diff options
| author | Dan Rosenberg <drosenberg@vsecurity.com> | 2010-10-27 15:34:17 -0700 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2011-04-17 16:15:41 -0400 |
| commit | 5819449cad881107f3fd52025b7a0f5134ab1c85 (patch) | |
| tree | ce0e4ad55bec7b92cf1eb0512435c7162c1f02a7 /ipc/compat_mq.c | |
| parent | 546b259bef0d2618f2a466a1a7e5678f245f3024 (diff) | |
ipc: initialize structure memory to zero for compat functions
commit 03145beb455cf5c20a761e8451e30b8a74ba58d9 upstream.
This takes care of leaking uninitialized kernel stack memory to
userspace from non-zeroed fields in structs in compat ipc functions.
Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'ipc/compat_mq.c')
| -rw-r--r-- | ipc/compat_mq.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/ipc/compat_mq.c b/ipc/compat_mq.c index d8d1e9ff4e8..380ea4fe08e 100644 --- a/ipc/compat_mq.c +++ b/ipc/compat_mq.c @@ -53,6 +53,9 @@ asmlinkage long compat_sys_mq_open(const char __user *u_name, void __user *p = NULL; if (u_attr && oflag & O_CREAT) { struct mq_attr attr; + + memset(&attr, 0, sizeof(attr)); + p = compat_alloc_user_space(sizeof(attr)); if (get_compat_mq_attr(&attr, u_attr) || copy_to_user(p, &attr, sizeof(attr))) @@ -127,6 +130,8 @@ asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, struct mq_attr __user *p = compat_alloc_user_space(2 * sizeof(*p)); long ret; + memset(&mqstat, 0, sizeof(mqstat)); + if (u_mqstat) { if (get_compat_mq_attr(&mqstat, u_mqstat) || copy_to_user(p, &mqstat, sizeof(mqstat))) |