diff options
| author | Dan Rosenberg <drosenberg@vsecurity.com> | 2010-12-26 06:54:53 +0000 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2011-06-26 12:47:19 -0400 |
| commit | 11c66be05f49f70a635a6eb63e6cffea520b22c5 (patch) | |
| tree | a2a2254659abea9ef3310dbe4cb95a7c406dd05e | |
| parent | 5cf8a08026f539f396a3170d1991d651ee0fb30c (diff) | |
| download | linux-rt-11c66be05f49f70a635a6eb63e6cffea520b22c5.tar.gz | |
CAN: Use inode instead of kernel address for /proc file
commit 9f260e0efa4766e56d0ac14f1aeea6ee5eb8fe83 upstream.
Since the socket address is just being used as a unique identifier, its
inode number is an alternative that does not leak potentially sensitive
information.
CC-ing stable because MITRE has assigned CVE-2010-4565 to the issue.
Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| -rw-r--r-- | net/can/bcm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/can/bcm.c b/net/can/bcm.c index b8f7a2f9b8a5..dd23fb1ec5c8 100644 --- a/net/can/bcm.c +++ b/net/can/bcm.c @@ -125,7 +125,7 @@ struct bcm_sock { struct list_head tx_ops; unsigned long dropped_usr_msgs; struct proc_dir_entry *bcm_proc_read; - char procname [20]; /* pointer printed in ASCII with \0 */ + char procname [32]; /* inode number in decimal with \0 */ }; static inline struct bcm_sock *bcm_sk(const struct sock *sk) @@ -1523,7 +1523,7 @@ static int bcm_connect(struct socket *sock, struct sockaddr *uaddr, int len, if (proc_dir) { /* unique socket address as filename */ - sprintf(bo->procname, "%p", sock); + sprintf(bo->procname, "%lu", sock_i_ino(sk)); bo->bcm_proc_read = proc_create_data(bo->procname, 0644, proc_dir, &bcm_proc_fops, sk); |