scsi: lpfc: Fix a possible null pointer dereference

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix a possible null pointer dereference In function lpfc_xcvr_data_show, the memory allocation with kmalloc might fail, thereby making rdp_context a null pointer. In the following context and functions that use this pointer, there are dereferencing operations, leading to null pointer dereference. To fix this issue, a null pointer check should be added. If it is null, use scnprintf to notify the user and return len.

References

• https://git.kernel.org/stable/c/57600a7dd2b52c904f7c8d2cac0fd8c23868e680
• https://git.kernel.org/stable/c/45b2a23e00d448a9e6d1f371ca3a4d4b073fe78c
• https://git.kernel.org/stable/c/5e0bf3e8aec2cbc51123f84b29aaacbd91fc56fa