Messages in this thread Patch in this message | | | Date | Wed, 13 Apr 2011 08:51:35 -0700 | From | Greg KH <> | Subject | [71/74] CAN: Use inode instead of kernel address for /proc file |
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2.6.32-longterm review patch. If anyone has any objections, please let us know.
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From: Dan Rosenberg <drosenberg@vsecurity.com>
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> Cc: Moritz Muehlenhoff <jmm@debian.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- net/can/bcm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/can/bcm.c +++ b/net/can/bcm.c @@ -124,7 +124,7 @@ 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) @@ -1519,7 +1519,7 @@ static int bcm_connect(struct socket *so 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);
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