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ext4 crypto: fail the mount if blocksize != pagesize

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We currently don't correctly handle the case where blocksize !=
pagesize, so disallow the mount in those cases.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2015-06-12 23:44:33 -04:00
parent 331573febb
commit 1cb767cd4a
1 changed files with 9 additions and 1 deletions
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10
fs/ext4/super.c
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@ -4065,7 +4065,15 @@ no_journal:
}
}
if (unlikely(sbi->s_mount_flags & EXT4_MF_TEST_DUMMY_ENCRYPTION) &&
if ((DUMMY_ENCRYPTION_ENABLED(sbi) ||
EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT)) &&
(blocksize != PAGE_CACHE_SIZE)) {
ext4_msg(sb, KERN_ERR,
"Unsupported blocksize for fs encryption");
goto failed_mount_wq;
}
if (DUMMY_ENCRYPTION_ENABLED(sbi) &&
!(sb->s_flags & MS_RDONLY) &&
!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT)) {
EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT);