Description: relayfs: fix out-of-bounds access in relay_file_read
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2215502
 https://lore.kernel.org/lkml/1682238502-1892-1-git-send-email-yangpc%40wangsu.com/T/
Notes:
Bugs:
upstream: released (6.4-rc1) [43ec16f1450f4936025a9bdf1a273affdb9732c1]
6.1-upstream-stable: released (6.1.28) [f6ee841ff2169d7a7d045340ee72b2b9de9f06c5]
5.10-upstream-stable: released (5.10.180) [1b0df44753bf9e45eaf5cee34f87597193f862e8]
4.19-upstream-stable: released (4.19.283) [ed32488417669568308b65ba5d45799418f9ed49]
sid: released (6.3.7-1)
6.1-bookworm-security: released (6.1.37-1)
5.10-bullseye-security: released (5.10.191-1)
4.19-buster-security: released (4.19.289-1)