ext4: strong binding of xattr inode references

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To verify that a xattr entry is not pointing to the wrong xattr inode,
we currently check that the target inode has EXT4_EA_INODE_FL flag set and
also the entry size matches the target inode size.

For stronger validation, also incorporate crc32c hash of the value into
the e_hash field. This is done regardless of whether the entry lives in
the inode body or external attribute block.

Signed-off-by: Tahsin Erdogan <tahsin@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

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Tahsin Erdogan 2017-06-22 11:53:15 -04:00 • committed by Theodore Ts'o

parent daf8328172

commit b9fc761ea2

1 changed files with 65 additions and 39 deletions

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fs/ext4/xattr.c

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