diff options
| author | Al Viro <viro@ZenIV.linux.org.uk> | 2012-11-21 19:27:23 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-12-06 11:20:34 +0000 |
| commit | 66a572596853a2180272ca6a017cc32e8a56527c (patch) | |
| tree | 51010b3ed26d265250ab67ab98ccdd38cfab19c1 | |
| parent | e961f8822e342a846be1b6e0e7c1ec5f18932511 (diff) | |
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>
| -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 e1413243076..d0ea054bd3d 100644 --- a/arch/parisc/kernel/signal32.c +++ b/arch/parisc/kernel/signal32.c @@ -67,7 +67,8 @@ 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); @@ -79,7 +80,8 @@ 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); |