isdn: prevent NULL ptr Oops in capi_cmsg2str()
authorTilman Schmidt <tilman@imap.cc>
Sun, 7 Jun 2009 09:09:24 +0000 (09:09 +0000)
committerDavid S. Miller <davem@davemloft.net>
Mon, 8 Jun 2009 07:45:51 +0000 (00:45 -0700)
commit7d31acda9f8eaa27e2fd232712f7e1f3e9a79bdb
tree977fbd3081ba483b01c37dd1913ba4c9a0a95117
parent4793d15b25821003486bb11b54eaf2f3130ecacd
isdn: prevent NULL ptr Oops in capi_cmsg2str()

The dereferencing of the private pointer cmsg->m in capi_cmsg2str() may
cause an Oops in case of an error, which is particularly inconvenient
as that function is typically used to format an error message. Add a
NULL pointer check to avoid this.

Impact: error handling improvement
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/isdn/capi/capiutil.c