Commit 5c465217 authored Mar 22, 2016 by Andy Lutomirski Committed by Linus Torvalds Mar 22, 2016

ptrace: in PEEK_SIGINFO, check syscall bitness, not task bitness



Users of the 32-bit ptrace() ABI expect the full 32-bit ABI.  siginfo
translation should check ptrace() ABI, not caller task ABI.

This is an ABI change on SPARC.  Let's hope that no one relied on the
old buggy ABI.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 5c38065e

kernel/ptrace.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -681,7 +681,7 @@ static int ptrace_peek_siginfo(struct task_struct *child,
		break;

		#ifdef CONFIG_COMPAT
		if (unlikely(is_compat_task())) {
		if (unlikely(in_compat_syscall())) {
		compat_siginfo_t __user *uinfo = compat_ptr(data);

		if (copy_siginfo_to_user32(uinfo, &info) \|\|

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