diff mbox

[PULL,v3,15/22] linux-user: Handle NULL sched_param argument to sched_*

Message ID a1d5c5b25d06b68aec76e4b0eb7d8aacb5fbd191.1408712881.git.riku.voipio@linaro.org
State New
Headers show

Commit Message

Riku Voipio Aug. 22, 2014, 1:24 p.m. UTC 
From: Tom Musta <tommusta@gmail.com>

The sched_getparam, sched_setparam and sched_setscheduler system
calls take a pointer argument to a sched_param structure.  When
this pointer is null, errno should be set to EINVAL.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 linux-user/syscall.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
diff mbox

Patch

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 2549249..4424b63 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7736,6 +7736,9 @@  abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
             struct sched_param *target_schp;
             struct sched_param schp;
 
+            if (arg2 == 0) {
+                return -TARGET_EINVAL;
+            }
             if (!lock_user_struct(VERIFY_READ, target_schp, arg2, 1))
                 goto efault;
             schp.sched_priority = tswap32(target_schp->sched_priority);
@@ -7747,6 +7750,10 @@  abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         {
             struct sched_param *target_schp;
             struct sched_param schp;
+
+            if (arg2 == 0) {
+                return -TARGET_EINVAL;
+            }
             ret = get_errno(sched_getparam(arg1, &schp));
             if (!is_error(ret)) {
                 if (!lock_user_struct(VERIFY_WRITE, target_schp, arg2, 0))
@@ -7760,6 +7767,9 @@  abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         {
             struct sched_param *target_schp;
             struct sched_param schp;
+            if (arg3 == 0) {
+                return -TARGET_EINVAL;
+            }
             if (!lock_user_struct(VERIFY_READ, target_schp, arg3, 1))
                 goto efault;
             schp.sched_priority = tswap32(target_schp->sched_priority);