From: Al Viro <viro@ZenIV.linux.org.uk>
Date: Wed, 21 Nov 2012 19:27:23 +0000 (+0000)
Subject: fix user-triggerable panic on parisc
X-Git-Tag: v3.2.35~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=66a572596853a2180272ca6a017cc32e8a56527c;p=pandora-kernel.git

fix user-triggerable panic on parisc

commit 441a179dafc0f99fc8b3a8268eef66958621082e upstream.

int sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, compat_sigset_t __user *oset,
                                    unsigned int sigsetsize)
{
        sigset_t old_set, new_set;
        int ret;

        if (set && get_sigset32(set, &new_set, sigsetsize))

...
static int
get_sigset32(compat_sigset_t __user *up, sigset_t *set, size_t sz)
{
        compat_sigset_t s;
        int r;

        if (sz != sizeof *set) panic("put_sigset32()");

In other words, rt_sigprocmask(69, (void *)69, 69) done by 32bit process
will promptly panic the box.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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