diff options
| author | Zhihao Cheng | 2022-10-11 11:47:27 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-03-11 13:55:19 +0100 |
| commit | f9e0748453675636356ffd45b3167a215ba84f53 (patch) | |
| tree | 39c0046a170acfcbc43ee7f6a3d45c1100559f57 /fs/ubifs/dir.c | |
| parent | 1c5fdf2d4647219d2267ccb08c7f2c7095bf3450 (diff) | |
ubifs: Rectify space budget for ubifs_symlink() if symlink is encrypted
[ Upstream commit c2c36cc6ca23e614f9e4238d0ecf48549ee9002a ]
Fix bad space budget when symlink file is encrypted. Bad space budget
may let make_reservation() return with -ENOSPC, which could turn ubifs
to read-only mode in do_writepage() process.
Fetch a reproducer in [Link].
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216490
Fixes: ca7f85be8d6cf9 ("ubifs: Add support for encrypted symlinks")
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/ubifs/dir.c')
| -rw-r--r-- | fs/ubifs/dir.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c index 0f29cf201136..aaff3f3f0aa3 100644 --- a/fs/ubifs/dir.c +++ b/fs/ubifs/dir.c @@ -1151,7 +1151,6 @@ static int ubifs_symlink(struct user_namespace *mnt_userns, struct inode *dir, int err, sz_change, len = strlen(symname); struct fscrypt_str disk_link; struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1, - .new_ino_d = ALIGN(len, 8), .dirtied_ino = 1 }; struct fscrypt_name nm; @@ -1167,6 +1166,7 @@ static int ubifs_symlink(struct user_namespace *mnt_userns, struct inode *dir, * Budget request settings: new inode, new direntry and changing parent * directory inode. */ + req.new_ino_d = ALIGN(disk_link.len - 1, 8); err = ubifs_budget_space(c, &req); if (err) return err; |