Segmentation fault in sock_recvmsg()

thegreatest · 12-21-2005, 03:51 AM

Hie
I am using sock_recvmsg(sock,&msg,size,0) for the user to kernel communication...
but when it runs, it gives a segmentation fault...
Kindly help me by knowing what mistake i am doing in it.
Thanks in advance

Mara · 12-22-2005, 02:33 PM

There's not much to break, so there's probably something wrong with the buffer (msg) you pass. Check everything related to it carefully.

elyk1212 · 12-23-2005, 01:01 PM

Yes, as Mara is mentioning.

Most likely you are passing a buffer that has not been allocated memory, or sock_recvmsg is indexing past the allowed memory in the buffer. Please check that the size you are specifying to sock_recvmsg is not larger than sizeof(msg), either that or you are using using char** instead of char*, then unexpected things happen when you do a &msg, or any variation of incorrect dereferencing.