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| author | Theodore Ts'o <tytso@mit.edu> | 2023-05-23 23:49:50 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2023-05-30 15:33:57 -0400 |
| commit | 2bc7e7c1a3bc9bd0cbf0f71006f6fe7ef24a00c2 (patch) | |
| tree | d24aea3e05637f7b3d6fc67719f91e2399a41576 | |
| parent | b928dfdcb27d8fa59917b794cfba53052a2f050f (diff) | |
| download | iio-2bc7e7c1a3bc9bd0cbf0f71006f6fe7ef24a00c2.tar.gz | |
ext4: disallow ea_inodes with extended attributes
An ea_inode stores the value of an extended attribute; it can not have
extended attributes itself, or this will cause recursive nightmares.
Add a check in ext4_iget() to make sure this is the case.
Cc: stable@kernel.org
Reported-by: syzbot+e44749b6ba4d0434cd47@syzkaller.appspotmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Link: https://lore.kernel.org/r/20230524034951.779531-4-tytso@mit.edu
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/inode.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 258f3cbed347c..02de439bf1f04 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4647,6 +4647,9 @@ static const char *check_igot_inode(struct inode *inode, ext4_iget_flags flags) if (flags & EXT4_IGET_EA_INODE) { if (!(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL)) return "missing EA_INODE flag"; + if (ext4_test_inode_state(inode, EXT4_STATE_XATTR) || + EXT4_I(inode)->i_file_acl) + return "ea_inode with extended attributes"; } else { if ((EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL)) return "unexpected EA_INODE flag"; |