diff options
| author | Zhihao Cheng <chengzhihao1@huawei.com> | 2022-10-11 11:47:28 +0800 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2023-02-02 21:13:37 +0100 |
| commit | 1b2ba09060e41adb356b9ae58ef94a7390928004 (patch) | |
| tree | 5b9a3b23aed8f63d6db6daf397f239d916c5a5fc /fs/ubifs/dir.c | |
| parent | c2c36cc6ca23e614f9e4238d0ecf48549ee9002a (diff) | |
ubifs: Rectify space budget for ubifs_xrename()
There is no space budget for ubifs_xrename(). It may let
make_reservation() return with -ENOSPC, which could turn
ubifs to read-only mode in do_writepage() process.
Fix it by adding space budget for ubifs_xrename().
Fetch a reproducer in [Link].
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216569
Fixes: 9ec64962afb170 ("ubifs: Implement RENAME_EXCHANGE")
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'fs/ubifs/dir.c')
| -rw-r--r-- | fs/ubifs/dir.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c index aaff3f3f0aa3..94634b872e38 100644 --- a/fs/ubifs/dir.c +++ b/fs/ubifs/dir.c @@ -1576,6 +1576,10 @@ static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry, return err; } + err = ubifs_budget_space(c, &req); + if (err) + goto out; + lock_4_inodes(old_dir, new_dir, NULL, NULL); time = current_time(old_dir); @@ -1601,6 +1605,7 @@ static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry, unlock_4_inodes(old_dir, new_dir, NULL, NULL); ubifs_release_budget(c, &req); +out: fscrypt_free_filename(&fst_nm); fscrypt_free_filename(&snd_nm); return err; |