diff options
Diffstat (limited to 'drivers/isdn/capi/capiutil.c')
| -rw-r--r-- | drivers/isdn/capi/capiutil.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/isdn/capi/capiutil.c b/drivers/isdn/capi/capiutil.c index 8e401eda2aa1..36835ef3f340 100644 --- a/drivers/isdn/capi/capiutil.c +++ b/drivers/isdn/capi/capiutil.c @@ -318,6 +318,8 @@ unsigned capi_cmsg2message(_cmsg *cmsg, u8 *msg) cmsg->l = 8; cmsg->p = 0; cmsg->par = capi_cmd2par(cmsg->Command, cmsg->Subcommand); + if (!cmsg->par) + return 1; /* invalid command/subcommand */ pars_2_message(cmsg); @@ -391,6 +393,8 @@ unsigned capi_message2cmsg(_cmsg *cmsg, u8 *msg) byteTRcpy(cmsg->m + 4, &cmsg->Command); byteTRcpy(cmsg->m + 5, &cmsg->Subcommand); cmsg->par = capi_cmd2par(cmsg->Command, cmsg->Subcommand); + if (!cmsg->par) + return 1; /* invalid command/subcommand */ message_2_pars(cmsg); @@ -640,6 +644,9 @@ static _cdebbuf *printstruct(_cdebbuf *cdb, u8 *m) static _cdebbuf *protocol_message_2_pars(_cdebbuf *cdb, _cmsg *cmsg, int level) { + if (!cmsg->par) + return NULL; /* invalid command/subcommand */ + for (; TYP != _CEND; cmsg->p++) { int slen = 29 + 3 - level; int i; |