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| author | Rustam Kovhaev <rkovhaev@gmail.com> | 2020-11-01 17:09:58 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-06 16:45:00 +0300 |
| commit | b8590c82b3ccf9fb4d9f0b0b097be10736869333 (patch) | |
| tree | 786eb7adfcc7ced676927d081631046c35eb5bba /fs/fs_struct.c | |
| parent | 88520a207121c3f7c513ac69a7392da89ed0955f (diff) | |
| download | linux-b8590c82b3ccf9fb4d9f0b0b097be10736869333.tar.xz | |
reiserfs: add check for an invalid ih_entry_count
commit d24396c5290ba8ab04ba505176874c4e04a2d53c upstream.
when directory item has an invalid value set for ih_entry_count it might
trigger use-after-free or out-of-bounds read in bin_search_in_dir_item()
ih_entry_count * IH_SIZE for directory item should not be larger than
ih_item_len
Link: https://lore.kernel.org/r/20201101140958.3650143-1-rkovhaev@gmail.com
Reported-and-tested-by: syzbot+83b6f7cf9922cae5c4d7@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?extid=83b6f7cf9922cae5c4d7
Signed-off-by: Rustam Kovhaev <rkovhaev@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/fs_struct.c')
0 files changed, 0 insertions, 0 deletions