diff options
author | Emese Revfy <re.emese@gmail.com> | 2013-04-17 15:58:36 -0700 |
---|---|---|
committer | Ben Hutchings <ben@decadent.org.uk> | 2013-04-25 20:25:42 +0100 |
commit | ffe1341edbe2878134f3083625d5c916670d0fca (patch) | |
tree | f311f54950c0617b74dcfe06bd31d2d6f0a4c3d8 /net/rfkill | |
parent | 7ec0873ac3cba439ee9846e8cbc332cac0e6c1f5 (diff) |
kernel/signal.c: stop info leak via the tkill and the tgkill syscalls
commit b9e146d8eb3b9ecae5086d373b50fa0c1f3e7f0f upstream.
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net/rfkill')
0 files changed, 0 insertions, 0 deletions