Fix: kernel/ptrace.c: ptrace_peek_siginfo() missing __put_user() validation

This __put_user() could be used by unprivileged processes to write into
kernel memory.  The issue here is that even if copy_siginfo_to_user()
fails, the error code is not checked before __put_user() is executed.

Luckily, ptrace_peek_siginfo() has been added within the 3.10-rc cycle,
so it has not hit a stable release yet.

Signed-off-by: Mathieu Desnoyers <[email protected]>
Acked-by: Oleg Nesterov <[email protected]>
Cc: Andrey Vagin <[email protected]>
Cc: Roland McGrath <[email protected]>
Cc: Paul McKenney <[email protected]>
Cc: David Howells <[email protected]>
Cc: Dave Jones <[email protected]>
Cc: Pavel Emelyanov <[email protected]>
Cc: Pedro Alves <[email protected]>
Cc: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions