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authorEmese Revfy <re.emese@gmail.com>2013-04-17 15:58:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-17 16:10:45 -0700
commitb9e146d8eb3b9ecae5086d373b50fa0c1f3e7f0f (patch)
tree2b6d313cc798d76ea1f50e63fa60ceb1f753c89a /tools
parentd72515b85a6583db131ec6032978e3c9d4291d95 (diff)
downloadvexpress-lsk-b9e146d8eb3b9ecae5086d373b50fa0c1f3e7f0f.tar.gz
kernel/signal.c: stop info leak via the tkill and the tgkill syscalls
This fixes a kernel memory contents leak via the tkill and tgkill syscalls for compat processes. This is visible in the siginfo_t->_sifields._rt.si_sigval.sival_ptr field when handling signals delivered from tkill. The place of the infoleak: int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) { ... put_user_ex(ptr_to_compat(from->si_ptr), &to->si_ptr); ... } Signed-off-by: Emese Revfy <re.emese@gmail.com> Reviewed-by: PaX Team <pageexec@freemail.hu> Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Oleg Nesterov <oleg@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Serge Hallyn <serge.hallyn@canonical.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools')
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