ifdef __ARCH_HAS_SA_RESTORER
compat_uptr_t restorer;
#endif
@@ -3469,19 +3445,18 @@ COMPAT_SYSCALL_DEFINE4(rt_sigaction, int, sig,
ret |= get_user(restorer, &act->sa_restorer);
new_ka.sa.sa_restorer = compat_ptr(restorer);
#endif
- ret |= copy_from_user(&mask, &act->sa_mask, sizeof(mask));
+ ret |= get_compat_sigset(&new_ka.sa.sa_mask, &act->sa_mask);
ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
if (ret)
return -EFAULT;
- sigset_from_compat(&new_ka.sa.sa_mask, &mask);
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
- sigset_to_compat(&mask, &old_ka.sa.sa_mask);
ret = put_user(ptr_to_compat(old_ka.sa.sa_handler),
&oact->sa_handler);
- ret |= copy_to_user(&oact->sa_mask, &mask, sizeof(mask));
+ ret |= put_compat_sigset(&oact->sa_mask, &old_ka.sa.sa_mask,
+ sizeof(oact->sa_mask));
ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
#ifdef __ARCH_HAS_SA_RESTORER
ret |= put_user(ptr_to_compat(old_ka.sa.sa_restorer),
@@ -3661,22 +3636,15 @@ SYSCALL_DEFINE2(rt_sigsuspend, sigset_t __user *, unewset, size_t, sigsetsize)
#ifdef CONFIG_COMPAT
COMPAT_SYSCALL_DEFINE2(rt_sigsuspend, compat_sigset_t __user *, unewset, compat_size_t, sigsetsize)
{
-#ifdef __BIG_ENDIAN
sigset_t newset;
- compat_sigset_t newset32;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;
- if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t)))
+ if (get_compat_sigset(&newset, unewset))
return -EFAULT;
- sigset_from_compat(&newset, &newset32);
return sigsuspend(&newset);
-#else
- /* on little-endian bitmaps don't care about granularity */
- return sys_rt_sigsuspend((sigset_t __user *)unewset, sigsetsize);
-#endif
}
#endif
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2025-05-10 12:51:26 +0200