diff options
| author | Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | 2006-04-18 03:04:00 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-04-24 09:56:05 -0700 |
| commit | 1fca16492a85f69fbdd498fdd66156f7de44262d (patch) | |
| tree | bcd846cab30ecee53d8a7bfe577a487215fc8a74 | |
| parent | 7517f43bef6016c58c007446f882ecf98a5e287b (diff) | |
[PATCH] IPC: access to unmapped vmalloc area in grow_ary()
grow_ary() should not copy struct ipc_id_ary (it copies new->p, not
new). Due to this, memcpy() src pointer could hit unmapped vmalloc page
when near page boundary.
Found during OpenVZ stress testing
Signed-off-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Signed-off-by: Kirill Korotaev <dev@openvz.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | ipc/util.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/ipc/util.c b/ipc/util.c index 862621980b01..303b05844f58 100644 --- a/ipc/util.c +++ b/ipc/util.c @@ -182,8 +182,7 @@ static int grow_ary(struct ipc_ids* ids, int newsize) if(new == NULL) return size; new->size = newsize; - memcpy(new->p, ids->entries->p, sizeof(struct kern_ipc_perm *)*size + - sizeof(struct ipc_id_ary)); + memcpy(new->p, ids->entries->p, sizeof(struct kern_ipc_perm *)*size); for(i=size;i<newsize;i++) { new->p[i] = NULL; } |