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arm64: compat: use compat_uptr_t type for compat_ucontext.uc_link 

struct compat_ucontext * is a 64-bit pointer, so we need to use a
compat_uptr_t instead to avoid declaring a structure incompatible with
what AArch32 userspace expects.

Cc: <stable@vger.kernel.org>
Reported-by: Edmund Grimley-Evans <Edmund.Grimley-Evans@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Will Deacon 2013-02-06 11:42:23 +00:00 committed by Catalin Marinas
parent b6f3598140
commit c0e01d5d8f
1 changed files with 2 additions and 2 deletions
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4
arch/arm64/kernel/signal32.c
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@ -76,7 +76,7 @@ struct compat_sigcontext {
struct compat_ucontext {
compat_ulong_t uc_flags;
struct compat_ucontext *uc_link;
compat_uptr_t uc_link;
compat_stack_t uc_stack;
struct compat_sigcontext uc_mcontext;
compat_sigset_t uc_sigmask;
@ -703,7 +703,7 @@ int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
err |= copy_siginfo_to_user32(&frame->info, info);
__put_user_error(0, &frame->sig.uc.uc_flags, err);
__put_user_error(NULL, &frame->sig.uc.uc_link, err);
__put_user_error(0, &frame->sig.uc.uc_link, err);
memset(&stack, 0, sizeof(stack));
stack.ss_sp = (compat_uptr_t)current->sas_ss_sp;