In the Linux kernel, the following vulnerability has been resolved:

bpftool: Fix NULL pointer dereference when pin {PROG, MAP, LINK} without FILE

When using bpftool to pin {PROG, MAP, LINK} without FILE,
segmentation fault will occur. The reson is that the lack
of FILE will cause strlen to trigger NULL pointer dereference.
The corresponding stacktrace is shown below:

do_pin
  do_pin_any
    do_pin_fd
      mount_bpffs_for_pin
        strlen(name) <- NULL pointer dereference

Fix it by adding validation to the common process.

https://git.kernel.org/stable/c/34de8e6e0e1f66e431abf4123934a2581cb5f133

https://git.kernel.org/stable/c/6dcdd1b68b7f9333d48d48fc77b75e7f235f6a4a

https://git.kernel.org/stable/c/8c80b2fca4112d724dde477aed13f7b0510a2792

https://git.kernel.org/stable/c/da5161ba94c5e9182c301dd4f09c94f715c068bd