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linux-user: Handle NULL sched_param argument to sched_* 

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>
This commit is contained in:
Tom Musta 2014-08-12 13:53:38 -05:00 committed by Riku Voipio
parent edcc5f9dc3
commit a1d5c5b25d
1 changed files with 10 additions and 0 deletions
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10
linux-user/syscall.c
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@ -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);