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authorDavid Gstir <david@sigma-star.at>2016-11-13 22:20:48 +0100
committerTheodore Ts'o <tytso@mit.edu>2016-11-13 20:18:16 -0500
commit9c4bb8a3a9b4de21753053d667310c2b7cb39916 (patch)
treef384bbd76dfc293f2cc66c770c5ccfdbc42c43c8 /fs/ext4/page-io.c
parent0b93e1b94b86f826d18a2aaf219a53e271274d49 (diff)
downloadlinux-9c4bb8a3a9b4de21753053d667310c2b7cb39916.tar.bz2
fscrypt: Let fs select encryption index/tweak
Avoid re-use of page index as tweak for AES-XTS when multiple parts of same page are encrypted. This will happen on multiple (partial) calls of fscrypt_encrypt_page on same page. page->index is only valid for writeback pages. Signed-off-by: David Gstir <david@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/page-io.c')
-rw-r--r--fs/ext4/page-io.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 3d1d3d0f4303..902a3e3059b3 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -470,7 +470,8 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
gfp_t gfp_flags = GFP_NOFS;
retry_encrypt:
- data_page = fscrypt_encrypt_page(inode, page, PAGE_SIZE, 0, gfp_flags);
+ data_page = fscrypt_encrypt_page(inode, page, PAGE_SIZE, 0,
+ page->index, gfp_flags);
if (IS_ERR(data_page)) {
ret = PTR_ERR(data_page);
if (ret == -ENOMEM && wbc->sync_mode == WB_SYNC_ALL) {