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

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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>
This commit is contained in:
Andy Lutomirski 2016-03-22 14:24:55 -07:00 committed by Linus Torvalds
parent 5c38065e02
commit 5c465217a9
1 changed files with 1 additions and 1 deletions
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kernel/ptrace.c
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@ -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) ||