CVE-2025-39873 can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB

In the Linux kernel, the following vulnerability has been resolved: can: xilinxcan: xcanwriteframe: fix use-after-free of transmitted SKB canputechoskb takes ownership of the SKB and it may be freed during or after the call. However, xilinxcan xcanwriteframe keeps using SKB after the call. Fix th...