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| author |   Ryusuke Konishi <konishi.ryusuke@gmail.com> | 2022-10-02 12:08:04 +0900 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2022-10-11 19:05:45 -0700 |
| commit | 21a87d88c2253350e115029f14fe2a10a7e6c856 (patch) | |
| tree | 9462cceadbe4c3ab0016217057cec111cf86e75d /fs/nilfs2/segment.c | |
| parent | nilfs2: fix use-after-free bug of struct nilfs_root (diff) | |
| download | linux-dev-21a87d88c2253350e115029f14fe2a10a7e6c856.tar.xz linux-dev-21a87d88c2253350e115029f14fe2a10a7e6c856.zip | |
nilfs2: fix NULL pointer dereference at nilfs_bmap_lookup_at_level()
If the i_mode field in inode of metadata files is corrupted on disk, it
can cause the initialization of bmap structure, which should have been
called from nilfs_read_inode_common(), not to be called. This causes a
lockdep warning followed by a NULL pointer dereference at
nilfs_bmap_lookup_at_level().
This patch fixes these issues by adding a missing sanitiy check for the
i_mode field of metadata file's inode.
Link: https://lkml.kernel.org/r/20221002030804.29978-1-konishi.ryusuke@gmail.com
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Reported-by: syzbot+2b32eb36c1a825b7a74c@syzkaller.appspotmail.com
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Tested-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2/segment.c')
0 files changed, 0 insertions, 0 deletions