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| author | Theodore Ts'o <tytso@mit.edu> | 2022-11-06 06:42:36 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2022-11-06 08:07:59 +0300 |
| commit | 0d043351e5baf3857f915367deba2a518b6a0809 (patch) | |
| tree | 10eb059733775be6b51682e384d239eca2f32890 | |
| parent | 9f2a1d9fb33a2129a9ba29bc61d3f14adb28ddc2 (diff) | |
| download | linux-0d043351e5baf3857f915367deba2a518b6a0809.tar.xz | |
ext4: fix fortify warning in fs/ext4/fast_commit.c:1551
With the new fortify string system, rework the memcpy to avoid this
warning:
memcpy: detected field-spanning write (size 60) of single field "&raw_inode->i_generation" at fs/ext4/fast_commit.c:1551 (size 4)
Cc: stable@kernel.org
Fixes: 54d9469bc515 ("fortify: Add run-time WARN for cross-field memcpy()")
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/fast_commit.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/ext4/fast_commit.c b/fs/ext4/fast_commit.c index ef05bfa87798..0f6d0a80467d 100644 --- a/fs/ext4/fast_commit.c +++ b/fs/ext4/fast_commit.c @@ -1521,6 +1521,7 @@ static int ext4_fc_replay_inode(struct super_block *sb, struct ext4_fc_tl *tl, struct ext4_iloc iloc; int inode_len, ino, ret, tag = tl->fc_tag; struct ext4_extent_header *eh; + size_t off_gen = offsetof(struct ext4_inode, i_generation); memcpy(&fc_inode, val, sizeof(fc_inode)); @@ -1548,8 +1549,8 @@ static int ext4_fc_replay_inode(struct super_block *sb, struct ext4_fc_tl *tl, raw_inode = ext4_raw_inode(&iloc); memcpy(raw_inode, raw_fc_inode, offsetof(struct ext4_inode, i_block)); - memcpy(&raw_inode->i_generation, &raw_fc_inode->i_generation, - inode_len - offsetof(struct ext4_inode, i_generation)); + memcpy((u8 *)raw_inode + off_gen, (u8 *)raw_fc_inode + off_gen, + inode_len - off_gen); if (le32_to_cpu(raw_inode->i_flags) & EXT4_EXTENTS_FL) { eh = (struct ext4_extent_header *)(&raw_inode->i_block[0]); if (eh->eh_magic != EXT4_EXT_MAGIC) { |