Description: use-after-free in ext4_xattr_set_entry()
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=1596806
 https://bugzilla.kernel.org/show_bug.cgi?id=200001
 https://patchwork.ozlabs.org/patch/928666/
 https://patchwork.ozlabs.org/patch/928667/
Notes:
Bugs:
upstream: released (4.18-rc4) [5369a762c882c0b6e9599e4ebbb3a9ba9eee7e2d, 513f86d73855ce556ea9522b6bfd79f87356dc3a]
4.9-upstream-stable: released (4.9.133) [b469713e0c0cf3dadc9bbc59e9fd6780e1853c5a, 0050338e0d3c3e3047507c4998b132e52baafc44]
3.16-upstream-stable: released (3.16.58) [ext4-add-corruption-check-in-ext4_xattr_set_entry.patch, ext4-always-verify-the-magic-number-in-xattr-blocks.patch]
sid: released (4.17.3-1) [bugfix/all/ext4-add-corruption-check-in-ext4_xattr_set_entry.patch, bugfix/all/ext4-always-verify-the-magic-number-in-xattr-blocks.patch]
4.9-stretch-security: released (4.9.110-1) [bugfix/all/ext4-add-corruption-check-in-ext4_xattr_set_entry.patch, bugfix/all/ext4-always-verify-the-magic-number-in-xattr-blocks.patch]
3.16-jessie-security: released (3.16.59-1)