diff options
| author | Dan Rosenberg <drosenberg@vsecurity.com> | 2010-10-27 15:34:17 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-03-21 12:43:48 -0700 |
| commit | 3cb129c0ea32cb70e982551a8f6f578e46f0f0a8 (patch) | |
| tree | 3eb61efedc0ac295e2ce60e7ec00a79fe601b1e6 /ipc/compat.c | |
| parent | 7ee77118ebd4b01892adaef73633f61dcffc57b3 (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: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'ipc/compat.c')
| -rw-r--r-- | ipc/compat.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/ipc/compat.c b/ipc/compat.c index ab76fb0ef844..5e3e3a15661b 100644 --- a/ipc/compat.c +++ b/ipc/compat.c @@ -242,6 +242,8 @@ long compat_sys_semctl(int first, int second, int third, void __user *uptr) struct semid64_ds __user *up64; int version = compat_ipc_parse_version(&third); + memset(&s64, 0, sizeof(s64)); + if (!uptr) return -EINVAL; if (get_user(pad, (u32 __user *) uptr)) @@ -422,6 +424,8 @@ long compat_sys_msgctl(int first, int second, void __user *uptr) int version = compat_ipc_parse_version(&second); void __user *p; + memset(&m64, 0, sizeof(m64)); + switch (second & (~IPC_64)) { case IPC_INFO: case IPC_RMID: @@ -595,6 +599,8 @@ long compat_sys_shmctl(int first, int second, void __user *uptr) int err, err2; int version = compat_ipc_parse_version(&second); + memset(&s64, 0, sizeof(s64)); + switch (second & (~IPC_64)) { case IPC_RMID: case SHM_LOCK: |