In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: fix sdreq TLV list leak on parse/alloc/send failure nfc_gen

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

nfc: llcp: fix sdreq TLV list leak on parse/alloc/send failure

nfc_genl_llc_sdreq() builds a list of TLV nodes while walking nested
netlink attrs, but 3 error paths (nested-attr parse failure, TLV alloc
ENOMEM, nfc_llcp_send_snl_sdreq() failure) all skip freeing what was
already queued.

Route them through a new free_list label, mirroring the SDRES path in
the same file which already does this. Harmless on the success path
too -- send_snl_sdreq() drains the list as it moves nodes, so it's
already empty by the time free_list runs.