On Thu, 27 Jun 2019 16:01:40 +0200, Colin Ian King wrote:
Hi there,
Static analysis with Coverity has picked up two potential issues with the call to function snd_seq_oss_fill_addr. The prototype of snd_seq_oss_fill_addr is as follows:
static inline void snd_seq_oss_fill_addr(struct seq_oss_devinfo *dp, struct snd_seq_event *ev,int dest_client, int dest_port)
However, in sound/core/seq/oss/seq_oss_ioctl.c in function snd_seq_oss_oob_user it is being called as follows:
snd_seq_oss_fill_addr(dp, &tmpev, dp->addr.port, dp->addr.client);and also in sound/core/seq/oss/seq_oss_rw.c in function is it also being called as follows:
snd_seq_oss_fill_addr(dp, &event, dp->addr.port, dp->addr.client);
..as one can see, in both cases the port and client arguments are swapped compared to the function prototype. I doubt this is intentional but you never know. Are these bugs?
That's a clear bug, the order should be (client, port), so it's bugs in the caller side. They are rare use case, so probably no one really hits or is annoyed -- the latter is a note-off just to be sure, and the former is a special ioctl probably that has been never used :)
In anyway, would you send me a fix patch?
Thanks!
Takashi
Colin