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authorTheodore Ts'o <tytso@mit.edu>2018-12-19 20:28:13 +0300
committerTheodore Ts'o <tytso@mit.edu>2018-12-19 20:28:13 +0300
commita805622a757b6d7f65def4141d29317d8e37b8a1 (patch)
tree7671de64bfcd4e04b839878dd8793e026e75efe9 /fs/ext4
parent0a1e8258a4fecd5aad2815b43bbe0ff014de1d8a (diff)
downloadlinux-a805622a757b6d7f65def4141d29317d8e37b8a1.tar.xz
ext4: include terminating u32 in size of xattr entries when expanding inodes
In ext4_expand_extra_isize_ea(), we calculate the total size of the xattr header, plus the xattr entries so we know how much of the beginning part of the xattrs to move when expanding the inode extra size. We need to include the terminating u32 at the end of the xattr entries, or else if there is uninitialized, non-zero bytes after the xattr entries and before the xattr values, the list of xattr entries won't be properly terminated. Reported-by: Steve Graham <stgraham2000@gmail.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@kernel.org
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/xattr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 510c9bb7ce71..91037890a90b 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -2721,7 +2721,7 @@ retry:
base = IFIRST(header);
end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
min_offs = end - base;
- total_ino = sizeof(struct ext4_xattr_ibody_header);
+ total_ino = sizeof(struct ext4_xattr_ibody_header) + sizeof(u32);
error = xattr_check_inode(inode, header, end);
if (error)