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sigaltstack: support SS_AUTODISARM for CONFIG_COMPAT

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am: 6d94a6b32e

Change-Id: I972940b00813db773e278ce8b6bc46f3cba15988
This commit is contained in:
Stas Sergeev
2017-03-12 08:18:16 +00:00
committed by android-build-merger
parent f565af10c3 6d94a6b32e
commit 6d8a3f1ca1
2 changed files with 12 additions and 3 deletions
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4
include/linux/compat.h
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@@ -711,8 +711,10 @@ int __compat_save_altstack(compat_stack_t __user *, unsigned long);
compat_stack_t __user *__uss = uss; \
struct task_struct *t = current; \
put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
put_user_ex(sas_ss_flags(sp), &__uss->ss_flags); \
put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
put_user_ex(t->sas_ss_size, &__uss->ss_size); \
if (t->sas_ss_flags & SS_AUTODISARM) \
sas_ss_reset(t); \
} while (0);
asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,

11
kernel/signal.c
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@@ -3226,10 +3226,17 @@ int compat_restore_altstack(const compat_stack_t __user *uss)
int __compat_save_altstack(compat_stack_t __user *uss, unsigned long sp)
{
int err;
struct task_struct *t = current;
return __put_user(ptr_to_compat((void __user *)t->sas_ss_sp), &uss->ss_sp) |
__put_user(sas_ss_flags(sp), &uss->ss_flags) |
err = __put_user(ptr_to_compat((void __user *)t->sas_ss_sp),
&uss->ss_sp) |
__put_user(t->sas_ss_flags, &uss->ss_flags) |
__put_user(t->sas_ss_size, &uss->ss_size);
if (err)
return err;
if (t->sas_ss_flags & SS_AUTODISARM)
sas_ss_reset(t);
return 0;
}
#endif