[RHEL 5.5] SCTP: Check if the file structure is valid before checking the non-blocking flag
Issue
- In-kernel sockets created with sock_create_kern() don't usually have a file structure and file descriptor allocated to them.
- As a result, when SCTP tries to check the non-blocking flag, the kernel will panic when dereferencing a NULL file pointer.
Environment
-
Red Hat Enterprise Linux 5 update 5 Snapshot 3
-
x86_64
- kernel-2.6.18-190.el5
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