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| author | Shreyansh Chouhan <chouhan.shreyansh630@gmail.com> | 2021-07-09 20:59:29 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-08-15 12:59:56 +0200 |
| commit | 4ababa17d7a14fd79eb92a5c135a999a6a51413f (patch) | |
| tree | 252a1eb2bdd68bbc4441f5d4ba027c9b8567cfca /lib/string_helpers.c | |
| parent | bbddd8fc929d04158aa9c1931736a05d27dee1ec (diff) | |
reiserfs: check directory items on read from disk
[ Upstream commit 13d257503c0930010ef9eed78b689cec417ab741 ]
While verifying the leaf item that we read from the disk, reiserfs
doesn't check the directory items, this could cause a crash when we
read a directory item from the disk that has an invalid deh_location.
This patch adds a check to the directory items read from the disk that
does a bounds check on deh_location for the directory entries. Any
directory entry header with a directory entry offset greater than the
item length is considered invalid.
Link: https://lore.kernel.org/r/20210709152929.766363-1-chouhan.shreyansh630@gmail.com
Reported-by: syzbot+c31a48e6702ccb3d64c9@syzkaller.appspotmail.com
Signed-off-by: Shreyansh Chouhan <chouhan.shreyansh630@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'lib/string_helpers.c')
0 files changed, 0 insertions, 0 deletions