diff options
| author | Al Viro <viro@ZenIV.linux.org.uk> | 2012-11-21 19:27:23 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-12-03 11:37:58 -0800 |
| commit | ad362b2ba5fc62b5bd7740b9aee9ef7c3f4b9466 (patch) | |
| tree | 27d3bc1365aab6b404489c7b081e0ccefb865444 /arch | |
| parent | 6be49c441050e8a63407f32c14cb59dc5324f252 (diff) | |
| download | lwn-ad362b2ba5fc62b5bd7740b9aee9ef7c3f4b9466.tar.gz lwn-ad362b2ba5fc62b5bd7740b9aee9ef7c3f4b9466.zip | |
PARISC: 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/parisc/kernel/signal32.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/parisc/kernel/signal32.c b/arch/parisc/kernel/signal32.c index fd49aeda9eb8..5dede04f2f3e 100644 --- a/arch/parisc/kernel/signal32.c +++ b/arch/parisc/kernel/signal32.c @@ -65,7 +65,8 @@ put_sigset32(compat_sigset_t __user *up, sigset_t *set, size_t sz) { compat_sigset_t s; - if (sz != sizeof *set) panic("put_sigset32()"); + if (sz != sizeof *set) + return -EINVAL; sigset_64to32(&s, set); return copy_to_user(up, &s, sizeof s); @@ -77,7 +78,8 @@ 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()"); + if (sz != sizeof *set) + return -EINVAL; if ((r = copy_from_user(&s, up, sz)) == 0) { sigset_32to64(set, &s); |