diff options
| author | Ryusuke Konishi <konishi.ryusuke@gmail.com> | 2023-05-10 00:29:56 +0900 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-05-17 15:24:34 -0700 |
| commit | 9b5a04ac3ad9898c4745cba46ea26de74ba56a8e (patch) | |
| tree | c1510a8587a8813f492a2b9f15455a8ce3978c90 /MAINTAINERS | |
| parent | 04fc7816089c5a32c29a04ec94b998e219dfb946 (diff) | |
| download | lwn-9b5a04ac3ad9898c4745cba46ea26de74ba56a8e.tar.gz lwn-9b5a04ac3ad9898c4745cba46ea26de74ba56a8e.zip | |
nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode()
During unmount process of nilfs2, nothing holds nilfs_root structure after
nilfs2 detaches its writer in nilfs_detach_log_writer(). However, since
nilfs_evict_inode() uses nilfs_root for some cleanup operations, it may
cause use-after-free read if inodes are left in "garbage_list" and
released by nilfs_dispose_list() at the end of nilfs_detach_log_writer().
Fix this issue by modifying nilfs_evict_inode() to only clear inode
without additional metadata changes that use nilfs_root if the file system
is degraded to read-only or the writer is detached.
Link: https://lkml.kernel.org/r/20230509152956.8313-1-konishi.ryusuke@gmail.com
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Reported-by: syzbot+78d4495558999f55d1da@syzkaller.appspotmail.com
Closes: https://lkml.kernel.org/r/00000000000099e5ac05fb1c3b85@google.com
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 'MAINTAINERS')
0 files changed, 0 insertions, 0 deletions