Messages in this thread Patch in this message | | | From | Zhihao Cheng <> | Subject | [PATCH 2/6] ubifs: Rectify space budget for ubifs_xrename() | Date | Tue, 11 Oct 2022 11:47:28 +0800 |
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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> --- fs/ubifs/dir.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c index 4705d9a77357..eeda471f05ee 100644 --- a/fs/ubifs/dir.c +++ b/fs/ubifs/dir.c @@ -1575,6 +1575,10 @@ 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); @@ -1600,6 +1604,7 @@ 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; -- 2.31.1
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