On 3/13/14, 4:54 AM, Daniel Borkmann wrote:
On 03/13/2014 03:30 AM, Dong Liu wrote:
Hi,
I think I found a problem in the new sctp_connectx() code.
in sctp_connectx3() there are,
struct sctp_getaddrs_old param;
socklen_t opt_len = sizeof(param);
status getsockopt(fd, SOL_SCTP, SCTP_SOCKOPT_CONNECTX3, ¶m,
&opt_len);
And in kernel net/sctp/socket.c sctp_getsockopt_connectx3(), there is
a check,
if (len < sizeof(param)) |
return -EINVAL; |
But struct sctp_getaddrs_old contains a pointer . When compiled in 32
bit or 64 bit,
> the size of sctp_getaddrs_old is different. So if the kernel is in
64 bit mode but
> the libsctp is in 32 bit mode. sctp_connectx() will fail with EINVAL.
Kernel issue already fixed in:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ffd5939381c609056b33b7585fb05a77b4c695f3
Thanks Daniel,
The patch is small, I can easily apply to my running kernel.
Dong
Thanks,
Dong
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