Description: f2fs: fix to do sanity check on last xattr entry in __f2fs_setxattr()
References:
 https://bugzilla.kernel.org/show_bug.cgi?id=215235
 https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?h=dev&id=5598b24efaf4892741c798b425d543e4bed357a1
Notes:
 carnil> for 5.15.y fixed as well in 5.15.12.
 bwh> This is due to an incomplete fix for CVE-2019-9453.
Bugs:
upstream: released (5.17-rc1) [645a3c40ca3d40cc32b4b5972bf2620f2eb5dba6]
5.10-upstream-stable: released (5.10.89) [fffb6581a23add416239dfcf7e7f3980c6b913da]
4.19-upstream-stable: released (4.19.223) [f9dfa44be0fb5e8426183a70f69a246cf5827f49]
4.9-upstream-stable: needed
sid: released (5.15.15-1)
5.10-bullseye-security: released (5.10.92-1)
4.19-buster-security: released (4.19.232-1)
4.9-stretch-security: ignored "f2fs is not supportable"