@@ -1925,9 +1925,11 @@ void ext4_inline_data_truncate(struct inode *inode, int *has_inline)
}
/* Clear the content within i_blocks. */
- if (i_size < EXT4_MIN_INLINE_DATA_SIZE)
- memset(ext4_raw_inode(&is.iloc)->i_block + i_size, 0,
- EXT4_MIN_INLINE_DATA_SIZE - i_size);
+ if (i_size < EXT4_MIN_INLINE_DATA_SIZE) {
+ void *p = (void *) ext4_raw_inode(&is.iloc)->i_block;
+ memset(p + i_size, 0,
+ EXT4_MIN_INLINE_DATA_SIZE - i_size);
+ }
EXT4_I(inode)->i_inline_size = i_size <
EXT4_MIN_INLINE_DATA_SIZE ?
This is a note to let you know that I have just added a patch titled ext4: avoid clearing beyond i_blocks when truncating an inline data to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.11.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From c6c0d817eb2b39d464aba328937f4952bbef7a67 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o <tytso@mit.edu> Date: Tue, 7 Jan 2014 12:58:19 -0500 Subject: ext4: avoid clearing beyond i_blocks when truncating an inline data file commit 09c455aaa8f47a94d5bafaa23d58365768210507 upstream. A missing cast means that when we are truncating a file which is less than 60 bytes, we don't clear the correct area of memory, and in fact we can end up truncating the next inode in the inode table, or worse yet, some other kernel data structure. Addresses-Coverity-Id: #751987 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- fs/ext4/inline.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) -- 1.8.3.2